“…The significant increase in mechanical resistance in ratios of 3.5 and 4 contributes to the theory that the reactions occur in a more intense and complete way, mainly after the addition of the glass waste that enhanced the mechanical resistance to flexion 8 . In the SiO 2 /Al 2 O 3 ratio of 4 there is a greater discrepancy from the nominal values found during the curing periods, because with the high molar ratio for this study the resistance is impacted, in addition to specimens with less absorption of water tend to have greater resistance because the internal pores are filled, which contributes to the increase of internal compactness 29 …”
Section: Resultsmentioning
confidence: 68%
“…It can also be seen that the waste has a fine particle size with more than 84% of the particles less than 0.1 mm in size. Therefore, this result is significant, since a coarse particle size of the waste would make it difficult to fill the matrix, in addition to contributing to the reduction of its viscosity, thus affecting the consolidation of particles during the processing step and geopolymeric reactions 29 …”
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
“…The significant increase in mechanical resistance in ratios of 3.5 and 4 contributes to the theory that the reactions occur in a more intense and complete way, mainly after the addition of the glass waste that enhanced the mechanical resistance to flexion 8 . In the SiO 2 /Al 2 O 3 ratio of 4 there is a greater discrepancy from the nominal values found during the curing periods, because with the high molar ratio for this study the resistance is impacted, in addition to specimens with less absorption of water tend to have greater resistance because the internal pores are filled, which contributes to the increase of internal compactness 29 …”
Section: Resultsmentioning
confidence: 68%
“…It can also be seen that the waste has a fine particle size with more than 84% of the particles less than 0.1 mm in size. Therefore, this result is significant, since a coarse particle size of the waste would make it difficult to fill the matrix, in addition to contributing to the reduction of its viscosity, thus affecting the consolidation of particles during the processing step and geopolymeric reactions 29 …”
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
“…The strength of the hardened pastes decreases slightly with increasing SiO 2 :Al 2 O 3 ratios and increases with increasing Al 2 O 3 :(N 2 O + K 2 O) ratios (Fig. 12) (Keppert et al , 2018). Fig.…”
The aim of this study was to help drive the Tunisian construction industry towards a more sustainable approach given the existence of abundant local raw material deposits that could be exploited for the production of low-CO2 binders. Various clay sediments from the Kebili region (southern Tunisia) were characterized by chemical analysis, X-ray diffraction, thermal analysis and geotechnical tests to determine their suitability for the preparation of geopolymer binders. The clays consist of illite and kaolinite with other accessory minerals. To test the possibility of using these materials as precursors for the production of low-CO2 and low-cost geopolymers, the raw samples were calcined and activated by addition of solid sodium silicate. Compressive strength tests performed on four alkali-activated clays show that promising mechanical performance may be achieved, with mechanical strength values as high as 25 MPa after 7 days, depending on the clay composition. The mechanical strength is related to the SiO2:Al2O3 and Al2O3:(NaO2 + K2O) ratios. Careful selection of the raw materials is, therefore, an essential step in the exploitation of clay deposits to be used for the production of ecological materials such as geopolymers.
“…This influences the rate of chemical reaction kinetics [53,76,77] and augments the plasticity of a mix which enhances the workability of geopolymers. Furthermore, they monitored that an enhancement in fly ash (FA) content has declined the workability of geopolymers because of the higher water adsorption of FA with a porous structure [78][79][80].…”
Currently, novel inorganic alumino-silicate materials, known as geopolymer composites, have emerged swiftly as an ecobenevolent alternative to contemporary ordinary Portland cement (OPC) building materials since they display superior physical and chemical attributes with a diverse range of possible potential applications. The said innovative geopolymer technology necessitates less energy and low carbon footprints as compared to OPC-based materials because of the incorporation of wastes and/or industrial byproducts as binders replacing OPC. The key constituents of ceramic are silica and alumina and, hence, have the potential to be employed as an aggregate to manufacture ceramic geopolymer concrete. The present manuscript presents a review of the performance of geopolymer composites incorporated with ceramic waste, concerning workability, strength, durability, and elevated resistance evaluation.
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