Thermal-mechanical properties of metakaolin-based geopolymer containing silicon carbide microwhiskers

Taborda-Barraza, Madeleing; Pelisser, Fernando; Gleize, Philippe Jean Paul

doi:10.1016/j.cemconcomp.2021.104168

Cited by 19 publications

(4 citation statements)

References 53 publications

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“…The functional groups on the nanomaterials surface can interact with monovalent ions, such as sodium (−1.77 eV) present in A.S [ 67 ]. Long et al [ 68 ] and Taborda-Barraza [ 40 ] also registered an increased on reactions peaks with the nanomaterials incorporation, which suggests that nanomaterials provided nucleation’s sites, and depending on their SSA, can modify the final reaction degree.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, a previous study identified that the incorporation of CNT caused increases of up to 550.0% and 666.0% in the yield stress and viscosity of CNT-cementitious composites compared to the plain matrix [ 57 ]. In geopolymeric systems, Taborda-Barraza et al [ 40 ] reported increases of approximately 40 and 12.2% in the yield stress and viscosity, respectively, with the incorporation of a SCW content of 0.2 wt.%.…”

Section: Resultsmentioning

confidence: 99%

“…A CNT and SCW content of 0.2% related to precursors’ weight was assessed. This content was defined based on research on CNT and SCW incorporation in geopolymer-based matrices [ 33 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of CNTs and SiC Whiskers Effect on the Rheology and Mechanical Performance of Metakaolin-Based Geopolymers

et al. 2022

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Despite geopolymers having emerged as a more sustainable alternative to Portland cement, their rheological properties still need to be thoroughly investigated, aiming at the material’s applicability. Additionally, studies that evaluated the fresh state of geopolymer composites with nanomaterials are scarce. Thus, two metakaolin-based geopolymer systems were reinforced with nanomaterials with a similar geometry: carbon nanotubes (CNT) and silicon carbide whiskers (SCW). The nanomaterials incorporation was assessed by rotational rheometry (conducted up to 110 min), isothermal calorimetry, compressive strength after 7 and 28 days, and the microstructure was investigated using X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). CNT and SCW incorporation (0.20 wt.%) did not significantly affect the yield stress and viscosity of the R2-group (based on metakaolin type 2), while increasing the rheological parameters up to 56.0% for the R1-group (based on metakaolin type 1). Both additions modified the reaction kinetics. Increments of up to 40.7% were observed in the compressive strength of geopolymer pastes with the incorporation of a SCW content of 0.2 wt.%. XRD and FTIR results suggest similar structural modifications between precursors. Nevertheless, R2 showed substantial transformations while the R1 group exhibited anhydrous material that can react over time. Overall, incorporating CNT and SCW contributed to higher mechanical increments on systems with average mechanical strength (R1) compared to systems with higher potential mechanical performance (R2).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Evaluation of CNTs and SiC Whiskers Effect on the Rheology and Mechanical Performance of Metakaolin-Based Geopolymers

et al. 2022

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“…Barraza et al found higher mechanical properties when SiC micro flakes were used in geopolymer concrete [ 43 ]. Improved mechanical properties were obtained because of micro flakes rather than geopolymer interphase.…”

Section: Resultsmentioning

confidence: 99%

Effect of Silicon Carbide and Tungsten Carbide on Concrete Composite

et al. 2022

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Flexural strength of concrete is an important property, especially for pavements. Concrete with higher flexural strength has fewer cracking and durability issues. Researchers use different materials, including fibers, polymers, and admixtures, to increase the flexural strength of concrete. silicon carbide and tungsten carbide are some of the hardest materials on earth. In this research, the mechanical properties of carbide concrete composites were investigated. The silicon carbide and tungsten carbide at different percentages (1%, 2%, 3%, and 4%) by weight of cement along with hybrid silicon carbide and tungsten carbide (2% and 4%) were used to produce eleven mixes of concrete composites. The mechanical tests, including a compressive strength test and flexural strength test, along with the rapid chloride permeability test (RCPT), were conducted. It was concluded that mechanical properties were enhanced by increasing the percentages of both individual and hybrid carbides. The compressive strength was increased by 17% using 4% tungsten carbide, while flexural strength was increased by 39% at 4% tungsten carbide. The significant effect of carbides on flexural strength was also corroborated by ANOVA analysis. The improvement in flexural strength makes both carbides desirable for use in concrete pavement. Additionally, the permeability, the leading cause of durability issues, was reduced considerably by using tungsten carbide. It was concluded that both carbides provide promising results by enhancing the mechanical properties of concrete and are compatible with concrete to produce composites.

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Thermal, mechanical, and microstructural properties of inorganic polymer composites from quarry wastes (feldspathic minerals)

Nana,

Ridolfi,

Anensong

et al. 2023

J Therm Anal Calorim

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Thermal-mechanical properties of metakaolin-based geopolymer containing silicon carbide microwhiskers

Cited by 19 publications

References 53 publications

Evaluation of CNTs and SiC Whiskers Effect on the Rheology and Mechanical Performance of Metakaolin-Based Geopolymers

Evaluation of CNTs and SiC Whiskers Effect on the Rheology and Mechanical Performance of Metakaolin-Based Geopolymers

Effect of Silicon Carbide and Tungsten Carbide on Concrete Composite

Thermal, mechanical, and microstructural properties of inorganic polymer composites from quarry wastes (feldspathic minerals)

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