The act of sampling the concrete mixture. Sampling form for testing concrete cubes Certificate of selection of concrete mixture

It is advisable for the delivery to be carried out by the manufacturer of the mixture using ABS. The longest duration of transportation of concrete should not exceed the shelf life of its properties, which is specified in the application. The moment of delivery of concrete for the purpose of guaranteeing its quality is the beginning of unloading at construction site ABS. In this case, the unloading time of the concrete mixer truck should not exceed 60 minutes. 4. Rules for acceptance of the mixture at the construction site. The fact of acceptance of the quantity of the mixture is confirmed by the transport bill of lading, which is signed by the consumer upon completion of the incoming control operations (for example, the temperature of the mixture and determination of workability). In accordance with clause 6.4. GOST, no more than 20 minutes of time are allocated for incoming control of the mixture. A sample of the concrete mixture is directly taken from the ABS in the volume that is necessary for carrying out various types of tests.

Concrete sampling report sample form

Skill hits the target where arrogance overshoots and uncertainty undershoots. 1. Training of a concrete plant operator. Practical skills for laboratory assistants according to individual programs. 3.Accreditation of laboratories (authorization in ESS NLP) 4.Certification of laboratory personnel (testing laboratory assistant, test engineer) Contacts: 89260578673 For customers who are forced to obtain a concrete mixture sampling act and an act on the production of control samples of concrete, a new concrete mixture sampling act purpose sampling production of control samples of concrete A gift from the head of the Mostostroykhkhd laboratory has been sent. Soon a whole section will appear Sampling report concrete mixture, There is already a copy of the act of sampling concrete on the blog, Hurray 4 ACT of sampling (samples) of the concrete mixture No. "" 201

There's nothing here!

Before loading the concrete mixture into the mold, it must be lubricated thin layer lubricants The selected sample of the concrete mixture is placed in the mold no later than 20 minutes from the moment of its selection. The concrete mixture is compacted in the forms using a metal bayonet with a diameter of 16 mm.


Attention

When compacting a hard mixture (less than 10 cm), the mold is placed on a vibrating platform and additionally vibrated until the concrete mixture is completely compacted. Samples are subject to demoulding one day after their manufacture. After stripping, the forms must be cleaned of concrete residues and lubricated with lubricant, thereby preparing them for subsequent tests.


After the samples are removed from the molds, they are placed in the conditions necessary for hardening (conditions identical to the design, normal hardening chamber, steaming chamber).

Concrete sampling report

This will help the consumer, as a result, accept correct solution to select a concrete mix supplier. But also directly to the consumer to receive concrete required quality, you need to correctly formulate your own requirements already at the stage of concluding a contract for the supply of concrete. What needs to be reflected in the contract for the supply of concrete mixture 1.

Info

Determining what constitutes a batch of concrete supplied. Here it is advisable to adopt the formulation of GOST 18105-2010: a batch of concrete mixture is a volume of a mixture of a homogeneous composition produced over a certain time (for example, per shift), when the conditions for delivery and preparation of the mixture remained unchanged. 2. Application for the supply of a certain volume of concrete mixture.


An application in the established form is a mandatory attachment to the contract.

Sampling report

The act of sampling is drawn up in a bilateral act. If the results of the incoming control are negative (for example, when it is not possible to raise the temperature of the mixture or restore the design workability), the concrete of this load is not subject to acceptance. 5. Procedure for restoring the design workability of the mixture. The decision to restore design workability is made by the person responsible for the construction.

The restoration procedure is carried out together with the ABS forwarding driver and an employee of the construction organization who is responsible for construction control. The amount and type of plasticizer introduced into the mixture, the duration of mixing and the speed of rotation of the drum necessary to restore the design workability are provided for in the technological regulations of the mixture manufacturer.

