PERFORMANCE OF POROUS CONCRETE BLOCK FOR IMPERVIOUS PAVEMENT

Abstract

Nowadays, the application of concrete block pavement in road construction industry is increasing rapidly. This is because the concrete block pavement (CBP) can produce a variety of beautiful patterns pavement surface and it becomes a choice on how to further views of cities. However, water on the pavement surface often occurs and it can affect the quality of the pavement. To overcome this problem, the system of concrete block permeable pavement (CBPP) has been widely used in a number of developed countries. In CBPP system, the water will be allowed to seep into the bedding layers and sub-base through the gap between the concrete blocks filled with coarse sand filler. Space for water seepage through the blocks is limited if clogging material accumulated in the filler sand and it can lead to slow diffusion rate. Studies have been done to modify the concrete blocks that are common to the porous concrete blocks to accelerate the loss of water on the surface of the pavement. Based on past research, porous concrete has disadvantages in terms of strength and durability, the glass fibers used in the porous concrete mix to overcome the weakness. Concrete compressive strength test and water seepage tests were performed on concrete blocks that have been modified for comparison in terms of strength and infiltration rate of the concrete block. From the results, it was found compressive strength of porous concrete block is very low compared to the control concrete block strength with reduction of 75.29%. Even, the addition of glass fibers in the mixture cannot help to improve the compressive strength of porous concrete block. The rate of water seepage in a block of concrete is about 241cm3 / s for filler-filled pores. While, the rate of water seepage to the model pavement 60cm x 120cm stood at 2938 cm3 / s for pores and gap fill with filler.