Chemically resistant polymeric jointing grout with environmental impact

Drochytka, Rostislav; Hodul, Jakub; Mészárosová, Lenka; Jakubík, Aleš

doi:10.1016/j.conbuildmat.2021.123454

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…Grouting is a method that can be used to fill the cracks with appropriate seriflux to achieve the purpose of reinforcement and antiseepage, and it is widely used in the repair works of microcracks [15,16]. Penetration capability is an important evaluation criterion for the success of grouting; especially for those microcracks with a width less than 0.5 mm [17], the grouting performance of cement-based repair materials and organic-inorganic composite repair materials is very limited due to their particle size [18,19], while the organic repair materials with excellent fluidity are the best repair materials for microcracks [20].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Guo

et al. 2023

Materials

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Methyl methacrylate (MMA) material is considered to be a suitable material for repairing concrete crack, provided that its large volume shrinkage during polymerization is resolved. This study was dedicated to investigating the effect of low shrinkage additives polyvinyl acetate and styrene (PVAc + styrene) on properties of the repair material and further proposes the shrinkage reduction mechanism based on the data of FTIR spectra, DSC testing and SEM micrographs. The results showed that PVAc + styrene delayed the gel point during the polymerization, and the formation of two-phase structure and micropores compensated for the volume shrinkage of the material. When the proportion of PVAc + styrene was 12%, the volume shrinkage could be as low as 4.78%, and the shrinkage stress was reduced by 87.4%. PVAc + styrene improved the bending strength and fracture toughness of most ratios investigated in this study. When 12% PVAc + styrene was added, the 28 d flexural strength and fracture toughness of MMA-based repair material were 28.04 MPa and 92.18%, respectively. After long-term curing, the repair material added with 12% PVAc + styrene showed a good adhesion to the substrate, with a bonding strength greater than 4.1 MPa and the fracture surface appearing at the substrate after the bonding experiment. This work contributes to the obtaining of a MMA-based repair material with low shrinkage, while its viscosity and other properties also can meet the requirements for repairing microcracks.

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Section: Introductionmentioning

confidence: 99%

Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Guo

et al. 2023

Materials

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“…Grouting involves injecting grouts into the voids or joints and cementing the rock masses to increase the stability. Nowadays, Portland cement grouts and chemical grouts are generally used in grouting reinforcement projects (Drochytka et al, 2021; Jin & Sui, 2021; Li et al, 2019; Li, Chen, et al, 2021; Mohan et al, 2021; Sun et al, 2021; El Tani & Stille, 2017; Zhou et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Development and application of novel high‐efficiency composite ultrafine cement grouts for roadway in fractured surrounding rocks

Tian,

Chen,

Han

et al. 2023

Deep Underground Science and Engineering

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The fractured surrounding rocks of roadways pose major challenges to safe mining. Grouting has often been used to reinforce the surrounding rocks to mitigate the safety risks associated with fractured rocks. The aim of this study is to develop highly efficient composite ultrafine cement (CUC) grouts to reinforce the roadway in fractured surrounding rocks. The materials used are ultrafine cement (UC), ultrafine fly ash (UF), ultrafine slag (US), and additives (superplasticizer [SUP], aluminate ultrafine expansion agent [AUA], gypsum, and retarder). The fluidity, bleeding, shrinkage, setting time, chemical composition, microstructure, degree of hydration, and mechanical property of grouting materials were evaluated in this study. Also, a suitable and effective CUC grout mixture was used to reinforce the roadway in the fractured surrounding rock. The results have shown that the addition of UF and US reduces the plastic viscosity of CUC, and the best fluidity can be obtained by adding 40% UF and 10% US. Since UC and UF particles are small, the pozzolanic effect of UF promotes the hydration reaction, which is conductive to the stability of CUC grouts. In addition, fine particles of UC, UF, and US can effectively fill the pores, while the volumetric expansion of AUA and gypsum decreases the pores and thus affects the microstructure of the solidified grout. The compressive test results have shown that the addition of specific amounts of UF and US can ameliorate the mechanical properties of CUC grouts. Finally, the CUC22‐8 grout was used to reinforce the No. 20322 belt roadway. The results of numerical simulation and field monitoring have indicated that grouting can efficaciously reinforce the surrounding rock of the roadway. In this research, high‐performance CUC grouts were developed for surrounding rock reinforcement of underground engineering by utilizing UC and some additives.

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A Microbially Induced Magnesia Carbonation (MIMC) Method with Potential Application for Crack Healing of Sandstone Cultural Relics: Improving Interfacial Bonding Strength

Dong,

Pan,

Tang

et al. 2024

Rock Mech Rock Eng

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Chemically resistant polymeric jointing grout with environmental impact

Cited by 7 publications

References 53 publications

Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Study on the Effect of PVAc and Styrene on the Properties and Microstructure of MMA-Based Repair Material for Concrete

Development and application of novel high‐efficiency composite ultrafine cement grouts for roadway in fractured surrounding rocks

A Microbially Induced Magnesia Carbonation (MIMC) Method with Potential Application for Crack Healing of Sandstone Cultural Relics: Improving Interfacial Bonding Strength

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