Hydrophobic modification of an expansive soil using polymers and organic compounds: a comparative study with lime

A novel expansive soil hardener: performance and mechanism of immersion stability

“… 20 According to the study of Shi B. et al , 21 after the addition of 5–10% quicklime into expansive soils for improvement, their free expansion rate and strength can meet the requirements of engineering use, but the immersion stability of quicklime soils is obviously insufficient, which cannot meet the actual engineering application in rainy climate areas and lead to engineering problems. 22 The slag soil hardener (hereinafter referred to as “SSH”) is a silicon aluminum-based environmental material developed by Wuhan University, China, which contains a variety of high-state cations, has good hydrorigid cementitious properties, and can effectively solidify sands, soils and other construction waste materials to recycle in actual engineering construction. Therefore, SSH was tried to be applied to the research of expansive soils to explore the solution of the problem of insufficient immersion stability.…”

Optimising the hydrophobicity of sands by silanisation and powder coating

“…Rendering soil particles hydrophobic by mixing with chemical additives is known to reduce the expansion of swelling clays (Hernandez et al 2005), influence the capillary rise in fine silt (Orozco and Caicedo, 2017) and in sands, to alter their electrical conductivity (Dong and Pamukcu, 2015) and their evaporation rate (Kim et al 2015). With sands, hydrophobisation can also lead to several geotechnical applications, as barriers at the soil-atmosphere-vegetation and at soil-structure interfaces.…”