The volume of concrete is easy to calculate, but the volume of cement is not. So the mass ratio is more used in the production of concrete, and the mass ratio of all materials in a certain amount of concrete unit volume is very intuitive. You can know the input quantity of all materials without any conversion.
For example, C30 concrete has the following proportions: cement 220, mineral powder 70, fly ash 70, sand 800, stone 1040, water 175, and a certain amount of additives, all of which are kg/ m3. Among them, the admixture is special, which is generally expressed by the dosage.
The reference object is the quality of the total rubber material. For example, the dosage of 2.0% means that the dosage is 2.0% of the total mass of adhesive, and the mathematical formula is: dosage = mass of adhesive *0.02.
Extended data:
Precautions:
1, whether the ground is flat or not. You can use a 2-meter ruler to carry out carpet measurement on the house (the same position needs horizontal measurement). If there is a gap greater than 3mm below the guide rule, it means that the ground is uneven, otherwise it means that it is basically flush.
2. When installing the floor on the uneven ground, there will be problems such as empty sound, broken lock and feeling like a seesaw. Therefore, whether you install solid wood floor, laminate floor or laminate floor in your home, make sure that the floor in the installation area is flat before installing the floor, otherwise the floor will be flat before acceptance.
3. The balcony floor does not need to be flush with the living room and bedroom. Under normal circumstances, the balcony floor will be lower than the indoor floor to prevent the balcony from accumulating water.
4, kitchen and bathroom, the floor of the living room does not need to be flush with the living room, the floor of the kitchen and bathroom is easy to store water, usually lower than the living room floor.
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Baidu Encyclopedia-Cement Content