Quality control measures for building materials testing?

What are the specific contents of quality control measures for building materials testing? Zhong Da Consulting will answer your questions below.

The construction industry has been incorporated into the three major industries in China. With the rapid development of the construction industry, quality control is also worth worrying about. The construction process is generally divided into the following points: ① the developer applies for the development of property rights; (2) Hire an engineering team for construction; (3) the source of building materials; ④ Quality supervision of relevant departments. Among them, the source of building materials is the most important, which is related to the service life and life safety of buildings, so the relevant regulatory authorities must strictly control building materials.

1 quality problems of building materials

1. 1 Problems in the construction industry

Since the country vigorously reformed the construction industry, more and more businessmen began to invest in real estate development, and market competition led to the highest price. In order to maximize profits, the winning developer wants to start with the construction team and building materials. The quality and ability of construction team personnel are uneven. Engaged in construction work, it requires both strong professional ethics and strong professional ability. In reality, due to the differences in practical experience, working ability and working attitude, many employees have great deviations in the process, which directly affects the quality and safety of the project.

1.2 inspection status of building materials

After the reform and opening up, the traditional methods of manual filling and manual statistics have been used for a long time in building materials testing. This requires a lot of testers. Often tested several times, there will always be various omissions, repetitions and mistakes. With the progress of the times, network information technology has gradually replaced manual recording. Its advantage is that it can store a lot of information without losing or making mistakes. When calculating the error, the correct data can be obtained accurately, which greatly improves the efficiency and reduces the probability of manual operation error. There is also the developer's unplanned procurement of materials, and the material classification is not careful, which is easy to cause mixed pile phenomenon, and the on-site management also has shortcomings. For example, cement, steel and other building materials often get wet and rust due to weather, so these building materials lose their original safety performance, which increases the difficulty of quality inspection and the error of repeated sampling. In the process of quality inspection, because the materials piled up in front are not carefully classified, it is often easy to lead to missed inspection in the back, so that materials that do not meet the specifications are regarded as qualified materials, which will cause great safety and quality hidden dangers.

2 building materials quality control measures

2. 1 Pre-entry inspection of building materials

There are many kinds of building materials, not to mention different materials, even similar materials, which have many differences in shape, size and specifications. Therefore, before entering the market, we must first test them, classify the same materials, and test different types of materials in turn to achieve the first round of control effect. For the testing of building materials, the purpose of testing is to meet the requirements of relevant state departments for material quality and safety. Whether it is the inspection before entering the site or the repeated inspection after entering the site, the more the better. For example, the influence of weather on building materials can not be ignored, because building materials are generally piled up in large quantities, and the testing time is not overnight. Therefore, according to the temperature and humidity of the site environment and the length of stacking time, it will affect the stability and difference of multiple tests before and after. Among the building materials, the cement used for concrete needs to be tested in batches for stability, setting time, fineness and strength after setting to ensure that there are no fish escaping from the net. Then, for the metal materials used, it is necessary to test various mechanical properties of the material itself according to the specifications and models of the material, such as tensile strength, ductility, impact resistance and other properties. Before building materials enter the building, they are mainly tested from two aspects: ① the appearance, size, performance and quantity of the materials; (2) Carefully consult the written documents of material quality. There are many inspection methods for building materials, including general inspection, witness sampling inspection, unqualified re-inspection and supervised sampling inspection. When the materials fail to pass the re-inspection, it is allowed to re-extract double materials for re-inspection. The re-inspection must be carried out under the supervision of the relevant units and can only be put into use after passing the inspection. If it is still unqualified, then the material must be sealed in place and not put into use. Under the supervision of relevant departments, unqualified materials shall be handled by professionals to avoid unqualified materials from being mixed into the construction and endangering the safety of buildings, lives and property.

2.2 Quality control of building materials after entering the site

After the materials enter the site, they shall still be accepted as required. In the daily supervision and inspection and on-site inspection, the quality supervisor should focus on the re-inspection of building materials entering the site. Building materials entering the site must be carefully checked with the submitted material list, which includes data specifications such as types and models. Are different types and models of materials placed separately in the correct way during each inspection? Only after the inspection is correct can we avoid taking the wrong materials and using the wrong materials. This can not only manage the materials well, but also help to analyze the causes of quality accidents in the future. When problems are found, they should be registered in time and reported to the relevant regulatory authorities.

3 Conclusion

In the quality management of building materials, we must strictly control the quality of building materials and reduce the unstable factors brought by building materials. At the same time, in the process of construction, we also need the cooperation of all units to strictly control the quality and put an end to the risk of building quality.

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