Laboratory Studies on Performance of Porous Concrete

Paper by FORTES MERIGHI BANDEIRA from ISCR 10th 2006 Brussels Belgium

The skid resistance of any surface is an important characteristic for the driving safety point of view. The rain affects the traffic security, because there are splash and sprays effects caused by the truck wheel. This fact contributes to the dynamic hydroplaning effect. In recent years many agencies research’s has been studied the porous concrete as material to server a sacrifice layer however with skid-resistant increase. The purpose of this study was to determiner the mechanical and hydraulic characteristics of the porous concrete with higher percent of air void to be used as drainage layer of pavement to obtain better development in terms of skid resistance. Also is important to add some information regarding the bond of the porous concrete to the sub layer, because the thickness is around 6 to 10 cm and thus being, these materials must work as a composite pavement to guarantee a significant reduction of bending stresses on the concrete slab. In this way the bond strength between both materials is essential for the performance of the thin porous concrete overlay creating itself thus a composed structure of pavement. It was made tests in specimens to obtain compressive and flexural strength and permeability.

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