For railway ballast, the stone should be

A first class brick should not absorb water more than

The strength of timber is maximum in the direction

The rapid hardening Portland cement has a

According to Indian standard specifications, the concrete should be cured under a humidity of

The moisture content in timber for framework should not exceed

The rate of hydration and hydrolysis of cement depends upon its

Argillaceous rocks have their main constituent as

Enamel paint is made by adding