High-Strength Geopolymer Using Fine High-Calcium Fly Ash

Chindaprasirt, Prinya; Chareerat, T.; Hatanaka, Shigemitsu; Cao, Trinh

doi:10.1061/(asce)mt.1943-5533.0000161

Cited by 269 publications

(84 citation statements)

References 30 publications

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“…Because of the geopolymer synthesis starts with the leaching of silica and aluminum on the surface of fly ash prior to condensation, it makes sense if the greater surface area will propose the greater amount of silica and aluminum to be leached which will result in higher rate of geopolymerization. Gunasekara et al [40] proved that the higher the surface area and experiment conducted by Chindaprasirt et al [41] also confirmed that the finer the particle size of fly ash, the higher the compressive strength of fly ash based geopolymer. Moreover, a study conducted by Antoni, et al [14] indicates that fly ash with finer particle tends to have accelerated initial setting time.…”

Section: Variations In Physical Propertiesmentioning

confidence: 92%

“…Furthermore, from the review of some previous studies, it seems that variation in chemical composition of the fly ash has less effect on the workability, with the exclusion of flash setting problems. On the other hand, the workability (measured by flow) of fly ash based geopolymers increased with an increase in fly ash fineness [41]. However, it is important to be noted that particle shape has a dominant influence on the workability.…”

Section: Fresh State Behaviorsmentioning

confidence: 96%

“…On the opposite, Chindaprasirt et al [41] showed that setting time of fly ash based geopolymer affected by the particle size of fly ash. This contrary statement may be due to a different type of fly ash used, where the earlier used fly ash with CaO content below 10%, while the latter used fly ash with CaO content more than 10%.…”

Section: Fresh State Behaviorsmentioning

confidence: 99%

See 2 more Smart Citations

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

Wattimena¹,

Antoni²,

Hardjito³

2017

AIP Conference Proceedings

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Abstract. There are more than four decades since the last 1970s where geopolymers concrete was first introduced and developed to use as a replacement to conventional concrete material which uses cement as a binder. And since the last two decades, geopolymers which utilized fly ash as aluminosilicate source material, i.e. fly ash based geopolymers, have been investigated. Many researchers present how to produce the best fly ash based geopolymer with a various source of constituent material as well as mixing formula to achieve exceptional concrete performance. Although there is a similar trend towards factors affecting the result of fly ash based geopolymer synthesis, there is still remain a wide range in mixture proportion. The considerable variation in fly ash characteristics as source material in the synthesis can very likely be one of the causes of this problem. This paper attempts to identify the effect of source material variation of geopolymer concrete, particularly which use fly ash as source material and focuses on the variation of its characteristics and the effects to properties of concrete. From the reviews it concluded that different sources (and even the same source, but different batch) of fly ash materials will give some different characteristics of the fly ash, where it would affect the synthesis process of the fly ash based geopolymer concretes.

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Section: Variations In Physical Propertiesmentioning

confidence: 92%

Section: Fresh State Behaviorsmentioning

confidence: 96%

See 1 more Smart Citation

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

Wattimena¹,

Antoni²,

Hardjito³

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

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“…But, for those with flash setting tendency, the S/N ratio does not really affect the setting time. as indicated by Chindaprasirt et al [7]. The increase at later age strength suggest that there could be a hydration reaction takes place beside the geopolymer reaction.…”

Section: Resultsmentioning

confidence: 70%

“…Low calcium fly ash geopolymer commonly has long setting time and requires heat for curing. On the other hand, high calcium fly ash creates challenges, when it is used for making geopolymer concrete [6][7][8]. Higher strength is typically obtainable when using high calcium fly ash, however the occurrence of rapid setting may hinder its application in large volume.…”

Section: Introductionmentioning

confidence: 99%

Effect of Variability of Fly Ash Obtained from the Same Source on the Characteristics of Geopolymer

2017

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Abstract. Geopolymer properties is notably influenced by the quality of fly ash used as the precursor material. Fly ash obtained from the same source may have varying physical and chemical characteristics. The characteristics are influenced by, among other, the method and temperature of burning, the degree of grinding and the quarry sources of the coal. In this study, high calcium fly ash from a single power plant was investigated, to analyze the effect of its variability on the characteristics of geopolymer mortar. Fly ash samples were collected at ten different sampling periods. Three mixture compositions, with different sodium silicate solution to sodium hydroxide ratios, were prepared to produce geopolymer mortars. From the results, it was found that there are broad variation of fly ash chemical properties, however only small variation on the fineness and LOI was discovered. The setting time and compressive strength of geopolymer are influenced by the fly ash particle size, pH value and chemical content. Higher level of calcium oxide content increases the compressive strength, while finer particle size could have effect on the later age increase of the compressive strength. Faster setting time is also correlated with the higher pH value of the fly ash, with the tendency of flash setting occurrence for geopolymer using fly ash of high pH level.

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The Role of SiO ₂ and Al ₂ O ₃ on the Properties of Geopolymers with and without Calcium

Silva

Hanjitsuwan

Chindaprasirt

2013

Ceramic Engineering and Science Proceedings

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High-Strength Geopolymer Using Fine High-Calcium Fly Ash

Cited by 269 publications

References 30 publications

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

Effect of Variability of Fly Ash Obtained from the Same Source on the Characteristics of Geopolymer

The Role of SiO ₂ and Al ₂ O ₃ on the Properties of Geopolymers with and without Calcium

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High-Strength Geopolymer Using Fine High-Calcium Fly Ash

Cited by 269 publications

References 30 publications

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

A review on the effect of fly ash characteristics and their variations on the synthesis of fly ash based geopolymer

Effect of Variability of Fly Ash Obtained from the Same Source on the Characteristics of Geopolymer

The Role of SiO 2 and Al 2 O 3 on the Properties of Geopolymers with and without Calcium

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The Role of SiO ₂ and Al ₂ O ₃ on the Properties of Geopolymers with and without Calcium