Concrete sampling act sample

It is advisable to also reflect this procedure, which provides the consumer with additional protection, in the concrete supply contract. Sample contract for the supply of concrete Date of introduction 01/01/91 This standard applies to concrete of all types in accordance with GOST 25192 and establishes methods for determining their strength in prefabricated and monolithic concrete and reinforced concrete structures and products (hereinafter referred to as structures), sampling from structures, manufacturing from these samples control samples and determination of the ultimate strength of concrete in compression, axial tension, splitting tension and bending tension (hereinafter referred to as strength) during destructive short-term static tests of samples. The standard should be applied, as a rule, during inspection and expert testing of the strength of concrete in the structures of existing and reconstructed buildings and structures.

Act on the production of control samples of concrete

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Form of cement sampling report from the manufacturer

Claims regarding the number in this situation can only be made as a result of removing the formwork. This condition must be specified in the contract.

  • for the quality of the mixture - 31 calendar days. This period necessary to be able to check control samples that were taken at the time of acceptance of the mixture and stored under normal conditions.
  • 8.
    Rules for checking the achievement of design properties by concrete. The manufacturer must inform the consumer of the results of monitoring the strength of concrete at intermediate and design ages, which are specified in the application, no later than 3 days after the tests. The consumer can carry out a control check of the standardized quality indicators of concrete by testing control samples that are selected from the mixture during incoming inspection for compliance with the requirements of individual standards.

Concrete sampling report, sample fill

During such a check, the consumer has the right to demand that the manufacturer provide the opportunity to familiarize himself with the records in executive documentation, which relate to the control of concrete of specific replacement batches. The procedure for conducting and organizing inspections is established in the contract. 9. Warranties provided by the manufacturer.


Guarantees for achieving the design properties of concrete are given by the manufacturer only if the builders confirm the implementation of the technology correct installation concrete. The decision on warranty obligations is made after confirmation of the implementation of the concrete laying technology by a third party. 10. Procedure for resolving controversial issues. An independent testing laboratory may be involved to resolve controversial issues regarding the design properties of concrete from a third party.

Concrete sampling report sample

It is allowed to use cylinders with a diameter of 44 to 150 mm, a height of 0.8 to 2.0 diameters when determining compressive strength, from 0.4 to 2.0 diameters when determining tensile strength during splitting, and from 1.0 to 4. 0 diameters when determining axial tensile strength. For all types of tests, a sample with working section dimensions (150 ´ 150) mm is taken as the base one. 1.2.2. The minimum size of the sample (diameter and height of the cylinder, edge of the cube, cross-sectional side of the prism) must exceed the maximum nominal size of the coarse aggregate used to make the concrete of the structure from which the test sample is taken, unless it exceeds 70 mm by at least: 2 times - for samples tested in compression 3 times - for samples tested in tension.
1.3. Samples are tested in batches.

Act of sampling and samples of concrete

At the current pace of development of construction, companies involved in it are interested in the quality of purchased building materials. Concrete, by its properties, is one of the main materials that influences the timing and quality of commissioned objects. To identify deficiencies in a timely manner, there is a procedure for removing samples.
Sampling of concrete Control of the properties and quality of concrete declared by the manufacturer is determined using sampling regulated by GOST and their subsequent testing. A sample is a certain amount of concrete mixture from one composition, selected during the production of one batch or one vehicle transporting concrete, intended for the preparation of one or several series of samples. In accordance with existing rules, the sample is taken from the middle of the batch or concrete mixer truck.

The number of samples in each series must correspond to that given in table. 1. 1. Sampling of petroleum products (oil or fuel): When submitting samples to the laboratory, the following is required: - Information on regulatory documentation: GOST, TU or ISO. or an indication of the brand (for example, diesel fuel “L-0.2-40 GOST 305-82” or oil M16G2tss) 2. Sampling of foam concentrate: When submitting samples to the laboratory, the following information must be provided.

— Certificate of the Marine or River Register (if available). — Place of sampling — Multiplicity of the ship’s fire extinguishing system — Concentration of the foaming agent used Report of sampling of the foaming agent (download) with the seal and signatures of interested parties. A sample of filling out a selection act can be seen in the Sample Acts section. 3. Sampling of oily water: It should be taken into 4 (four) clean glass containers with a volume of at least 0.5 liters.

