The use of cement pipes in our days can not be ignored, from small home decoration to large construction, no matter what kind of use of cement pipes in our current market has become a difficult problem. In particular, the cement pipe products commonly used in home improvement are of varying quality. There are some cases of consumer fraud. This will not only affect the consumer's trust in our manufacturers, but also the quality of our housing construction. The editor of Wanxin will tell us how to choose the appropriate permeable brick.
Different standards of cement have different quality and scope of application. In the face of a wide range of mixed cement products, it is difficult for ordinary consumers to distinguish accurately. Therefore, the selection of cement is like cooking small fresh, or you have to come step by step. First of all, from the appearance of packaging quality. See if the woven bag with good moisture resistance and easy to break is used to see if the logo is clear and complete. Generally, cement produced by regular manufacturers should be marked with the following: registered trademark, place of origin, production license number, performance standard, packaging date, bag gross weight, factory number, cement variety, etc. Residual cement is often unknown. Second, look closely at the color of the cement. Generally speaking, the normal color of cement should be off-white, if the color is too dark or changed, there may be too many other impurities.
Understand the introduction of cement about the ingredients of the merchant to infer the quality of the cement. At present, some small cement factories in China, in order to sell at low prices, violate the cement standards and excessively use cement mixing materials, and do not strictly match the quality of materials in accordance with national standards. Their product performance can be imagined. The regular manufacturers are very careful in the selection of cement materials. At the same time, in production, Lafarge also strictly complies with the national standard to match the materials. After a tight quality control system, the product fully complies with the ISO9000 standard. The four inspections of radon, radioactive substances, chloride ions, and alkali are all better than the national standards.
Ask the cement manufacturer and production process to see if it is regular and the production process is advanced. At that time, most of the cement products on the building materials decoration market were produced by the small vertical kiln process. Not only the quality of the production was very unstable, but also the enemy of environmental protection;
Identify the length of time it leaves the factory. Cement also has a shelf life. Generally speaking, the strength of the cement 30 days after the date of manufacture will decrease. After three months of storage, the strength of the cement decreases by 10% -20%, after six months it decreases by 15% -30%, and after one year it decreases by 25% -40%. Cement that can be used normally should be free from moisture and agglomeration. Use high quality cement to twist cement powder with your fingers and feel fine particles. When the broken cement is packaged, there will be moisture and agglomeration when viewed from the opening. The broken cement is twisted with the fingers and has a rough feel. It shows that the fineness of the cement is coarse and abnormal, and the time-consuming strength is low and the viscosity is poor. .