Effect of Concrete Waste on Compressive Strength and Microstructure Development of Ceramic Geopolymer Pastes
04 Sep 2019-Transactions of The Indian Ceramic Society (Taylor & Francis)-Vol. 78, Iss: 3, pp 146-154
TL;DR: In this article, the authors present the effects of concrete waste incorporating dolomite aggregate on ceramic-based manufacturing processes and show that concrete waste can pollute and damage the environment.
Abstract: Ceramic industry generates a large amount of wastes, which pollutes and damages the environment. This paper presents the effects of concrete waste incorporating dolomite aggregate on ceramic-based ...
Citations
More filters
TL;DR: In this paper, the authors evaluated the reliability of a new algorithmic mix design method that relies on pre-targeting ratios of SiO2/Al2O3, Na2O/SiO2 and liquid/solid of CW precursor powder and sodium silicate and sodium hydroxide alkaline reagents.
51 citations
TL;DR: An overview of published articles about geopolymers containing recycled brick powder (RBP) and recycled concrete powder (RCP) during the last decade (2012 to 2021) is presented in this paper .
31 citations
TL;DR: In this article, the use of binary system of concrete waste (CW) and red clay brick waste (BW) to develop geopolymer binders with appropriate fresh properties and high mechanical strengths at ambient curing was investigated.
22 citations
TL;DR: In this paper, the authors explored the development of an optimized binary geopolymer system of tile waste (CTW) and concrete waste (CW) for more sustainable use in in-situ applications.
Abstract: This study explored the development of an optimized binary geopolymer system of ceramic tile waste (CTW) and concrete waste (CW) for more sustainable use in in-situ applications. The geopolymer binders were synthesized based on a physico-chemical method of different CTW and CW combinations, between 20% and 80%, predetermined liquid-to-solid (L/S) and chemical parameters of SiO 2/Al2O3 and Na2O/SiO2 ratios, while using curing at room temperature. The flow spread diameters, setting times, compressive strengths and microstructural investigations of binary compositions were performed at various CTW and CW contents and preselected oxide values. Meanwhile, the effect of short-term elevated temperatures on the optimum strength combinations was also considered under 50 °C, 75 °C, and 100 °C. Moreover, further optimization was tried at ambient curing by incorporating supplementary cementitious materials (SCM) in ternary CTW-CW-SCM compositions including 15%, 30% and 45% of metakaolin (MK), ground granulated blast furnace slag (GGBS), Class C fly ash (FC) and Class F fly ash (FF). X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transformed infrared spectroscopy (FTIR) were performed to investigate the effect of the mentioned parameters on geopolymer formations. The results indicate that the optimum binary CTW + CW composition can be reached at 40% CTW + 60% CW and SiO 2/Al2O3 and Na2O/SiO2 of 12.3 and 0.18, respectively. Adding 45% GGBS content in ternary mixtures helped attain very high strength binders of more than 100 MPa at normal conditions. Along with the designed physical and chemical ratios, the amount of Ca2+ played a dominant role in enhancing the degree of geopolymerization and the properties of C-A-S-H/C-S-H and N-A-S-H reaction products.
19 citations
TL;DR: In this paper, the authors explored durable and thermal stable geopolymer-based alkaline activation of pozzocrete-fly ash (PFA) doped with different ratios of ceramic tile waste (CW) compared to their plain mixtures under normal conditions.
12 citations
References
More filters
TL;DR: In this paper, the effects of ground granulated blast furnace slag (GGBFS) on the microstructure and mechanical properties of metakaolin (MK) based geopolymers were studied.
922 citations
TL;DR: In this paper, ground fly ash (GFA), with a median particle size of 10.5μm, was used as source material for making geopolymers cured at room temperature, and compressive strength tests and microstructure observations using SEM, EDX, XRD and FTIR were performed.
755 citations
01 Jan 2005
TL;DR: The first part of the work carried out by the geopolymer research group at Curtin University of Technology as discussed by the authors describes the development and properties of heat-cured low-calcium fly ash-based concrete.
Abstract: This Research Report describes the first part of the work carried out by the geopolymer research group at Curtin University of Technology. It describes the development and properties of heat-cured low-calcium fly ash-based geopolymer concrete. This Report will be followed by two other Reports describing the long-term properties of geopolymer concrete, and the behaviour of reinforced geopolymer concrete beams and columns.
723 citations
Book•
01 Jan 2009
TL;DR: In this article, the authors describe the synthesis and characterization of fly ash glass chemistry and inorganic polymer cements for geopolymers and their application in nuclear waste immobilization and toxic waste removal.
Abstract: Introduction to geopolymers Part 1 Geopolymer synthesis and characterisation: Fly ash glass chemistry and inorganic polymer cements Geopolymer precursor design Activating solution chemistry for geopolymers Nanostructure/microstructure of metakaolin geopolymers Nanostructure/microstructure of fly ash geopolymers Geopolymer synthesis kinetics Part 2 Manufacture and properties of geopolymers: Accelerated ageing of geopolymers Chemical durability of geopolymers Life-cycle analysis of geopolymers Engineering properties of geopolymer concrete Producing fire and heat-resistant geopolymers Utilisation of mining wastes to produce geopolymer binders Utilisation of non-thermally activated clays in the production of geopolymers Thermal properties of geopolymers Utilisation of low-calcium slags to improve the strength and durability of geopolymers Part 3 Applications of geopolymers: Commercialisation of geopolymers for construction: Opportunities and obstacles Geopolymers for nuclear waste immobilization Immobilization of toxic waste in geopolymers
585 citations
TL;DR: The results show that both fly ash and bottom ash can be utilized as source materials for the production of geopolymers and the moderate NaOH concentration of 10 M is found to be suitable and gives fly ashand bottom ash geopolymer mortars with compressive strengths of 35 and 18 MPa.
541 citations