IMPROVEMENT OF EXPANSIVE SOIL BY USING FIBER GLASS _SILICA FUME MIXTURE

Alyaa  Radhi Mehsin; Adnan Mohammed; Maysam Al-Hadidi; Firas Ghrari

doi:10.30572/2018/KJE/160115

Authors

Alyaa Radhi Mehsin Reconstruction and projects department, University of Baghdad, Baghdad, Iraq
Adnan Qahtan Mohammed Reconstruction and projects department, University of Baghdad, Baghdad, Iraq https://orcid.org/0000-0002-3884-8571
Maysam Th. Al-Hadidi Department of Water Resources Engineering, Engineering College, University of Baghdad, Baghdad, Iraq https://orcid.org/0000-0002-9922-5757
Firas Ghrari Reconstruction and projects department, University of Baghdad, Baghdad, Iraq https://orcid.org/0000-0003-3404-5963

DOI:

https://doi.org/10.30572/2018/KJE/160115

Keywords:

Expansive Soil, Silica Fume, Fiber glass, Soil Enhancement, Bentonite

Abstract

A fiber glass -silica fume and silica fume (SF) mix (F-SF) have been employed in this study in order to enhance and relate their effects on the expansive soil. Bentonite (B) was added with natural soil in a lab at a ratio of 50% by soil dry weight to create the soil used in this study. The (SF) was added alone at (8,9,10,11,12, and 13) % and 1 % of Fiber glass (F) was added to the (clay soil - SF) mixture. For both treated and untreated soil, odometer, shear box, and swelling tests were used to examine the behavior of the soil after the addition of (SF) and (F-SF) mixture. From the outcome of the experimental tests, we noticed that (SF) reducing both comparison index (Cc), reloading index (Cr), and swelling percentage (SW)%. Also, it is influenced on shear strength parameters by decreasing cohesion (c) and increasing internal angle friction (φ). As well as adding 1 % (F) to the (clay soil - SF) mixture modify the prepared soil by reducing (Cc), (Cr), (SW) % and increasing (c, φ). Based on all of the above results, we concluded that adding (SF) and (F-SF) mix. can enhance the engineering characteristics of swelling soil.

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Author Biography

Alyaa Radhi Mehsin, Reconstruction and projects department, University of Baghdad, Baghdad, Iraq

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