摘要
以河套灌区的水泥砂浆复合土作为研究对象,通过研究掺砂量与强度之间的关系,找出工程适应性相对较好的掺砂量;同时对不同掺砂量和不同龄期的水泥砂浆复合土进行无侧限抗压强度、变形特性及微观结构试验分析,得出掺砂量和龄期对水泥砂浆复合土的强度和变形特性的影响规律。研究结果表明:在水泥土中掺入一定量的砂,可有效地提高水泥土强度,改善水泥土结构;一定水泥掺量下,存在一个最佳掺砂量,使得水泥砂浆复合土强度最高,且应力–应变曲线均有明显的峰值。
Taking cement mortar composite soil in Hetao irrigation district as research object, relationship between amount of mixed sand and the strength is studied, aiming to find the suitable sand amount mixed in the cement mortar composite soil which has good engineering adaptability. Meanwhile, unconfined compressive strength, deformation characteristics and the microcosmic structure of cement mortar composite soil with different amounts of mixed sand and ages are analyzed. The laws of strength and deformation characteristics of cement mortar composite soil are influenced by amount of mixed sand and age of sand are obtained. The results show that, if a certain amount of sand is mixed in the cement mortar composite soil, strength of cement soil improves effectively, as well as structure of cement-soil. There is an optimal amount of mixed sand in the certain cement content which makes cement mortar composite soil having the highest strength and the stress-strain curves all showing peak values.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2012年第A01期3264-3269,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(51069008)
内蒙古农业大学博士基金资助项目(BJ09–24)
关键词
土力学
水泥砂浆复合土
早期结构
掺砂量
无侧限抗压强度
微观结构
soil mechanics
cement mortar composite soil
early structure
amount of mixed sand
unconfinedcompressive strength
microstructure
