Development of mixture design of pervious concrete with changing coarse aggregate size
- Vol.103(3), Sep
- USA Springer 2022
- 733-745p.
The Economy of all countries is developing at a rapid pace and to maintain equilibrium between nature and growth, it needs to conserve all its natural resources. Full progress can be achieved by any country if it uses all the natural resources equitably including the most important water. This investigation was mainly focused on two criteria, in the first criteria was to eliminate the fine aggregate from concrete and the other was to allow water to pass through the concrete. Due to the consideration of these two criteria, this type of concrete is known as pervious concrete (PC). The purpose of this investigation was to develop mixture design and mixture proportioning charts for PC. The main properties studied include compressive strength, density, and permeability and void ratio. To measure the permeability of the PC, a test setup was created in the laboratory. The falling head test method was used to evaluate the permeability coefficient for PC. PC was produced using two sizes of natural coarse aggregates. The first group is 4.75–10 mm i.e., size A (passing from 10 mm and retaining on 4.75 mm IS sieve) and the second group is 10–20 mm i.e., size B (passing from 20 mm and retaining on 10 mm IS sieve). The cement content was used in the range 250–400 kg/m3 for the experimental investigation work. The aggregate/cement ratio was used 4:1. Three w/c ratio were used i.e., 0.3, 0.35 and 0.4, respectively. It has been observed that for 4.75–10 mm size aggregates, the compressive strength is more as compared to 10–20 mm size aggregates. Other PC properties such as void ratio, permeability were not much affected by changing coarse aggregate size. Based on the PC property results, PC mixture design charts were developed. The step-by-step process of PC mixture design was developed with the help of PC mixture design charts. This mixture proportioning method may be useful for the development of the preliminary mixture design of PC.