Effects of Fiber Type on the Mechanical Properties of the Open-Graded Friction Course Mixture

Mengmeng Wu; Wanwan Wang; Hongmei Cai; Jilei Liang; Jiawei Hua; Haoyan Dong; Lin Zhao; Yuzhen Zhang

doi:10.1021/acsomega.2c05139

Effects of Fiber Type on the Mechanical Properties of the Open-Graded Friction Course Mixture

ACS Omega. 2022 Nov 3;7(45):41353-41360. doi: 10.1021/acsomega.2c05139. eCollection 2022 Nov 15.

Authors

Mengmeng Wu¹, Wanwan Wang¹, Hongmei Cai², Jilei Liang¹, Jiawei Hua¹, Haoyan Dong¹, Lin Zhao¹, Yuzhen Zhang³

Affiliations

¹ College of Pharmacy and Chemistry and Chemical Engineering, Taizhou University, Taizhou225300, P. R. China.
² Taizhou Customs, Taizhou225300, P. R. China.
³ State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao266555, P. R. China.

Abstract

The open-graded friction courses (OGFCs) have a large number of interconnected voids, which may cause serious water damage to the pavement. Hence, the road performance needs to be investigated. In this study, the mechanical properties of OGFCs containing two different fibers (lignin and mineral fiber) were investigated. Based on the procedure proposed by the Chinese specification JTG F40-2004, OGFCs were designed with the asphalt content between 4.1 and 4.7 wt % to find the optimal asphalt content (OAC). The mesh-basket draindown test was used to check the fiber's stabilization and absorption of bitumen. OGFCs containing the lignin/mineral fiber with OAC would be preferred in terms of the bulk specific gravity. These results indicate that the fiber can bring higher air voids to the OGFCs, and the different specific gravities of fibers may primarily account for the result. Both the lignin and mineral fibers can bring much more asphalts padded in the pores of mineral aggregates and subsequently larger OAC in OGFCs due to their higher asphalt absorption. Performance experiments were carried out to check the dynamic stability and moisture susceptibility of OGFCs containing the lignin/mineral fiber. The study suggests that the lignin and mineral fiber can be used to adjust the internal environment of OGFCs, enhancing the moisture damage resistance and improving the rutting resistance of OGFCs at high temperatures.