Question

a) Give the physical classification of rocks.
b) Define the different methods of quarrying of stones, detailing the blasting process.

c) Briefly describe sieving of aggregates, giving its significance.

Answer 1

Answer:

We take many things in the material world for granted, not realising or appreciating their presence or value. Construction materials that make up the material world around us come into this unconscious, "invisible" category. Though you see buildings, roads, footpaths and bridges every day, it's almost certain that you have never thought about what the materials are, what they are made of, or where they come from. The vast bulk of our built environment is formed from raw materials won from the earth by the extractive industries. Without the raw materials with which to build houses, hospitals, schools, factories, roads, etc., life would certainly be more basic and less comfortable than we presently experience.

Stone quarrying is the multistage process by which rock is extracted from the ground and crushed to produce aggregate, which is then screened into the sizes required for immediate use, or for further processing, such as coating with bitumen to make bituminous macadam (bitmac) or asphalt.

Answer 2

Answer:

B. Define the different methods of quarrying of stones, detailing the blasting process