1, see whether the factory certificate of block brick is consistent with the physical object and the testing center, and show whether the factory certificate is stamped by the inspection department and signed by relevant personnel. Moreover, all the bricks resold in the market now have test reports, which list the test numbers and relevant information of the laboratory. If the merchant can't provide such information, it means that the product has quality problems.
2. When buying block bricks, be sure to carefully check the measured specifications and values in the block brick test report. In addition, the commodity inspection may also be required to show the as-built drawings, negotiation records, quality acceptance records, technical disclosure, engineering organization design and other relevant certificates of block bricks. Not only that, but also pay attention to whether the test report and certificate are consistent with the actual parts and projects, and also correspond to the engineering data one by one, so as to ensure the quality of block bricks.