• KOLERI SASIDHAR
• K. Chandrasekhar Reddy

In concrete, fine and coarse aggregates are major ingredients and are generally occupy 60 to 80% of the total volume of concrete. Huge demand, depletion and environmental issues of natural sand has resulted to identify substitute material to natural sand as fine aggregate. Concrete made with properly graded aggregates exhibits high workability, density, strength, durability and lower shrinkage. In the present experimental study, the durability strength tests were conducted on the concrete mixtures prepared with Manufactured sand (M-sand) and Quarry dust at varying proportions used as full replacement for natural sand and 20 mm coarse aggregates are partially replaced with 12 mm and 6 mm aggregates at different proportions to obtain better gradation. The experiments were conducted on M20 design mix concrete proportions of 1:2.288:4.039 with a total of 99 specimens. To study the effect of sulphuric acid attack, the test specimens were casted. For the first 28 days, the specimens were cured in potable water. After 28 days curing, cube surfaces were cleaned and weighed. The identified specimens were then immersed in 5% H2SO4 (sulphuric acid) solution for 90 days. The experimental results showed that, the loss of compression strength is achieved at the proportions of fine aggregate (90% of M-sand and 10% of quarry dust) and coarse aggregate (65% of 20mm, 15% of 12mm and 20%of 6mm aggregate).

Manufactured sand, Quarry dust, Aggregates, Design mix, Acid attack, Strength

"Durability Study on Properties of Concrete by Replacing Natural Sand with M-Sand & Quarry Dust at Different Sizes of Coarse Aggregate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.56-60, March-2019, Available :http://www.jetir.org/papers/JETIR1903111.pdf

"Durability Study on Properties of Concrete by Replacing Natural Sand with M-Sand & Quarry Dust at Different Sizes of Coarse Aggregate", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp56-60, March-2019, Available at : http://www.jetir.org/papers/JETIR1903111.pdf