When monitoring in production, samples of the concrete mixture must be taken based on the test objectives and entered into the sampling report:

  • at the place where the concrete mixture is laid, if a product or structure is being produced that is intended for immediate placement;
  • at the place of preparation when loading into a container, if the concrete is produced for tempering.

Compilation rules

A sample should be taken immediately before starting the filling process from the middle of the batch. If the concrete mixture is supplied continuously (for example, using concrete pumps or conveyor belts), then samples should be taken at least three times within a 10-minute interval. The number of intervals can be arbitrary - as many as needed.

The sample volume must be sufficient to allow the quality of the mixture to be monitored in at least two parameters.

The sample should be stirred immediately before testing unless it contains an additive or is not preheated. In this case, it should not be mixed.

The maximum time after which the selected mixture should be analyzed is 10 minutes. After this interval, if tests have not been carried out, a new sample must be taken.

The temperature of the mixture when taking a sample and at the end of the test should not differ by more than 5 degrees Celsius. In addition, it is necessary to exclude moisture loss or, on the contrary, its penetration from the moment the sample is taken until the start of testing.

Testing of equipment and measuring instruments is carried out in accordance with GOST 8.001, GOST 8.326, GOST 8.383.

The results of the study are included in the sampling report. It must contain the following information:

  • information about the organization that produced the concrete mixture;
  • name of the mixture according to GOST 7473;
  • time and place of analysis;
  • mixture temperature;
  • name of the quality indicator;
  • research results for various indicators and the arithmetic average result.

Sampling of standardized products

Before selection, when inspecting a batch of products, a laboratory representative must familiarize himself with the documentation (invoices, quality certificates, certificates, declarations of conformity) and carry out an external inspection of the entire batch.

He must: pay attention to the condition of the container (serviceability, presence of deformation, contamination), compliance of packaging and labeling with the requirements of the RD, compare the labeling data on the packaging with the document data; check compliance temperature regime, conditions and transportation time.

After the inspection, individual packaging units are opened, an average sample is selected and organoleptically assessed, and the products are weighed.

In case of disagreement in quality assessment or detection of defective products, a sample (sample) is taken from the average product for laboratory analysis. In this case, the representative of the laboratory draws up a “Sampling Report” (Appendix 3) in two copies. The first copy of the act remains at the enterprise for writing off the seized products, the second - for the laboratory.

At the current pace of construction development, companies involved in it are interested in the quality of purchased building materials.

Concrete, by its properties, is one of the main materials that influences the timing and quality of commissioned objects.

To identify deficiencies in a timely manner, there is a procedure for removing samples.

Control of the properties and quality of concrete declared by the manufacturer is determined using sampling regulated by GOST and their subsequent testing.

A sample is a certain amount of concrete mixture from one composition, selected during the production of one batch or one vehicle transporting concrete, intended for the preparation of one or several series of samples.

In accordance with existing rules, a sample is taken from the middle of the batch or concrete mixer truck.

The concrete sampling procedure is activated by authorized persons by drawing up an appropriate document.

This document is drawn up collectively and is mandatory in the as-built documentation of the structure and confirms the quality of the concrete mixture.

The completed concrete sampling report must contain the following mandatory data:

The absence of an act may serve as a basis for refusal to accept the constructed structure by the customer, since failure of the quality of concrete to meet the design requirements may lead in the future to a significant increase in costs during the subsequent operation of the building, and in the worst case, its destruction.

Below is a standard form and a sample concrete sampling report, a version of which can be downloaded for free.

Work from the archives of the RION printing house - form number RA0247.

You can order printing of a similar form with modifications to meet the requirements of your work.

Request information (archive)

Request information (archive)

Do you need to produce printed products?

We will be happy to help you!

Letter of the State Customs Committee of the Russian Federation dated N 01-15

Letter of the State Customs Committee of the Russian Federation dated N 01-15

Batch - a quantity of goods, homogeneous in quality and name, produced over a certain period of time under the same conditions, intended for import/export, issued with one document certifying quality and one cargo customs declaration. Sample - number of units vehicle, selected from total number transport units of the railway train.

Form of the act of sampling (samples)

Sampling of milk and dairy products.

