Mastic asphalt is

The rocks formed from molten magma, are called

Lime putty

Minimum required water cement ratio for a workable concrete, is

The PVC doors and windows are preferred as they are

Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as

The kiln which may work throughout the year, is

Mild steel is used for

The rocks having alumina or clay as their major constituents, are known as