Mechanical Properties of River Dredged Soils Stabilized with Industrial Solid Waste‑based Geopolymer Binder

WU Weijiang; GU Leilei; WANG Shengnian; WU Zhijian; ZHANG Qiang; ZHU Feng; HAI Tong

doi:10.13409/j.cnki.jdpme.20240206002

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Mechanical Properties of River Dredged Soils Stabilized with Industrial Solid Waste‑based Geopolymer Binder

更新时间：2025-07-07

- Mechanical Properties of River Dredged Soils Stabilized with Industrial Solid Waste‑based Geopolymer Binder
- Journal of Disaster Prevention and Mitigation Engineering Vol. 45, Issue 3, Pages: 643-651(2025)
- 作者机构：
  
  1.南京工业大学交通运输工程学院，江苏南京 211816
  2.中交一公局海威工程建设有限公司，北京 101119
  3.中国水利水电科学研究院水利部水工程建设与安全重点实验室，北京 100038
  4.中国安能集团第三工程局有限公司重庆分公司，重庆 401329
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20240206002
  CLC： TU442
- Received：06 February 2024，
  
  Revised：2024-04-09，
  
  Published：28 June 2025
- 稿件说明：
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吴维江,谷雷雷,王盛年等.工业固废基地聚物固化河道疏浚土力学特性试验研究[J].防灾减灾工程学报,2025,45(03):643-651.

WU Weijiang,GU Leilei,WANG Shengnian,et al.Mechanical Properties of River Dredged Soils Stabilized with Industrial Solid Waste‑based Geopolymer Binder[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(03):643-651.
吴维江,谷雷雷,王盛年等.工业固废基地聚物固化河道疏浚土力学特性试验研究[J].防灾减灾工程学报,2025,45(03):643-651. DOI： 10.13409/j.cnki.jdpme.20240206002.

WU Weijiang,GU Leilei,WANG Shengnian,et al.Mechanical Properties of River Dredged Soils Stabilized with Industrial Solid Waste‑based Geopolymer Binder[J].Journal of Disaster Prevention and Mitigation Engineering,2025,45(03):643-651. DOI： 10.13409/j.cnki.jdpme.20240206002.

摘要

河道疏浚土具有含水率高、强度低、组成成分复杂等特点，难以直接再用于工程建设。为实现高含水河道疏浚土工程再利用，以钢渣粉和高炉矿渣粉为前驱体，生石灰和硅酸钠为碱激发剂，制备工业固废基地聚物凝胶材料，通过系列力学性能试验，研究了地聚物中各组分的最佳配比关系，探讨了初始含水率、养护龄期对地聚物固化河道疏浚土强度的影响规律，对比评价了地聚物固化疏浚土的力学性能，并通过微结构观测分析了地聚物固化河道疏浚土的内在机制。结果表明：工业固废基地聚物中生石灰、硅酸钠、钢渣粉、高炉矿渣粉四者的最佳质量掺比为280∶350∶729∶405；地聚物固化疏浚土强度随初始含水率提高呈非线性下降，随养护龄期增加呈非线性增加；地聚物固化疏浚土压拉强度远低于水泥固化疏浚土，但却具有更高的内摩擦角；随养护龄期增加，大量无定形凝胶的生成以及氢氧化钙的消失提高了河道疏浚土整体性，因而改善了河道疏浚土的力学性能。

Abstract

River dredged soils exhibit high moisture content

low strength

and complex composition

making them difficult to reuse directly in engineering construction. To achieve the engineering reuse of high-moisture river dredged soils

an industrial solid waste-based geopolymer binder was prepared using steel slag powder and blast furnace slag powder as precursors

and quicklime and sodium silicate as alkali activators. Through a series of mechanical tests

the optimal mass mixing ratio of each component in the geopolymer was investigated

and the effects of initial water content and curing age on the strength of geopolymer-stabilized river dredged soils were studied. The mechanical properties of geopolymer-stabilized dredged soils were compared and evaluated

and the inherent mechanism of geopolymer-stabilized river dredged soils was analyzed through microstructure observation. The results indicated that the optimal mass ratio of quicklime:sodium silicate:steel slag powder:blast furnace slag powder in the industrial solid waste-based geopolymer was 280∶350∶729∶405. The strength of geopolymer-stabilized dredged soils nonlinearly decreased with higher initial water content and nonlinearly increased with prolonged curing age. The compressive and tensile strength of geopolymer-stabilized dredged soils was significantly lower than that of cement-stabilized dredged soils

whereas their internal friction angle was notably higher. With increasing curing age

the formation of abundant amorphous gels and the consumption of calcium hydroxide enhanced the integrity of dredged soils

leading to improved mechanical properties. This study provides a reference for the resource recycling of high-water-content soft soils.

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references

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