Study of mechanical and microstructural properties of geopolymer concrete with GGBS and Metakaolin

Kumar, Pratyush; Pankar, Chaitanya; Manish, Divyank; Santhi, A. S.

doi:10.1016/j.matpr.2018.10.054

Cited by 33 publications

(10 citation statements)

References 9 publications

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“…Generally, Si-O-Si and Si-O-Al stretching band appear at 1004 cm −1 . Figures 10-12 clearly show that the increase in the addition of SH concentration shifts the peaks towards lower frequency at 1004 cm −1 , which is attributed to asymmetric stretching vibrations of Si-O-Si and Si-O-Al group present in the geopolymer concrete material [26,27]. us, the geopolymerization taken place by the addition of SH and SS to the FA and GGBS in all the ratios of samples taken has been confirmed.…”

Section: Ft-ir Analysismentioning

confidence: 59%

Effect of Alkali Activator on the Standard Consistency and Setting Times of Fly Ash and GGBS‐Based Sustainable Geopolymer Pastes

Dineshkumar

Umarani

2020

Advances in Civil Engineering

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In this study, an attempt has been made to study the effect of alkali activator on the standard consistency and setting times of low calcium fly ash (FA) and ground granulated blast furnace slag (GGBS)- based sustainable geopolymer pastes. Different proportions of FA and GGBS were blended into mixes of geopolymer paste using sodium hydroxide (SH) and sodium silicate (SS) as alkaline activator solution (AAS). Tests on geopolymer pastes for consistency and initial and final setting times were carried out for three different SH : SS ratios of 1 : 1, 1 : 2, and 1 : 3 for both 2.5 M (molarity) and 5.0 M of SH concentration. While increasing the molarity of SH, both consistency and setting time decreased. For all the blended binder mix, the setting time decreases with an increase in the quantity of SS in the alkali activator solution. An increase in the amount of GGBS content in the geopolymer blended binder mix increases the consistency and decreases the setting time. For both 2.5 M and 5 M blended geopolymer mixes, a decrease in the percentage of GGBS and an increase in the percentage of FA increased the setting time. Microstructural studies such as X-ray fluorescence analysis (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR) analyses were carried out, and the results are presented. The FT-IR spectra for the blended binder mixes demonstrated the formation of geopolymerization and the presence of the functional groups.

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Section: Ft-ir Analysismentioning

confidence: 59%

Effect of Alkali Activator on the Standard Consistency and Setting Times of Fly Ash and GGBS‐Based Sustainable Geopolymer Pastes

Dineshkumar

Umarani

2020

Advances in Civil Engineering

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“…Alkali-activated cements (AAC), as prominent representatives of waste utilization, are becoming increasingly known material systems. One of the great advantages is that these systems can use wastes (e.g., construction and demolition wastes, rubber tires, glass, and mine tailings) not only as an aggregate [14][15][16][17], but also as a matrix [18][19][20][21][22][23]. Several industrial by-products and waste materials are recognized as raw materials [24]; e.g., in the case of blast furnace slag and fly ash, AACs can provide a solution for treating nearly 50 wt% of the waste generated [25].…”

Section: Introductionmentioning

confidence: 99%

Development of Alkali Activated Inorganic Foams Based on Construction and Demolition Wastes for Thermal Insulation Applications

2023

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Nowadays, the construction industry is challenged not only by increasingly strict environmental regulations, but also by a shortage of raw materials and additives. It is critical to find new sources with which the circular economy and zero waste approach can be achieved. Promising candidates are alkali activated cements (AAC), which offer the potential to convert industrial wastes into higher added value products. The aim of the present research is to develop waste-based AAC foams with thermal insulation properties. During the experiments, pozzolanic materials (blast furnace slag, fly ash, and metakaolin) and waste concrete powder were used to produce first dense and then foamed structural materials. The effects of the concrete fractions, the relative proportions of each fraction, the liquid/solid ratio, and the amount of foaming agents on the physical properties were investigated. A correlation between macroscopic properties (strength, porosity, and thermal conductivity) and micro/macro structure was examined. It was found that concrete waste itself is suitable for the production of AACs, but when combined with other aluminosilicate source, the strength can be increased from 10 MPa up to 47 MPa. The thermal conductivity (0.049 W/mK) of the produced non-flammable foams is comparable to commercially available insulating materials.

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“…The production of Portland cement contributes significantly to the world's carbon dioxide (CO2) emissions, accounting for 5% to 7% of all industrial and energy-related CO2 emissions [1]. We now need to create environmentally friendly binders and cut back on the use of cement.…”

Section: Introductionmentioning

confidence: 99%

“…The 99% pure NaOH flakes were obtained from EL-Goumhoria chemical company, Cairo, Egypt while the Commercial liquid sodium silicate (LSS) was delivered from Silica Egypt Company, Burg Al-Arab, Alexandria, Egypt. The X-ray fluorescence (XRF) spectrometer for the chemical compositions of Metakaolin (MK)and Granulated blast furnace slag (GGBFS) were determined as shown in Table(1) respectively. The XRF data showed that silica (SiO2) and alumina (Al2O3), which together make up about 95% of MK, are its principal constituents.…”

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confidence: 99%

Decolorization of Reactive Dyes, Part VI: Eco-Friendly Approach of Reactive Dye Effluents Decolorization Using Geopolymer Cement Based on Metakaolin backed by slag

Ahmed

Aly²,

El‐Apasery

et al. 2022

Egypt. J. Chem.

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Study of mechanical and microstructural properties of geopolymer concrete with GGBS and Metakaolin

Cited by 33 publications

References 9 publications

Effect of Alkali Activator on the Standard Consistency and Setting Times of Fly Ash and GGBS‐Based Sustainable Geopolymer Pastes

Effect of Alkali Activator on the Standard Consistency and Setting Times of Fly Ash and GGBS‐Based Sustainable Geopolymer Pastes

Development of Alkali Activated Inorganic Foams Based on Construction and Demolition Wastes for Thermal Insulation Applications

Decolorization of Reactive Dyes, Part VI: Eco-Friendly Approach of Reactive Dye Effluents Decolorization Using Geopolymer Cement Based on Metakaolin backed by slag

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