BUILDING MATERIALS & CONSTRUCTION
3.Available in red, yellow grey, blue and greenish black colour 4. Specific gravity is 3 and compressive strength varies 1530 to 1890 kg/cm2. 5. Used for ornamental, rail road ballast, aggregates for concrete etc. 1.4.3 Sand Stone: 1. Sedimentary rock 2. It is available in variety of formations fine grained, coarse grained compact or porous 3.
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