Abstract
Pervious concrete is an eco-efficient concrete but has problems regarding its mechanical performance and permeability balance. This research investigated the feasibility of using a combination of styrene–butadiene rubber (SBR) and acrylate polymer to improve the toughness of pervious concrete while keeping its permeability. Single-sized aggregate and no sand were considered in the concrete mixture. Acrylate polymers with different solid content, PH, density, and viscosity were emulsion copolymerized with an SBR polymer. Eleven scenarios with different mix proportions and 220 specimens for compressive strength, flexural strength, flexural stiffness, impact resistance, and fracture toughness tests were selected to evaluate the effects of the copolymer on the toughness of copolymer-modified pervious concrete (CMPC). The studies showed that (1) the influence trend of the copolymers generally varied according to different mechanical indexes; (2) XG–6001 acrylate polymer mainly and comprehensively enhanced the toughness of the CMPC; (3) it was difficult to increase the enhancing property of the XG–6001 acrylate polymer with the growth of its mix proportion; (4) the zero-sand pervious concrete with 90% SBR and 10% XG–6001 acrylate emulsion copolymerization proved to have relatively high toughness. The proposed CMPC holds promising application value in sustainability traffic road construction.
Highlights
Provided an increase copolymer had a significant effect on the pervious concrete
This study investigated the toughness of styrene–butadiene rubber (SBR) acrylate polymer-modified pervious concrete with single-sized aggregates and no sand
The following conclusions were drawn from the results: (1) The combination of SBR and acrylate polymer largely increases the toughness of pervious concrete without sand, indicating that the reduction of the sand mixture is feasible while maintaining the pervious concrete’s mechanical performance
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Pervious concrete has recently regained popularity as it is considered as an eco-efficient concrete in the sustainable development of transportation infrastructure [1]. Normal pervious concrete is mainly composed by virtue of large aggregates with little to no fine aggregates [2]. Many countries have adopted pervious concrete to infiltrate and purify the rainwater, to reduce traffic noise, and to raise the pavement skid resistance [3,4] due to its significant air void ratio and well-textured surface [5]. Confined by the defects of easy cracking, pervious concrete is merely applied in traffic roads or parking lots subject to lower traffic load
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