东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (12): 104-115.DOI: 10.12068/j.issn.1005-3026.2025.20240114

• 资源与土木工程 • 上一篇    

不同水灰比水泥基浆液流变特性与扩散机理

李连崇, 王旖藤, 牟文强, 刘洪磊   

  1. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2024-05-15 出版日期:2025-12-15 发布日期:2026-02-09
  • 通讯作者: 牟文强
  • 作者简介:李连崇(1978—),男,辽宁朝阳人,东北大学教授,博士生导师
    刘洪磊(1981—),男,山东枣庄人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52204089);国家自然科学基金资助项目(52374082);国家自然科学基金资助项目(52174070);中国博士后科学基金资助项目(2022M720680);辽宁省自然科学基金资助项目(2024BSBA21)

Rheological Properties and Diffusion Mechanism of Cement-Based Slurries with Different Water-Cement Ratios

Lian-chong LI, Yi-teng WANG, Wen-qiang MU, Hong-lei LIU   

  1. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China.
  • Received:2024-05-15 Online:2025-12-15 Published:2026-02-09
  • Contact: Wen-qiang MU

摘要:

为了研究岩土与采矿工程中注浆材料的扩散机理,分析了5种水灰比条件下3种水泥基浆液的流变性能.基于浆液黏度时变特性和裂隙岩体特性,建立注浆浆液扩散的理论计算模型,阐明不同水泥基浆液的扩散机理.结果表明:纳米硅溶胶复合体系浆液的密度较小(1.25~1.35 g/cm3),流动度较高(260~425 mm);矿渣-粉煤灰和氧化石墨烯复合体系的析水率较低(< 30%),稳定性较好;浆液黏度具有时变特性,拟合函数为η(t)=η0+kaekbt,且随着水灰比增大,浆液的黏度时变特性减弱;通过计算程序获得了3种浆液的扩散半径,揭示了浆液的注浆压力、种类及水灰比的共同影响;在相同扩散距离下注浆压力与黏度时变特性呈正相关;氧化石墨烯复合体系在给定距离下所需注浆压力最小,更易于扩散.

关键词: 裂隙岩体, 注浆浆液, 水灰比, 流变特性, 扩散半径

Abstract:

In order to study the diffusion mechanism of grouting materials in geotechnical and mining engineering, the rheological properties of three types of cement-based slurries under five water-cement ratios were analyzed. Based on the time-dependent viscosity of the slurry and the characteristics of fractured rock masses, a theoretical calculation model for grouting slurry diffusion was established to elucidate the diffusion mechanisms of different cement-based slurries. The results indicate that the slurry of the nano-silica sol composite system has a relatively low density(1.25~1.35 g/cm3)and high fluidity (260~425 mm). The slag-fly ash and graphene oxide composite systems exhibit low bleeding rates(< 30%)and good stability. The viscosity of the slurry demonstrates time-dependent characteristics, with a fitting function(η(t)=η0+kaekbt). Time-dependent characteristics weakens as the water-cement ratio increases. The diffusion radii of the three slurries are obtained through computational procedures, revealing that grouting pressure, slurry type, and water-cement ratio collectively influence the diffusion. Under the same diffusion distance, grouting pressure is positively correlated with the time-dependent viscosity characteristics. The graphene oxide composite system requires the least grouting pressure at a given distance, making it easier to diffuse.

Key words: fractured rock mass, grouting slurry, water-cement ratio, rheological property, diffusion radius

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