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为解决传统水泥固化剂高碳排放问题，采用矿渣与粉煤灰制备地质聚合物，用于改良公路路基粉土，并通过动三轴试验研究其动强度特性。重点研究了固化剂掺量、初始偏应力、围压及养护龄期对固化土动强度的影响。结果表明：动强度随加载次数增加呈幂函数型衰减；提高掺量、围压与龄期均能增强动强度，而初始偏应力则产生不利影响。固化剂掺量增加，有助于提高动黏聚力与动内摩擦角；龄期影响表现为前期增长迅速、后期渐缓。基于试验数据构建了动强度预测模型，经验证实测值与预测值拟合度良好，可为动力荷载条件下路基工程设计提供理论依据。
Abstract：To address the high carbon emissions associated with traditional cement-based stabilizers, this study used slag and fly ash to prepare geopolymers for improving silty soils in highway subgrades. The dynamic strength characteristics were investigated via dynamic triaxial tests, with a focus on the effects of stabilizer content, initial deviatoric stress, confining pressure, and curing age. The results show that dynamic strength decays as a power-law function of loading cycles. Increasing stabilizer content, confining pressure, and curing age enhances dynamic strength, whereas initial deviatoric stress has an adverse effect. Higher stabilizer content improves both dynamic cohesion and dynamic internal friction angle. The curing age effect is characterized by rapid growth in the early stage followed by a gradual slowdown. Based on experimental data, a dynamic strength prediction model was developed. Measured values agree well with predicted values, providing a theoretical basis for subgrade engineering design under dynamic loading conditions.
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基本信息:
中图分类号:U416.1
引用信息:
[1]胡建林,董少辉,陶喜龙,等.地质聚合物固化土的动强度及预测模型[J].铁道建筑,2026,66(07):54-60.
基金信息:
河北省高等学校科学技术研究项目（QN2024070）
2026-07-20
2026-07-20