Abstract
Pervious concrete is a type of concrete with significantly increased water permeability, ensuring increased rates of drainage of rainfall. The high porosity is achieved by removing a large percentage of fine aggregates from the mix. The present paper is an approach for the addition of steel slag as a substitute for coarse aggregates in pervious concrete. More specifically, three types of aggregates have been used: steel slag, construction and demolition wastes and conventional limestone aggregates. The produced pervious concretes are compared for their properties, such as water permeability, compressive strength and abrasion behaviour. Also this paper contains the study of the porosity analysis of these pervious concrete mix designs by using porosity profiles produced from X-ray CT Scanning. According to the results of this paper, it is observed that the incorporation of industry by-products or of Construction and Demolition (C&D) wastes leads to better abrasion behaviour, and to the increase, in some cases, of the compressive strength and of the water permeability.
Highlights
Construction has a large environmental impact and there is increased awareness of its effects
Relating to the abrasion behaviour, it is observed that the incorporation of industry by-products or of Construction and Demolition (C&D) Wastes leads to a significant reduction of the abrasion;
That can be explained by the high porosity of Steel Slag and C&D Wastes in contrast with the porosity of the limestone aggregates;
Summary
Construction has a large environmental impact and there is increased awareness of its effects. Our research aim should be to protect the environment while facing the problems arising from human activity. This is shown from recent trends in research, including in the concrete and cement industry, for the development of reasonable rainwater management. The beginning of these efforts has started in the last decade in the U.S.A. with the design and development of a new type of product: pervious concrete. Pervious concrete pavement is a unique and effective means to address important environmental issues and support green, sustainable growth. By capturing storm water and allowing it to seep into the ground, pervious concrete is instrumental in recharging groundwater and reducing storm water runoff [1,2,3, 11, 12]
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