General requirements This standard applies to milk and dairy products and establishes General requirements on selection during radiation monitoring of gamma- and beta-emitting radionuclides. The standard is mandatory for use by business entities, regardless of their form of ownership, that produce, process, sell and store milk and dairy products.

Concrete sampling report

Table 17 - Minimum sampling frequency for conformity assessment Production Minimum sampling frequency First 50 m3 of industrial and copper* products After the first 50 m3 of manufactured products* higher value frequency Concrete (factory system production control certified) Concrete (factory production control system is not certified) Initial period (before heaving at least 35 test results) 3 samples 1 sample per 200 m3 or 1 sample every three production days* 1 sample per 150 m3 or 1 sample every production day4* Constant established production (with at least 35 test results available) 1 sample per 400 m3 of product or 1 sample every five production days' - d. or 1 sample every calendar month a Sampling should be uniform during the preparation process, no more than one sample should be taken for every 25 m3.

Concrete sampling report

It is important to remember that the sampling report is drawn up in two copies - one remains with the contractor, the second is provided to representatives of technical supervision or other regulatory body. Procedure for drawing up a document When drawing up a document, be sure to indicate the date, the name of the construction organization and the construction site, as well as the name of the manufacturer

To conduct tests and issue a conclusion on the compliance of the declared parameters of the supplied concrete, a certificate of conformity issued by the supplier must be attached to the report. concrete mortar, the number and date of which are also entered in the document. The technical part of the form to be filled out must indicate the class of concrete, the shape of the samples taken (it can be different, depending on the indicators for compliance with which the tests will be carried out), as well as the number of samples and their markings.

Sampling form for testing concrete cubes

  • The “hammer” is applied to the concrete (or the device itself - it all depends on the model) strictly perpendicularly and pressed. The value is displayed on the screen.

Non-destructive method

  • Depending on the device, it is necessary to carry out similar measures different quantities times, not exceeding 20. Based on their results, the device displays an average value, which is entered into the protocol.

All reinforced concrete structures already installed on site are subjected to a similar method.

It is also considered an “insurance” method in reinforced concrete factories, if concrete in compression at 7-day and 28-day age showed poor results.

After full exposure they “listen” the product and decide what to do with it next - scrap or construction. This article will tell you in more detail how to conduct such a test.

GOST 10180-2012 concrete. methods for determining strength using control samples

Attention: Structures whose concrete is tested for strength:

  • foundation;
  • columns, pillars;
  • floors;
  • walls;
  • beams;
  • prefabricated structures made of concrete, reinforced concrete.

How to make samples? The samples are a cube, a cylinder, a prism. Their form depends on the type of test. When checking compressive strength, cubes are used. They come in these sizes:

  • 7*7*7 cm;
  • 10*10*10 cm;
  • 15*15*15 cm;
  • 20*20*20 cm.

Unsatisfactory destruction of cylinder samples.

Prisms (4*4*16 cm) are used to determine the limit of tensile strength in bending. The cylinders have a diameter of 4.4 - 15 cm, a height of 8 - 20 cm. These dimensions are established by GOST 10180 - 90 and the samples must comply with it. Non-compliance with standards leads to additional processing that adjusts them to the standards.

1 area of ​​use

During the construction of facilities, with high category responsibility, it is important to control the quality of both the work performed and the materials supplied, especially commercial mixtures such as concrete. . If you do not carry out these procedures in a timely manner and do not formalize them correctly, then if problems arise, after completion construction work, difficulties may arise in determining the guilt of both supplier organizations and work producers

If these procedures are not carried out in a timely manner and they are not formalized correctly, then if problems arise after the completion of construction work, difficulties may arise in determining the guilt of both the supplying organizations and the work producers.

  • 1 Conditions for acceptance of concrete mixture
  • 2 Procedure for drawing up the document

Conditions for acceptance of concrete mixture The quality of the concrete mixture at the manufacturing plant is controlled by a testing laboratory.

Acceptance of the solution at the construction site is carried out by a specialist from the contracting organization (laboratory assistant) in the presence of the work contractor or foreman.

