Expansive soil improvement of Glagahagung village, Purwoharjo sub-district, Banyuwangi district, which is chemically stabilized

Abstract

Abstract. Expansive soil can be easily found at Purwoharjo, a sub-district of Banyuwangi. Swelling and shrinkage behavior of the soil is usually referred to by the local community as a "moving soil" phenomenon. It causes cracks on a number of buildings which is a major issue in that area. Various methods of expansive soil stabilization are available. This work intends to lay comparisons on stabilizations using wood charcoal powder and salt. The stabilizing materials are mixed with the soils under different proportion. Volume weight, index properties, and dry density are parameters to be investigated during the stabilization process. The results show that salt stabilized expansive soil is better than wood charcoal powder. 15% proportion of salt to soils weight increases the density by about 20%. Meanwhile, the stabilized soil is as a result of change to low plasticity silt (ML) from previously high plasticity soil (CH) of the original one.

The Role of Electrochemistry and Mineralogy in the Geotechnical Behavior of Salinized Soils

“…While the kaolinite-rich material shows GI variations above the 0.6% concentration, it appears that GI occurs immediately with the salinization of the smectite-rich material. Data and findings in the present research follow those obtained by Putra et al (2018), in which expansive soils have their IG markedly decreased.…”

“…Sen et al (2016) also found a decrease in PI values in kaolinitic and smectitic materials in experiments with saline solutions of NaCl, CaCl 2 , and MgCl 2 . Putra et al (2018) also showed a marked AI reduction against NaCl concentration increase.…”