Published Paper Details:

In Design of concrete structures, light weight concrete plays a prominent role in reducing the density and to increase the thermal insulation. In this experimental study, studied on the durability properties of lightweight concrete M-40 using crushed AAC blocks a lightweight aggregate as partial replacement of coarse aggregate has been carried out, by focusing on its ability to reduce dead load without significant reduction in compressive strength. For this study four concrete mixes marked as M-1, M-2, M-3 and M-4 were prepared with different replacement ratios (0, 10, 15 and 20 percent) of crushed AAC blocks with coarse aggregate and check the compressive strength after 7, 28 and 56 days of curing period. The test results shows that, AAC blocks replace by 10%, and 15% ,the compressive strength initially increases by is 4.34%, 12.12% and 11.28% and 1.1%, 2.13% and 0.77% respectively at 7days, 28 days and 56 days of curing period. At 20% replacement of crushed AAC blocks, compressive strength is going to decrease by 3.43%, 4.42% and 1.3% respectively at 7days, 28 days and 56 days of curing period. However, the strength of M-40 is achieved at 15% of optimum replacement of normal weight aggregate by crushed AAC blocks. Also the unit weight of cube specimens decreases by 5.16% with 15% replacement of normal weight aggregate with lightweight aggregate.