00317621

open access

Version of Record

クリカエシ サンジク アッシュク シケン ニ モトズク スイコウセイ リュウド チョウセイ スラグ ロバンザイ ノ フクゲン ヘンケイ ケイスウ ノ ヒョウカ

Resilient modulus of Hydraulic Mechanically Stabilized slag base-course material based on repeated loading triaxial compression test

Japanese (日本語)

神戸大学都市安全研究センター研究報告

6

123-130

神戸大学都市安全研究センター

2002-03

2007-04-13

In this paper, in order to investigate the resilient modulus of hydraulic mechanically stabilized slag base-course material used in asphalt pavement, a repeated loading triaxial compression test was carried out with improved measurement techniques of axial strain and applied load. The repeated loading was conducted following the method suggested by AASHTO; and for comparison, the method the authors have adopted so far (hereafter called 'Nishi's method') was also applied. From the test results obtained, the followings can be pointed out. 1)The resilient modulus obtained in this study was similar to the one obtained in the past experimental study: it increases as the applied mean principal stress increases and also as the applied deviator stress decreases. It is modelled in the form of a power function of mean principal stress and deviator stress. Moreover, the resilient modulus increases as the curing time increases. 2) The resilient modulus obtained from axial strain measured with gap sensors was quite larger than the one obtained from axial strain measured with LVDT mounted outside the triaxial cell. This is due to the over-estimate of axial strain resulting from bedding error and disturbance at the end faces of a specimen. 3) The ratio of the resilient modulus based on gap sensor measurements to the one based on LVDT measurements increases as the curing time increases, and it ranges from 1.8 to 2.1 for a curing time of 0 day and From 8.I to 12.5 for a curing time of 90 days. This indicates that higher accuracy is required in the measurement of axial strain as the specimen hardens. 4) In the stress level applied in this study, difference in loading method, AASHTO or Nishi's methods, has little influence on the estimated resilient modulus.

紀要論文