Calcium aluminate cement in castable alumina: From hydrate bonding to the in situ formation of calcium hexaluminate

Salomão, R.; Kawamura, Mirian A.; Emilio, Ana B.V.; Sakihama, J.; Segadães, Ana M.

doi:10.1016/j.ceramint.2021.02.066

Cited by 20 publications

(1 citation statement)

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“…High-alumina cement is more suitable for application in concrete components under high-temperature environments [15][16]. In the present study, basalt fiber and steel fiber prismatic concrete containing high-alumina cement, basalt fiber TRC and steel fiber TRC were prepared, and compressive and flexural tests of the matrix concrete, four-point bending tests of the TRC sheets, and corresponding microscopic electron microscopy scanning and X-ray diffraction analysis were carried out.…”

Section: Introductionmentioning

confidence: 98%

Mechanical Performance of Textile Reinforced Concrete Containing Steel Fibers and Basalt Fibers Subjected to High Temperatures

Xu¹

2021

Ceramics - Silikaty

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Textile reinforced concrete (TRC) was prepared from high-alumina cement mixed with short-cut basalt fiber or steel fiber for the objective to analyze the mechanical performance and deterioration mechanism at high temperature. The results show that the high-temperature resistance of TRC matrix concrete can be improved by adding steel fibers and basalt fibers, but the compressive strength of concrete decreases with the increase of temperature in a quadratic parabolic law, while the flexural strength decreases in a linear law. The addition of basalt fiber significantly improves the bending bearing capacity of the TRC plates. In comparison, the addition of steel fiber significantly improves the flexural strength of TRC thin-plates above 600 °C. The scanning electron microscopy indicates that when the temperature surpasses 600 °C, the addition of basalt fiber and the steel fiber surface are significantly damaged by high-temperature deterioration. The deterioration of the mechanical performance of TRC thin-plates at high temperatures is caused mainly by changes in the chemical composition of the concrete matrix, deterioration of the fiber and damage of the bonding surface. The results obtained in this study can provide the theoretical support for the design and application of TRC in a high-temperature environment.

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Section: Introductionmentioning

confidence: 98%