Strength and Durability of Lime-Treated Jarosite Waste Exposed to Freeze and Thaw: Fid-Bau Portal

Strength and Durability of Lime-Treated Jarosite Waste Exposed to Freeze and Thaw

Gupta, Chayan / Prasad, Arun

An alternate freezing and thawing cycle (F-T) is a weathering process that is very common in cold regions. In a laboratory, the durability of any stabilized or nonstabilized material can be studied by subjecting the material to alternate cycles of freezing and thawing. In this study, a study of strength and durability of lime-treated jarosite waste exposed to freezing and thawing is investigated. Jarosite with different ratios of lime is compacted in the laboratory and exposed to a maximum of five freezing and thawing cycles. In addition, an attempt has been made to quantify the potential of lime, F-T cycle, and ratio of F-T cycle (C)/curing period (t), in the assessment of unconfined compressive strength ( $q_{u}$ ) and split tensile strength ( $q_{t}$ ) of lime-treated jarosite. A number of unconfined compressive and splitting tensile strength tests are carried out on jarosite samples stabilized with various lime contents. The results show that both $q_{u}$ and $q_{t}$ increase polynomially with the increase in lime content (L), and a power function has been fitted to assess the optimum relationship between $q_{u}$ and C/t ratio, as well as between $q_{t}$ and C/t ratio. It is observed that for the relationship among $q_{u}$ , L, and C/t, as well as $q_{t}$ , L, and C/t, the optimum fit could be obtained after applying a power equal to 1.3 to the lime content (L) parameter and $- 0.25$ to the C/t ratio parameter. Finally, a unique relationship between $q_{t}$ and $q_{u}$ is also established, i.e., $q_{t} / q_{u} = 0.17$ , being independent of the parameters C/t ratio and lime content (L).