Effects of different catalysts on the structure and properties of polyurethane/water glass grouting materials

Zhang, Qian; Hu, Xiangming; Wu, Mingyue; Zhao, Yanyun; Yu, Chuang

doi:10.1002/app.46460

Cited by 108 publications

(42 citation statements)

References 58 publications

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“…2(f) appears to be more compact than that depicted in Fig. 2(e) [23][24][25][26]. These difference in the microstructures of the cementitious materials clearly resulted in different strengths.…”

Section: Advances In Engineering Research Volume 176mentioning

confidence: 99%

A Study on the Activation of Carbide Slag Cementitious Materials

Wu¹,

Hu²,

Zhang³

et al. 2018

Proceedings of the 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protecti

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This research used orthogonal testing methods to study the effect of stimulator content on the properties of carbide slag (CS) cementitious materials. Range and variance analyses reveal that different stimulators do not significantly affect the consistencies and setting times of these cementitious materials, but influenced considerably their flexural and compressive strengths; the influence decreases in the order: NaOH> CaCl2> Na2SO4> Na2SiO3. Further analyses show that the strengths of these cementitious materials increase with increasing NaOH content, and decrease with increasing CaCl2 content. When the mass ratio of Na2SO4: Na2SiO3: CaCl2: NaOH was 1: 1: 0: 5, the stimulators exhibited the best activating effect. X-ray diffraction (XRD) and Scanning electron microscope (SEM) analyses showed that the 28-day hydration products contain large amounts of ettringite (AFt), calcium silicate hydrate (C-S-H), calcium aluminate hydrate (C-A-H), and small amounts of unreacted Ca(OH)2 and quartz. These hydration products increased the strengths of these cementitious systems.

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Section: Advances In Engineering Research Volume 176mentioning

confidence: 99%

A Study on the Activation of Carbide Slag Cementitious Materials

Wu¹,

Hu²,

Zhang³

et al. 2018

Proceedings of the 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protecti

Self Cite

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“…The compressive strength, fracture toughness, fracture energy, flexural strength and bending die of PU/WG grouting material were increased by 11.65–40.65%, 9.68%, 21.33%, 6.60% and 15.85%, respectively, by introducing 2.5 wt.% silane coupling agent 3-chloropropyltrimethoxysilane (CTS) (Figure 25). Zhang et al [114] discussed the effects of dimethylbenzylamine (BDMA) and dibutyltin dilaurate (DBTDL) catalysts on the PU/WG grouting material. DBTDL accelerated the gel and curing reaction of the materials and BDMA increased the fluidity and compressive strength of the PU/WG.…”

Section: Polymer-containing Soft Matters For Coal Mine Disaster/hamentioning

confidence: 99%

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Wang

et al. 2019

Polymers

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Safe mining is the premise and guarantee of sustainable development of coal energy. Due to the combination of excellent properties of polymers and traditional soft matters, polymer-containing soft matters are playing an increasingly important role in mine disaster and hazard control. To summarize the valuable work in recent years and provide reference and inspiration for researchers in this field, this paper reviewed the recent research progress in polymer-containing soft matters with respect to mine dust control, mine fire control, mine gas control and mine roadway support. From the perspective role of polymers in a material system, we classify mine polymer-containing soft matters into two categories. The first is polymer additive materials, in which polymers are used as additives to modify fluid-like soft matters, such as dust-reducing agents (surfactant solution) and dust-suppressing foams. The second is polymer-based materials, in which polymers are used as a main component to form high performance solid-like soft matters, such as fire prevention gels, foam gels, gas hole sealing material and resin anchorage agent. The preparation principle, properties and application of these soft matters are comprehensively reviewed. Furthermore, future research directions are also suggested.

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“…In recent years, various modified polyurethane materials had been developed for different application ways. It was found that the catalyst had a great influence on the polyurethane grouting material by Q. Zhang et al A small amount of catalyst can improve the reaction speed and early strength of the polyurethane grouting material [21]. Adding nano-silica to polyurethane grouting material can improve the toughness of www.videleaf.com materials and enhance the mechanical properties of high temperature and low temperature [22].…”

Section: Introductionmentioning

confidence: 99%

Compression Characteristics and Constitutive Model of Low-Exotherm Modified Polyurethane Grouting Materials

Xu¹,

Wang²,

Zhong³

et al. 2021

Prime Archives in Engineering

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In permafrost regions, ordinary polyurethane grouting materials are not suitable for the repair and reinforcement of road engineering in permafrost regions due to release of a large amount of heat during the reaction high. In this study, the polyurethane grouting material is modified by changing the catalyst, blowing agent and reaction scheme to reduce the heat released during the reaction. The stress-strain curves of lowexotherm polyurethane grouting material specimens possessing various densities are investigated by means of unconfined uniaxial compression experiments, and the stress-strain relationships and failure mode of low-and high-density specimens are analysed. The characteristics of three stages in the compression process of the materials, namely, the elasticity stage, platform stage, and densification stage, are studied. The compressive strength increases with the increase of density, and

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Effects of different catalysts on the structure and properties of polyurethane/water glass grouting materials

Cited by 108 publications

References 58 publications

A Study on the Activation of Carbide Slag Cementitious Materials

A Study on the Activation of Carbide Slag Cementitious Materials

Recent Progress in Polymer-Containing Soft Matters for Safe Mining of Coal

Compression Characteristics and Constitutive Model of Low-Exotherm Modified Polyurethane Grouting Materials

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