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Vute Sirivivatnanon

Bio: Vute Sirivivatnanon is an academic researcher from University of Technology, Sydney. The author has contributed to research in topics: Cement & Fly ash. The author has an hindex of 19, co-authored 53 publications receiving 3137 citations. Previous affiliations of Vute Sirivivatnanon include University of New South Wales & Commonwealth Scientific and Industrial Research Organisation.


Papers
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Journal ArticleDOI
TL;DR: In this article, the basic properties viz., workability and strength of geopolymer mortar made from coarse lignite high calcium fly ash were investigated, and the results revealed that the workable flow of the geopolymers was in the range of 110 −±5% −135 −± 5% and was dependent on the ratio by mass of sodium silicate to NaOH and the concentration of NaOH.
Abstract: In this paper, the basic properties viz., workability and strength of geopolymer mortar made from coarse lignite high calcium fly ash were investigated. The geopolymer was activated with sodium hydroxide (NaOH), sodium silicate and heat. The results revealed that the workable flow of geopolymer mortar was in the range of 110 ± 5%–135 ± 5% and was dependent on the ratio by mass of sodium silicate to NaOH and the concentration of NaOH. The obtained compressive strength was in the range of 10–65 MPa. The optimum sodium silicate to NaOH ratio to produce high strength geopolymer was 0.67–1.0. The concentration variation of NaOH between 10 M and 20 M was found to have a small effect on the strength. The geopolymer samples with high strength were obtained with the following practices: the delay time after moulding and before subjecting the sample to heat was 1 h and the optimum curing temperature in the oven was 75 °C with the curing duration of not less than two days.

706 citations

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TL;DR: In this article, the early stage reaction kinetics of metakaolin/sodium silicate and sodium hydroxide geopolymer system were investigated, and the setting and early strength development characteristics, and associated mineral and microstructural phase development of mixtures containing varying SiO 2 /Al 2 O 3 ratios, cured at 40°C for up to 72h, were carefully studied.

627 citations

Journal ArticleDOI
TL;DR: In this article, the influence of fineness of fly ash on water demand and some of the properties of hardened mortar are examined and it is suggested that the fine fly ash is more reactive and its use resulted in a denser cement matrix and better mechanical properties of mortar.

393 citations

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TL;DR: In this article, a study of the resistance to chloride penetration of blended Portland cement mortar containing ground palm oil fuel ash (POA), ground rice husk ash (RHA), and fine fly ash (FA) is presented.

296 citations

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TL;DR: In this paper, the suitability of a particular binder system for an application based on fresh concrete properties and mechanical properties was evaluated for concrete mixes having a fixed waterbinder ratio of 0.35 and a constant total binder content of 430 kg/m3.

251 citations


Cited by
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Journal ArticleDOI
TL;DR: An overview of advances in geopolymers formed by the alkaline activation of aluminosilicates is presented along with opportunities for their use in building construction as mentioned in this paper, with respect to fresh and hardened states, interfacial transition zone between aggregate and geopolymer, bond with steel reinforcing bars and resistance to elevated temperature.

899 citations

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TL;DR: Alkali-activated binders have emerged as an alternative to OPC binders, which seems to have superior durability and environmental impact as mentioned in this paper, and the proper terminology to designate these new binders will be discussed.

800 citations

Journal ArticleDOI
01 Jun 2011-Fuel
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

Journal ArticleDOI
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