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For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
The constituent of cement which is responsible for all the undesirable properties of cement is
The main constituent of cement which is responsible for initial setting of cement is
Early attainment of strength in rapid hardening cement is mainly due to
Rapid hardening cement attains early strength due to
To retard the initial setting time of cement, the compound responsible, is
The compound of Portland cement which contributes to the strength after two to three years is
In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?
The ratio of sand to gravel in a mixture is 7 : 8 while that between gravel and cement is 6 : 7. What is the ratio of sand to cement in the mixture?
Initial setting time of cement for asbestos cement products should be not less than