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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
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?
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
The compound of Portland cement which contributes to the strength after two to three years is
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
As compared to ordinary portland cement, high alumina cement has
As compared to ordinary portland cement, use of pozzuolanic cement
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is