The influence of natural and synthetic fibers on low temperature mixed mode I plus II fracture behavior of warm mix asphalt (WMA) materials

被引：138

作者：

Aliha, M. R. M. ^{[1
]}

Razmi, A. ^{[2
]}

Mansourian, A. ^{[3
]}

机构：

[1] Iran Univ Sci & Technol, Sch Ind Engn, Welding & Joining Res Ctr, Tehran 1684613114, Iran

[2] Islamic Azad Univ, Civil Engn Dept, Ahar Branch, Ahar, Iran

[3] Rd Housing & Urban Dev Res Ctr, Dept Bitumen & Asphalt, Tehran, Iran

来源：

ENGINEERING FRACTURE MECHANICS | 2017年 / 182卷

关键词：

Polyolefin-Aramid fiber; Jute fiber; Warm mix asphalt (WMA); Fracture toughness; Mixed mode I plus II; Test temperature and fiber percentage effects; STRAIN-ENERGY; MIXTURES; TOUGHNESS; RESISTANCE; SPECIMEN; DISC; PERFORMANCE; CONCRETE; NOTCHES; ROCK;

D O I：

10.1016/j.engfracmech.2017.06.003

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this contribution, low temperature crack growth resistance of Warm Mix Asphalt (WMA) mixtures reinforced with two types of fiber, namely natural Jute fiber and synthetic Polyolefin-Aramid (FORTA) fiber is investigated experimentally. Using semi-circular bend (SCB) specimen, the influence of different fiber weight percentages (0.3%, 0.5% and 0.7%) and test temperatures (0 degrees, -10 degrees and -20 degrees C) on mixed mode I + II fracture toughness values (i.e. K-Ic and K-IIc) are studied. It was shown that both fibers can increase in general the fracture resistance of WMA concrete relative to the control mixture. Mdeover, modes I and II fracture toughness and effective fracture toughness (K-eff) values are increased by decreasing the test temperature or increasing the fiber content. The FORTA fiber provided better crack growth resistance characteristics than the Jute fiber for the WMA mixtures. The effects of both natural and synthetic fibers on enhancing the performance of the tested WMA mixtures was more pronounced for dominantly pure mode I loading case. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：322 / 336

页数：15

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