The first type: "Wang" mud knows the pros and cons First, look at the quality of the package from the outside. See if you have used a laminated woven bag with good moisture resistance and not easy to break, to see if the logo is clear and complete. Generally, cement produced by regular manufacturers should be marked with the following contents: registered trademark, place of origin, production license number, implementation standard, packaging date, net weight of bag, factory number, cement type, etc. Inferior cement is often unknown. Second, carefully observe the color of the cement. In general, the normal color of cement should be grayish white. If the color is too dark or changes, there may be too many other impurities. The second type: "smell" mud quality The "smell" here is not smelling. After all, smelling cement is not safe for consumers. The "smell" here is "listening". Listen to the introduction of cement ingredients by the merchants to infer the quality of the cement. At present, some small cement plants in China are in violation of the cement standard regulations and use cement mixed materials excessively in order to carry out low-cost sales. The raw material ratio is not strictly in accordance with national standards, and the performance of the products can be imagined. The regular manufacturers are very strict in the selection of raw materials for cement. The cement produced has the characteristics of moderate setting time, high bonding strength and good durability. The third type: "Q" the source of the mud Mainly to inquire about the cement manufacturer and production process, to see whether its "born" is regular, and whether the production process is advanced. At present, the cement products on the illegal building materials decoration market are mostly produced by Xiaoli kiln technology. Not only the product quality is very unstable, but also the enemy of environmental protection. Some professional large factories adopt new dry rotary kiln production and adopt advanced computer technology. Control management ensures the quality of cement products is stable. The fourth type: "cut" mud knows the life This step is mainly to use the fingers to give the cement the "number", to distinguish the length of time it takes to leave the factory. Cement also has a shelf life. In general, the strength of cement that exceeds the factory date of 30 days will decrease. After three months of storage, the strength of cement decreased by 10%-20%, and decreased by 25%-40% after one year. The cement that can be used normally should be free from moisture and agglomeration. The high-quality cement uses fingertips to smash the cement powder and feels the fineness of the particles. Packing inferior cement, the opening inspection will be damp and agglomerated; inferior cement with finger cement powder, there is a rough feeling, indicating that the cement is thicker, abnormal, low strength when used, poor adhesion. Guangdong Jishengke Industrial Co., Ltd. , https://www.suronart.com