Concrete sampling report

Already compacted material will not give reliable results, so it is best to take the solution from the next batch. Sampling The volume of material sampled for the production of control samples must be carried out within officially established limits:

  • when manufacturing products with a volume of more than 2 m3, more than three series of samples are required;
  • one series of samples for the volume sold to the consumer - there should not be more than 50 m3 of samples from one brand;
  • during production monolithic structures, depending on the volume of products produced, there must be at least one series of samples per product.

If the material is produced at a construction site, it is collected into an ordinary tin bucket (or buckets) and taken to the laboratory urgently - until the cement laitance appears on the surface.

Concrete strength testing

The equipment is simple:

  • press;
  • certified scales;
  • Stage 3.

Source:

GOST Concrete Sampling Report

The act of sampling is drawn up in a bilateral act. If the results of the incoming control are negative (for example, when it is not possible to raise the temperature of the mixture or restore the design workability), the concrete of this load is not subject to acceptance. 5. Procedure for restoring the design workability of the mixture.

The decision to restore design workability is made by the person responsible for the construction. The restoration procedure is carried out together with the ABS forwarding driver and an employee of the construction organization who is responsible for construction control.

The amount and type of plasticizer introduced into the mixture, the duration of mixing and the speed of rotation of the drum necessary to restore the design workability are provided for in the technological regulations of the mixture manufacturer.

There's nothing here

  • 1 Why is concrete tested?
  • 2 How to make samples?
  • 3 What is included in the test report?
  • 4 Conclusion

The quality of a concrete mixture can be checked using a series of special tests to determine its compliance necessary standards. The most common test is to determine the compressive strength of concrete. Additionally, other concrete characteristics are checked.

All results are recorded in a concrete test report. Why is concrete tested? Special samples of concrete mortar are tested. Thus, during the construction of a building or structure, the quality of concrete is controlled.
Test concrete from factory and own production. The main task of the tests is to determine the compressive strength limits and the actual grade of concrete.

There's nothing here

Name of material concrete mixture BST(M) V P F W Organization-performer of the work //// Purpose of sampling: production of control samples to determine the physical and mechanical characteristics of concrete and the characteristics of the concrete mixture. Product supplier (passport): name of the supplier organization Samples selected bucket, trowel equipment used Samples selected in accordance with GOST 7473 GOST 10181 GOST 10180 GOST 18105 Contract for the supply of concrete Contents of the article: GOST 7473-2010 obliges the manufacturer of concrete mixtures to “ensure the production of concrete at specified quality indicators... in accordance with the supply contract.”
This GOST also provided for the right of the consumer to receive from the manufacturer, before the start of delivery of concrete, information on the results of preliminary tests of concrete of this ... composition and concrete for all indicators specified in the supply contract.

Hinged supports are installed on the prism, and a special traverse is placed on them, and the press is started. Work process

  • Stage 4. The value is taken as the average of all samples in which destruction occurred in the middle third of the prism. When testing samples with dimensions of 200x200x800 mm and 150x150x600 mm, the obtained strength is multiplied by a factor of 0.1, and for samples of 100x100x400 mm by 0.95. The resulting values ​​are entered into the protocol.

Non-destructive testing of concrete products Non-destructive testing Ultrasonic testing refers to non-destructive methods- namely, its strength. The ultrasound method has become available since its invention special devices, which allow you to “listen” to the material and produce an accurate result. Under the Soviets, concrete was tapped with a Kashkarov hammer, and according to certain characteristics it was determined how high quality it was.

Concrete sampling act sample

Claims regarding the number in this situation can only be made as a result of removing the formwork. This condition must be specified in the contract.

  • for the quality of the mixture - 31 calendar days.
    Attention: This period is necessary to be able to check control samples that were taken at the time of acceptance of the mixture and were stored under normal conditions.
  • 8. Rules for checking whether concrete has achieved its design properties.
    The manufacturer must inform the consumer of the results of monitoring the strength of concrete at intermediate and design ages, which are specified in the application, no later than 3 days after the tests. The consumer can carry out a control check of the standardized quality indicators of concrete by testing control samples that are selected from the mixture during incoming inspection for compliance with the requirements of individual standards.

