Effect of open-graded coarse aggregate on concrete paving blocks properties for pavement

Abstract

The potential of using coarse aggregate for open graded in the production of concrete paving blocks (CPB) were presented in this study. Three different sizes of coarse aggregate were used through the investigation: (a) passes 8 mm retains 5 mm, (b) passes 10 mm retains 8 mm and (c) passes 10 mm retains 5 mm as control. Furthermore, a series of tests were carried out to determine the properties of the blocks, namely density, porosity, weight loss, compressive strength and skid resistance test. It was found that the size of coarse aggregate effects on many aspects, especially in the strength of the blocks. However, at the same time it also provides sufficient strength or the minimum required strength (30 MPa) for a rectangular block to be used as part of paving surface. In addition, the blocks show that it is suitable for use in vehicle area when the value of the British Pendulum Number of skid resistance test more than 45 referred to BS 6717; 2001.