Self Compacting Concrete By Partial Replacement Of Cement With Fly Ash & Coarse Aggregate With Recycled Coarse Aggregate

  Emmidi Rama Guravaiah,  P. Sowjanya

Concrete is one of the oldest and most common construction materials in the world mainly due to its availability, low cost and durability. Due to advancing technology the most revolutionary development in concrete technology was self-compacting concrete. It was first developed in Japan in the year 1980. The modern application of SCC is focused on high workability, high performance, high strength, long durability, uniform surface structure and fast construction. SCC is the high workable concrete, will flow like water, so that placing of concrete is easy than the normal concrete. The best architecture can be made by SCC. In recent years demolition of structures has led to increase in construction waste. So, in this project the properties of SCC with partial replacement of cement with fly ash and Coarse aggregate with recycled (demolished) aggregate results are compared with the normal SCC. Cement is partially replaced with Fly ash and NCA (natural coarse aggregate) is partially replaced with RCA (recycled coarse aggregate) by an amount of 20%, 25%, 30% and 35%. The effect of RCA on the properties of SCC in green state (i.e. slump flow test, T50 slump flow, L-box test, J-ring test & U-box test) and also properties of concrete in harden state (i.e, compressive strength, flexural strength and split tensile strength) are studied. The mix design was carried out for M30 grade of concrete; here fly ash (mineral admixture) is added to improve the quality & durability and the new generation super plasticizers like Polycarboxylated Ether and Master Glenium-51 are particularly used as the chemical admixtures.

Keywords- SCC, RCA, Fly ash, Mix design, slump flow, J-ring, L-box, U-box, Compressive, Split tensile, & Flexural strength etc

Unique Identification Number - IJEDR1903134
Page Number(s) - 772-779
Pubished in - Volume 7 | Issue 3 | September 2019
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Emmidi Rama Guravaiah,  P. Sowjanya,   "Self Compacting Concrete By Partial Replacement Of Cement With Fly Ash & Coarse Aggregate With Recycled Coarse Aggregate", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.7, Issue 3, pp.772-779, September 2019, Available at :http://www.ijedr.org/papers/IJEDR1903134.pdf