If samples taken from a structure are not tested immediately after their removal, then the possibility of gradual changes must be taken into account. physical and mechanical characteristics concrete samples during their storage. It is known, for example, that in large blocks the concrete inside the mass may differ in its characteristics, including strength, from the concrete of the outer layers of the same mass. After the deep sample is removed from the block, the latter finds itself in different conditions during storage, and its strength can quickly increase.

The sample therefore ceases to characterize the state of similar material remaining in the depths of the structure. The main requirement is the speedy testing of concrete samples taken from the structure.

Concrete strength testing

The equipment is simple:

  • press;
  • certified scales;
  • certified metal ruler.

For compression, control measures are carried out in accordance with GOST 10180−2012 as follows:

  • Stage 1. Prepare the cubes.
  • Step 2: Each sample is weighed and measured. If there is a large deviation in the parameters, the cube is considered unsuitable for control.
  • Stage 3.

The sample is installed on the prepared press in such a way that the edges in contact with the press are smooth and do not represent the molding side. She begins to collapse first.

Conducting a compression test

Stage 4. The limiting load is considered to be at which complete destruction of the sample occurs.

Protocol

  • Stage 5.

Taking analysis of concrete actors

If there is a deviation from the specified mobility values, the conditions for transporting the concrete mixture should be improved or its composition adjusted. Quality control of laying and compacting the concrete mixture comes down to monitoring the organization of these works, especially the operation of compacting mechanisms, in order to eliminate all shortcomings that interfere with timely compaction and disrupt the homogeneity of concrete in the structure.
To identify deficiencies in a timely manner, there is a procedure for removing its samples. Sampling of concrete Control of the properties and quality of concrete declared by the manufacturer is determined using sampling regulated by GOST and their subsequent testing. In accordance with existing rules, a sample is taken from the middle of the batch or concrete mixer truck. There's nothing here! Deviations in the marks of surfaces and embedded parts that serve as supports for metal or prefabricated reinforced concrete columns and other prefabricated elements should not be more than -5 mm.
Deviations in plan at location anchor bolts inside the contour of the support should be no more than 5 mm, when located outside the contour of the support - no more than 10 mm, the permissible deviation in height is +20 mm. Deviations in height marks at the junction of two adjacent surfaces should not exceed 3 mm.

Concrete sampling report sample form

According to the rules, of course, it is necessary for a mobile laboratory to come to the site - but what is not there is not there. Especially in small towns. When sampling has been carried out, the first control measures can begin. Determination of workability Feeding the mixture into the formwork Not only in laboratories, but also on construction sites, workability and rigidity are monitored.

Attention

The data obtained gives digital values in centimeters, which can be classified and a grade assigned to the prepared material according to mobility. The process is not complicated and training to become a laboratory assistant is not required.

You just need to have certain knowledge, which we will share.

  • Special conical shape with stops. You can make it yourself, following the exact recommendations of the standard.

Testing concrete at different stages of production interesting and useful information

Permissible deviations in the dimensions and position of monolithic concrete and reinforced concrete structures SNiP Sh-15-76 are standardized from the design ones. Deviations of planes and their intersection lines from the vertical or from the design slope to the entire height of the structure should not exceed, mm: For foundations ±20 For walls and columns supporting monolithic floors and coverings ±15 For walls and columns supporting prefabricated beam structures ±10 For walls of buildings and structures erected in sliding formwork For walls of buildings and structures erected in sliding formwork, in the presence of intermediate floors 1/1000 of the height of the structure, but not more than 50 Deviation of planes from the horizontal should not exceed 20 mm over the entire plane of the area being verified.

During the construction of objects with a high category of responsibility, it is important to control the quality of both the work performed and the materials supplied, especially commercial mixtures such as concrete. If these procedures are not carried out in a timely manner and they are not formalized correctly, then if problems arise after the completion of construction work, difficulties may arise in determining the guilt of both the supplying organizations and the work producers.

