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The concrete having bulk density between 5 kN/m^3 to 18 kN/m^3 is known as _________(a) Coloured concrete(b) Lightweight concrete(c) No-fines concrete(d) Heavyweight concreteI have been asked this question in class test.My doubt stems from Different Types of Concrete in portion Cement Concrete Construction of Construction & Building Materials

Answer»

The correct choice is (b) Lightweight CONCRETE

To explain: The lightweight concrete is highly POROUS and hence, it leads to the CORROSION of reinforcement, if not PROPERLY protected. For lightweight concrete, the LOOSE porous materials are used as aggregates.



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