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http://dx.doi.org/10.14190/JRCR.2021.9.4.433

Performance Characteristics of No-Fines Polymer Concrete using Recycled Coarse Aggregate with Binder Contents  

Kim, Do-Heon (Department of Construction Engineering, Dongyang University)
Jung, Hyuk-Sang (Department of Railway Safety and Construction Engineering, Dongyang University)
Kim, Dong-Hyun (Department of Railway Safety and Construction Engineering, Dongyang University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.9, no.4, 2021 , pp. 433-442 More about this Journal
Abstract
In this study, the properties of no-fines polymer concrete with different polymer binder contents were evaluated. The polymer concrete was formulated using a polymeric binder (unsaturated polyester resin), fly ash, and recycled coarse aggregate (60%) and crushed coarse aggregate (40%). The polymeric binder content (4.0-6.0wt.%) was used as an experimental variable because it dramatically affects both the cost-effectiveness and material properties. The results showed that the density, compressive strength, flexural strength both before and after exposure to freezing and thawing increased as the polymer binder content increased, while the absorption, void ratio, permeable voids, coefficient of permeability, and acid resistance (mass loss by acid attack) decreased as the polymeric binder content increased. In particular, even though the void ratio was 18.4% and the water permeability coefficient was 7.3mm/sec, the compressive strength and flexural strength were as high as 38.0MPa and 10.0MPa, respectively, much more significant than those of previous studies. Other properties such as absorption and acid resistance were also found to be excellent. The results appear to be rooted in the increased adhesion of the binder by adding a cross-linking agent and the surface hydrophobicity of the polymer.
Keywords
Recycled coarse aggregate; No-fines polymer concrete; Polymeric binder content; Cohesive strength; Surface hydrophobicity;
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