With the rapid development of the construction industry, the quality requirements for construction projects are becoming increasingly strict, and people are paying more and more attention to the quality of projects. The quality of building materials is a prerequisite and guarantee for the quality of construction projects, and testing is the most effective means to ensure the quality of inspection materials. Therefore, scientific testing and testing of various technical indicators of building materials must be carried out in accordance with relevant national and industry standards and specifications. Establish a sound quality assurance system, clarify material testing procedures, adhere to the three inspection system, ensure the quality of building materials, and ensure the quality of the project. Testing of building materials: 1. There are various types of building materials to be tested. Before various materials enter the site for use, we must conduct scientific testing and testing of various technical indicators of building materials in accordance with relevant national and industry standards and specifications. The main building materials generally refer to structural steel and welding specimens, cement, concrete test blocks, masonry mortar test blocks, waterproof materials, concrete and mortar admixtures, building sand and lightweight aggregates, etc. 2. To ensure the safety of engineering structures, we must conduct witness sampling and inspection in accordance with national regulations. The test blocks, specimens, and materials that must be witnessed for sampling and inspection include concrete test blocks for load-bearing structures and admixtures used in concrete. Steel bars and connecting joint specimens; Masonry mortar test blocks, bricks, and small concrete blocks for load-bearing walls; Cement used for mixing concrete and masonry mortar; Waterproof materials used in underground, roof, and restroom rooms; According to national standards, witness sampling and other test blocks, specimens, and materials that must be submitted for inspection must be implemented. There are many reasons for experimental errors, such as incorrect testing methods, the influence of temperature and humidity in the testing environment, and human factors. Among them, human factors have the greatest impact. If the operating methods used by the test operators are incorrect, the test results may not be correct, and errors may turn into errors. When conducting tensile tests on steel bars, some workers stop stretching the bars until there is necking, instead of breaking them. This is incorrect, and the obtained elongation results are incorrect. This is not a test error but a human error. We must master the correct experimental methods to avoid unnecessary errors. 4. Data processing Sometimes, the test results of the same group of specimens have a high degree of dispersion. In order to make the test results accurate, we should appropriately process the test results of some materials. For example, there are three situations when conducting strength compression and bending tests on cement mortar: ① If one of the three strength values exceeds the average value by ± 10%, the excess value needs to be removed, and the remaining two strength values should be averaged as the final test result; ② If two of the three strength values exceed ± 10% of the average, then the remaining one will be used as the test result; ③ If all three measurements exceed ± 10% of the average value, a retest is necessary
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2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is required1. The testing industry is fully covered, meeting different testing needs
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