- 2068 Chaitra · 1 mark
Short note: Granite
Short answer
Granite is a light-coloured coarse-grained plutonic igneous rock with quartz, orthoclase feldspar, plagioclase, and mica or hornblende. Hard (Mohs 6-7), strong (100-250 MPa), low porosity. Used for foundations, dams, aggregate; joints and weathering are problems.
Write a short note on granite.
Granite is a light-coloured, coarse grained plutonic igneous rock of acidic composition. It consists of quartz, orthoclase feldspar, plagioclase and mica or hornblende, in a holocrystalline granular texture. It is massive, hard (Mohs 6 - 7), strong (compressive strength 100 - 250 MPa) and has very low porosity. It is used for foundations, bridge piers, dams, facing stone, kerbs, aggregate and ballast. Weathering to clay and joints are its main engineering problems.
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