纤维加筋固化黄土的抗拉强度及加筋机理

摘要

The tensile strength characteristics and reinforcement mechanism of cement,curing agent and multiple fiber composite cured loess were investigated by tensile strength test and microscopic test.Results show that the tensile strength of cement stabilized soil is higher than that of cement lime stabilized soil and Changda stabilized soil.The tensile strength of cement stabilized soil increases with the increase of cement content,and the tensile strength of cement stabilized soil with different cement content is higher when the fiber content is 0.45％.The tensile strength of 12 mm modified polypropylene fiber reinforced soil is higher,and the hybrid fiber cannot significantly improve the unconfined tensile strength of the solidified soil.%通过无侧限劈裂抗拉强度试验及微观形貌试验,探究了水泥、固化剂,以及多种纤维复合固化黄土的抗拉强度特性及其加筋机理.结果表明,水泥固化土劈裂抗拉强度高于水泥石灰固化土和长大固化土;水泥固化土的劈裂抗拉强度随水泥掺量的增加而增大,不同水泥掺量的水泥固化土的劈裂抗拉强度在纤维掺量为0.45％时强度较高;12 mm改性聚丙烯纤维加筋固化土劈裂抗拉强度较高,混杂纤维的不能显著提高固化土的无侧限劈裂抗拉强度.