TY - JOUR A2 - Zhou, Jia-wen AU - Li, Fengyuan AU - Wang, Chaojie AU - Xia, Yangyang AU - Hao, Yanjie AU - Zhao, Peng AU - Shi, Mingsheng PY - 2020 DA - 2020/09/18 TI - Strength and Solidification Mechanism of Silt Solidified by Polyurethane SP - 8824524 VL - 2020 AB - To determine the mechanism and strength characteristics of solidification of silt by a permeable polyurethane grouting material, the effects of polymer content, soil moisture, and immersion time on the unconfined compressive strength (UCS) of the silt have been studied. The results showed that the permeable polymer grouting material can significantly improve the performance of silt: (1) A higher amount of polymer produced a greater strength in the solidified soil. (2) The strength of the solidified soil increased as the immersion time was increased. (3) Moisture in the soil was not conducive to improving the strength of the solidified soil. The X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) have proven that polyurethane does not react with the silt, but they could improve the strength of the silt through physical action. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were performed to find that polymers can reduce soil porosity, and the addition of polyurethane improved the strength of the silt mainly through adhesion, wrapping, filling, and bridging. SN - 1687-8086 UR - https://doi.org/10.1155/2020/8824524 DO - 10.1155/2020/8824524 JF - Advances in Civil Engineering PB - Hindawi KW - ER -