Abstract
The failures of industrial buildings caused by alkali contamination of soils necessitate better understanding of their behaviour and proper control measures. In this paper an attempt has been made with GGBS to control the effect of alkali induced swell in kaolinitic soils. Three soils namely red earth, ball clay and china clay, which are non-swelling in nature and predominantly containing kaolinite mineral of varying amount, were considered for the study. Free swell tests were conducted on soils with 4N NaOH solution as pore fluid. The results showed that the dispersive nature of kaolinite clay particles under alkaline conditions along with mineral alterations resulted in the high swelling in kaolinitic soils. GGBS treated soils showed considerable reduction in swelling during alkali contamination and the percentage of GGBS required for controlling the swelling varied with the type of soil. The reduction in swelling with GGBS is attributed to the calcium alumina silicate mineral formations.
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