"Look, smell, ask, cut" - buy cement four steps

Different standards of cement, quality and scope of application are different, in the face of a wide variety of mixed-living home improvement cement products, the average consumer is difficult to accurately identify: the choice of cement is like Chinese medicine pulse, not to worry, step by step. The safest way is to choose the products of regular manufacturers.

Conch Cement (Yan Shao) Elephant Cement

The first step: "look at" mud known good and bad First of all, from the appearance of the packaging quality. To see if the use of a damp-proof performance is not easy to damage the laminating woven bags to see if the logo is clear and complete. In general, the cement produced by regular manufacturers should be marked with the following contents: registered trademarks, place of origin, production license number, implementation standards, packaging date, bag net weight, factory number, and cement varieties. However, poor quality cement is often unknown.

Second, carefully observe the color of the cement. In general, the normal color of cement should be grayish, and the color is too deep or there may be too much other impurities.

The second step: "smell" muddy quality The smell here is not a smell. After all, it is unsafe for cement to smell to the consumer. Here the "smell" is "hear" and listen to the introduction of the ingredients of cement, so as to infer the cement. Quality. At present, some small cement plants in China have used cement mixing materials in excess of cement standards in order to carry out low-priced sales, and have not strictly followed the national standards to match the raw materials. The performance of their products can be imagined. The regular manufacturers are very rigorous 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 step: “Asking” the source of mud is mainly to inquire the manufacturer and production process of cement to see if its “origin” is formal and whether the production process is advanced. At present, the cement products on the building materials decoration market are mostly produced by the small vertical kiln process. Not only the product quality is very unstable, but also the enemies of environmental protection; and some professional large plants adopt the new dry process rotary kiln production and adopt advanced computer technology control. Management can ensure the stability of the cement product quality.

Step 4: “Cut” the life of the mud The main step is to use the fingers to give the cement a “pulse” and identify 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 delivery date of 30 days will decrease. After three months of storage, the strength of cement decreased by 10%-20%, decreased by 15%-30% after six months, and decreased by 25%-40% after one year. The cement that can be used normally should not be subject to damp and agglomerate, and the high-quality cement should be cement powdered with a finger and feel fine grained. Packing of poor quality cement will result in moisture and agglomeration of the opening inspection. The inferior cement is cemented with fingers and has a rough feel. This indicates that the fineness of the cement is coarse and abnormal, and the strength of the cement is low and its viscosity is poor.

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