Build a solid foundation: the way to test the quality of raw materials of PSPC wall panels
Publish Time: 2024-11-27
As a key component of the facade of modern buildings, the quality of PSPC wall panels is closely related to the quality of raw materials. Strict and scientific testing procedures are the primary checkpoint for quality control.For the concrete raw materials that constitute the "skeleton" of wall panels, cement is the core testing object. First, its strength grade is tested. According to national standards, standard specimens are used to pressurize at a specified age (3 days, 28 days) by compression and flexural testing machines, and compared with the established strength indicators. If they do not meet the requirements, the bearing capacity and durability of the wall panels will be reduced. Stability testing is also indispensable. The Ray's clamp method or the test cake method can check the volume stability problems of cement caused by excessive free calcium oxide, etc., and prevent cracks in wall panels.Aggregate quality control is also critical. The screening test clarifies the particle grading of coarse and fine aggregates. Reasonable grading ensures that the concrete is dense and has excellent strength. The mud content and mud block content are determined by washing and screening methods. High mud content will weaken the bond between aggregate and cement and affect the integrity of the wallboard. The content of needle-like particles should not be ignored. Excessive content will reduce the fluidity and strength of concrete. It can be accurately identified by tools such as gauges.The addition of admixtures is aimed at optimizing the performance of concrete. The water-reducing agent detection focuses on the water reduction rate. According to the standard concrete mix ratio, the water consumption of the water-reducing agent and the water-reducing agent is compared. If the standard is not met, it is difficult to improve the workability of concrete. The retarder checks the setting time, controls its delaying effect, and prevents abnormal setting during wallboard construction. Through chemical analysis, net slurry fluidity and other multi-factor tests, the homogeneity and effectiveness of the admixture are verified.The detection of finishing materials has unique points. The water absorption rate of ceramic thin plates is checked and determined by water immersion method. High water absorption is easy to cause discoloration and hollowing. The radioactivity of stone thin plates is measured, and the release of radioactive elements such as radon is monitored by gamma spectrometers. Exceeding the standard will endanger the health of residents. Metal sheets are corrosion-resistant, and salt spray tests simulate harsh environments to observe the degree of rust. The wall panels are long-lasting, beautiful, and stable.Focusing on the "health" of each raw material from the source, through rigorous testing processes, a solid quality foundation is built for the PSPC wall panel, supporting the quality of the building.
