Preparation of epoxy resin-geopolymer (ERG) for repairing and the microstructures of the new-to-old interface

Xiong, Guiyan; Guo, Xiaolu; Zhang, Hongmei

doi:10.1016/j.compositesb.2023.110731

Cited by 22 publications

(1 citation statement)

References 51 publications

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“…Fly ash (FA) and slag powder (Slag) were all purchased from the Hengnuo Filter Material Co., Ltd. in Zhengzhou, China. Detailed information about FA and Slag can be found in the previous study [15,16]. Alkali activator used in this paper was adjusted by water glass and NaOH.…”

Section: Raw Materialsmentioning

confidence: 99%

The early bonding performance of geopolymer for repair: Effect of mix proportion of cement substrate

Xiong,

Guo,

Cundy

2023

ce papers

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Geopolymer can be potential Portland cement alternatives or supplement for concrete repair. In order to understand the bonding mechanism of geopolymer repairing materials, the effect of the mix proportion of cement mortar substrate on the early bonding performance was studied. For repaired composites by geopolymer, with the increase of sand‐to‐cement ratio of cement substrate from 1.5 to 2.5, the trends in the interfacial flexural‐tensile strength and slant shear strength were the same, both decreasing, which may be explained by the combined effect of surface porosity and the amount of surface cement pastes. And with the rise of the water‐to‐cement ratio of cement substrate from 0.4 to 0.5, the interfacial flexural‐tensile strength also increased mainly because of the increase in the surface porosity of the substrate, while the slant shear strength decreased resulting from the impact of compressive strength of the substrate. This indicates that the interfacial flexural‐tensile test is more suitable for the evaluation of the bonding performance than the slant shear test when the mix proportions of substrate vary.

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Section: Raw Materialsmentioning

confidence: 99%

The early bonding performance of geopolymer for repair: Effect of mix proportion of cement substrate

Xiong,

Guo,

Cundy

2023

ce papers

Self Cite

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Cation Bimetallic MOF Anchored Carbon Fiber for Highly Efficient Microwave Absorption

Zhang,

Li,

Shi

et al. 2024

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Carbon fiber (CF) is a potential microwave absorption (MA) material due to the strong dielectric loss. Nevertheless, owing to the high conductivity, poor impedance matching of carbon‐based materials results in limited MA performance. How to solve this problem and achieve excellent MA performance remains a principal challenge. Herein, taking full advantage of CF and excellent impedance matching of bimetallic metal–organic frameworks (MOF) derivatives layer, an excellent microwave absorber based on micron‐scale 1D CF and NiCoMOF (CF@NiCoMOF‐800) is developed. After adjusting the oxygen vacancies of the bimetallic MOF, the resultant microwave absorber presented excellent MA properties including the minimum reflection loss (RLmin) of −80.63 dB and wide effective absorption bandwidth (EAB) of 8.01 GHz when its mass percent is only 5 wt.% and the thickness is 2.59 mm. Simultaneously, the mechanical properties of the epoxy resin (EP)‐based coating with this microwave absorber are effectively improved. The hardness (H), elastic modulus (E), bending strength, and compressive strength of CF@NiCoMOF‐800/EP coating are 334 MPa, 5.56 GPa, 82.2 MPa, and 135.8 MPa, which is 38%, 15%, 106% and 53% higher than EP coating. This work provides a promising solution for carbon materials achieving excellent MA properties and mechanical properties.

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Cross-interface propagation behavior of tension cracks during Brazilian experiments of coal–concrete bi-materials with different cementation strengths

Li,

Wu,

et al. 2024

Comp. Part. Mech.

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Preparation of epoxy resin-geopolymer (ERG) for repairing and the microstructures of the new-to-old interface

Cited by 22 publications

References 51 publications

The early bonding performance of geopolymer for repair: Effect of mix proportion of cement substrate

The early bonding performance of geopolymer for repair: Effect of mix proportion of cement substrate

Cation Bimetallic MOF Anchored Carbon Fiber for Highly Efficient Microwave Absorption

Cross-interface propagation behavior of tension cracks during Brazilian experiments of coal–concrete bi-materials with different cementation strengths

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