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Sunday, 17 February 2019

Building stone Basalt and Trap

Basalt and Trap: The structure is medium to fine grained and compact. Their color varies from dark grey to black. Fractures and joints ar common. Their weight varies from eighteen kN/m3 to twenty nine kN/m3. The compressive strength varies from two hundred to 350 N/mm2. These ar igneous rocks. they're used as road metals, aggregates for concrete. they're additionally used for trash masonry works for bridge piers, watercourse walls and dams. they're used as pavement.

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