Can sand and gravel aggregate testing be done? What are the testing items and standards for sand and gravel aggregates? How much does sand and gravel aggregate solidity testing cost? How long does it take for sand and gravel aggregate inspection to come out? Foshan Huajin's third-party material testing laboratory can provide various sand and gravel aggregate testing services, including quality testing, composition testing, solidity, crushing value, mud content, particle gradation, RoHS testing, etc. As a third-party testing center, the institution has CMA, CNAS certification and testing qualifications, complete testing equipment, scientific and reliable data, and can issue a nationally recognized sand and gravel aggregate test report within 5-10 working days.
Sand and gravel aggregate is a general term for sand, gravel (gravel) stone, gravel, block stone, material stone and other materials in water conservancy projects. It is the main building material for structures such as concrete and masonry in hydraulic engineering. Sand and gravel aggregate is divided into coarse aggregate and fine aggregate, coarse aggregate refers to particle size greater than 475mm of rock particles, including pebbles and gravel; Fine aggregate refers to a particle size of less than 475mm rock particles, including natural sand and artificial sand (including manufactured sand and mixed sand).
Sand and gravel aggregate is an indispensable and important part of building materials, and the stability and reliability of its quality directly affect the quality and safety of the project. Therefore, the detection and quality control of sand and gravel aggregates are particularly important. How often and how often is the sand and gravel aggregate inspected and how long is the report issued?
The frequency of inspection of sand and gravel aggregates is specified by national standards and relevant industry specifications. For example, in the "Standard for Sand and Stone for Construction Engineering" (GB T 14684-2011), it is stipulated that sand and stone should be inspected according to the purchase batch, and more than 2 samples should be taken for each batch, and the signs such as origin, factory name, date, grade, use and name of the seller should correspond one by one. For the sand and stone with special requirements, further testing and evaluation should be carried out in accordance with the requirements of the specification.
For the process of sand and gravel aggregate testing, it is usually divided into two stages, namely raw material testing and finished product testing. According to different industry norms, the frequency of raw material testing and finished product testing are clearly defined.
For raw material testing, the number of samples per purchased batch is generally required to be no less than 3, and laboratory testing is required within 72 hours after the sample is sampling. As for the frequency of finished product testing, it is generally tested according to a certain number of products produced, such as every 750 tons or every 1,000 tons of products.
It should be noted that although the frequency of testing is specified in national standards and industry specifications, it also needs to be adjusted according to specific engineering requirements and quality control requirements in practical applications.
In the process of sand and gravel aggregate testing, the testing agency usually provides a test report. It should be noted here that the issuance time of the test report will be affected by a variety of factors, such as the number of samples, test content, test standards, test methods, etc. In general, the test report of raw materials needs to be issued within 3-5 working days after the sample is sent for inspection, while the test report of the finished product needs to be issued within 5-7 working days after the sample is sent for inspection.
It should be noted that the above times are for reference only, and the actual situation varies from one testing institution to another. At the same time, some testing items may require a longer testing cycle, so it is necessary to understand the testing cycle and requirements of the testing institution in advance in practical applications.
The frequency of sand and gravel aggregate testing and the issuance time of the test report shall be standardized under the guidance of national standards and industry norms. In practical application, it is necessary to adjust according to the engineering and quality requirements to ensure the stability and reliability of sand and gravel aggregates, and provide a strong guarantee for the safety and quality of construction projects.
How long does it take to do aggregate testing to get a report:
It should be clear that aggregate testing is to ensure the quality of concrete, so aggregate testing is required before concrete construction to ensure that the aggregate used meets the relevant standards. For aggregate testing, the testing items that need to be carried out include particle shape and size, strength, mud content, alkali-carbon reaction and other aspects. Different testing items require different testing methods and equipment, so the time to do aggregate testing will also vary.
In general, aggregate testing takes anywhere from a few hours to a few days. For simpler tests, such as particle size and shape, results are usually available in just a few hours. For complex tests, such as sludge content and alkaline carbon reactions, it can take days to produce results.
What items are tested for sand and gravel aggregates:
The parameters of the test items include particle gradation, needle flake, mud content, mud content, hardness, firmness, moisture content, chloride ions, density, compressive strength, particle gradation, fineness modulus, crushing index, etc. Among them, the particle gradation of crushed stone must be appropriate, continuous and uniform, and the content of needle flake particles should not be greater than 15%, and the mud content should not be greater than 10%, the mud content should not be greater than 05%, crushing index less than 20%.
Sand and gravel aggregate testing and inspection process:
1. Fill in the application form: contact Huajin testing staff to confirm the testing standards and projects, and sign the power of attorney.
2. Arrange to send samples: send the samples by express or directly to our laboratory.
3. Product testing: After payment, the laboratory arranges testing and issues a draft report.
4. Confirm the draft report and issue a formal report.
5. Report bill delivery service, as well as report interpretation and after-sales service.
The above is the relevant introduction of Huajin Testing on sand and gravel aggregate testing services, more about sand and gravel aggregate testing costs, standards, projects, cycles and other issues can be consulted by consulting ** engineer or call us. (Test The testing cycle, method and steps are subject to the engineer, if the sample is special, you can communicate with the engineer about the particularity of the sample, and the institution can design a reasonable testing and analysis plan for you to save your time).