A Study On The Compressive Strength Of Concrete Using Construction Demolition Waste (CDW) As Partial Replacement For Coarse Aggregate.

Abstract

Nowadays, concrete construction is becoming very much complex. Everyone try to build cost effective and durable structures. So many experimental works have been performed to gather both of these quality by determining the compressive strength of concrete. The objectives of our study is to find the difference between the values of compressive strength of concrete by using two different types of coarse aggregate. The materials used for the experiment are new normal black stone, construction and demolition waste, sylhet sand and water. Concrete prepared with the ratio of 1:2:4 and water cement ratio was 46%. From fluid construction we know that, M15 grade concrete with mixing properties ratio of 1:2:4 and w/c ratio of 45%, the value of compressive strength is 15 MPa or N/mm2 . [1] From the experiment, For N-100%, compressive strength is almost accurate For N-70% and W-30%, compressive strength is almost 8% less than normal concrete. For N-50% and W-50%, compressive strength is almost 20% less than normal concrete. For N-30% and W 70%, compressive strength is almost 27% less than normal concrete. For W-100%, compressive strength is almost 25% less than normal concrete. So, for cost saving, environmental health and for reuse of Construction and Demolition waste, this experiment will help us for construction management.