|Table of Contents|

Design method of asphalt pavement's overlay based on valid modulus(PDF)

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

Issue:
2012年04期
Page:
1-6
Research Field:
Publishing date:

Info

Title:
Design method of asphalt pavement's overlay based on valid modulus
Author(s):
WU Jian-min1;  DU Rong-yao2;  WANG Xiao-feng2
1. Key Laboratory for Special Area Highway Engineering of the Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Henan Provincial Communications Planning, Survey & Design Institute Co Ltd, Zhengzhou 450052, Henan, China
Keywords:
road engineering;  overlay design;  valid modulus;  layer coefficient;  AASHTO
PACS:
U416.217
DOI:
-
Abstract:
The current overlay design method uses the deflection as the only design index in China, which can not meet the requirement of the asphalt pavements with serious diseases. According to the relationship between modulus and layer coefficient, the effective modulus suggested value of semi-rigid asphalt pavement layers was determined by referencing to the AASHTO's old asphalt surface layer coefficient. Combining with Chinese's overlay design method, a new overlay design method was set up based on the valid modulus of asphalt pavement. As an example the overlay on an actual asphalt pavement with diseases wasdesigned by the new method, the valid modulus of pavement layers was determined, the overlay thickness was 10 cm which is basically equal to the AI method, and little thin than the one by the AASHTO method. The results indicate that the problem in current overlay design method can be avoid by using this method. 10 tabs, 1 fig, 9 refs.

References:

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Last Update: 2012-08-30