Rainwater harvesting and flood prevention in cities are significant urban
hydrological concerns. The use of porous pavement is one of the most
effective solutions to handle this matter. Thus, this study aims to develop
Porous Interlocking Concrete Pavement (PICP) using recycled aggregate
from concrete waste. This porous pavement, then later, can be utilized in
low traffic areas and parking lots to harvest water by infiltration and
reduce surface runoff. First, the physical properties of the porous
concrete blocks, such as density (unit weight), absorption, coefficient of
permeability, and porosity, were studied. Also, the mechanical properties
of concrete mixtures like compressive strength and flexural strength were
tested. This study used two types of PICP, the first one with ordinary
coarse aggregate (P1) and the second with recycled crushed concrete
coarse aggregate (P2), and then compared their performance to the
conventional concrete pavement blocks used the two types of coarse
aggregate (R1 and R2). The results show that the unit weight (density) of
porous types was reduced by 25% and 26%, and the total porosity
increases by around 2.4 times and 18 times respectively, as compared to
conventional concrete pavement types. However, the compressive
strength and flexural strength of porous concrete types decreased by
(55% and 71%), respectively, compared to conventional types. Overall, the
infiltration test results showed that the infiltrated water through porous
concrete increased by about 83% in comparison to conventional concrete.
From the results, utilizing porous concrete pavement can be considered a
promising material in terms of water harvesting and decreasing rainwater
flooding. Additionally, using recycled concrete can bring economical and
environmental benefits.
EXPERIMENT AND MODELING ON RELATIONSHIP BETWEEN COMPRESSIVE STRENGTH AND VOID RATIO OF POROUS CONCRETE
