Acrylamide in-situ polymerization of toughened sulphoaluminate cement-based grouting materials

Wang, Jiru; Zhang, Haibo; Zhu, Yu; Yan, Zhaoxia; Chai, Hwa Kian

doi:10.1016/j.conbuildmat.2021.126105

Cited by 33 publications

(3 citation statements)

References 14 publications

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“…This nanocomposite hydrogel exhibits excellent shape memory performance and outstanding mechanical strength. Wang et al 35 added acrylamide (AM) for polymerization in cement-based grouting materials. A composite material with high toughness and a three-dimensional interwoven network structure was prepared.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of influence of amide polymer on loess for subgrade

Yue,

Zhang,

Zhang

et al. 2024

Sci Rep

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The effects of moisture and drying shrinkage can lead to uneven settlement, cracking, and other diseases in loess subgrade. The objective of this study was to investigate the effects of amide polymer (AP) on the permeability, mechanical properties and crack resistance of loess by orthogonal experiments. The basic properties of AP and the permeability, mechanical properties, and dry–wet variation properties of polymer-modified loess were tested, and a scale model verification and simulation analysis were conducted. In this paper, water migration in subgrade is regulated by improving the water sensitivity of loess. By reducing the variation range of subgrade water content, the stress accumulation in subgrade caused by water is weakened. The results show that the curing time and mechanical properties of AP are directly affected by the oxidant and reducing agent, and the mechanical properties of AP are compatible with the characteristics of loess. AP filled the grain gap and reduced the permeability of loess by 34.05–280.83%. The ductility of polymer-modified loess is significantly increased, and the strain of peak strength is increased by 17.21–126.36%. AP can regulate moisture change, reduce the surface tension between particles, and reduce stress concentration. The strength loss rate was reduced by 19.98–51.21% by enhancing the cracking resistance and weakening the strength loss caused by dry and wet cycling. The increase of upper layer moisture content in the scale model of polymer-modified loess subgrade is reduced by 31.38–36.11%.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of influence of amide polymer on loess for subgrade

Yue,

Zhang,

Zhang

et al. 2024

Sci Rep

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“…Due to the outstanding compatibility with the hydrates of cement, organic polymers of various chemical origins and bases have been utilized to improve the flexural performance, toughness and flexibility of cementitious systems [13]. Synthetic polymers such as SBR latex, epoxy, ethylene, acetates, acrylamides, and cellulose ethers are frequently used in cementitious composites [14][15][16][17]. Bio-polymers such as Xanthium Gum , Guar Gum , and sodium alginate powders have also been successfully used to improve the durability and flexural performance of cementitious composites [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effect of adsorption interactions of Arabic gum with cement

Neme

2024

Mater. Res. Express

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This study seeks to investigate the influence of cement and Arabic gum on the physico-mechanical and microstructural properties of cementitious composites. The influence of varying quantities of Arabic gum on the hydration, fluidity, mechanical performance and microstructure of cement paste was investigated. The influence of Arabic gum on slant shear performance and capillary water absorption was also investigated. The results indicate that the workability of cement was diminished as a result of the ability of Arabic gum to make the cement paste cohesive. It is evident that when the gum Arabic concentration increases from 147 to 174 mm, the resultant slump value for various w/b ratios drops. The adsorption characteristics showed that for a 15 mg/g dosage at 60, 45, 30, and 15 minutes, respectively, 1.43, 1.32, 1.25, and 1.03 mg/g are achieved. For 1% gum Arabic substitution, the highest flexural strength percentage growth is achieved at 38.46%, 23.74%, and 17.29% at 7, 14, and 28 days, respectively. In addition, the inclusion of Arabic gum improved the slant shear strength of cement composite, making it ideal for use as a building repair material with significant application potential. Experiments on the bonding behavior of the produced cementitious composite with the old mortar reveal that the shear bond strength was greatly increased, demonstrating the compatibility between the old and new cement composites. The microstructure and the porosity of the cement matrix also showed denser and compact matrix making them durable to attain better service life.

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“…Several studies have shown that flexural strength and deformability can be greatly enhanced, while the compressive strength either remains relatively unchanged or experiences slight enhancement (Xu et al 2022, Liang et al 2022. A double network structure consisting of both flexible polymer and rigid hydrates was created by in-situ polymerizaiton to enhance deformability and maintain integrity without breakage (Wang et al 2022). Investigations of molecular dynamics and chemical analyses have shown that Ca ions released from hydration products form chemical bonds with functional groups of organics (e.g.…”

Section: Introductionmentioning

confidence: 99%

Fracture Process of In-situ Polymerization Modified Cementitious Materials

Chengji,

Qiang

2023

16th International Conference on Durability of Building Materials and Components

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By regulating cement hydration reaction and organic monomer polymerization, the strength and deformability of in-situ polymerization modified cement-based materials are greatly improved. However, the fracture processes of this type of organic-inorganic composites have not been systematically investigated. In this work, sodium acrylate (SA) monomer in-situ polymerization modified cementitious composites (iPSA) were fabricated. Three-point bending (TPB) test was conducted with digital image correlation (DIC) technique for characterizing the fracture process zone (FPZ). Microscopic test was conducted to unravel the crosslinked organic-inorganic composite structures in the iPSA matrix. Results showed that an obvious strain concentration region occurred and grew at the notch tip of the iPSA beams with load. The gradually expanding width of FPZ was normally distributed. Microscopic test suggested that the physical interlinks between the cement hydrates and sodium polyacrylate may resist again the FPZ development of iPSA. The findings of this work would deepen the understandings of fracture process of polymer modified cementitious composites with broad engineering applications.

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Acrylamide in-situ polymerization of toughened sulphoaluminate cement-based grouting materials

Cited by 33 publications

References 14 publications

Experimental investigation of influence of amide polymer on loess for subgrade

Experimental investigation of influence of amide polymer on loess for subgrade

Effect of adsorption interactions of Arabic gum with cement

Fracture Process of In-situ Polymerization Modified Cementitious Materials

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