Experimental Investigation of the Densification Properties of Clay Soil Mixes with Tire Waste

Abstract

The annual increase in production of industrial wastes, including scrap tire, has created several challenges for societies. Incorporating the wastes as raw materials has been proposed in different industries, using waste tire as physical additives and investigating the geotechnical properties of this mixture can reduce the environmental pollution, as well as offering economic and technical benefits. Clay soils are abundant in southern regions of Tehran where scrap tire is also produced in large quantities every year. Therefore, provided the chance, incorporating these wastes into the soil mix is significant as regards both geotechnical properties and environmental considerations. As a fundamental means of investigation in construction activities, in particular road construction, the compaction test is useful in determining the maximum density and the optimum moisture content of the soil. In this study, considering that this research has not yet been investigated for Tehran clay and has environmental benefits while having engineering application, the optimum moisture content and maximum dry density of the clay mixed with two types of additives (waste tire powder and granules) at various mass fractions (2, 4, 6, 8, 10, 20, and 30 wt%) using standard compaction tests were investigated. The results suggested that the variations of the optimum moisture content and the maximum dry density in both clay mixes demonstrate a certain and predictable trend as the waste content increases. In other words, by increasing the percentage of waste in the mixture, the optimum moisture content is increased, and this increase in the mixture of the tire powder and clay is more than granule and clay. In addition, by increasing the percentage of waste, the maximum dry weight of the mixture was reduced, and this reduction in the mixture of tire powder and clay is almost higher than that of tire granule and clay. Furthermore, relations were presented to estimate the maximum density and the optimum moisture content of the mix to be applied in practice.

Experimental Study Using Recycled Waste Tyre as Sustainable Clay Soil Stabilisation

“…The CBR values were also increased considerably where unsoaked CBR value was found to be maximum at 10.65% for 12% shredded tyre while soaked CBR value was found to be maximum at 6.84% for 12% shredded tyre. Akbarimehr et al [11] investigated the effect of waste tyre granules and powdered formed on Tehran clay soil. The waste tyres were added at 2, 4, 6, 8, 10, 20 and 30% weight and Proctor compaction tests were performed.…”

Assessment of glass fiber-reinforced polyester pipe powder in soil improvement

“…Industrial waste materials have been employed as additives to improve the properties of soils. In previous studies on soil improvement, some additives that were commonly used for this purpose, including recycled asphalt pavement (RAP) [10,11], cement by-pass dust, also known as cement kiln dust (CKD) [12,13], pond ash (PA) [14], steel slag (SS) [15][16][17], end-of-life tires (ELT) [18][19][20], fly ash (FA) [21,22], rice husk ash (RHA) [23,24], waste stone powder (WSP) [25,26], construction and demolition waste (CDW) [27][28][29], waste glass (WG) [30][31][32][33], and coffee wastes (CW) [34,35]. These studies have shown that using recycled or waste materials is effective in increasing the engineering properties of soil mixtures and providing a quality control method for their applications in the field.…”

Enhancing the Strength of Sandy Soil Through Enzyme-Induced Calcite Precipitation

“…Conventional soil improvement techniques, such as densification, dynamic compaction, stone columns, and chemical grouting have been successfully employed to enhance the engineering characteristics of various soils [1,2]. Nevertheless, these techniques have some setbacks due to their potential adverse environmental effects [3].…”