Cement is indispensable in construction, as it has strength, withstands the pressure of overall structures. Just on this basis, the cement of several brands are distinguished, which indicate the letter M and a certain digit. The figure indicates how many kilograms can withstand 1 kV. cm of finished cement or concrete. For Portland cement, the most common are brands such as M500 cement in bags, M-400, M-550, M-600.This material with an indicator of 600 and above is used for the construction of military facilities.
600 and above
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