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Back calculated modulus correction coefficient for asphalt concrete layer based on FWD(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:
24-29
Research Field:
道路工程
Publishing date:

Info

Title:
Back calculated modulus correction coefficient for asphalt concrete layer based on FWD
Author(s):
XU Yan-ling1;  TANG Bo-ming1;  XIE Guo-dong2;  CHEN Sen1
1. Chongqing Key Laboratory of Mountainous Road Structure and Materials, Chongqing Jiaotong University, Chongqing 400074, China; 2. Tianjin Municipal Engineering Design & Research Institute, Tianjin 300051, China
Keywords:
road engineering;  asphalt concrete;  fall weight rflectometer;  laboratory dynamic elastic modulus;  back calculated modulus;  correction coefficient K;  bearing capacity of pavement
PACS:
U416.2
DOI:
-
Abstract:
Aiming at the differences between laboratory dynamic elastic modulus and back calculated modulus of asphalt concrete layer, through paving test section, conducting falling weight reflectometer(FWD)field testing, coning sample, modeling species with gyratory compaction method, doing dynamic triaxial test, calculating composite-laboratory modulus and back caculating modulus of asphalt layer, the relationship between the laboratory dynamic elastic modulus ES and the back calculated modulus EB of asphalt concrete layer was presented. The correction coefficient K(K=EC/EB)of back caculated modulus was calculated. The results show that the resilient modulus of field asphalt concrete layer can be got according to K value, which is more convenient for evaluating the bearing capacity of existing road, and it can be taken as design parameters in the structural design method of overlay. 19 tabs, 4 figs, 9 refs.

References:

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Memo

Memo:
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Last Update: 2012-08-20