Concrete Experiment Testing Quality Latest Standard Specification 10

The latest specifications of concrete strength inspection and evaluation standards are as follows:

The concrete strength should be subject to the compressive test results of the test block with standard curing and an age of 28d. Each set of specimens consists of three 150mm 150mm 150mm standard test blocks.

For the production mode of small batch of sporadic concrete, its quantity is limited, and it does not have the conditions to evaluate the concrete strength according to the statistical Zhenfan method, and the concrete strength can be assessed by non-statistical methods; When evaluating the strength of concrete by this method, the number of specimen groups n 9 forms a test batch, and its strength should meet the requirements of the following formula at the same time: mfcu, k, fcu, min, k.

Where: MFCU The average value of the compressive strength of concrete in the same acceptance batch, the standard value of the compressive strength of fcu, k concrete, and the minimum value of the compressive strength of concrete in the same acceptance batch.

The above is the introduction of concrete strength assessment. There are intervals and ranges for concrete strength assessment, which are generally calculated according to the calculation formula. Concrete is a substance mixed with cement, we must get the proportion right before we start construction, if the proportion is not right, the concrete is easy to shrink and crack.

If the concrete in a project is cracked, the problem is very serious, so you must pay attention to it at the beginning of the construction project.

1. Measurement. 1. Electronic measuring equipment should be used for the measurement of raw materials. The accuracy of the metering equipment shall meet the relevant provisions of the current national standard "Technical Conditions for Concrete Batching Plant (Building)" GB 10172, and shall have a valid verification certificate issued by the legal metrology department, and shall be regularly calibrated.

Concrete production units should self-inspect once a month; Before the start of each shift, the measuring equipment should be calibrated at zero point.

2. The allowable deviation of the measurement of each tray of concrete raw materials shall comply with the provisions of the following table, and the measurement deviation of raw materials shall be checked every shift.

2. Measurement. 1. Electronic measuring equipment should be used for the measurement of raw materials. The accuracy of the metering equipment shall meet the relevant provisions of the current national standard "Technical Conditions for Concrete Batching Plant (Building)" GB 10172, and shall have a valid verification certificate issued by the legal metrology department, and shall be regularly calibrated.

Concrete production units should self-inspect once a month; Before the start of each shift, the measuring equipment should be calibrated at zero point.

2. The allowable deviation of the measurement of each tray of concrete raw materials shall comply with the provisions of the following table, and the measurement deviation of raw materials shall be checked every shift.

Legal analysis: 1. The quality acceptance of the cast-in-place structure should be carried out after the mold is removed and before the concrete surface is not corrected and decorated, and a record should be made.

2. The contents that have been concealed and cannot be directly observed and measured can be checked for the acceptance record of the concealed project.

3. The structural components or parts of the trimming or rework should have text and image records before and after implementation.

Legal basis: Construction Law of the People's Republic of China

Article 37 The design of construction projects shall conform to the construction safety regulations and technical specifications formulated in accordance with the provisions of the State to ensure the safety performance of the project.

Article 38 When preparing the construction organization design, the construction enterprise shall formulate corresponding safety technical measures according to the characteristics of the construction project; For highly specialized engineering projects, special safety construction organization designs should be quietly prepared, and safety technical measures should be taken.

Article 39 Construction enterprises shall take measures such as maintaining safety, preventing dangers, and preventing fires at the construction site; If conditions permit, the construction site shall be closed for management. If the construction site may cause damage to adjacent buildings, structures and special working environments, the construction enterprise shall take safety protection measures.

The concrete quality test is to check the strength, durability, stability and uniformity of concrete, so as to ensure the safety and reliability of concrete structures. The requirements for concrete quality test are as follows:

The concrete test shall be carried out in accordance with the provisions of national standards or specifications, using qualified test equipment and materials, and operated and supervised by professionals.

The concrete test should be completed within the specified time to avoid the aging of the concrete or external influences.

A sufficient number of specimens should be taken to reflect the overall quality of the concrete, taking into account the location, location and use of the concrete.

The concrete test should be carried out in accordance with the prescribed methods and conditions to ensure the production, maintenance, transportation, storage and testing of the specimen.

Detailed test data and results should be recorded in the concrete test, analyzed and evaluated, and timely feedback and treatment of problems.