SHEAR-FRICTION STRENGTH OF RECYCLED AGGREGATE CONCRETE

  • Khaldoun N. Rahal Kuwait University, Kuwait, Kuwait

Abstract

The production of cement and aggregates used to produce concrete has caused a considerable impact on the environment. Crushing concrete to produce coarse aggregate to use in new concrete is one of the emerging  means  for  achieving  a  more  environmentally  friendly  concrete.  The  structural  behavior  of recycled aggregate concrete (RAC) needs to be thoroughly studied to investigate the suitability of design rocedures  developed  for  normal  aggregate  concrete  (NAC)  for  use  in  RAC.  The  weaker  recycled aggregates make the ability of RAC to resist shear by aggregate interlock a concern. This paper reports the results of an experimental testing program to investigate the shear-friction properties of RAC. Eight push-over  specimens  were  tested  in  compression  to  investigate  their  shear  strength.  Three  of  the specimens were cast using conventional concrete while the remaining five specimens were cast using concrete in which all the coarse aggregate was recycled from old concrete. The specimens contained a variable amount of transverse “clamping” reinforcement. The experimental results showed that the effect of
using the recycled coarse aggregate was minimal as the strength of the push-over specimens made of recycled coarse aggregate was nearly similar to that of the specimens made of virgin aggregates. The observed shear strength of the NAC and RAC specimens were compared against the calculations of the ACI building code, and the calculated results were shown to be conservative.

Published
2011-08-01
How to Cite
N. RAHAL, Khaldoun. SHEAR-FRICTION STRENGTH OF RECYCLED AGGREGATE CONCRETE. EACEF - International Conference of Civil Engineering, [S.l.], v. 1, p. 031, aug. 2011. Available at: <http://proceeding.eacef.com/ojs/index.php/EACEF/article/view/226>. Date accessed: 19 may 2024.
Section
Group of Building Materials Engineering (Nanotechnology)