Evaluation of Lime-Treated Lateritic Soil for Reservoir Shoreline Stabilization

Abstract

Sedimentation is one of the major problems addressed by reservoir management, and requires extensive effort to control it. This paper aims to evaluate the efficiency of the soil–lime stabilization technique for reservoir shores. The treatment consisted of spraying hydrated lime in slurry form over the surface of a lateritic clay sample with 1, 2, and 4% lime solution and curing times of 1, 7, 28, and 56 days with air-drying and moist-room storage. In addition, a single test with less than 1% lime solution by weight percentage was carried out. The post-cured specimens were mapped with SEM and X-ray analyses. A wave flume test was performed in samples subjected to diverse conditions of lime content, type, and curing time. The results showed that the present technique produces a Ca-rich crust by carbonation rather than stabilizing it and that the lime content and type of curing generate improvements in soil loss reduction, but the curing time does not. The technique gave relative protection against water level variation and wave impacts, but it is necessary to consider a frequent application of lime on the lateritic soil.

Mechanical Behavior of Hydrated-Lime–Liquid-Stabilizer-Treated Granular Lateritic Soils

“…Figure 15 shows SEM images of the raw granular lateritic soil, hydrate lime, and ZL-2A stabilizer. Quartz and kaolinite were observed in the lateritic soil, which is consistent with previous research [41], and numerous calcium crystals were observed in the lime sample. The dehydrated ZL-2A stabilizer resembled a pile ball and had numerous cilia on its surface, which is a mixture of high-molecular-weight organic matter and inorganic matter such as sodium hydroxide.…”

“…Figure 15 shows SEM images of the raw granular lateritic soil, hydrate lime, and ZL-2A stabilizer. Quartz and kaolinite were observed in the lateritic soil, which is consistent with previous research [41], and numerous calcium crystals were observed in the lime…”