Author
Chai Jaturapitakkul
Bio: Chai Jaturapitakkul is an academic researcher from King Mongkut's University of Technology Thonburi. The author has contributed to research in topics: Portland cement & Compressive strength. The author has an hindex of 43, co-authored 120 publications receiving 7443 citations.
Topics: Portland cement, Compressive strength, Fly ash, Cement, Pozzolan
Papers published on a yearly basis
Papers
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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
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
TL;DR: In this paper, the effect of fly ash fineness on compressive strength, porosity, and pore size distribution of hardened cement pastes was investigated and it was shown that the blended cement paste with classified fly ash produced paste with higher compressive power than that with original fly ash.
Abstract: This paper presents an experimental investigation on the effect of fly ash fineness on compressive strength, porosity, and pore size distribution of hardened cement pastes. Class F fly ash with two fineness, an original fly ash and a classified fly ash, with median particle size of 19.1 and 6.4 μm respectively were used to partially replace portland cement at 0%, 20%, and 40% by weight. The water to binder ratio (w/b) of 0.35 was used for all the blended cement paste mixes. Test results indicated that the blended cement paste with classified fly ash produced paste with higher compressive strength than that with original fly ash. The porosity and pore size of blended cement paste was significantly affected by the replacement of fly ash and its fineness. The replacement of portland cement by original fly ash increased the porosity but decreased the average pore size of the paste. The measured gel porosity (5.7–10 nm) increased with an increase in the fly ash content. The incorporation of classified fly ash decreased the porosity and average pore size of the paste as compared to that with ordinary fly ash. The total porosity and capillary pores decreased while the gel pore increased as a result of the addition of finer fly ash at all replacement levels.
534 citations
TL;DR: In this paper, the effects of pozzolan made from various byproduct materials on mechanical properties of high-strength concrete were investigated and the results suggest that concretes containing FA, FB, RHBA, and POFA can be used as pozzolic materials in making high strength concrete with 28-day compressive strengths higher than 80 MPa.
359 citations
TL;DR: In this article, the effect of fly ash fineness on pore size and microstructure of hardened blended cement pastes was investigated and it was shown that the pore sizes of blended blended cement paste were significantly affected by the rate of replacement and the fineness of the fly ash.
296 citations
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TL;DR: The concrete industry is known to leave an enormous environmental footprint on Planet Earth as discussed by the authors, which contributes to the general appearance that concrete is not particularly environmentally friendly or compatible with the demands of sustainable development.
Abstract: The concrete industry is known to leave an enormous environmental footprint on Planet Earth. First, there are the sheer volumes of material needed to produce the billions of tons of concrete worldwide each year. Then there are the CO2 emissions caused during the production of Portland cement. Together with the energy requirements, water consumption and generation of construction and demolition waste, these factors contribute to the general appearance that concrete is not particularly environmentally friendly or compatible with the demands of sustainable development. This paper summarizes recent developments to improve the situation. Foremost is the increasing use of cementitious materials that can serve as partial substitutes for Portland cement, in particular those materials that are by-products of industrial processes, such as fly ash and ground granulated blast furnace slag. But also the substitution of various recycled materials for aggregate has made significant progress worldwide, thereby reducing the need to quarry virgin aggregates. The most important ones among these are recycled concrete aggregate, post-consumer glass, scrap tires, plastics, and by-products of the paper and other industries.
1,120 citations
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
TL;DR: In this paper, a fly ash-based geopolymer concrete for curing in ambient condition can be proportioned for desirable workability, setting time, and compressive strength using ground granulated blast-furnace slag (GGBFS) as a small part of the binder.
855 citations
TL;DR: A brief status of recycled aggregate concrete made from recycled aggregate, summarizes and critically analyses some of the most important research findings over the past few years regarding the material aspects is given in this article.
763 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