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Part of Springer Nature. This stress/pressure results in signs and symptoms that can be traced directly back to foundation issues instigated by expansive soil. 1 is that the upper layer is assumed swelling, as opposed to settling. Second, the drainage role is facilitated by the high permeability of the granular material. Journal of Research and Reviews in applied Science 1:209217, Dash SK, Hussain M (2012) Lime Stabilization of Soils: Reappraisal. Expansive soil is generally a clay that is inherently susceptible to swelling and shrinking due to its chemical composition. Inexpensive Definition & Meaning | Dictionary.com A threshold value of the ratio C c /C s was identified to distinguish between expansive clay specimens and non-expansive clay specimens. Elarabi, H. (2010). Destruction of hydraulic structures such as buried pipelines, drains, sewage systems and irrigation systems are very dangerous and can be fatal in certain conditions. Determination of liquid and plastic limit (second revision), IS: 2720 (Part 26)-1987. However, that large-scale view is not very useful for individual construction projects. (A) Swelling evolution of an expansive clay (Case 1) under different loads. According to the classification by Chen (1975), the physical parameters of this sample, given in Table 4, indicate that it has a medium swell potential. doi:10.1080/19648189.2017.1320236. Expansive Soil Causes Basement & Foundation Problems - Geology Read the following articles to get a better understanding of the signs and symptoms: If you think that you might have expansive soils and are concerned it might be impacting your home, health, or peace of mind, click on our link below for a FREE foundation inspection if you live in Central AZ or Southern California , Your email address will not be published. J Eng Geol 42(1996):223237, CrossRef Comparison of Cc/Cs ratio method to others methods. The following table gives the swelling potential of soil as low, medium, high and very high from which we can identify the soil as swelling type or not. These areas are underlain by soils with little to no clays with swelling potential. Accessed March 19, 2015. Property Risk Assessment for Expansive Soils in Louisiana. Some minerals actually have chemical compositions that attract and bond to water molecules. Geology.com. As ions are retained by clay particles in expansive soils (Figure 2B), there is a movement of water from low ionic concentration areas to high ionic concentration areas inside the clay. Numerical Modeling of Retaining Wall Resting on Expansive Soil. Large cracks and fissures can also develop in the soil. New York: Elsevier Publisher B.V. Chen, F. H. (1965). Hence, studying the behaviour of foundations on expansive soils is a theme of high interest, in particular for many African countries (Kalantari, 2012; Nelson et al., 2015; Sridharan and Prakash, 2016). While many types of clays expand when they come in contact with water, not all do. In: Proceedings of 6th regional conference Africa on Soil mechanics and foundation engineering, Durban, South Africa, Osinubi KJ, Katte VY (1997) Effect of elapsed time after mixing on grain size and plasticity characteristic, I: soil-lime mixe.