Assessment of strength development in cement-admixed artificial organic soil with GX07

Abstract

To explore the stabilization effect of stabilizing agent GX07 on treating organic soil and the influence of organic matter on the strength development of stabilized soil, artificial organic soil with various organic matter content was obtained by adding different amounts of fulvic acid into non-organic clay, and then liquid-plastic limit tests were carried out on the artificial organic soil. Meanwhile, unconfined compressive strength (UCS) tests were performed on cement-only soil and composite stabilized soil, respectively. The test results indicate that the plastic limit of soil samples increases linearly, and the liquid limit increases exponentially as the organic matter content increases. The strength of stabilized soil is well correlated with the organic matter content, cement content, stabilizing agent content and curing time. When the organic matter content is 6%, as the cement content varies in the range of 10%–20%, the strength of cement-only soil increases from 88.5 to 280.8 kPa. Once 12.6% GX07 is added into the mix, the strength of stabilized soil is 4.93 times compared with that of cement-only soil. GX07 can obviously improve the strength of cemented-soil and has a good economic applicability. A strength model is proposed to predict strength development.