BOND STRENGTH OF RECYCLED AGGREGATE

Abstract

The objective of this study is to use of recycled aggregate as replacement of natural aggregate for saving the natural resources and energy. Recycled aggregates consist of crushed, graded inorganic particles processed from the materials that have been used in the constructions and demolition debris. The aim for this present work is to determine the strength characteristic of recycled aggregates for application in structural concrete. The scope of the thesis is to determine and compare the bond strength of concrete by prepared by natural aggregate and recycled aggregate. The investigation was carried out using workability test, compressive strength test, indirect tensile test, and bond strength test. A total of six mixes three from natural coarse aggregate with mix proportion of 1:1.87:3.24, 1:1.59:2.75 & 1:1.41:2.41with w/c 0.45, 0.39 & 0.34 respectively and remaining three were prepared in same ratio with recycled coarse aggregate. A water reducing admixture was used at 1% of weight of cement. It was observed that the workability of concrete reduces with use of recycled aggregate. For strength characteristics, the result showed a slight decrease in compressive strength, tensile strength and bond strength as the percentage of recycled aggregate is increased.