Many people know that cement is an important building material, but they don't know what kind of cement to buy when they buy it, because there are many kinds of cement. So what kinds of cement are there? Today, Bian Xiao will tell you about the knowledge of cement varieties.
What kinds of cement are there?
Common cement varieties can be classified into five types, namely, portland cement, ordinary portland cement, slag portland cement, pozzolanic portland cement and fly ash portland cement, among which portland cement is the most common. The main component of this cement is calcium silicate, and the secondary component is gypsum.
2. What are the labels of cement?
There are many kinds of cement labels, and the following six are common, namely, 225, 275, 325, 425, 525 and 625.
Among these six grades, the strength of cement No.625 is the highest, and the Mpa value is between 3.4 and 8.
Three, rural housing with 325 cement or 425 cement?
In terms of strength, it is definitely better to choose 425 cement, because the strength grade of 425 cement is higher than that of 325 cement. However, because the floors of houses built in rural areas are not very high, only two or three floors, the 325-grade cement can fully meet the standard requirements of housing quality. In terms of price, 325 grade cement is more suitable for ordinary people because it is cheaper than 425 grade cement. If the builder is relatively rich and completely economical,
IV. Application Scope of No.325 Cement and No.425 Cement
Grade 325 cement is generally used to paint indoor walls and buildings with lower floors. Grade 425 cement is generally used for piling bridges, roads and foundations.
Verb (abbreviation of verb) The difference between No.325 cement and No.425 cement
1, No.325 cement is softer than No.425 cement.
2, 325 cement compressive value in 32.5Mpa；; The compressive strength of 425 cement is 42.5Mpa.
3, indoor general use 325 cement; Grade 425 cement is generally used outdoors.
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