Expansive soil is strongly influenced by the water content inside the soil particle , the significant changes of moisture content cause volume changes. The swelling and shrinkage potential of the soil can be indirectly identified by running the consistency limits test which are by controlling the plasticity index (IP) value and shrinkage limit (SL) value. This research aims to determine the value of liquid limit (LL), plastic limit (PL), plasticity index (IP), and shrinkage limit (SL) of soil-bentonite mixtures as…

Abstract The Spatial Autocorrelation (SPAC) method is considered a robust method for site characterization and seismic hazard assessment, being a nondestructive but credible method for determining subsurface shear wave velocity profiles. This research uses the SPAC method to obtain the 1D profile that focuses mainly on theory and the direct fitting of spatial autocorrelation coefficients, which leads to a higher accuracy with the employment of Rayleigh wave modes for both fundamental and higher modes. The field se…

A common problem often encountered in infrastructure development, especially in tunnelling projects, involves non-cohesive soils with high groundwater levels. In tunnelling projects, the existence of non-cohesive soil is very susceptible to collapse, hindering work and even causing loss of life and damage to buildings around the construction area. To prevent such a non-cohesive soil collapse, a barrier or temporary wall is needed for the jacking installation to be carried out safely. An efficient method to achieve…

This study investigates the erosion resistance of cement-bentonite (CB) barriers, focusing on the role of varying levels of Ground Granulated Blast Furnace Slag (GGBS) content and confining pressure, crucial for infrastructure such as dams and levees. Employing a bespoke modified triaxial erosion testing setup, the research assesses how different confining pressures, GGBS proportions, and curing periods impact the erosion resistance of CB materials under varying stress conditions. Results demonstrate that increasi…

Infrastructure development often faces challenges due to soils with low bearing capacity, which can potentially cause instability and subsidence and threaten the safety of structures. Therefore, an efficient and environmentally friendly stabilization method is required. This study aims to evaluate the effectiveness of Microbial Induced Calcite Precipitation (MICP) in improving bearing capacity and soil strength through the formation of bacterial soil columns. This study employed a full-scale physical model test us…