Abstract
Many researchers have been interested in studying the effect of adding local natural materials or construction waste on the properties of poor subgrade soil. However, changes in size and strength of expansive soils can cause extensive damage to the geotechnical infrastructure. This damage is often repeatable and latent in the long term, and is a critical issue in highway subgrade engineering. This paper examines the effect of adding both Fine Silica Sand (FSS) and Granite Cutting Powder Waste (GPW) materials on the welling characteristics of expansive soils. Atterberg limits, free swell index, and rate of swell of the mixtures were used as a key to assess properties of a group of expansive soil samples after adding different percentages of the mentioned materials. The rates of additions were 10%, 20%, 30%, 40%, 50%, 60 and 70% of the weight of the soil samples. The test results showed that FSS and GPW significantly affect the expansive soil properties. However, adding 70% of both FSS and GPW reduced the swelling index from 58.3% to 6.6% and from 58.3% to 11% after 7 days of curing, respectively. This study suggests that the Fine Silica Sand and Granite Powder Waste can be used as stabilizers for expansive highly plastic soils.
Highlights
IntroductionExpansive soils can be characterized by its potential for volume changes as well as can be characterized by its high strength when dry, very low strength when wet, wide and deep shrinkage cracks in the dry season, and high plasticity
Expansive soils can be characterized by its potential for volume changes as well as can be characterized by its high strength when dry, very low strength when wet, wide and deep shrinkage cracks in the dry season, and high plasticity.Expansive soils always cause problems because when they are used as foundation material for engineering structures such as subgrade for pavement structures, the latter are liable to suffer some distress and damage due to the excessive volume changes of the soil profiles
Considering the important of utilization of locally available materials as an alternative soil stabilization material, the purpose of the experimental work in this study is to investigate the effects of addition of locally granite cutting powder waste and locally fine silica sand materials on Atterberg limits, and free swell characteristics of mas.ccsenet.org
Summary
Expansive soils can be characterized by its potential for volume changes as well as can be characterized by its high strength when dry, very low strength when wet, wide and deep shrinkage cracks in the dry season, and high plasticity. Expansive soils always cause problems because when they are used as foundation material for engineering structures such as subgrade for pavement structures, the latter are liable to suffer some distress and damage due to the excessive volume changes of the soil profiles. The need for economic soil stabilizers materials and economic waste disposal cost has led to intense global research towards economic utilization of locally available materials and industry wastes for engineering purposes. Recent trend in research works in the field of construction materials focused more on the use of potentially materials that are cheap and locally available such as industry wastes as additives materials for improvement of the soils properties such as Monica et al, Talal Masoud et al, Gupta Chayanet al., Sabat, Sabat and Nanda, Ravi Shanker Mishra, M.
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