The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature

Deb, Partha Sarathi; Nath, Pradip; Sarker, Prabir Kumar

doi:10.1016/j.matdes.2014.05.001

Cited by 719 publications

(277 citation statements)

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“…Similarly discipline was observed in series A, B, C, and D. e increase of content of slag decreased the fluidity, which confirmed the trend obtained by Deb et al [14]. Under the condition of same dosage of slag, take 35% as an example, the slump of C2, D2, and E2 were reduced by 5.3%, 7.9%, and 8.4%, respectively, compared to B2.…”

Section: Advances In Materials Science and Engineeringsupporting

confidence: 88%

“…Consulting the literature [13][14][15][16], 10-60% of slag replace cement in concrete displays good performance, and the fineness of slag can also make a difference. In this study, the specimens of compressive strength and workability were concrete, and that of microstructure tests were corresponding paste.…”

Section: Experimental Designmentioning

confidence: 99%

“…Slump is always regarded as an indicator of the workability of concrete [14]. To explore the feasibility of UFSS replace cement in concrete, the slump was tested and is depicted in Figure 3.…”

Section: Workabilitymentioning

confidence: 99%

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Influences of Ultrafine Slag Slurry Prepared by Wet Ball Milling on the Properties of Concrete

Dai

et al. 2018

Advances in Materials Science and Engineering

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e application of ultrafine ground-granulated blast-furnace slag (GGBFS) in concrete becomes widely used for high performance and environmental sustainability. e form of ultrafine slag (UFS) used in concrete is powder for convenience of transport and store. Drying-grinding-drying processes are needed before the application for wet emission. is paper aims at exploring the performances of concrete blended with GGBFS in form of slurry. e ultrafine slag slurry (UFSS) was obtained by the process of grinding the original slag in a wet ball mill, which was mixed in concrete directly. e durations of grinding were 20 min, 40 min, and 60 min which were used to replace Portland cement with different percentages, namely, 20, 35, and 50, and were designed to compare cement with original slag concrete. e workability was investigated in terms of fluidity. Microstructure and pore structure were evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP). e fluidity of concrete mixed with UFSS is deteriorated slightly. e microstructure and early strength were obviously improved with the grind duration extended.

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Section: Advances In Materials Science and Engineeringsupporting

confidence: 88%

Section: Experimental Designmentioning

confidence: 99%

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Influences of Ultrafine Slag Slurry Prepared by Wet Ball Milling on the Properties of Concrete

Dai

et al. 2018

Advances in Materials Science and Engineering

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“…Geopolymers are inorganic by-product materials, rich in silicon (Si) and aluminium (Al) that react with alkaline activators to form three dimensional polymeric chains of sialate and poly(sialate) (Si-O-Al-O) [8][9][10][11]. Previous research indicates that the chemical reactions and strength development of geopolymer concrete are affected by number of parameters such as chemical activator composition and dosage, raw materials, and curing conditions [10,12].…”

Section: Introductionmentioning

confidence: 99%

Development of geopolymer mortar under ambient temperature for in situ applications

Al-Majidi

Λαμπρόπουλος

Cundy

et al. 2016

Construction and Building Materials

305

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Geopolymer concrete technology involves production of more environmentally friendly waste material-based concrete which could be a viable solution for conventional concrete replacement. Typical fly ash-based geopolymer concrete however requires high temperature curing treatment in order to develop sufficient early strength properties, which is considered a severe limitation for cast-in-place concrete applications. Most previous studies on geopolymer concrete have focused on the properties of concretes pre-hardened by heat curing and/ or by aggressive chemical treatment (e.g. alkali activation using concentrated sodium hydroxide (NaOH)). The current study presents an extensive experimental investigation on the mechanical and microstructural properties of geopolymer concrete mixes prepared with a combination of fly ash and slag cured under ambient temperature. 'User friendly' geopolymer mixes were produced using fly ash (FA) and Ground Granulated Blast furnace Slag (GGBS) mixed together with potassium silicate with molar ratio equal to 1.2 (as the activator) and water. The results indicated that heat curing treatment can be avoided by partial replacement of fly ash with slag. The compressive strength of the examined mixes was found to be in the range of 40-50MPa for 40 % and 50 % GGBS replacement mixtures respectively. Moreover, the flexural and direct tensile strengths of geopolymer mixes are considerably improved as the GGBS content is increased.Based on FTIR and SEM/EDS analysis, the inclusion of a higher content of GGBS resulted in a denser structure by formation of more hydration products.Keywords: Fly ash, slag, ambient temperature, user friendly geopolymer mortar *Manuscript Click here to view linked References 2 IntroductionThere are many environmental issues associated with the production of Ordinary Portland cement (OPC), such as consumption of 5% of natural resources, and generation of 5-7 % of total global anthropogenic carbon dioxide emissions [1][2][3][4]. This has led to an urgent need for the development of alternative materials that may provide technically viable alternative solutions to conventional cementitious concrete, with more favourable environmental credentials. Geopolymer concrete manufacture is one of the most promising techniques which has been developed in the last few years. Utilization of geopolymer materials can reduce 80% of greenhouse gas emissions associated with material production, and overcome issues related to cement production and unregulated disposal of industrial materials by recycling these materials in geopolymer manufacture [5][6][7].Geopolymers are inorganic by-product materials, rich in silicon (Si) and aluminium Five different mixtures of geopolymer mortar proportions were examined with various ratios of GGBS to total binder (10%, 20%, 30%, 40% and 50 %, Table 2). Based on preliminary experimental studies undertaken during the current project, the optimum mix design (in terms of mechanical strength and workability) was achieved using water, alkaline activator...

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“…He termed these binders as geopolymer [1]. The most common industrial by-products used as binder materials are fly ash (FA) and ground granulated blast furnace slag (GGBS) [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Geopolymer Concrete with Fly Ash and GGBS as Source Materials

Rajini¹,

Rao²

2014

IJIRSET

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ABSTRACT:The objective of this project is to study the effect of class fly ash (FA) and ground granulated blast furnace slag (GGBS) on the mechanical properties of geopolymer concrete (GPC) at different replacement levels (FA0-GGBS100, FA25-GGBS75, FA50-GGBS50; FA75-GGBS25, FA100, GGBS0). Sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH) solution have been used as alkaline activators. In the present investigation, it is proposed to study the mechanical properties viz. compressive strength, split tensile strength of low calcium fly ash and GGBS based geopolymer concrete. These properties have been determined at different curing periods like 7, 28, 56 and 90 days and at ambient room temperature.

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The effects of ground granulated blast-furnace slag blending with fly ash and activator content on the workability and strength properties of geopolymer concrete cured at ambient temperature

Cited by 719 publications

References 19 publications

Influences of Ultrafine Slag Slurry Prepared by Wet Ball Milling on the Properties of Concrete

Influences of Ultrafine Slag Slurry Prepared by Wet Ball Milling on the Properties of Concrete

Development of geopolymer mortar under ambient temperature for in situ applications

Mechanical Properties of Geopolymer Concrete with Fly Ash and GGBS as Source Materials

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