Author
Ta-Wui Cheng
Other affiliations: National Taipei University
Bio: Ta-Wui Cheng is an academic researcher from National Taipei University of Technology. The author has contributed to research in topics: Geopolymer & Compressive strength. The author has an hindex of 26, co-authored 76 publications receiving 2453 citations. Previous affiliations of Ta-Wui Cheng include National Taipei University.
Topics: Geopolymer, Compressive strength, Metakaolin, Fly ash, Incineration
Papers
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TL;DR: In this paper, the use of granulated blast furnace slag as an active filler in the making of geopolymers was described, and a 10 mm thick geopolymer panel was exposed to a 1100 °C flame, with the measured reverse-side temperatures reaching less than 350 °C after 35 min.
719 citations
TL;DR: In this paper, a mixture of metakaolin and alkali solution at a fixed ratio at room temperature and then pre-crashed to a fixed-radius size was used to make a geopolymer for heavy metal adsorption.
318 citations
TL;DR: In this article, the effects of the SiO 2 /Na 2 O molar ratio (1.0-2.0) on nano-SiO 2 metakaolin-based geopolymers were investigated.
185 citations
TL;DR: The physical and mechanical properties of the microstructure materials are improved by using one-step post-heat treatment process after plasma vitrification, which has great potential to serve as a viable alternative for construction applications.
96 citations
TL;DR: In this paper, the results of the feasibility study of utilizing fly ash from municipal waste incinerators by powder sintering technology were reported. But the major phase exhibited is gehlenite (Ca2Al2SiO7), which belongs to the melilite group.
95 citations
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TL;DR: In this paper, the authors present the work carried out on the chemical reaction, the source materials, and the factor affecting geopolymerization, and demonstrate that certain mix compositions and reaction conditions such as Al2O3/SiO2, alkali concentration, curing temperature with curing time, water/solid ratio and pH significantly influences the formation and properties of a geopolymers.
Abstract: Geopolymerization is a developing field of research for utilizing solid waste and by-products. It provides a mature and cost-effective solution to many problems where hazardous residue has to be treated and stored under critical environmental conditions. Geopolymer involves the silicates and aluminates of by-products to undergo process of geopolymerization. It is environmentally friendly and need moderate energy to produce. This review presents the work carried out on the chemical reaction, the source materials, and the factor affecting geopolymerization. Literature demonstrates that certain mix compositions and reaction conditions such as Al2O3/SiO2, alkali concentration, curing temperature with curing time, water/solid ratio and pH significantly influences the formation and properties of a geopolymer. It is utilized to manufacture precast structures and non-structural elements, concrete pavements, concrete products and immobilization of toxic metal bearing waste that are resistant to heat and aggressive environment. Geopolymers gain 70% of the final strength in first 3–4 h of curing.
1,078 citations
TL;DR: In this article, the authors carried out a detailed environmental evaluation of geopolymer concrete production using the Life Cycle Assessment methodology and found that the production of most standard types of OPC concrete has a slightly lower impact on global warming than standard Ordinary Portland Cement.
868 citations
TL;DR: A review of the most important research findings over the last 25 years is presented in this paper, which elucidates chemistry and reaction mechanisms for most important categories of materials involved, identifies the gaps in the existing body of knowledge and underlines the reasons why this promising technology has not become widely accepted by the industry.
754 citations
TL;DR: In this article, the authors compare the properties of slag and metakaolin cements, including the general properties of metakaol and slag, hydration products reaction mechanisms, and the role of Ca and Al.
748 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