信阳师范大学学报（自然科学版）2025，Vol.38Issue(3)：249-256,8.DOI:10.3969/j.issn.2097-583X.2025.03.001
江底吸泥道路底基层材料矿物组成与微观结构演化规律
Deformation characteristics and microstructural evolution patterns of riverbed silt as road subbase material
摘要
Abstract
A solidification/stabilization approach was employed to modify riverbed silt,synthesizing it into road subbase material.The macroscopic properties and microscopic structural changes of the material were comprehensively analyzed through unconfined compressive strength tests,mineral structure composition analysis,pore structure tests and X-ray photoelectron spectroscopy.The experimental results indicated that the material achieved an unconfined compressive strength of 4.0 MPa at 28 d.The optimal mass fraction of the binder was found to be 63%slag,21%fly ash,14%activator and 2%activator.The mineral composition was dominated by quartz and clinoptilolite,while the pore structure conforms to type Ⅳ isotherms,H3 hysteresis loop,with a maximum adsorption capacity of 40.52 cm3/g.Additionally,the material generated substances such as SiO2(Al2O3)2.1,SiO2(Al2O3)0.55,CaSiO3 and CaCO3,contributing to the enhancement of strength.The results showed that modification and activation can effectively enhance the chemical activity of sediment absorption at the bottom of the river,meeting the minimum strength limit requirements of road subbase materials in the"Construction and Quality Acceptance Specification for Urban Road Engineering(CJJ1-2008)",and can be used as road subbase filler.关键词
江底吸泥/道路材料/固化/抗压强度/微观结构Key words
riverbed silt/road material/solidification/compressive strength/microscopic structure分类
建筑与水利引用本文复制引用
罗齐鸣,王子雄,董祎挈,臧濛..江底吸泥道路底基层材料矿物组成与微观结构演化规律[J].信阳师范大学学报（自然科学版）,2025,38(3):249-256,8.基金项目
国家自然科学基金青年科学基金项目(11802215) （11802215）
湖北省自然科学基金创新群体项目(2022CFA011) （2022CFA011）
