mohammed khattab
Samya HACHEMI
Mohammad Fawzi al Ajlouni
Abstract
The reuse of construction and demolition waste as a new aggregate source can be a very beneficial option to reduce environmental pollution and to contribute to the protection of natural resources. However, the performance of Recycled Concrete Aggregates (RCA) needs to be more studied. To achieve this objective, an experimental study was conducted to evaluate the mechanical and physical properties of concrete made with partial and total replacement of natural coarse aggregate by recycled Refractory Brick Aggregate (RBA). Two parameters were considered in this work:(1) RBA replacement percentages (10%, 20%, 30%, 40%, 50%, 70% and 100%) ;(2) water/cement ratios (i.e., 0.59 and 0.38). A total of 98 specimens of RAC were prepared and tested. The following physical and mechanical properties were examined:(1) water porosity;(2) density ;(3); ultrasonic pulse velocity (UPV);(4) compressive strength ;(5) dynamic elasticity modulus. In conclusion, the performance of RAC decreases with an increase in the replacement ratio of RBA. However, concrete can be manufactured with up to 30% of RBA to reach acceptable properties and good quality
Keywords
Recycled refractory brick,
Wastes, Aggregate,
Compressive strength, dynamic elasticity modulus
