EXPERIMENTAL INVESTIGATION AND MECHANICAL PROPERTIES OF PARTIAL REPLACEMENT OF FINE AGGREGATE BY CRUSHED SEASHELL IN THE PRODUCTION OF M25 GRADE CONCRETES. PRAKASH CHANDAR, DEEPAK MOHAN NAMBIAR, K. KALAIVENDHAN, V. KALPANA PRIYA, N. NASURUDEEN SHA, C.G. RITHICK AND M. VISHNUVARATHAN
For the construction of the building the maximum required material is concrete. Concrete is the mixture of cement, fine aggregates, coarse aggregates and water. Concreting is the easiest and fastest way of construction. On the other hand there is an increase in cost due to depletion in natural resources. Due to lack of resources many construction companies are facing the consequences,mainly in fine aggregates. As river sand is mostly used in construction, now there is a great demand for river sand and more over digging of river sand is strictly prohibited in many areas. So it became a hard thing to get river sand at cheaper rate. Many alternatives have been exercised to counter act this problem. Considering this as a major problem, we began our project by using crushed seashell. In this project we replaced fine aggregates with the ground sea shell in the range of 0%, 20%, 40%, 60%, 80% using M25 grade of concrete. Sieve analysis is also performed for crushed sea shell and coarse aggregates. The prepared concrete mix is compared and test in terms of compressive strength, tensile strength and flexure test to conventional concrete. The test was performed at 3, 7 and 28 days in order to evaluate the strength properties.
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