Mechanical properties of geopolymer slurry-cemented crushed stones by self-gravity infiltration

doi:10.3785/j.issn.1008-973X.2025.12.017

Journal of ZheJiang University (Engineering Science)

2025, Vol. 59

Issue (12): 2627-2634 DOI: 10.3785/j.issn.1008-973X.2025.12.017

Mechanical properties of geopolymer slurry-cemented crushed stones by self-gravity infiltration

Zuqiang YANG(

),Zhen GUO*(

),Hengyu LIU,Changrui DONG,Beifeng LV

College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

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Abstract

The rapid repair of disaster-damaged highways is crucial for post-disaster rescue operations. To address this need, a novel rapid repair method using geopolymer slurry to infiltrate and cement crushed stone under self-gravity was introduced. Laboratory tests were used to investigate this process, measuring the specimens’ cementation rate and uniaxial compressive strength. On this basis, the influence of crushed stone particle size, void ratio, and the rheological properties of the cemented matrix on the cementation rate was analyzed, and the development characteristics of the mechanical properties of the specimens were discussed. A dimensionless constant was introduced to characterize the permeability of the specimens, and a predictive formula for the cementation rate that comprehensively considered the above influencing factors was further proposed. The research results indicated that the cementation rate of the specimens was significantly affected by the crushed stone particle size, void ratio, and rheological properties of the cemented matrix. Uniaxial compressive strength was increased with the increase of the cementation rates, reaching up to 6.72 MPa at 3 hours and 12.44 MPa at 6 hours. Failure modes transitioned from shear to splitting, with cemented matrix distribution types being contact cementation, non-contact cementation, and clogging.

Key words： cemented granular material rapid reinforcement geopolymer cementation rate mechanical properties failure mode

Received: 08 December 2024 Published: 25 November 2025

CLC:

TU 472.4

Fund: 国家自然科学基金资助项目（52401344）；博士后基金资助项目（GZC20241516）.

Corresponding Authors: Zhen GUO E-mail: 22212021@zju.edu.cn;nehzoug@163.com

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Cite this article:

Zuqiang YANG,Zhen GUO,Hengyu LIU,Changrui DONG,Beifeng LV. Mechanical properties of geopolymer slurry-cemented crushed stones by self-gravity infiltration. Journal of ZheJiang University (Engineering Science), 2025, 59(12): 2627-2634.

URL:

https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2025.12.017 OR https://www.zjujournals.com/eng/Y2025/V59/I12/2627

地聚物浆体自重入渗胶结碎石的力学性能

公路受灾损毁后的快速抢通是保障灾后救援顺利进行的关键环节，针对这一需求，本研究提出地聚物浆体自重入渗胶结碎石的新型快速修复方式，通过开展室内试验研究地聚物浆体在自重作用下入渗胶结碎石的过程，并对试样的胶结率、单轴抗压强度进行测试. 在此基础上，分析碎石粒径、孔隙比以及胶结基质流变特性对胶结率的影响规律，并探讨试样的力学性能发展特征. 引入无量纲常数对试样的可渗度进行表征并进一步提出综合考虑上述影响因素的胶结率预测公式. 研究结果表明：试样的胶结率受碎石粒径、孔隙比和胶结基质流变特性影响显著；随着胶结率的提高，试样单轴抗压强度随之提高，试样3 h抗压强度最高达到6.72 MPa，6 h抗压强度最高达到12.44 MPa；试样破坏模式由剪切破坏逐渐转变为劈裂破坏，胶结基质在碎石空隙中的分布类型主要包括接触胶结、非接触胶结和堵塞.

关键词： 胶结颗粒材料, 快速加固, 地聚物, 胶结率, 力学特性, 破坏模式

Fig.1 Three groups of gravel with different particle sizes used in test

Fig.2 Geopolymer precursor

Tab.1 Chemical composition of precursor

Fig.3 Particle size distribution of granulated blast furnace slag, fly ash and silica fume

Tab.2 Water glass parameters

Fig.4 Mechanical properties of cemented matrix

Tab.3 Performance of geopolymer-cemented matrix

Fig.5 Test mould for cemented crushed stones

Fig.6 Test process of geopolymer self-gravity infiltration

Tab.4 Test scheme of geopolymer-cemented crushed stones by self-gravity infiltration

Tab.5 Cementation rate of geopolymer-cemented crushed stone samples

Fig.7 Relationship between cementation rate and permeability of geopolymer-cemented crushed stone samples

Fig.8 Distribution morphology of geopolymer-cemented matrix in cemented crushed stone samples with different cementation rates

Fig.9 Stress-strain curves and failure patterns of geopolymer-cemented crushed stone samples

Fig.10 Compressive strength of geopolymer-cemented crushed stone samples

Fig.11 Relationship between compressive strength of geopolymer-cemented crushed stone samples and cementation rate


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