01661031

Component

Waste Cured Carbon Fiber Composite Material (CCFCM) is increasingly becoming available and has limited reuse applications. In this study, post-industrial CCFCM was mechanically refined into the fibrous material and used as a reinforcement to improve the mechanical properties of pervious concrete (PC). Four PC mixtures were included in the study containing zero (control), three, four, and five percent CCFCM by volume. Porosities of specimens from all mixtures corresponded well to the targeted porosity at 25 percent. Infiltration rates of all CCFCM mixtures were above the acceptable level of 1,200 cm/h. Paired t-tests showed that all CCFCM mixtures significantly outperformed the control in split tensile strength (f’t) and modulus of rupture (MR). Split tensile increased by 57-84% and MR increased by 36-65% on 28-day testing. Load-displacement curves of CCFCM mixtures compared with that of the control indicated increases of 41-54% in toughness indices. In terms of compressive strength (f’c), no significant improvement was observed due to CCFCM incorporation. Overall, within the tested range, up to four percent CCFCM addition to PC presented the optimum mechanical properties, accompanied by satisfactory infiltration rates. The modifications to the mixture design may be necessary at higher CCFCM contents.

This paper was sponsored by TRB committee AFN10 Standing Committee on Basic Research and Emerging Technologies Related to Concrete. Alternate title: Enhancing Mechanical Properties of Pervious Concrete Using Carbon Fiber Composite Reinforcement

18-01948

English

8p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; References; Tables

Carbon fibers; Composite materials; Fiber reinforced concrete; Mechanical properties; Modulus of rupture; Porous pavements; Salvage; Tensile strength

Pervious concrete

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-01948

TRIS, TRB, ATRI

Jan 8 2018 10:29AM