• A.Vasudev
• Sri.V.K.VISWESWARA RAO

Lightweight aggregate concretes can be used in structural applications, with strengths equivalent to normal weight concrete. The main benefit in using this lightweight concrete is, it helps in reduction of self-weight or dead loads of a structure. The present study is to achieve high strength lightweight concrete by using lightweight expanded cay aggregate (LECA). In this study LECA is used in concrete as both coarse and fine aggregate and also in combinations with normal weight aggregates. Density of concrete is the main criteria in designating the type of concrete. The density of lightweight concrete is to be in range of 1120 kg⁄m^3 and 1910 kg⁄m^3 . Three mixes i.e, all lightweight aggregates and combination of lightweight aggregate with normal weight aggregates are prepared. Additional mixes are prepared by replacing 10% silica fume with cement and 2% steel fibers to weight of cement to the above three mixes. Mechanical properties are evaluated to the mixes. The maximum compressive strength of 68 Mpa is achieved to the mix containing the combination of lightweight fine aggregate(LWFA) and normal weight coarse aggregate (NWCA) in the addition of 10% silica fume and 2% steel fibers at 28 days.

Lightweight aggregate , High strength, LECA, Silica fume, Steel fibers

"STUDY ON MECHANICAL PROPERTIES OF FIBER REINFORCED HIGH STRENGTH LIGHTWEIGHT CONCRETE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.749-753, August-2018, Available :http://www.jetir.org/papers/JETIRA006132.pdf

"STUDY ON MECHANICAL PROPERTIES OF FIBER REINFORCED HIGH STRENGTH LIGHTWEIGHT CONCRETE", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp749-753, August-2018, Available at : http://www.jetir.org/papers/JETIRA006132.pdf