No abstract

No abstract

The investigation aims to check the effect of variation of gypsum and water content on the engineering properties of expansive soil by different experiments, namely, mini compaction test, Atterberg limit's test, and unconfined compressive strength test along with microstructural analysis. The effect of gypsum (0%, 2%, 4%, 6%, 8%, and 10%), water content (ω opt − 3%, ω opt , and ω opt + 3%), and curing period up to 28 days on the strength of bentonite-gypsum mixtures was highlighted. The results of bentonite-gypsum mixtures showed an increment in maximum dry unit weight and decrement in the optimum water content up to 4% inclusion of gypsum. A gradual reduction in the liquid limit and plastic limit of bentonite-gypsum mixtures was observed with the increase in gypsum content and curing period. The unconfined compressive strength of the bentonite-gypsum mixtures increased continuously with the increase in gypsum content, water content, and curing period. The microstructural behavior of bentonite-gypsum mixtures showed evidence of pozzolanic product formation along with densification of the composite. The multiple regression analysis was also carried out to establish the relationship between the strength and maximum dry unit weight, liquidity index, and the additive content as well as curing period.

No abstract

No abstract