Influence of basic environment of geopolymer composites on degradation rates of E and AR type glass fibers

Ryvolová, Martina; Svobodová, Lucie; Bakalová, Totka; Voleský, Lukáš

doi:10.21062/mft.2021.030

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…The most crucial parameter was the diameter of an elementary fiber (one fibril within a fiber roving). The above image analysis method has also been described in our previous studies [ 26 , 27 ].…”

Section: Methodsmentioning

confidence: 99%

Validation of an Image Analysis Method for Evaluating the Chemical Resistance of Glass Fibers to Alkaline Environments

Ryvolová¹,

Svobodová²,

Bakalová³

2021

Materials

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This article is focused on the comparison of the reliability of the results obtained by image analysis (newly proposed evaluation method) with well-known methods of evaluation of long-term corrosion resistance of glass fibers in an alkaline environment (pH > 12). The developed method is based on the analysis of scanning electron microscopy images (diameter and structures on the fiber surface). An experiment (52 weeks) was performed to evaluate two types of glass fibers: anticorrosive glass fibers (ARGFs) and E-glass fibers (EGFs). Three media were used to treat the fibers (23 ± 2 °C): H2O, Ca(OH)2, and K2SiO3. The ARGFs’ tensile strength did not reduce; a decrease by 68% was observed for EGFs in H2O. Tensile strength decreased by 32% and 85–95% in K2SiO3; by 50% and 64% in Ca(OH)2 for the ARGF and EGF, respectively. Statistical analysis was performed to validate the reliability and plausibility of the developed method. ARGFs and EGFs did not show any relationship between the fiber diameter and weight in H2O; however, the linear trends may predict this relationship in Ca(OH)2 and K2SiO3. For the ARGF and EGF, the cubic trend was suitable for predicting the change in fiber weight and diameter over time in Ca(OH)2 and K2SiO3.

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Section: Methodsmentioning

confidence: 99%

Validation of an Image Analysis Method for Evaluating the Chemical Resistance of Glass Fibers to Alkaline Environments

Ryvolová¹,

Svobodová²,

Bakalová³

2021

Materials

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“…Effect of steel [143], glass [148], polyvinyl alcohol [149], basalt [143], and cotton stalk [150] fibers on the sulfate corrosion resistance of geopolymer mortars.…”

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confidence: 99%

Scientometric Analysis of Global Research on the Utilization of Geopolymer Composites in Construction Applications

et al. 2023

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This study conducts a scientometric review on the use of geopolymer mortar and composites in different construction applications. It aims to analyze the findings of past research and reveal the research constituents, development trends, and knowledge gaps. The Scopus database was employed to retrieve the relevant publications, while Bibliometrix was used to conduct the statistical analyses. Results revealed a steady and gradual increase in the number of publications after 2013, as the annual growth rate increased from 23.9% to 45.2% between the timeframes 2003–2013 and 2014–2022, respectively. The analysis highlighted that many authors collaborated on different construction applications of geopolymers regardless of geographic location. Meanwhile, Construction and Building Materials, China, and Universiti Malaysia Perlis were found to be the predominant journal, country, and institution, respectively. The scientometric analysis showed that the most frequently investigated applications for geopolymer mortars and composites were fire resistance, corrosion protection, and repair. Research gaps highlighted that other applications are not as well investigated despite the promising performance of the geopolymer composites, including 3D printing, heavy metals absorption, environmental protection, and underwater applications. Future research is required to assess the use of other alumina and silica-rich binders in geopolymers while also exploring their lifecycle assessment and economic impact.

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Methodology of Analysis of Fibre Sedimentation in HPC mixtures

Jiroutová,

Bittner,

Hurtig

et al. 2023

Manufacturing Technology

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The aim of this work is to propose a methodology for evaluating inhomogeneity due to the sedimentation of fibres in High-Performnce Concrete (HPC) mixtures. HPC mixtures makes better mechanicalphysical properties than ordinary concrete. To achieve higher strengths, the fine-grained matrix is reinforced with the reinforcement -fibres. The type of used fibres and their homogenization in mixture has an influence on the final mechanical properties of HPC mixture. Four concrete mixtures with same component proportion was chosen for experiments. Water was the only one component, that was changing in mixture recipes. Steel fibres with a ratio of the diameter to length = 0.3/20 were used as reinforcement. The fibre volume in mixture was 1.5 %. The microscopy analysis was used for evaluation of the fibre distribution in the test specimens. It was obtained, that the concentration of the fibres increases with distance from the surface to the bottom of the HPC structure and this non-homogeneity increases with higher water dosage. The dependence of sedimentation of fibres on composition of HPC mixtures can be used for evaluation and optimization of final mechanical properties of the HPC structures.

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Influence of basic environment of geopolymer composites on degradation rates of E and AR type glass fibers

Cited by 3 publications

References 11 publications

Validation of an Image Analysis Method for Evaluating the Chemical Resistance of Glass Fibers to Alkaline Environments

Validation of an Image Analysis Method for Evaluating the Chemical Resistance of Glass Fibers to Alkaline Environments

Scientometric Analysis of Global Research on the Utilization of Geopolymer Composites in Construction Applications

Methodology of Analysis of Fibre Sedimentation in HPC mixtures

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