Quality characteristics of cement and its use in construction
In the construction of cement is used in the preparation of construction solutions, and also to strengthen the quality of other substances.
Cement mixtures are hydraulic powder binding. They gain their strength and harden only if there is water in the solution. Immediately, after cooking or soon, during the laying of concrete, not spray with water, then the concrete structure can quickly destroy. Such a fate awaits concrete if it has quickly dried in the sun. Such a reaction is possible for the reason that when the concrete did not receive a sufficient amount of water, when setting it will be fragile.
In addition, cement should be small grinding to relate to the category of high quality. The higher the quality, the less grinding and vice versa. Small grind cement is necessary for special storage conditions. The solution is cemented after preparing it after 45 minutes. The cement solution completely hardens 10-12 hours after its manufacture. It acquires loot stability (under normal conditions) only 28 days after its laying. By the brand of cement, we can determine what effort should withstand the cement at the end of the full setting deadline (28 days). Such an experiment is used in order to set the strength of cement. A cube is made from the mass of cement mortar, it is withstanding it for 28 days, after which I check the cube for compression.