Elaboration of a Road Material Based on Clayey Soil and Crushed Sand

作     者：H.G.R.Sekloka C.P.Yabi R.Cloots M.Gibigaye 

作者机构：Group of Research in Energy and Environment from Materials(GREENMAT)LiègeBelgium Laboratory of Energetics and Applied Mechanics(LEMA)CotonouBenin Laboratory of Tests and Studies in Civil Engineering(L2EGC)AbomeyBenin 

出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工（英文）)

年 卷 期：2022年第18卷第6期

页      面：1595-1605页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：University of Abomey Calavi JSS Academy of Higher Education and Research, JSS AHER Université de Liège, ULg 

主　　题：Clayey sand crushed sand hydraulic binder road base 

摘      要：To contribute to the enhancement of unconventional local materials used for road construction,this study characterizes a crushed sand 0/5,a clayey soil and the litho-stabilized material without and with hydraulic binder and determines their use in accordance with some reference specifications(CEBTP 1984).It is shown that the different components are not usable alone in pavement base.Indeed,the plasticity index obtained for the clayey soil is 21%,a value higher than the imposed standards.In addition,the grading of the 0/5 crushed sand does not fit into the range proposed by CEBTP.A combination of these two(02)components is therefore considered to obtain a suitable material usable for the sub-base.This new material does not enter any class of the CEBTP lateritic soils.In order to be used in base layer,a treatment with hydraulic binder is carried out with the intention to improve its mechanical performances.The optimal dosage of hydraulic binder to achieve the desired mechanical performance is obtained by studying the evolution of the mechanical characteristics of the mixture.After this treatment,the Bearing Ratio index of the mix increases from 37 to 223 for the optimal dosage and the dry compaction density decreases from 2.11 to 2.06 g/cm3 while the optimal water content increases from 9%to 10.1%.