The quality of the concrete mixture at the manufacturing plant is controlled by a testing laboratory. Acceptance of the solution at the construction site is carried out by a specialist from the contracting organization (laboratory assistant) in the presence of the work contractor or foreman. It is important to remember that the sampling report is drawn up in two copies - one remains with the contractor, the second is provided to representatives of technical supervision or other regulatory body.

Procedure for drawing up the document

When drawing up a document, you must indicate the date, the name of the construction organization and the construction site, as well as the name of the manufacturer. To conduct tests and issue a conclusion on the compliance of the declared parameters of the supplied concrete, a certificate of conformity issued by the supplier of the concrete solution, the number and date of which is also entered in the document, must be attached to the report.

The technical part of the form to be filled out must indicate the class of concrete, the shape of the samples taken (it can be different, depending on the indicators for compliance with which the tests will be carried out), as well as the number of samples and their markings.

If the supplied material had any non-standard parameters, for example, too low or high temperature, then this should be displayed in the “additional characteristics” column.

The act of sampling is an integral part of the sample testing protocol.

Home pageMagazines Act on the production of control samples of concrete Login Home pageMagazines Act on the production of control samples of concrete Author: admin dated July 3, 2015, section: Magazines, views 4506 Production of samples of concrete cubes according to GOST 10180-90 To determine the strength of concrete used in concreting, samples are made - cubes of concrete. To test concrete for strength, cube samples with an edge of 200x200, 150x150, 100x100 mm are made (it is allowed to make samples with an edge of 70 mm, provided that largest size coarse aggregate does not exceed 20 mm). A sample of the concrete mixture is taken in accordance with GOST 10181.0. The number of samples in a series is taken from 2 to 6 (depending on the internal coefficient of variation) for each test date (7 and 28 days). Samples are produced in verified forms in accordance with GOST 22685 (1ФК, 2ФК, 3ФК).

Concrete sampling report sample form

This will help the consumer, as a result, make the right decision when choosing a concrete mix supplier. But directly to the consumer, in order to receive concrete of the required quality, you need to correctly formulate your own requirements already at the stage of concluding a contract for the supply of concrete.


What needs to be reflected in the contract for the supply of concrete mixture 1. Determination of what constitutes a batch of concrete supplied.

Important

Here it is advisable to adopt the formulation of GOST 18105-2010: a batch of concrete mixture is a volume of a mixture of a homogeneous composition produced over a certain time (for example, per shift), when the conditions for delivery and preparation of the mixture remained unchanged. 2. Application for the supply of a certain volume of concrete mixture.


An application in the established form is a mandatory attachment to the contract.

Concrete sampling report

When using larger quantities of ground blast furnace slag, its excess should not be taken into account either in the calculation of the water/(cement + ^-amount of ground blast furnace slag) or in the calculation of the minimum cement content. Introduction Attention In case of doubt 43 GOST R 57345-2016 End of table 28 Equipment Inspection/testing Purpose Minimum frequency Additive dispenser (including similar equipment on automatic mixers) Visual control of operation Ensure that the measuring equipment is clean and functions flawlessly For each additive at the first use during the day Test the weighing equipment and ensure that the dosing device is completely unloaded Compliance with the requirements of 9.B.2.2 After installation.
At regular intervals9 after installation.
The number of samples in a series is taken from 2 to 6 (depending on the internal coefficient of variation) for each test date (7 and 28 days). Samples are produced in verified forms in accordance with GOST 22685 (1ФК, 2ФК, 3ФК).
Before loading the concrete mixture into the mold, it must be lubricated with a thin layer of lubricant. The selected sample of the concrete mixture is placed in the mold no later than 20 minutes from the moment of its selection.
The concrete mixture is compacted in the forms using a metal bayonet with a diameter of 16 mm. When compacting a hard mixture (less than 10 cm), the mold is placed on a vibrating platform and additionally vibrated until the concrete mixture is completely compacted.


Samples are subject to demoulding one day after their manufacture. After stripping, the forms must be cleaned of concrete residues and lubricated with lubricant, thereby preparing them for subsequent tests.

