摘要
为探究一种水泥基复合固化剂对黏土的改性效果,采用无侧限抗压强度和干湿循环试验,系统研究了固化剂与水泥的不同配比对固化土力学强度与耐久性的影响规律。研究表明,水泥与复合固化剂之间存在一个最佳配比,在此配比下固化土的无侧限抗压强度达到峰值;提高水泥或复合固化剂的掺量能显著提升土体的抗干湿循环耐久性,但过高的掺量反而会导致耐久性的劣化。微观分析表明该水泥基复合固化剂通过填充土壤颗粒间隙并形成空间网络结构,是提升其宏观力学性能与干湿循环耐久性的主要原因。
To investigate the performance enhancement of a novel cement-based composite stabilizer on clay,this study systematically examined the effects of different mix ratios of the stabilizer and cement on the mechanical strength and durability of the stabilized soil using Unconfined Compressive Strength(UCS)and wet-dry(W-D)cycle tests.The results indicate that an optimal mix ratio exists,at which the UCS of the stabilized soil is maximized.The addition of the composite stabilizer significantly improves the durability of the cement-soil against W-D cycles.However,this effect is non-linear,with excessively high dosages leading to a deterioration in durability.Microstructural analysis revealed that the enhancement of macroscopic mechanical performance and durability is primarily attributed to the formation of a dense spatial network structure that fills the inter-particle voids of the soil.
作者
赵晨
ZHAO Chen(Hebei Jiaotou Zhiyuan Engineering Consulting Co.,Ltd.,Hebei Shijiazhuang 050000 China)
关键词
水泥基复合固化剂
固化土
干湿循环
无侧限抗压强度
微观结构
cement-based composite stabilizer
stabilized soil
wet-dry cycles
unconfined compressive strength
microstructure
作者简介
赵晨(1988-),男,河北石家庄人,助理工程师。
