水泥管 原材料水泥要做注意事项： Notes for purchasing cement pipe raw material cement:
Home decoration is a common and important event in the lives of ordinary people. As the "basic skin care product" for building a family's living space, home improvement cement, the situation is not optimistic: the product is diverse, the quality is good and bad, and there are two shortcomings ... Once consumers buy defective cement, it will not only affect The decoration quality of the house will also pose a serious threat to human life and health. So, what kind of cement is considered a qualified product?
Different specifications 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 the evaluation of traditional Chinese medicine. The safest way is to choose products from regular manufacturers.
First of all, from the appearance of packaging quality. See if you choose a woven bag with a moisture-proof function that is easy to break and see if the logo is clear and thorough. Generally, the cement produced by regular manufacturers should be marked with the following: registered trademark, place of origin, production license number, performance specifications, packaging date, net weight of the bag, factory number, cement type, 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.
The smell of "smelling" mud analysis is not smelling smell. After all, smelling cement is not safe for consumers. The "smelling" here is "listening". Listening to the merchant's introduction of the cement ingredients to infer the quality of the cement. At present, some small cement factories in China, in order to sell at low prices, violate the provisions of the cement code, excessively use cement mixing materials, and do not strictly perform the ratio of materials and materials in accordance with national standards. Their product functions 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 completely conforms to the ISO9000 standard. The four tests, such as radon, radioactive substances, chloride ion, and alkali, are better than the national standard.
"Ask" the origin of mud is to first ask the cement manufacturer and production process to see if its "origin" 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 small vertical kiln technology. Not only the quality of the production was very unstable, but also the enemy of environmental protection. Some major professional factories chose new dry-type rotary kiln for production and advanced computer technology. Controlling and handling can ensure the stability of cement production quality. For example, Lafarge Cement, the world's first torrent mud manufacturer, uses a five-stage low-heat-consumption, three-wind kiln outside differentiation kiln, and a closed-loop circulation cement mill system equipped with a modern cyclone separator to ensure its output. High quality of cement products.
In this step of "cutting" the mud to know the number of life, the first step is to use fingers to give the cement a "signal pulse" to distinguish the length of its delivery time. Cement also has a shelf life. Generally speaking, the cement that can be used normally should be free from damp and agglomeration. Use high quality cement to twist the cement powder with your fingers and feel fine particles. When the broken cement is packaged, it will be damp and caked when viewed from the opening. The broken cement is twisted with fingers with a rough feel, which indicates that the cement is coarse and abnormal, and has low strength and poor viscosity when used. .