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《结构与土木工程前沿(英文)》 >> 2018年 第12卷 第3期 doi: 10.1007/s11709-017-0425-7

A multi-attribute decision making approach of mix design based on experimental soil characterization

1. Faculty of Science & Technology, The ICFAI University, Dehradun, India
2. College of Engineering, Swansea University, Swansea, UK
3. Department of Civil Engineering, National Institute of Technical Teachers’ Training and Research (NITTTR) Kolkata, India

录用日期: 2017-11-14 发布日期: 2018-05-22

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摘要

The clay mineral composition is one of the major factors that governs the physical properties of silty sand subgrade. Therefore, a thorough knowledge of mineral composition is essential to predict the optimum engineering properties of the soil, which is generally characterized by different indices like maximum dry density (MDD), California bearing ratio (CBR), unconfined compressive strength (UCS) and free swelling index (FSI). In this article, a novel multi-attribute decision making (MADM) based approach of mix design has been proposed for silty sand – artificial clay mix to improve the characteristic strength of a soil subgrade. Experimental investigation has been carried out in this study to illustrate the proposed approach of selecting appropriate proportion for the soil mix to optimize all the above mentioned engineering properties simultaneously. The results show that a mix proportion containing approximately 90% silty sand plus 10% bentonite soil is the optimal combination in context to the present study. The proposed methodology for optimal decision making to choose appropriate combination of bentonite and silty sand is general in nature and therefore, it can be extended to other problems of selecting mineral compositions.

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