Enhanced toughness of ultra-fine sulphoaluminate cement-based hybrid grouting materials by incorporating in-situ polymerization of acrylamide

Zhang, Haibo; Zhou, Rong; Liu, Songhui; Zhu, Yu; Shang, Wei; Wang, Jiru

doi:10.1016/j.conbuildmat.2021.123421

Cited by 32 publications

(5 citation statements)

References 35 publications

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“…In addition, a stress-based quadratic criterion (Equation 12) and Benzeggagh-Kenane evolution criterion were selected as the initial criterion and damage evolution criterion, respectively. 37 The critical fracture energy G C in mixed mode is shown in Equations ( 13) and (14). The fracture properties are given in Table 4.…”

Section: Improved Progressive Damage Modelmentioning

confidence: 99%

“…[11][12][13] However, the capital investment and ongoing maintenance expenses connected with the molding process are significant. There are two further approaches of toughening: material hybrid [14][15][16] and structural optimization. [17][18][19][20] The introduction of a low-modulus fiber into a fiber hybrid improved the ductility of FRP composites.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of pseudo‐ductility and structural optimization of nacre‐inspired carbon fiber‐reinforced polymer laminate

Xiao,

Li,

Han

et al. 2023

Polymer Composites

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To enhance the ductility of carbon fiber‐reinforced polymer (CFRP) composites, a variety of nacre‐inspired structures with discontinuities were constructed based on the ratio of overlapping length to CFRP laminate thickness. The damage mechanisms and tensile characteristics of discontinuous laminates were elucidated using finite element analysis and experimental investigation. To anticipate the mechanical behavior of the CFRP laminate, an improved Chang‐Chang failure criteria was devised. Moreover, a model adopts the Benzeggagh‐Kenane criterion on cohesive surfaces for delamination initiation and propagation. The predicted stress–strain values are validated using experimental data under tensile stress. Furthermore, a mathematical model accurately predicted the relationship between the tensile performance of nacre‐inspired laminate and overlapping length. According to the findings, the longer the overlapping length (more than 19.5 mm) is, the lower the pseudo‐ductility. Meanwhile, the shorter the overlapping length (less than 17.5 mm) is, the lower the tensile strength. Furthermore, the laminate exhibits some pseudo‐ductility as well as little decrease in tensile strength when the overlapping length is approximately 18.5 mm.Highlights A mathematical model for predicting the tensile properties of various nacre‐inspired laminates was established. The relationship between the discontinuous structure and the pseudo‐ductility of the nacre‐inspired laminate was revealed. Compared with other similar structural laminates, the laminate with an overlapping length of 17.5 mm has better overall performance. Proposed an improved Chang‐Chang progressive failure criterion that was utilized to simulate and analyze the mechanical response and damage of the nacre‐inspired laminates under tension.

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Section: Improved Progressive Damage Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of pseudo‐ductility and structural optimization of nacre‐inspired carbon fiber‐reinforced polymer laminate

Xiao,

Li,

Han

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

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“…However, the pores in triboelectric materials may lead to low compressive resistance and strength, alongside poor bearing capacity. − Moreover, the triboelectric properties of the raw materials for preparing porous TENGs are usually not high enough. ,− Blending modification is the common method to balance the properties. − For example, adding Au nanoparticles as an effective electrolyte in porous polydimethylsiloxane (PDMS) can greatly improve the output power of the material by more than 5 times . Adding BaTiO 3 nanoparticles into PDMS resulted in flexible composites for enhancing the electrical output performance of nanogenerators, which can power wearable/portable electronic devices …”

Section: Introductionmentioning

confidence: 99%

Enhancing Output Signals of Sport Monitors Based on Triboelectric Porous PVDF Nanogenerators via Concaving Cells and Cell-Packing Structures

Ye,

Li,

et al. 2023

ACS Appl. Bio Mater.

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Porous triboelectric polymer materials are widely used in portable sensors due to their lightweight and suitable mechanical performance, but their triboelectric properties need to be improved. Here, we propose a two-step strategy to concave the cell and cell-packing structure of triboelectric materials based on porous poly(vinylidene fluoride) (PVDF). The first step is to prepare triboelectric nanogenerators (TENGs) of PVDF with a concave cell-packing structure via oriented phase inversion. The second step is to concave the cells by radial and axial compression. The results reveal that the concavities in the cell structure at the radial direction and in the cell-packing structure at the axial direction improve the output signals of the porous PVDF TENG by ca. 150 and 110%, respectively. By contrast, the concaving in cell structure at the radial direction exerts a positive effect on triboelectric performance only when the radial compression strain is not bigger than 17.5%, especially when the cell wall is thin (ca. 0.85 μm). Meanwhile, the concavity-based strategy eliminates the irreversible deformation behavior of the porous PVDF material, enhancing its elasticity. The stability test shows that the sensor based on those materials is stable under 12,500 cycles, and the variance in the square derivation of output voltage is less than 1% during the cycle friction. Such stable and triboelectric-improved materials are assembled into sports-monitoring devices, providing an idea for the application of TENG in smart sensing.

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“…A widely used and time-proven technique to prevent such mine accidents is to reinforce broken coal and rock by grouting, which can effectively connect and support weak structures. Currently, available grouting materials are generally classified as inorganic materials (cement [ 1 ], water glass [ 2 ], and clay [ 3 ]), organic materials (polyurethane (PU) [ 4 ], epoxy resin [ 5 ], and acrylamide [ 6 ]), and their composites [ 1 , 2 , 3 ]. Traditional inorganic materials are easy to dilute and hard to coagulate under the influence of water inrush, while the high reactive exotherm, flammability, and high cost of organic materials violate the original purpose of disaster management.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Fly Ash on the Foaming Behavior and Flame Retardancy of Polyurethane Grouting Materials

et al. 2022

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Polyurethane (PU) grouting material has been widely utilized to control water inrush in mining fields. However, the application has been limited by its high cost and poor flame retardancy. Here, we use the fly ash (FA), a waste from coal of the iron-making industry and power plants, as a partial replacement of conventional filler in PU grouting materials to reduce the production cost and the environmental pollution of FA. The surface-modified FA-filled PU (PU/FA) composites were prepared by room-temperature curing. The effects of FA contents (φ) on the structure, foaming behavior, thermal stability, mechanical properties, hydrophobic properties, and flammability of PU grouting materials were examined. Results showed that the higher the φ, the more porous the PU/FA composites are, resulting in a lower density and lower mechanical properties. The relationship between the compression modulus E and the density ρ of the PU/FA composites was E ∝ ρ1.3. In addition, the surface-modified FA improved the compatibility between the hard and soft segment of PU in the PU/FA composite, giving the composites enhanced thermal stability, high hydrophobicity, and flammability resistance.

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Enhanced toughness of ultra-fine sulphoaluminate cement-based hybrid grouting materials by incorporating in-situ polymerization of acrylamide

Cited by 32 publications

References 35 publications

Prediction of pseudo‐ductility and structural optimization of nacre‐inspired carbon fiber‐reinforced polymer laminate

Prediction of pseudo‐ductility and structural optimization of nacre‐inspired carbon fiber‐reinforced polymer laminate

Enhancing Output Signals of Sport Monitors Based on Triboelectric Porous PVDF Nanogenerators via Concaving Cells and Cell-Packing Structures

The Influence of Fly Ash on the Foaming Behavior and Flame Retardancy of Polyurethane Grouting Materials

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