Study on Microstructure of Cemented Organic Soil in Dianchi Lake, China

The organic soil in the Dianchi Lake area contains much humic acid (HA), and impact of HA on cemented has attracted attention. In this study, test is prepared based actual content Lake, cement added to prepare samples. Unconfined compressive strength (UCS), scanning electron microscopy (SEM), energy-dispersive analysis (EDS), X-ray diffraction (XRD) tests are conducted development microstructure changes studied. results show that (1) decreases with increase increases mixing ratio; (2) SEM EDS content, connection between particles gradually changed from surface–surface point–surface, point–edge, or point–point connection. A large overhead structure inside soil, its integrity weakens increased content. However, elements such as Ca, Si, Al exist pores indicating hydration products particles. XRD testing shows intensity peaks decrease. (3) general, will deteriorate reduce strength. When more than 15%, effect prominent. increasing ratio can effectively weaken HA’s negative soil’s 15% 25%, high be increased. approach not conducive protection environment.