Performance of metakaolin geopolymer ceramic for fiber optic temperature sensor

Muntini, Melania Suweni; Ahmadi, Haerul

doi:10.1016/j.matpr.2018.04.071

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…This abrupt reduction corroborates the idea that at higher levels of geopolymeric reactions of material consolidation in the matrix, they occurred in a more potent way, contributing to the constitution of a more homogeneous and integral product in its constitution 33 . Even in smaller ratios, as in 2.5 and 3, the effect of simple filling of the internal pores by the waste was not able to reduce the absorption of water, because according to the literature in these cases there are some voids in the interfacial region, between the grains waste and geopolymeric paste, which justifies these higher values 8,39 …”

Section: Resultssupporting

confidence: 79%

“…Some studies in the literature have already indicated that for applications in ceramic tiles the water absorption must be up to 22%, and all the evaluated mixtures met this requirement 40 . Very low values can be problematic, as it can affect under conditions of final durability of the material, so we can indicate that with the addition of the glass waste and with a ratio of SiO 2 /Al 2 O 3 in the order of 3.5 or 4 it is suitable according to water absorption for these specimens 39 . The results of the mechanical resistance to flexion (MRF) in both conditions, without and with waste, are shown respectively in Figures 10 and 11.…”

Section: Resultsmentioning

confidence: 98%

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Use of glass polishing waste in the development of ecological ceramic roof tiles by the geopolymerization process

Azevedo¹,

Marvila²,

Rocha³

et al. 2020

Int J Applied Ceramic Tech

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The production process of ceramic roof tiles requires a large consumption of natural raw material, such as clay, and energy consumption in the sintering process. Thus, the objective of this research was the development of more ecological tile for civil construction, adopting the process of geopolymerization, which does not require burning, and the use of glass polishing waste, in partial replacement of natural raw material. Prismatic specimens were made with a ratio of alkaline solution/ (metakaolin + waste) = 0.26 and variation of the curing time in 7, 28, and 60 days, and a ratio of precursors with SiO 2 /Al 2 O 3 varying in 2.5, 3.0, 3.5, and 4.0 for the evaluation of technological properties such as apparent specific mass, linear shrinkage, water absorption, and mechanical resistance to flexion, in addition to microstructural evaluations and the physical, chemical, and mineralogical characterization of the waste. The results showed that the glass waste had potential for use as a precursor in the geopolymerization process, and that the specimens with a 7 days cure and a SiO 2 /Al 2 O 3 = 4 ratio are the most recommended for the production of roof tiles for civil construction. K E Y W O R D S ceramic roof tiles, geopolymerization, glass polishing waste How to cite this article: de Azevedo ARG, Marvila MT, Rocha HA, Cruz LR, Vieira CMF. Use of glass polishing waste in the development of ecological ceramic roof tiles by the geopolymerization process. Int

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 98%

Use of glass polishing waste in the development of ecological ceramic roof tiles by the geopolymerization process

Azevedo¹,

Marvila²,

Rocha³

et al. 2020

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

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“…In the realm of smart materials, AAM were initially used as bonding agents [20] and as encapsulants [21] for conventional sensors. However, as the understanding and the technology of AAM progresses, the need for these additional sensing devices has diminished: interrogation of changes in the electrolytic conductivity of AAM allow them to be directly used as a sensing tool in their own right [22].…”

Section: Introductionmentioning

confidence: 99%

Self-Sensing Alkali-Activated Materials: A Review

2020

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Alkali-activated materials are an emerging technology that can serve as an alternative solution to ordinary Portland cement. Due to their alkaline nature, these materials are inherently more electrically conductive than ordinary Portland cement, and have therefore seen numerous applications as sensors and self-sensing materials. This review outlines the current state-of-the-art in strain, temperature and moisture sensors that have been developed using alkali activated materials. Sensor fabrication methods, electrical conductivity mechanisms, and comparisons with self-sensing ordinary Portland cements are all outlined to highlight best practice and propose future directions for research.

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