Influence of superplasticizer on the properties of geopolymer concrete using industrial wastes

Mithanthaya, I. R.; Marathe, Shriram; Rao, N. B. S.; Bhat, V. Vijendra

doi:10.1016/j.matpr.2017.06.270

Cited by 18 publications

(9 citation statements)

References 3 publications

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“…AAMs have identified the first-or second-generation superplasticizers (i.e., LSs or naphthalene-based ones) as the most functional [13,21,24,45,46]. This is in agreement with the present study.…”

Section: Most Of the Earlier Published Studies (Table 2) Of Superplas...supporting

confidence: 92%

“…Recently, there has been a pronounced interest in onepart ("just add water") AAMs (in which both the aluminosilicate precursor and activator are in solid form) [15]. Although several studies have aimed to use commercial superplasticizers in both low [16][17][18][19][20] and high calcium [21][22][23][24] conventional two-part AAMs, very few studies exist for one-part systems. For instance, Ye et al [25] used an LS-based superplasticizer in a one-part red mud-based geopolymer paste to reduce the water/solid ratio from 0.55 to 0.45.…”

Section: Introductionmentioning

confidence: 99%

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Suitability of commercial superplasticizers for one-part alkali-activated blast-furnace slag mortar

Luukkonen

Abdollahnejad

Ohenoja

et al. 2019

Journal of Sustainable Cement-Based Materials

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Alkali-activated materials are a low-CO2 alternative for Portland cement in construction. However, one major issue in their use is the poor or varying functionality of the currently available commercial superplasticizers. Especially for one-part ("just add water") alkali-activated materials, the number of studies is limited. In this study, one-part alkali-activated mortar was prepared from blast furnace slag by using solid sodium hydroxide as an activator and microsilica as an additional silica source. Comparison of commonly used superplasticizer types revealed that lignosulfonate, melamine, and naphthalene-based superplasticizers are more efficient than the currently most used polyacrylate and polycarboxylatesuperplasticizers. Lignosulfonate-based superplasticizer was overall bestperforming: it improved significantly the workability (+41% spread, -51% yield stress, -27% viscosity), setting time (+70%), and compressive strength (+19%) at a 0.5 wt% dose. When the amount of water and superplasticizer were optimized, compressive strength of mortar could be doubled (from 19 to 38 MPa at 28 d).

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Section: Most Of the Earlier Published Studies (Table 2) Of Superplas...supporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Suitability of commercial superplasticizers for one-part alkali-activated blast-furnace slag mortar

Luukkonen

Abdollahnejad

Ohenoja

et al. 2019

Journal of Sustainable Cement-Based Materials

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“…The test results yield an inference that addition of GGBS in fly ash increases the compressive strength upto 40% replacement [13,14]. The presence of calcium content in GGBS seems to be a real contributor for increase in strength upto 40% after which microstructure gets altered causing decrease in compressive strength.…”

Section: Compressive Strengthmentioning

confidence: 92%

Geopolymer Concrete under Ambient Curing

Anbarasan¹,

Sanjaiyan²,

Soundarapandiyan³

2021

Advances in Geopolymer-Zeolite Composites - Synthesis and Characterization

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Geopolymer concrete (GPC) has significant potential as a more sustainable alternative for ordinary Portland cement concrete. GPC had been introduced to reduce carbon footprints and thereby safeguarding environment. This emerging eco friendly construction product finds majority of its application in precast and prefabricated structures due to the special curing conditions required. Sustained research efforts are being taken to make the product suitable for in situ applications. The developed technology will certainly address the issues of huge energy consumption as well reduce water use which is becoming scarce nowadays. Ground Granulated Blast Furnace Slag (GGBS) a by-product of iron industries in combination with fly ash has proved to give enhanced strength, durability as well reduced setting time. This study investigates the effect of GGBS as partial replacement of fly ash in the manufacture of GPC. Cube and cylindrical specimens were cast and subjected to ambient curing as well to alternate wetting-drying cycles. The 28 day compressive strength, split tensile strength, flexural strength and density of GPC specimens were found. The study revealed increase in compressive strength, split tensile strength, density as well flexural strength up to 40 percent replacement of fly ash by GGBS.

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“…However, surface cracks caused by the shrinkage of the alkali-activated slag concrete have been reported by some investigators [10]. Moderate compressive strength with the participation of slag in GPC at ambient curing has been reported by some investigators [21,25,[32][33][34]. Accelerated polymerization process among fly ash, GGBFS, and AAS are predominant at 60°C [25,35].…”

Section: Effect Of Ggbfs On Compressive Strength Of Gpcmentioning

confidence: 98%

Effect of GGBFS on Workability and Strength of Alkali-activated Geopolymer Concrete

Gautam

Mishra

2021

Civ Eng J

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This paper focuses on the development of a concrete material by utilizing fly ash and blast furnace slag in conjunction with coarse and fine aggregates with an aim to reduce pollution and eliminate the use of energy extensive binding material like cement. Alternative binding materials have been tried with an aim to get rather an improved concrete material. Alkali-Activated Solution (AAS) made of the hydroxide and silicate solutions of sodium was adopted as the liquid binder whereas, Class F” fly ash and Ground Granulated Blast Furnace Slag (GGBFS) mixed in dry state were used as the Geopolymer Solid Binder (GSB). The liquid binder was used to synthesize the solid binder by thermal curing. The paper investigates the use, influence and relative quantities of the liquid and solid binders in the development of the alkali-activated GGBFS based Geopolymer Concrete (GPC). Varying ratios of AAS to GSB were taken to assess their optimum content. Further, different percentages of GGBFS were used as a partial replacement of Class F fly ash to determine the optimum replacement of GGBFS in the GPC. In order to assess their effects on various properties test samples of cubes, cylinders and beams were cast and tested at 3, 7, and 28 days. Thermal curing of GPC has also resorted for favorable results. It was found that AAS to GSB ratio of 0.5 and GGBFS content of 80% yielded the maximum strength with a little unfavorable effect on workability. The overall results indicated that AAS and GGBFS offer good geopolymer concrete which will find its applicability in water scarce areas. Doi: 10.28991/cej-2021-03091708 Full Text: PDF

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Influence of superplasticizer on the properties of geopolymer concrete using industrial wastes

Cited by 18 publications

References 3 publications

Suitability of commercial superplasticizers for one-part alkali-activated blast-furnace slag mortar

Suitability of commercial superplasticizers for one-part alkali-activated blast-furnace slag mortar

Geopolymer Concrete under Ambient Curing

Effect of GGBFS on Workability and Strength of Alkali-activated Geopolymer Concrete

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