When we are decorating, we will have to buy cement or listen to workers discussing what brand of cement to buy. Then you must be puzzled. In fact, the cement number is not difficult to understand. Then Xiaobian collected some information for everyone to specifically answer questions on this issue.
| What does the cement label affect? |
1. The cement label contains the strength of cement after solidification
This strength includes the compressive strength and tensile resistance of the cement after solidification. The higher the cement number, the greater the two intensity values. The smaller the contrary.
2. The cement label contains the speed of cement solidification
The cement label also means the speed at which the cement solidifies. General emergency engineering and underwater engineering, such as waterways, bridge piers and other buildings, must require a short solidification time, the use of fast-hard cement such as 700, 800 is better. The construction of walls, floors, and other construction projects requires less solidification time and requires a slower solidification rate of cement.
| What are the cement labels? |
The cement number is an indicator of the "strength" of the cement. The strength of cement is the size of the force per unit area. It refers to the firmness of the cement after it is mixed with water, and the degree of solidification after consolidation and hardening (the strength of the cement and the mineral composition of the cement, the particle fineness, the temperature at the time of hardening, the humidity, and The proportion of water in cement is related to factors such as). The strength of cement is an indicator to determine the cement label, and it is also the main basis for selecting cement.
1. The strength grade of Portland cement is divided into six grades: 42.5, 42.5R, 52.5, 52.5R, 62.5 and 62.5R.
2. The strength grade of ordinary Portland cement is divided into four grades: 42.5, 42.5R, 52.5, and 52.5R.
3. The strength grades of slag portland cement, pozzolanic portland cement, fly ash portland cement, and composite portland cement are classified into three grades: 32.5, 32.5R, 42.5, 42.5R, 52.5, and 52.5R. .
| Is the higher the cement number the better? |
Seeing here, some people may ask, since the higher the cement number is, the higher the strength is, the shorter the solidification time is. In the decoration, the higher the cement number, the better. There are also many owners who see the decoration in the decoration. The list issued by the company read "325 cement," thinking that the label is too low and firm. A senior industry official said that in fact, the cement number is not the higher the better, choose different grades of cement, in addition to considering the price factor, but also consider the use of cement.
1. Price. The larger the number of cement, the better the compressive strength and tensile strength, the more complex the construction requirements, and the higher the price. When decorating, it is better to budget money and spend money on it.
2. Use. Each cement label has its scope of application, and it cannot be simply understood that the higher the better. Like 525 cement is not suitable for masonry wall, more used for flooring. Although the strength of 525 cement is greater, but also dry faster, especially in the current high temperature environment in the heat, if used for wall, the probability of wall cracking will be higher; on the other hand, the masonry wall is also not forced Wall, so 325 or 425 cement can meet the needs of the pre-decoration.
Summary: After reading these explanations on the cement label, we also have a certain understanding of these, of course, if it is not their own decoration will not touch these, but after knowing these will also increase their knowledge, I hope this article on You are useful.
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