|Table of Contents|

Crack resistance of fiber-reinforced emulsion asphalt crushed stone seal based on fracture energy(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年05期
Page:
12-17
Research Field:
Publishing date:

Info

Title:
Crack resistance of fiber-reinforced emulsion asphalt crushed stone seal based on fracture energy
Author(s):
LIU Yan-yan1;  LING Tian-qing1;  JIANG Ke2
1. School of Civil Engineering and Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 2. China Merchants Chongqing Communications Research & Design Institute Co Ltd, Chongqing 400067, China
Keywords:
road engineering;  seal coat;  fracture energy;  orthogonal analysis
PACS:
U416.217
DOI:
-
Abstract:
In order to determine the best fiber and its amount in fiber-reinforced emulsion asphalt crushed stone seal, and the impact of the fiber on crack resistance of seal coat materials, the contact angle between four kinds of fiber(A-basalt fiber, B-alkali-free glass fiber, C-high-strength fiber, D-surface treated fiber)and emulsion asphalt before and after demulsification and in different temperatures were measured, and the maximum bending force, the maximum deflection, the fracture energy were analyzed with the orthogonal test under 3 factors and 4 levels. Test results show that the adhesion of emulsion asphalt and fiber decreases with the increase of temperature, the adhesion is D> B> A> C, and the D fiber is more appropriate. The asphalt content is the most important factor to influence bending strength and fracture energy, followed by the amount of fiber, finally the fiber length. From the energy point, the optimum combination scheme for the asphalt content is 1.2 kg/m2, for fiber content 160 g/m2, and for fiber length 12 cm. The maximum bending force of the compound structure specimen increases by 53%, the maximum deflection increases by 98.7%, and the fracture energy increases by 159.1% after adding the glass fiber in fiber-reinforced emulsion asphalt crushed stone seal. The cracks in specimen develop to 1, 3, 5 cm, and the time extends to 37.5, 39.5, 269 s respectively. 5 tabs, 10 figs, 11 refs.

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Last Update: 2012-10-30