The art of construction with stones and mortar is known as stone masonry. Stones when created by breaking rocks are very irregular in shape and size. Quarries, from where rocks are taken out by blasting or other means provide this natural material for construction Purposes. Other stones, known as boulders, are collected from river and stream beds or dislodged from earthen mountains are also used in construction work. These may be used in their natural form or broken into handable sizes for construction purposes. Small bebbles and crushed boulders form the stone ballast or coarse aggregate in forming cement concrete.
Cutting of stones, giving them semi-finished or finished regular even size shapes give them the following type of masonry classitications:
1 Random Rubble Masonry
2 Uncoursed Random Rubble Masonry
3 Coursed Random Rubble Masonry
4 Ashlar Masonry
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