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Design method of crumb rubber modified SMA mixture using different additives(PDF)

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

Issue:
2011年03期
Page:
13-16
Research Field:
Publishing date:
2011-06-30

Info

Title:
Design method of crumb rubber modified SMA mixture using different additives
Author(s):
LIU Ya-min1;  HAN Sen1;  XU Ou-ming2
1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Material Science and Engineering, Chang'an University, Xi'an 710061, Shaanxi, China
Keywords:
road engineering;  asphalt rubber;  SMA;  road performance;  high modulus additive
PACS:
U414.3
DOI:
-
Abstract:
In order to study the design and performance of asphalt rubber SMA mixture, based on the design method of ordinary SMA mixture, three crumb rubbers, one base asphalt and four gap-graded gradations were selected for studying the design progress. Employing wheel tracking test and fatigue test, the effect of several factors, such as asphalt rubber content, SBS and high modulus additive, on high-temperature performance and fatigue resistance of mixture were analyzed. The results indicate that: compared to ordinary SMA mixture, the asphalt rubber SMA mixture has a fewer mineral filler content and a greater air voids; with increasing asphalt content, the high-temperature performance of mixture decrease, while the fatigue resistance is promoted; the results of wheel tracking test and fatigue test have a similar tendency when at greater asphalt content, the performance are promoted obviously by adding high modulus additive into mixture. 4 tabs, 2 figs, 10 refs.

References:

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Memo

Memo:
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Last Update: 2011-06-30