• SHAIK INTHIYAZ
• U.V.Narayan rao

A huge amount of solid concrete waste is generated annually from construction and demolition activities. This has led to the promotion of reusing of recycled concrete aggregate (RCA) or recycled aggregate (RA) as a major measure to reduce waste and to mitigate the harmful effects of construction activities on the environment. In this paper, strength characteristics of high volume fly ash (FA) based concrete with recycled aggregate of 350 kg /m3 for 0.45 and 0.50 water cement ratios were studied. Natural aggregate (NA) was replaced with recycled aggregate (RA) in different percentages of 30, 40 and 50 % (by weight). Similarly, the amount of cement was also replaced with fly ash in different percentages such as 40, 50 and 60 % (by weight). The properties of concrete evaluated are compressive strength and split tensile strength. All properties are measured at 3,7,28 and 56 days. The mix combination with 50% FA and 40% RCA gives higher and 3 % excess compressive strength then conventional concrete for 0.45 water cement ratio at 28 days. The mix combination with 50 % FA and 30 % RCA gives 19 % excess split tensile strength when compared with conventional concrete for 0.50 water cement ratio at 28 days. Hence, these mix combinations can be adopted for an economical concrete containing required characteristic strength.

concrete, fly ash,recycled aggregate,compressive strength,split tensile strength

"Study the Properties of High Volume Flyash concrete containing Recycled coarse aggregate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 9, page no.253-263, September-2017, Available :http://www.jetir.org/papers/JETIR1709044.pdf

"Study the Properties of High Volume Flyash concrete containing Recycled coarse aggregate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 9, page no. pp253-263, September-2017, Available at : http://www.jetir.org/papers/JETIR1709044.pdf