Abstract
In the present study, the effect of inclusion of waste crumb rubber and cement on the unconfined compressive strength and wet-dry durability of clayey soil has been investigated. Crumb rubber and cement were added to clayey soil at ranges of 2.5%-10% and 3%-6% respectively. The results of the investigation revealed that the incorporation of crumb rubber influenced the unconfined compressive strength, axial strain at failure, energy absorption capacity and wet-dry durability of the cement-stabilized clay. The study reveals that as the content of crumb rubber in the cement-stabilized clayey soil increases the unconfined compressive strength decreases but prosperously changes the behavior of the cement-stabilized clay from brittle to ductile. The axial strain corresponding to peak axial stress and energy absorption capacity of the specimens can be increased by limiting the content of crumb rubber up to 5%. The weight loss of the cement-stabilized clay mixed with crumb rubber increases as the content of crumb rubber increases. With the prolongation of the curing period, the weight loss of cement-stabilized clay mixed with crumb rubber decreases. Further, the weight loss of 90 days cured specimens of clayey soil incorporated with 6% cement and crumb rubber up to 5% meets the recommendation of the material to be used in construction of road pavements as a base, sub-base, and shoulder. Most importantly, the utilization/disposal of this hazardous waste material reduces its impact on environment and health.
Highlights
The Industrialization and urbanization have been the two worldwide phenomena in the present century
The optimum moisture content (OMC) of the clay is 20.89%, which reduces to 20.45%, 19.38%, 18.96%, and 18.38% with the addition of 2.5%, 5%, 7.5%, and 10% rubber, respectively
In the present paper, unconfined compressive strength, and wet-dry durability characteristics of the clayey soil incorporated with crumb rubber and cement were investigated
Summary
The Industrialization and urbanization have been the two worldwide phenomena in the present century. Various investigators (Al-Tabbaa et al, 1997; Cokca and Yilmaz, 2004; Akbulut et al, 2007; Robani and Chan, 2008; Ho and Chan, 2010; Cabalar et al, 2014; Srivastava et al, 2014; Wang and Song, 2015; Beena et al, 2016) had studied the effect of inclusion of waste rubber tire on the unconfined compressive strength of the cohesive soils. Guleria and Dutta (2012) observed the decrease in the unconfined compressive strength of the fly ash-limegypsum mixture with increase in dry/wet tire chip content (5% to 15%) citing two possible reasons: (i) non polar nature of rubber, which entrap air during the mixing and (ii) negligible load taking ability of rubber as compared to the hardened mix. The elastic compression of the crumb rubber was attributed as a reason for such behavior. Cabalar et al (2014) carried out
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