Soil Stabilisation Using Third Generation Polymers

Abstract

Currently, the demand for ground engineering techniques that do not interfere negatively with the environment is a priority. The stabilisation of soils is no exception. This work reflects the study of third generation polymers to stabilise wall holes, a backup application to bentonite that does not cause any environmental disturbance in the region. Since the stabilisation of soils is influenced by many factors, the present work refers to the realisation of various laboratory tests to characterise five different soils (A to E) to assess the behaviour of the polymer in different scenarios (blends soil/polymer). Laboratory tests were carried out for soil characterisation. Based on the study carried out, it was possible to conclude that the polymer used in this work could ensure stabilisation in sandy soils. However, the existence of fines in its composition interferes with its effectiveness. The silty and the polymer clay soils improve the ability of sedimentation, as well as the limits of consistency, though, can connect these soil particles neither bring better stabilisation. It was also possible to verify that the application of only 0.5 g of polymer in 1 L of water brings significant benefits for both sedimentation and the equivalent of sand. For this reason, other blend ratios were tested, trying to use a lower concentration of polymer in order to optimise the cost-benefit of the entire process.