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研究无机胶凝材料、有机聚合物和植物纤维3种改性措施对黄河泥沙基生土材料抗压强度、软化系数和微观结构的影响。结果表明,采用传统的振捣成型自然养护工艺,按m(活化泥沙)∶m(无机胶凝材料)∶m(砂)=65∶25∶10配比,再掺加1.8%聚丙烯酸钙和0.8%黄麻纤维,可制备出抗压强度达13.9 MPa,软化系数为0.88的生土材料;SEM和EDS分析显示,改性后黄河泥沙颗粒得到良好固结,拔出黄麻纤维与基体材料粘结紧密;无机水化产物、有机聚合物和植物纤维协同作用,形成连续、半连续和互相搭接的3套网络结构体系,共同固结强化黄河泥沙。
The effects of three kinds of modification measures, inorganic gelling materials, organic polymers and plant fibers, on the compressive strength, softening coefficient and microstructure of the Yellow River silt-based raw soil were studied. The results show that using traditional vibrating molding natural curing process, m (activated sediment): m (inorganic cementitious material): m (sand) = 65:25:10 ratio, and then mixed with 1.8% calcium polyacrylate And 0.8% jute fiber, a raw material with a compressive strength of 13.9 MPa and a softening coefficient of 0.88 was prepared. SEM and EDS analysis showed that the sediment of the Yellow River was well consolidated and the jute fiber and the matrix material Which are closely bonded. Inorganic hydration products, organic polymers and plant fibers work synergistically to form three sets of network structure systems that are continuous, semi-continuous and overlapping with each other to consolidate the Yellow River sediment.