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Erosion-resistance performance of SG-1 soil stabilizer-stabilized gravel soil compared with cement-stabilized gravel soil
Published in Xianhua Chen, Jun Yang, Markus Oeser, Haopeng Wang, Functional Pavements, 2020
Yulong Zhao, Zhizhong Zhao, Shuya Xie, Yiluo Zhang, Shaoquan Wang
Inorganic binder stabilized materials such as cement and lime, which are commonly used in road bases in our country, have poor anti-scouring ability and are easy to cause road water damage after being washed by water (Nie, 2009). Studies have shown that adding fly ash to cement stabilized gravel soil can reduce the amount of cement when the same soil stabilizing effect is obtained (Zhang et al., 2011; Jongpratist et al., 2009). Moreover, the mechanical properties and durability of composite soil stabilizer stabilized gravel soil are better than those of cement stabilized macadam (Zhao et al., 2016). Using soil stabilizer to stabilize gravel soil instead of a certain amount of cement and lime to stabilize natural gravel soil as road material can reduce the cost of construction and reduce ecological damage. It is necessary to study the ability of erosion-resistance of the soil stabilizer stabilized gravel soil. Therefore, the purpose of this study is to study the erosion-resistance performance of stabilized gravel soil with different content of binder and different gradation through erosion-resistance test, and the comparative results are given.
Improvements in the mechanical behavior of a silty soil treated with rice husk silica, lime, and polypropylene fiber
Published in International Journal of Geotechnical Engineering, 2023
Jessica Leindorf de Almeida, Yeimy Muñoz Ordoñez, Paula Caroline Alves Pudell, Daniel Leal Brandão, Monigleicia Alcalde Orioli, Ronaldo Luis dos Santos Izzo
A more economical soil stabilizer is lime. However, after cement, lime production is the highest source of CO2 emissions due to its calcination stage (Despotou et al. 2016; Shan, Liu, and Guan 2016). The only benefit of using lime instead of cement is that when the lime is applied in soil stabilization, it can also absorb CO2 from the atmosphere during its carbonation reaction, helping to reduce the environmental impact of the material (Bing et al. 2022).
Effects of waste tire textile fibres on geotechnical properties of compacted lime-stabilized low plastic clays
Published in International Journal of Geotechnical Engineering, 2021
Ali Akbar Habibi, Mehdi Fallah Tafti, Shayan Narani, Mohsen Abbaspour
The review of previous studies indicates that they were mainly focused on the application of the rubber component of tire wastes, rather than its recycled fibre component. However, tires of the heavy vehicles also consist of textile fibres that are responsible for reinforcing the tires and have not been widely investigated as reinforcement materials in geotechnical projects. Abbaspour et al. (2019) named this waste material Waste Tire Textile Fibres (WTTFs) and evaluated its influence on different types of soils. The researchers reported an initial decrease in UCS as a result of WTTF incorporation up to a fibre content of 1% and a slight increase at higher contents. Moreover, STS was decreased at the fibre content of 1% but increased remarkably at higher contents. CBR was decreased up to a fibre content of 2% and increased marginally afterwards. In other studies, WTTFs were proven to be suitable reinforcement materials for reinforcing swelling soils (Abbaspour et al. 2020b), using as landfill covers (Narani et al. 2020a), and used as subgrade soils (Abbaspour et al. 2020a; S. S. Narani et al., 2020b). Despite the favourable influence of WTTFs, the simultaneous application of these waste fibres with stabilizers has not been considered in the previous studies. In order to fill this gap, in this study, the applicability of simultaneous fibre-reinforcement and lime-stabilization of two clayey soils was investigated through a set of experimental investigations (i.e., standard compaction, UCS, STS, CBR, and direct shear test). Basically, clays are not suitable materials in many engineering projects due to their low strength and stiffness properties. Therefore, in many cases, the engineers have to seek and apply different methods to prepare the clayey soils for construction. The idea in this paper is that the concurrent use of lime as a soil stabilizer and the recycled tire fibres as soil reinforcement materials can produce synergy in improving the mechanical properties of these soils. Moreover, the brittleness of the lime-treated clayey soil can be reduced by the favourable effect of fibres. Two types of clayey soils are tested in order to investigate the effect of clay content and pozzolanic process on soil-fibre-lime interaction. In economic terms, both materials are largely available and cheap and therefore, this approach would be a cost-effective method for the improvement of this type of soils.