کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6773740 1431929 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and parametric study of a pavement foundation layer made of cement-treated fine-grained lateritic soil
ترجمه فارسی عنوان
طراحی و بررسی پارامتری لایه پایه پیاده رو ساخته شده از خاک لاتینی ریز دانه ای با سیمان
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
This study deals with the application of experimental results to the design of a roadway structure. It firstly addresses the design of a layer of pavement foundation made of cement-treated fine-grained lateritic soil, using the American empirical and the French mechanistic-empirical methods developed by AASHTO (American Association of State Highway and Transportation Officials) and LCPC (Central Laboratory of Roads and Bridges), respectively. Then, a comparison is made of the results obtained by these two pavement design methods with those provided by the CEBTP (Experimental Center for Research and Studies in Building and Public Works) pavement design manual for tropical countries. It is observed that there is very little difference between the thicknesses of the pavement layers (D) obtained by the LCPC mechanistic-empirical method of pavement design and the AASHTO empirical pavement design method. However, the pavement thicknesses (D) obtained by the LCPC pavement design method are lower than those obtained by the AASHTO pavement design method in the order of 8%, thereby reducing the input of a significant amount of lateritic soil at the worksite. It is further observed that the thicknesses (D) obtained by the LCPC and AASHTO pavement design methods are 1-1.9 times lower than those provided in the CEBTP pavement design manual, used for several decades in the tropics. This considerable decrease in the cement-treated fine grained lateritic soil required for the pavement body is both economically profitable for project managers and beneficial for the environment. Regression relationships were proposed based on the key parameters, namely, resilient modulus MR, modulus of elasticity E, layer coefficient ai and structural number SN. They provide strong relationships that yield good linear correlations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soils and Foundations - Volume 58, Issue 3, June 2018, Pages 666-677
نویسندگان
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