Experimental study on interfacial damage mechanisms of polymer-concrete composite structure

Guo, Chengchao; Pei, Lihua; Guan, Huan; Chu, Xuanxuan; Wang, Haibo; Shi, Feifan; An, Zhiyong; Qin, Lei

doi:10.1016/j.jobe.2023.106968

Cited by 6 publications

(4 citation statements)

References 25 publications

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“…Consequently, the filling and lapping between the hydration products were closer, optimizing the interface microstructure. 26,27 (2) A chemical reaction occurred between the active group on the polymer branch and Ca 2+ in the cement paste, forming a new chemical bond. 28 (3) The polymer exhibited water retention, which could effectively decrease the water absorbed by the concrete substrate from the repair mortar.…”

Section: Effects Of the Sae Content On Bond Strengthmentioning

confidence: 99%

“…50 Moreover, the effects of polymer grain refinement enriched the bond interface with numerous small-sized hydration products, which enhanced the interfacial bond strength. 26 and flexural bond strengths of the PAG repair mortar under conditions of a rough surface of the concrete matrix when cured to 28 days.…”

Section: Effects Of the Sae Interfacial Agent On Bond Strengthmentioning

confidence: 99%

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Effects of styrene–acrylic emulsion on bond performance and interface microstructure of repair mortar of ternary cementitious system

Shi,

Bu,

2024

J of Applied Polymer Sci

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This study investigates the effects of styrene–acrylic emulsion (SAE) as a modifier and interfacial agent on the interfacial bond performance of ordinary Portland cement–aluminate cement–gypsum (PAG) repair mortar. The hydration products and interfacial microstructure are analyzed via x‐ray diffraction (XRD), x‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The results demonstrate that the addition of SAE can effectively enhance the tensile bond strength and flexural bond strength of the PAG repair mortar, and the optimal addition amount of SAE is 10 wt%. The tensile and flexural bond strengths of the PAG repair mortar with SAE interfacial agent at 40% concentration are 1.38 and 1.34 times than those of the mortar without the interfacial agent, respectively. XPS and FTIR analyses reveal that the carboxyl groups in SAE and Ca2+ generated from cement hydration form Ca2+–carboxyl complexes. The SEM and XRD analyses indicate that SAE can alter the distribution and size of crystals at the bond interface and considerably reduce the thickness of the bond interface; however, SAE cannot change the type of hydration products at the bond interface.

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Section: Effects Of the Sae Content On Bond Strengthmentioning

confidence: 99%

Section: Effects Of the Sae Interfacial Agent On Bond Strengthmentioning

confidence: 99%

Effects of styrene–acrylic emulsion on bond performance and interface microstructure of repair mortar of ternary cementitious system

Shi,

Bu,

2024

J of Applied Polymer Sci

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“…ROCHA et al [28], assessed the feasibility of using recycled concrete aggregates (ARCO) in reinforced geogrid walls, finding that ARCO exhibits satisfactory physical and mechanical bonding properties in walls up to 5 meters in height. GUO et al [29] discovered through direct shear tests and analysis using acoustic emission and digital image correlation techniques that the interface damage and shear failure of concrete-polymer composite structures repaired with non-water reactive polymers primarily occur at the interface. PEREIRA et al [30] confirmed that buriti leaf fibers exhibit excellent tensile strength when used as reinforcement in the preparation of unidirectional continuous fiber-reinforced polymer composites, especially when combined with an epoxy resin matrix.…”

Section: Introductionmentioning

confidence: 99%

Research on the interface characteristics of coal gangue with different geosynthetic reinforcements

Zhao,

Gao,

Liu

et al. 2024

Matéria (Rio J.)

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Coal gangue occupies substantial land resources. Using coal gangue as reinforcement fill material is an effective utilization method. The characteristics of the soil-reinforcement interface influence the safety and stability. Large-scale direct shear tests were conducted to study the interface characteristics of coal gangue with polypropylene woven geotextile, welded steel-plastic geogrid, and high-density polyethylene uniaxial geogrid. The tests revealed that the shear stress-shear displacement relationship is nonlinear and positively correlated with normal stress, with the breakage of burnt coal gangue particles observed during the process. The maximum shear stress and shear strength index of the interface for the three geosynthetics reinforced coal gangue are in the order of uniaxial high-density polyethylene (HDPE) geogrid showing the highest reinforcement strength, followed by the welded steel-plastic geogrid, with the polypropylene woven geotextile having the lowest strength. After HDPE geogrid reinforcement, interface friction angle slightly changes, but cohesion significantly increases, with an increase of 1156.9%. Considering the interface interactions, among the three geosynthetic materials, HDPE geogrid exhibits the most effective reinforcement effect on coal gangue, followed by the welded steel-plastic geogrid. The geotextile shows the least effectiveness in reinforcing burnt coal gangue. For reinforced coal gangue projects, HDPE geogrid is recommended as the reinforcing material.

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“…5 Eliminating these defects is crucial for enhancing the toughness of C–S–H and cement, and one effective approach is to involve polymers. 6–8 Currently, polymer dispersions are extensively researched and employed in cement-based materials, achieving the goal of toughening through CSH modification. Utilizing poly acrylic acid (PAA) dispersion increased the toughness by 24.73% but reduced the strength by 9.52%.…”

Section: Introductionmentioning

confidence: 99%

A toughening mechanism of the strain rate-optimal chain length on polymer-modified calcium silicate hydrates (CSH)

Zhou,

Xiao,

Cheng

et al. 2023

Phys. Chem. Chem. Phys.

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Experimental study on interfacial damage mechanisms of polymer-concrete composite structure

Cited by 6 publications

References 25 publications

Effects of styrene–acrylic emulsion on bond performance and interface microstructure of repair mortar of ternary cementitious system

Effects of styrene–acrylic emulsion on bond performance and interface microstructure of repair mortar of ternary cementitious system

Research on the interface characteristics of coal gangue with different geosynthetic reinforcements

A toughening mechanism of the strain rate-optimal chain length on polymer-modified calcium silicate hydrates (CSH)

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