Effect of Recycled Coarse Aggregate on the Fresh and Hardened Properties of Concrete

Recycled Coarse Aggregates (RCA) are consists of crushed concrete, inert particles developed from the materials that have been previously used in the structural constructions and demolition debris. The main objective of this thesis is to determine the strength characteristics of the recycled coarse aggregates for the application in the high strength structural concrete (HSSC), which will offer an improved understanding on the properties of concrete with recycled aggregates, as an unconventional material to coarse aggregate i.e. natural aggregate in structural concrete. The main objective of this thesis is to determine and compare the strength of concrete by using different percentage of the recycled aggregates. Recycled Coarse Aggregate is furthermore the type of artificial aggregate which is extracted from the Construction and demolition wastes. The Constructions and demolitions are processes that go one after the other. The demolished building aggregate in India normally goes to waste in land filling operation. Recycling of these waste materials from building demolition can supply a better solution to this problem. The research investigation was carried out using the sieve analysis test, Specific gravity test, Water absorption test, Aggregate Impact Value (AIV) test, Crushing value test, Workability test (Slump cone test) and compressive strength test. There were total of five batches of concrete mixes, consisting of every 25% increment of recycled aggregate replacement, from 0 % to 100 % i.e. 0%, 25%, 50%, 75% and 100%.