Light weight concrete IS 6598

For thermal insulation purposes some times light weight concrete is provided above roof to minimise temp inside building. Its done by 33 grade cement, mixing of foaming agents in concrete to increase its vol.The roof waterproofing work includes Cast-in-situ light weight concrete (Type – A) as per IS 6598, formed by producing gas or air bubbles in cement slurry or a cement-sand slurry. The material cured under natural conditions. i.e. under ambient temperature. The material shall have a density of 320 Kg/Cu.m. Compressive strength of minimum 0.25 N/mm 2 value of thermal conductivity of maximum 0.7 mw/cm. 50 °C mean temperature. 

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