|Table of Contents|

Research on force ductility test of modified asphalt(PDF)

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

Issue:
2012年03期
Page:
30-33
Research Field:
道路工程
Publishing date:

Info

Title:
Research on force ductility test of modified asphalt
Author(s):
ZHOU Yan1;  ZHANG Kai2;  CHEN Shuan-fa3;  YUAN Rui-xing3
1. Department of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China; 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 3. School of Materials Science and Engineering, Chang'an University, Xi'an 710061, Shaanxi, China
Keywords:
road engineering;  modified asphalt;  low temperature performance;  force-ductility;  grey relevant method
PACS:
U416.217
DOI:
-
Abstract:
In order to evaluate the low temperature performance of modified asphalt, seven representative modified asphalts were evaluated by force-ductility test. The toughness and tenacity, and tensile flexibility parameters were extracted, the tensile mechanism and characteristics were analyzed before and after aging. Grey relevant method is used to analyze the relationship of parameter indexes of modified asphalt before and after aging with bending creep rate and bending strain energy density. The results show that the change law of peak tension and toughness with tenacity parameters before and after aging in force-ductility test is inconsistent, the single index is difficult to overall reflect the low temperature performance of modified asphalt. The change law of tensile flexibility before and after aging in force-ductility test is stable, and it is the most significant factor influencing bending creep rate and bending strain energy density of asphalt mixture. The low temperature performance evaluation of modified asphalt by tensile flexibility is reasonable. 3 tabs, 5 figs, 9 refs.

References:

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Last Update: 2012-08-20