• Vinay K

The study aimed at investigating the structural use of recycled coarse aggregate by studying the strength characteristics of Recycled Aggregate in concrete and appropriate percentage of fly ash is used for the replacement of conventional cement. The laboratory experimental work has been conducted to determine the strength characteristics of concrete by replacing recycled aggregates and fly ash in different percentages. To calculate mix design of concrete for required design strength we have to determine the physical, chemical properties of cement, coarse, fine, recycled aggregates and fly ash. The total laboratory experiments are conduced according to standard and codal provisions; mainly Indian Standard Specifications are followed. On the basis of the laboratory studies carried out on M30 grade (the mix design calculated as per the IS: 10262-2009) recycled aggregate concrete. By observing the experimental results, we can conclude that the strength results of recycled aggregate concrete comparing to conventional concrete are increased when fly is added as 10% replacement of conventional cement, and without fly ash it is decreased. Hence for economical view 10% of fly ash is added is preferable and in the perspective of compressive strength, split tensile strength, flexural strength 10% is suggested. At 50% replacement of coarse aggregate with recycled aggregates the results are not even met half of design strength Thus, 10%-40% replacements recycled aggregates recommended for ordinary building and works special concrete production.

Recycled aggregate, fly ash, strength properties, cement concrete, partial replacement

"STUDY OF STRENGTH CHARACTERISTICS OF CONCRETE USING RECYCLED AGGREGATES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 12, page no.1034-1039, December-2017, Available :http://www.jetir.org/papers/JETIR1712143.pdf

"STUDY OF STRENGTH CHARACTERISTICS OF CONCRETE USING RECYCLED AGGREGATES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 12, page no. pp1034-1039, December-2017, Available at : http://www.jetir.org/papers/JETIR1712143.pdf