Fresh and Hardened Properties of Fly Ash–Slag Blended Geopolymer Paste and Mortar

Samantasinghar, Subhashree; Singh, Suresh Prasad

doi:10.1186/s40069-019-0360-1

Cited by 101 publications

(47 citation statements)

References 22 publications

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“…Therefore, it required more water to lubricate the particle surface, and, thus, it exhibited less consistency values. Similar results were published by Samantasinghar et al [19].…”

Section: Ns0pc 0ns15pcsupporting

confidence: 92%

Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete

et al. 2019

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This research presents the influence of ordinary Portland cement (OPC) and/or water glass addition on fly ash alkali-activated mortar and concrete. The results show that fly ash (FA) concrete activated with a NaOH solution and water glass mixture had better resistance to freeze and thaw, carbonation, alkali-silica reaction (ASR) and developed higher compressive strength and static elastic modulus compared with the FA concrete activated only with an NaOH solution. The addition of OPC contributes to the development of a denser microstructure of alkali activated concrete (AAC) samples. In the presence of water glass and OPC, the compressive strength (52.60 MPa) of the samples increased more than two times as compared with the reference sample (21.36 MPa) without OPC and water glass. The combination of OPC and water glass showed the increased strength and enhanced durability of AAC. The samples were more resistant to freeze and thaw, ASR, and carbonation.

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“…Therefore, it required more water to lubricate the particle surface, and, thus, it exhibited less consistency values. Similar results were published by Samantasinghar et al [19].…”

Section: Ns0pc 0ns15pcsupporting

confidence: 92%

Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete

et al. 2019

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“…The rapid solidification of GGBFS incorporated mixtures can be attributed to the difference in dissolution and activation kinetics of the FA and GGBFS. As reported before [13,41], the main reason of the accelerated solidification rate by the GGBFS incorporation to FA systems could be associated to the rapid formation of some reaction products through the interaction of Ca 2+ released from the GGBFS with silicates and aluminates.…”

Section: Setting Timesmentioning

confidence: 62%

“…Criado [3] also reported two different reaction products of calcium aluminosilicate hydrate (C-A-S-H), and sodium aluminosilicate hydrate (N-A-S-H) with a higher number of polymerized species and low Ca content for alkali-activated slag and fly ash mixtures. The binary binders (GGBFS and FA) cured at room temperature showed better mechanical properties as compared to alkaliactivated FA systems since both C-S-H and N-A-S-H are incorporated into the final product [12][13][14]. Activator type has also a significant effect on the microstructural development of AAC.…”

Section: Introductionmentioning

confidence: 99%

Effects of activator properties and GGBFS/FA ratio on the structural build-up and rheology of AAC

Dai

Aydın

Yardımcı

et al. 2020

Cement and Concrete Research

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“…In terms of strength development with time, Figure 3 a–d shows that, on average, SFC specimens gained approximately 80% of their 28-day strength value after three days. This trend reflects the established ability of geopolymer grouts to gain early strength rapidly [ 47 ] and offers a significant benefit for pavement applications where high early strength leading to early potential exposure to traffic is preferential. It is also clear from Figure 3 that there is a general negative influence of RAP addition on compressive strength.…”

Section: Resultsmentioning

confidence: 87%

A Preliminary Characterisation of Innovative Semi-Flexible Composite Pavement Comprising Geopolymer Grout and Reclaimed Asphalt Planings

2020

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This article considers semi-flexible composite (SFC) pavement materials made with reclaimed asphalt planings (RAP) and geopolymer cement-based grouts. Geopolymer grouts were developed and used to fill the internal void structure of coarse RAP skeletons with varying levels of porosity. The geopolymer grouts were formulated at ambient temperature using industrial by-products to offer economic and environmental savings relative to conventional Portland cement-based grouting systems. They were characterised on flowability, setting time, and compressive strength. The effect of grout and RAP on SFC material performance was evaluated using permeable porosity, compressive strength, and ultrasonic pulse velocity. SFC performance was significantly influenced by both grout type and RAP content. Improved performance was associated with mixtures of high-flowability/high-strength grout and low RAP content. A practical limitation was identified for combination of grout with low-flowability/fast-setting time and well-compacted RAP skeletons. Solids content exceeding 49% by volume was not feasible, owing to inadequate grout penetration. A suite of SFC materials was produced offering performance levels for a range of practical pavement applications. Preliminary relationships enabling prediction of SFC elastic modulus based on strength and/or ultrasonic pulse velocity test data are given. A pavement design is given using SFC as a sub-base layer for an industrial hardstanding.

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Fresh and Hardened Properties of Fly Ash–Slag Blended Geopolymer Paste and Mortar

Cited by 101 publications

References 22 publications

Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete

Effect of Ordinary Portland Cement and Water Glass on the Properties of Alkali Activated Fly Ash Concrete

Effects of activator properties and GGBFS/FA ratio on the structural build-up and rheology of AAC

A Preliminary Characterisation of Innovative Semi-Flexible Composite Pavement Comprising Geopolymer Grout and Reclaimed Asphalt Planings

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