Microparticle filtration ability of pervious concrete mixed with recycled synthetic fibers: Fid-Bau Portal

Microparticle filtration ability of pervious concrete mixed with recycled synthetic fibers

Nhat Ho Tran, Trinh / Puttiwongrak, Avirut / Pongsopha, Phattharachai / Intarabut, Darrakorn / Jamsawang, Pitthaya / Sukontasukkul, Piti

Abstract

Highlights • Fiber reinforced porous concrete (FRPC) can filter microparticles effectively. • Micro-plastic and rubber with sizes of 0.105–0.841 mm are used in this research. • FRPC is more effective in filtering micro particles than PC. • The filtering weight increases linearly with the number of test cycles. • FRPC is predicted to clog faster than PC because it can retain more particles.

Abstract In this study, the properties of fiber reinforced pervious concrete (FRPC) was investigated, with the focus on the ability to filter microparticles. The fibers were obtained from recycle plastic bags and mixed with pervious concrete at the rate of 0 to 0.3% by volume fractions. In addition, the effect of silica fume and aggregate size was also investigated. The experimental part consisted of tests on mechanical properties (i.e., compressive and flexural strength) and physical properties (i.e., void ratio test, permeability, and microparticle filtration). Two types of microparticles were used: microplastics (MPs) and microrubbers (MRs). Results indicated that the addition of fibers led to the decrease in both compressive and flexural strengths. In the case of physical properties, fibers provided direct effect to the void system of concrete, which led to the reduction of permeability and void ratio as well as the improvement in microparticle filtration ability. The addition of silica fume and the use of smaller size aggregates also gave positive effects on the microparticle filtration ability of pervious concrete.