Mechanical Properties and Microstructure of Class C Fly  Ash-Based Geopolymer Paste and Mortar

Li, Xueying; Ma, Xinwei; Zhang, Shoujie; Zheng, Enzu

doi:10.3390/ma6041485

Cited by 99 publications

(45 citation statements)

References 31 publications

(48 reference statements)

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“…Many studies have shown that hardening slows down due to FA replacement [30,33,34]. In the previous work, it was thought that calcium in fly ash would act as a contaminant, creating hydrate assemblages that would reduce mechanical strength and slow down the reaction rate [35]. SF6 has the highest compressive strength as compared to other binary mixes of SF, a decline happens in the compressive strength of binary mixes of SF, as the replacement ratio of SF increases in binary mixes of SF, this decrease is not as much as that occurs in binary mixes of FA.…”

Section: Compressive Strengthmentioning

confidence: 99%

Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

Benli

Karataş

Gürses

2017

Construction and Building Materials

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Section: Compressive Strengthmentioning

confidence: 99%

Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

Benli

Karataş

Gürses

2017

Construction and Building Materials

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“…In fly ash based geopolymer concrete, the amount of water content usually defined by water to solid (fly ash) ratio or in some study expressed as H O to Na O ratio. It also has been shown to affect the workability of a mixture for both low calcium [43] and high calcium [17] fly ash based geopolymer concretes. This trend of water content affecting on the workability and later on compressive strength is the same with the conventional Portland cement concrete, where the chemical reaction involved is hydration process [44].…”

Section: Fresh State Behaviorsmentioning

confidence: 99%

“…Many researchers have been investigating about the chemistry [5,6,10], the reaction mechanism [6,7,11], the fresh and hardened properties [8,[12][13][14], the microstructure [15][16][17], and so much more, about this fly ash based geopolymers concrete. Although there are so many researches have been conducted, until now, there is still no clear and standardized guide about the making procedure of fly ash based geopolymer concrete, especially in terms of structural applications.…”

Section: Fly Ash Based Geopolymers Concretementioning

confidence: 99%

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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“…Microscopic images of the fly ash-based geopolymer prepared using FA1 and FA2 are shown in Figure 4.a and Figure 4.b, respectively. The SEM micrographs revealed that the amount of calcium leads to the formation of calcium silicates in addition to geopolymer gel products (Xueying at al., 2013) [19].…”

Section: Sem Analysismentioning

confidence: 99%

Effect of fly-ash based geopolymer coated aggregate on bituminous mixtures

2018

JCE

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Effect of fly-ash based geopolymer coated aggregate on bituminous mixturesThe research presented in the paper is conducted to evaluate properties of fly ashbased geopolymer coated aggregates and their effect on characteristics of bituminous mixtures. The investigation included aggregate testing, scanning electron microscope (SEM) analysis of fly ash and fly ash-based geopolymer, Marshall mix design, indirect tension test, dynamic shear rheometer (DSR) test for rheology, and repeated load test on bituminous mixtures with fly ash-based geopolymer coated aggregates. Istraživanje prikazano u radu provedeno je u svrhu određivanja svojstava agregata obloženog geopolimerom na bazi letećeg pepela i utjecaja tih svojstava na karakteristike bitumenskih mješavina. Provedeno je ispitivanje agregata, analiza letećeg pepela i geopolimera na bazi letećeg pepela mikroskopom za elektronsko skeniranje (SEM), ispitivanje mješavina Marshallovom metodom, indirektno vlačno ispitivanje, ispitivanje reologije reometrom s dinamičkim smicanjem (DSR) te ispitivanje bitumenskih mješavina s agregatom obloženim geopolimerom na bazi letećeg pepela opetovanim opterećenjem.Ključne riječi: geopolimer na bazi letećeg pepela, obloženi agregat, bitumenske mješavine, mikroskop za elektronsko skeniranje Vorherige Mitteilung

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Mechanical Properties and Microstructure of Class C Fly Ash-Based Geopolymer Paste and Mortar

Cited by 99 publications

References 31 publications

Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

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

Effect of fly-ash based geopolymer coated aggregate on bituminous mixtures

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