When it comes to architecture, there is a lot of knowledge that we should learn and understand. You should have paid attention to this information. In order to let everyone know more about the relevant content, the enthusiastic editor has summarized it here. Can 425 cement be used to pour floors? For an explanation of this question, friends who want to know quickly come and find out. Please keep an eye out and learn more about how to quickly understand the quality of cement. We believe that you will find useful information in the future after reading the following information. Let’s take a look at the detailed introduction!
425 Cement Can the floor be poured?
1. When the design grade of floor concrete is C30, grade 32.5 cement cannot be used because the amount of cement in the mix ratio is too large, which often hardens and shrinks greatly, and cracks are prone to occur.
2. When the floor concrete design grade is C25, it is possible, but not very appropriate;
3. When the floor concrete design grade is C20, you can rest assured to press the match button Than using 32.5 grade cement.
4. No. 425 cement can be used for cast-in-place floors. According to Residential Online, No. 425 cement has a high grade and a fast hardening time, so it has a longer service life for the floor.
How to quickly understand the quality of cement
1. Because cement is afraid of moisture, good cement will be packed in moisture-proof laminated woven bags, and the trademarks and words on them will be It is very clear, and the content includes brand, origin, trademark, grade, type, production date, etc., all of which are indispensable.
2. Most owners have no experience in this area when purchasing cement, so they must listen carefully to the merchant’s explanation, especially the cement ingredients, which are the key to determining the quality of cement. If you do not know the standards Consumers with matching ratios can check directly online.
3. There are a lot of cements on the market. If consumers want to buy high-quality products, they must learn how to deal with merchants. First, brand dealers must have a letter of authorization, and secondly, the product production process. Although I don’t know, but I can get information from the merchant’s description.
4. Residential Online learned that under normal circumstances, the shelf life of cement is about three months, but in fact cement is a fragile product. The strength of cement with a production date of more than one month will decrease. The longer the time, the greater the decline, so when purchasing, the earlier the production date, the better.
Is it good to mix cement?
1. During construction, it is generally not allowed to mix cements of different grades, nor is it advisable to mix cements of different brands. For example, if you mix 325 and 425 cement, or mix 42.5 and 32.5 cement of the same variety, you can only use it according to the cement index of 32.5. The strength grade, setting time and other properties of the mortar need to be tested to determine, and the design requirements cannot be guaranteed. If different types of 325 and 425 cement are mixed, flash setting or rapid setting of the mortar will easily occur, and the concrete will easily crack due to different setting periods.
2. In addition, when mixing cement, water and sand need to be added in proportion. The added water should not contain organic matter, so as not to affect the setting time of the concrete, thereby affecting the strength of the concrete. When pouring the cement mixture, there should be no leakage of slurry, reasonable vibration, and subsequent maintenance work.