Properties of adjusted density high-performance concrete

Taylor & Francis Group
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Lyte M and Sri Ravindrarajah Rasiah 2009, 'Properties of adjusted density high-performance concrete', , Taylor & Francis Group, London, UK, , pp. 351-355.
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Lightweight expanded polystyrene, a well known material to absorb impact energy, is being used to produce adjusted density concrete having enhanced impact energy absorption capacity concrete. Two structural concrete grades, 30 and 45 MPa, normal weight concrete and lightweight polystyrene concrete were tested for their impact response under 75 kg weight test through 462 mm drop. The impact response of concrete was monitored through load-time plot. Peak load and contact time are considered as important measurable quantities in identiâ¿¿ing the energy absorbing capacity of concrete. The results showed that for a given structural grade the concret&containing expanded polystyrene aggregate out-perfonned the normal weight concrete in its impact resistance. Under the tested impact loading condition, polystyrene concrete having the compressive strength of 30 MPa showed 28% increase in the contact time and 18% reduction in the peak load compared to the similar grade normal weight concrete.
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