|Table of Contents|

Influence of intermediate principal stress on asphalt mixture strength in positive temperature(PDF)

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

Issue:
2011年04期
Page:
12-15,21
Research Field:
Publishing date:
2011-08-20

Info

Title:
Influence of intermediate principal stress on asphalt mixture strength in positive temperature
Author(s):
SUO Li-jun1;  TONG Huai-feng1;  WANG Bing-gang2
1. Department of Civil Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, Henan, China; 2. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
road engineering;  asphalt mixture;  strength;  intermediate principal stress;  ortho- gonal test
PACS:
U414.1
DOI:
-
Abstract:
Both strength theory of Mohr-Coulomb and testing methods, which are used to value the strength of asphalt mixture in specification, do not include intermediate principal stress. Mechanical study corresponding to closed tri-axial test is carried out. The rest shows that maximum shear stress in tri-axial extrusion stress state is more than the counterparts in tri-axial compression stress state. The result is attributed to the difference of intermediate principal stress in two different stress states. In order to study the influence of intermediate principal stress on asphalt mixture strength, the characteristics of testing method, which is related to intermediate principal stress's influence on asphalt mixture strength, is considered, and testing device for plain strain is designed, and the asphalt mixture strength in different condition is tested on the base of orthogonal test, which includes three factors, such as temperature, loading velocity and intermediate principal stress. When both interaction of different factors and temperature difference are considered, the orthogonal test design significance analysis shows that intermediate principal stress has the most obvious influence on asphalt mixture strength, the followed factors are temperature and loading velocity. 6 tabs, 2 figs, 11 refs.

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Last Update: 2011-08-20