Title: Graphene Oxide-Modified Pervious Concrete with Fly Ash as Sole Binder

Author(s): Gang Xu and Xianming Shi

Publication: Materials Journal

Volume: 115

Issue: 3

Appears on pages(s): 369-379

Keywords: clinker-free binder; fly ash; graphene oxide; infiltration rate; mechanic strength; pervious concrete; scanning electron microscopy

DOI: 10.14359/51701126

Date: 5/1/2018

Abstract:
An environmentally friendly pervious concrete was developed by using fly ash as the sole binder modified by graphene oxide (GO). The density, void ratio, mechanical strength, Young’s modulus, infiltration rate, deicer salt scaling, and degradation resistance of this pervious concrete were measured against three control groups. The test results indicated that the addition of 0.02% GO (by weight of fly ash) significantly increased compressive strength, split tensile strength, Young’s modulus, deicer salt scaling resistance, and degradation resistance of the fly ash pervious concrete. Overall, this innovative fly ash pervious concrete showed a comparable performance to portland cement pervious concrete. A microscopic investigation using an electron microprobe was also conducted to obtain more insights on the effects of GO and chemical activators on the fly ash pervious concrete.