STUDY ON STRENGTH CHARACTERISTIC OF CONCRETE MASONRY UNITS USING RECYCLED CONCRETE AGGREGATES

Recycled aggregates are comprised of crushed, graded inorganic particles processed from the materials that have been used in the constructions and demolition debris or any type of concrete waste. In the present work it is decided to determine the strength characteristics of concrete masonry units using recycled aggregates as an alternative material to natural coarse aggregate and fine aggregate. The investigation has been carried out for concrete blocks by compressive strength test, water absorption, block density etc. A total of five batches of concrete mixes consist of every 25% increment of recycled aggregate replacement from 0% to 100%. The results shows that all of concrete waste mixtures can be used to produce concrete blocks but 75% replacement shows a very good strength and cost can also be reduced to 35-40% of original cost.