• Mudireddy Sreenivasula Reddy
• P.Sri Chandana

Concrete is most widely used constructed material all around the world. The main constituents are cement,fineaggregate,coarse aggregate and water. Increase in construction activities have led to an increase in demand for the various raw materials in concrete.Natural sand is most commonly used fine aggregate in concrete.Increasing construction activities requires production of more and more quantity of concrete, which needs more and more natural sand and coarse aggregate. Owing to acute shortage in many areas, cost and environmental factors, an alternative for the same is pondered. The use of stone dust in concrete as partial replacement of fine aggregate will be an alternative material instead of conventional fine aggregate. This will results in conservation of natural resources upto some extent, besides helping in environment protection and disposal of stone dust in abundance.Use of stone dust in concrete not only improve the quality of concrete but also conserve the natural river sand for future generations. The use of large quantity of cement results in increasing CO_2 emissions and as a consequence of the green house effect. One of the methods to reduce the cement content in concrete mixes is the use of pozzolanic materials. Metakaolin is a supplementary cementitious material with pozzolanic and micro filler characteristics. In the present study stone dust is used as partial replacement of fine aggregate by weight at varying percentages i.e.30%, 60%, 100% respectively. Metakaolin is used as partial replacement of cement by weight at varying percentages i.e. 10%, 15%, 20% respectively. The combined influence of Stone dust and metakaolin on compressive strength, split tensile strength, flexuralstrength and modulus of elasticity of M30 grade of concrete is investigated. The test results of concrete prepared using different combinations of stone dust and metakaolin are compared with that of controlled concrete. A considerable increase in compressive strength, split tensile strength, flexural strength and modulus of elasticity of concrete by using stone dust and metakaolin is observed compared to control concrete.The maximum strength characteristics of concrete are obtained at 15% replacement of cement with metakaolin and 60% replacement of fine aggregate with stone dust.

natural sand, concrete, stone dust, partial replacement, compressive strength.

"AN EXPERIMENTAL INVESTIGATION ON THE STRENGTH PROPERTIES OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH METAKAOLIN AND FINE AGGREGATE WITH STONE DUST", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.169-174, January-2019, Available :http://www.jetir.org/papers/JETIR1901821.pdf

"AN EXPERIMENTAL INVESTIGATION ON THE STRENGTH PROPERTIES OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH METAKAOLIN AND FINE AGGREGATE WITH STONE DUST", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp169-174, January-2019, Available at : http://www.jetir.org/papers/JETIR1901821.pdf