Effect of organosilicon modified epoxy resin on slurry viscosity and mechanical properties of polyurethane grouting materials

Wang, Junjie; Fan, Kui; Du, Junbao; Xu, Jianjun; Dong, Xiaoyu; Li, Xueliang; Ding, Yunsheng

doi:10.1016/j.conbuildmat.2023.131585

Cited by 8 publications

(1 citation statement)

References 43 publications

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“…Organic materials typically have higher injectability, shorter and more controllable setting times, and higher early strength, but they are expensive. Polyurethane slurries [35,36] and acrylic slurries [37,38] have found extensive application in practical engineering.…”

Section: Organic Grouting Materialsmentioning

confidence: 99%

A State-of-the-Art Review on the Study of the Diffusion Mechanism of Fissure Grouting

Du,

Li,

Fang

et al. 2024

Applied Sciences

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China is renowned for its extensive underground engineering projects and the complex geological and hydrological conditions it faces. Grouting treatment technology is widely employed in deep-buried mines and tunnels, where grouting parameters such as materials, pressure, volume, and hole arrangement significantly impact the effectiveness of grouting. This review paper comprehensively examines current research on grouting materials, theories, experiments, and numerical simulations. It summarizes the various factors that must be considered during the grouting process of fissures and explores the diffusion mechanisms of grout under their influence. Furthermore, further research is needed on the mechanisms and treatment methods for poor grouting in rock masses, the distribution patterns of fissures, optimization methods for grouting parameters, and grout quality assessment techniques. Future research should focus on developing more efficient experimental methods with higher accuracy levels while advancing grouting technologies. Establishing comprehensive and accurate rock mass models along with improving monitoring capabilities are also crucial aspects to consider. Therefore, studying the diffusion mechanisms of grout in fissured rock masses is of significant importance for the practical operation of underground engineering projects.

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Section: Organic Grouting Materialsmentioning

confidence: 99%

A State-of-the-Art Review on the Study of the Diffusion Mechanism of Fissure Grouting

Du,

Li,

Fang

et al. 2024

Applied Sciences

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Study on mechanical properties of a roadbed rehabilitation polyurethane grouting material after freeze–thaw cycles

Wang,

Du,

Fang

et al. 2024

Polymer Engineering & Sci

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The mechanical properties of roadbed rehabilitation polyurethane grouting material (RhPU) under freeze–thaw cycles are the theoretical basis for evaluating its long‐term performance in cold regions, but are currently not well understood. Freeze–thaw cycle tests were conducted on RhPU grouting materials of different densities using a rapid freezing method to investigate the effects of damage characteristics of RhPU. The experimental results indicate that the frost damage of RhPU is a fatigue failure process from the outside to the inside. During the freeze–thaw cycle, water‐filled cells experience compression damage due to freezing expansion and interconnected, forming more water seepage channels, accelerating the internal damage of RhPU. Therefore, the dynamic elastic modulus, longitudinal wave velocity, rigidity, and compressive strength of RhPU all decrease with an increase in freeze–thaw cycles. Moreover, at the same freeze–thaw cycles, the lower the density of RhPU, the greater the loss rate of the dynamic elastic modulus, longitudinal wave velocity, rigidity, and compressive strength. The square of the longitudinal wave velocity of RhPU samples before and after freeze–thaw cycles correlates well with density, and the longitudinal wave velocity loss rate better quantifies the internal damage of RhPU samples. Through scanning electron microscopy, the microstructure of RhPU after freeze–thaw cycles was observed, revealing that the lower density of RhPU exhibits more severe freeze–thaw damage compared to higher density RhPU, attributed to its larger cell diameter and greater contact area between adjacent cells. This indicates poorer freeze resistance performance for low‐density RhPU.Highlights The variations of surface damage of RhPU after freeze–thaw cycles were studied. The correlation between and density of RhPU after freeze–thaw cycles was found. The effect of freeze–thaw cycles on mechanical properties of RhPU was analyzed. The microscale freeze–thaw damage mechanism of RhPU was revealed.

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A robust bio-based polyurethane employed as surgical suture with help to promote skin wound healing

Wang,

Liu,

Qiu

et al. 2025

Biomaterials Advances

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Effect of organosilicon modified epoxy resin on slurry viscosity and mechanical properties of polyurethane grouting materials

Cited by 8 publications

References 43 publications

A State-of-the-Art Review on the Study of the Diffusion Mechanism of Fissure Grouting

A State-of-the-Art Review on the Study of the Diffusion Mechanism of Fissure Grouting

Study on mechanical properties of a roadbed rehabilitation polyurethane grouting material after freeze–thaw cycles

A robust bio-based polyurethane employed as surgical suture with help to promote skin wound healing

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