Performance assessment of pervious concrete road on strength and permeability by using silica fume

Pervious concrete is recognized as an environmentally friendly material to meet the growing demands for pavement infrastructure. In this study, the influence of fine aggregate and coarse aggregate quantities on the properties of pervious concrete and performance characteristics of pervious concrete in terms of permeability, compressive strength, flexural strength, split tensile strength were carried out. Materials used are OPC Type-I of Grade 43, fine aggregate confirming gradation (Zone II) and coarse aggregate mix of 4.75-10 mm, 10-12.5 mm, 12.5-16 mm, 16-20 mm of 15%, 40%, 30% and 15% of the total weight of coarse aggregate respectively. Mixes were prepared with the water-cement ratio of 0.34 and maintaining aggregate-cement ratio as 3.5:1. Here, a total of five numbers mixes were prepared, out of which one for control mixture having M35 grade and remaining four mixtures were prepared by partial replacement of fine aggregated with coarse aggregate in the range of 70-100% by weight. It was observed from the study that with the increase of fine aggregates, various mechanical properties such that compressive strength, flexural strength, split tensile strength increase, and coefficient of permeability decrease. Also, the relationship between the strength, permeability, and total void present in graded aggregate based on angularity number was developed. As the concrete has high porosity, it has low strength as compared to impermeable concrete. To achieve better strength and permeability, a high-performance pervious concrete was developed using cement 43 grade, cementitious material like silica fume which replace the cement by 0%, 4%, 8%, 12%, and 16%, with sand (5%, 7%, and 9%), mentioned the size of coarse aggregate, a small quantity of fine aggregates, superplasticizer (Rheoplast), and a fixed water-cement ratio 0.34. This study represents a detailed overview of performance properties such as compressive strength, split tensile strength, flexural strength, and Cantabro abrasion resistance test at 7, 14, 28 days. The outcome of the experimental test showed that partial replacement of silica fume (4-12%) with cement exhibited better results in comparison with the control mixture.Copyright (c) 2022 Elsevier Ltd. All rights reserved.Selection and peer-review under responsibility of the scientific committee of the Sustainable Materials and Practices for Built Environment.