Evaluation of the Effect of Copper Slag on the Improvement of the Properties of Pervious Concrete

Document Type : Research Paper


1 Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran

2 Prof., Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran


In recent years, a large number of researches in the field of pervious concrete pavement have been done because of major environmental benefits. The existence of void space in pavements reduces their strength and durability. This problem causes these pavements to be used in some places with low traffic volumes such as sidewalks, driveways, parking lots and residential roads. In this kind of concrete, aggregates play a key role regarding its performance, so using aggregates with suitable properties in concrete, improves its performance. Copper slag is a by-product resulting from the production of copper metal. Using this production in concrete can be considered as an appropriate solution for its environmental problems. In addition, it can improve the performance of concrete mixtures. In this research, the effects of copper slag on some physical characteristics of concretes have been investigated and analyzed.
In this research, two types of aggregates of dolomite and copper slag were used, crushed copper slag gradually was replaced by coarse aggregates of the mixture. Totally seven main mix designs were used with 0 to 100 percent of copper slag. In order to analyze the effect of this aggregate on the performance of pervious concrete, the physical and mechanical properties of these mixtures were investigated. The results indicated that using crushed copper slag causes the unit weight of concrete to be increased because of high specific gravity of copper slag. Also, by gradually replacing of copper slag, void ratio and permeability are increasing due to apparent characteristics and low absorption copper slag than dolomite aggregate. Moreover, the results of compressive, flexural and split-tensile strength tests showed that Adding copper slag has improved this properties and the C60 has the highest increase in comparison with control mix design.


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