• Bhavana Jadhav
• DR. SANJAY KULKARNI

Concrete is most important material used in the construction industry. Large amount of natural aggregates were used in concrete, this causes the nature. Now-a-days many structures are demolished & rebuilt, demolishing of structures causes problem with dumping of waste material. An important aspect of sustainable construction is recycling or reuse of the construction material and demolition waste. It will maintain a friendly green environment. Recycled aggregates has micro cracks on its surface causes low strength, low workability of concrete. This draw back can be avoided by using micro silica. Concrete be designed for 28-day compressive cube strength of 30MPa. Micro silica was incorporated up to 15% of cement content at 5% intervals, while the natural coarse aggregate substitution by recycled coarse aggregate ranges between 25 - 75% at 25% interval. Workability, compressive cube strength, tensile splitting strength and flexural strength these test were taken on fresh and hardened concrete. The result suggests that there is a potential to increase the optimum fraction of recycled aggregate from 25-75% in concrete, with incorporation of 10% micro silica as result shows more strength for mix design of M30 grade concrete.

Micro silica; Recycled aggregate; Natural aggregate; Construction and demolition waste; Recycled concrete.

"EFFECT OF RECYCLED AGGREGATE ON STANDARD CONCRETE INCORPORATE WITH MICRO SILICA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.75-81, June 2019, Available :http://www.jetir.org/papers/JETIR1906Q11.pdf

"EFFECT OF RECYCLED AGGREGATE ON STANDARD CONCRETE INCORPORATE WITH MICRO SILICA", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp75-81, June 2019, Available at : http://www.jetir.org/papers/JETIR1906Q11.pdf