REVIEW ON BOND STRENGTH AND DUREBILITY OF RECYCLED CONCRET AGGERGATE
Sunit Dhameliya
Post Graduation Student, Department of Civil Engineering, CGPIT, Uka Tarsadia University, Bardoli, Gujarat, India , IN
Jasmine Gadiya
Post Graduation Student, Department of Civil Engineering, CGPIT, Uka Tarsadia University, Bardoli, Gujarat, India , IN
Maulik Kakadiya
Post Graduation Student, Department of Civil Engineering, CGPIT, Uka Tarsadia University, Bardoli, Gujarat, India , IN
Keywords: recycled aggregate, bond strength, durability of recycled aggregate , recycled aggregate concert, natural aggregate
Abstract
Scarcity of natural coarse aggregate has initiated the use of recycled aggregate obtained
from crushed concrete rubbles in building industry. Large quantity of concrete waste have been produced
by construction & demolition industries in India and many other developing countries & it is likely to
increase in future. On other hand, In past year about 30 million tons of concrete waste is produced out of
which major quantity of recycled aggregate at present is used in lower end applications, however in some
developed economies; it is also used in structural concrete, due to its quality which is certified and bears
Confirmite Europeenne (CE) certificate. Thus the idea of using recycle concrete aggregate (RCA) in a
production of new concrete is an effective alternative of reducing the concrete waste. The quality of
recycled aggregate concrete (RAC) produced depends on the quality of recycled aggregate obtained from
old concrete. Recycled concrete aggregate shows inferior physical properties than the natural coarse
aggregate. However, treatment of recycled concrete aggregate by acid, thermal and mechanical means
improve the physical properties of RCA significantly. The compressive strength of concrete made with
untreated RCA is 14% less than natural aggregate concret ( NAC). Treatment improves the compressive
strength of RAC made with treated aggregates and is more than 95% of NAC, irrespective of the treatment
method used. Acid treatment method is more effective in improving the bond strength of reinforcement and
concrete. The greater creep coefficients and shrinkage strain of recycled concrete had a significant
influence on the long term behaviour of structural recycled concrete. Therefore, the different time
dependent properties of RAC need to be considered in structural design. This paper aims to study research
work done on literature of bond strength & durability of RAC.
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