Shear strength parameters of sand-tire chips mixtures
Öz
Used tires are unwanted wastes especially in urban areas and their extent is growing every year. With the development of human societies and the increasing use of automobiles, every year millions of used tires are collected as garbage around the world and leave the consumption cycle. However, they can be used by mixing with soil, one of the basic building materials, to improve their mechanical properties. This article discusses the effect of adding tire chips on the shear strength properties of high-friction sand. Different mixing ratios of the sand-tire chips mixture by weight (100: 0, 97.5: 2.5, 95: 5, 92.5: 7.5 and 90:10) were used. The Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) of sand and different sand-tire chip mixtures were determined by the standard Proctor test. Samples were prepared under OMC and MDD conditions and direct shear box test was performed on sand and sand-tire chip mixtures under three different axial stresses. The results showed that when the percentage of tire chips reaches 5%, the internal friction angle was increased by 13.8% and cohesion was decreased by 66.4%. After this point internal friction angle was decreased and cohesion increased slightly.
Anahtar Kelimeler
High friction sand, Proctor compaction test, Shear strength parameters, Shear box test, Tire chips
Kaynakça
- Ahmed, I. (1992). Laboratory study on properties of rubber-soils. fınal report. Department of Civil Engineering, Purdue Univiversity, Indiana, USA, 47907.
- Ahmed, I., Lovell, C. (1993). Rubber soils as lightweight geomaterials. Transportation research record, 1422, 61-70.
- Akbulut, S., Arasan, S. and Kalkan, E. (2007). Modification of clayey soils using scrap tire rubber and synthetic fibers. Applied Clay Science, 38(1-2), 23-32. https://doi.org/10.1016/j.clay.2007.02.001
- Annadurai, R. and KannanRajkumar, P. (2014). Study on effect of crumb rubber on cehavior of soil. International Journal of Geomatics and Geosciences, 4 (3), 579-584.
- Anvari, S.M., Shooshpasha, I. and Kutanaei, S.S. (2017). Effect of granulated rubber on shear strength of fine-grained sand. Journal of Rock Mechanics and Geotechnical Engineering, 9 (5), 936-944. https://doi.org/10.1016/j.jrmge.2017.03.008
- ASTM C1444-00. (2001). Standard method for measuring the angle of repose of free-flowing mold powders. ASTM International, West Conshohocken, PA, USA.
- ASTM D3080. (2011). Standard test method for direct shear test of soils under consolidated drained conditions. ASTM International, West Conshohocken, PA, USA.
- ASTM D854. (2014). Standard test methods for specific gravity of soil solids by water pycnometer. ASTM International, West Conshohocken, PA, USA.
- ASTM D4254-91. (2006). Standard test methods for minimum index density and unit weight of soils and calculation of relative density. ASTM International,West Conshohocken, PA, USA.
- ASTM D698. (2007). Standard test methods for laboratory compaction characteristics of soil. ASTM International, West Conshohocken, PA, USA.