Concrete sampling act sample

Claims regarding the number in this situation can only be made as a result of removing the formwork. This condition must be specified in the contract.

Sampling report

Before loading the concrete mixture into the mold, it must be lubricated with a thin layer of lubricant. The selected sample of the concrete mixture is placed in the mold no later than 20 minutes from the moment of its selection.

The concrete mixture is compacted in the forms using a metal bayonet with a diameter of 16 mm. When compacting a hard mixture (less than 10 cm), the mold is placed on a vibrating platform and additionally vibrated until the concrete mixture is completely compacted.

Samples are subject to demoulding one day after their manufacture. After stripping, the forms must be cleaned of concrete residues and lubricated with lubricant, thereby preparing them for subsequent tests. After the samples are removed from the molds, they are placed in the conditions necessary for hardening (conditions identical to the design, normal hardening chamber, steaming chamber).

Act on the production of control samples of concrete

In case of doubt Water meters and dosing devices on concrete mixers Testing of measuring equipment Compliance with the requirements of 9.6.2.2 After installation. At regular intervals9 after installation. 1. general provisions Silica fume for concrete - Part 1: Definitions, requirements and conformity criteria EN 13577. Chemischer Angriff an Beton - Bestimmung des Gehaits an angreifendem Kohlendioxide in Was * ser (Chemical attack on concrete. Determination of aggressive carbon dioxide content in water) Chemical attack on concrete - Determination of aggressive carbon dioxide content in water EN 14199.

At the current pace of construction development, companies involved in it are interested in the quality of purchased building materials. Concrete, by its properties, is one of the main materials that influences the timing and quality of commissioned objects.

To identify deficiencies in a timely manner, there is a procedure for removing samples. Sampling of concrete Control of the properties and quality of concrete declared by the manufacturer is determined using sampling regulated by GOST and their subsequent testing.

A sample is a certain amount of concrete mixture from one composition, selected during the production of one batch or one vehicle transporting concrete, intended for the preparation of one or several series of samples. In accordance with existing rules, a sample is taken from the middle of the batch or concrete mixer truck.

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Concrete sampling report

It is important to remember that the sampling report is drawn up in two copies - one remains with the contractor, the second is provided to representatives of technical supervision or other regulatory body. Procedure for drawing up a document When drawing up a document, be sure to indicate the date, the name of the construction organization and the construction site, as well as the name of the manufacturer.

To conduct tests and issue a conclusion on the compliance of the declared parameters of the supplied concrete, a certificate of conformity issued by the supplier of the concrete solution, the number and date of which is also entered in the document, must be attached to the report. The technical part of the form to be filled out must indicate the class of concrete, the shape of the samples taken (it can be different, depending on the indicators for compliance with which the tests will be carried out), as well as the number of samples and their markings.

GOST Concrete Sampling Report

The act of sampling is drawn up in a bilateral act. If the results of the incoming control are negative (for example, when it is not possible to raise the temperature of the mixture or restore the design workability), the concrete of this load is not subject to acceptance. 5. Procedure for restoring the design workability of the mixture.

The decision to restore design workability is made by the person responsible for the construction. The restoration procedure is carried out together with the ABS forwarding driver and an employee of the construction organization who is responsible for construction control.

The amount and type of plasticizer introduced into the mixture, the duration of mixing and the speed of rotation of the drum necessary to restore the design workability are provided for in the technological regulations of the mixture manufacturer.

Concrete sampling report Belarus

Table 17 - Minimum sampling frequency for conformity assessment Manufacturing Minimum sampling frequency First 50 m3 of production After the first 50 m3 of production* higher frequency Concrete (FPC certified) Concrete (FPC not certified) ) Initial period (before the release of at least 35 test results) 3 samples 1 sample per 200 m3 or 1 sample every three production days* 1 sample per 150 m3 or 1 sample every production day4* Continuous established production (if there are at least 35 test results) 1 sample per 400 m3 of product or 1 sample every five production days' - d. or 1 sample every calendar month a Sampling should be uniform during the preparation process, no more than one sample should be taken for every 25 m3.