One-part alkali-activated materials: A review

Luukkonen, Tero; Abdollahnejad, Zahra; Kinnunen, Päivö; Illikainen, Mirja

doi:10.1016/j.cemconres.2017.10.001

Cited by 1,006 publications

(372 citation statements)

References 145 publications

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“…Therefore, alkali-activated materials with variable raw material availabilities, hydration reactions, costs, and CO 2 emissions due to production have been proposed as alternatives to OPC-based concretes, showing acceptable mechanical and durability properties as well as lower environmental impacts [2]. Alkali-activated materials are commonly comprised of aluminosilicate precursors (such as fly ash, volcanic ash, or metakaolin), alkali activators (such as sodium hydroxide and sodium silicate), and aggregates [3][4][5][6][7]. Although the use of alkali-activated materials has some environmental advantages, liquid alkali activators are corrosive, viscous, difficult to handle, and not user-friendly [4].…”

Section: Introductionmentioning

confidence: 99%

“…Alkali-activated materials are commonly comprised of aluminosilicate precursors (such as fly ash, volcanic ash, or metakaolin), alkali activators (such as sodium hydroxide and sodium silicate), and aggregates [3][4][5][6][7]. Although the use of alkali-activated materials has some environmental advantages, liquid alkali activators are corrosive, viscous, difficult to handle, and not user-friendly [4]. Thus, some researches have made efforts to replace aqueous alkali activators with solid activators [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Durability of the Reinforced One-Part Alkali-Activated Slag Mortars with Different Fibers

Abdollahnejad

Mastali

Falah

et al. 2020

Waste Biomass Valor

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This paper investigates the effects of reinforcing one-part alkali-activated slag binders (OAASs) with different types of fiber (steel, polyvinyl alcohol [PVA], basalt, and cellulose) and fiber combinations (single and hybrid) on the mechanical and durability properties of OAASs. All OAASs were reinforced by a 1% fiber volume fraction. Compressive and flexural strengths were the mechanical properties, which were addressed. The durability of the reinforced OAASs was examined based on water absorption by immersion and capillary, acid resistance, high temperature resistance, carbonation resistance, and freeze/thaw resistance. The experimental results showed that the fiber type and combination greatly affects the mechanical and durability properties of OAASs. Moreover, the influence of fiber type and combination on high temperature resistance and freeze/thaw resistance is greater than the influence on acid resistance and carbonation resistance. Graphic AbstractKeywords One-part alkali activated binders · Fiber reinforced mortars · Mechanical and durability properties · Fiber type · Fiber combination * Z. Abdollahnejad

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Durability of the Reinforced One-Part Alkali-Activated Slag Mortars with Different Fibers

Abdollahnejad

Mastali

Falah

et al. 2020

Waste Biomass Valor

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“…Although it has found wide use in recent years, it has not entered the regulations of most countries as a different design material from cement yet [6].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Thermal Conductivity of Aerogel-Incorporated Alkali-Activated Slag Mortars

Bostancı

Sola

2018

Advances in Civil Engineering

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Compressive strength, thermal conductivity coefficient, and porosimetric properties of alkali-activated slag (AAS) mortars containing silica aerogel were investigated experimentally in this study. For this purpose, slag mortar mixtures at 0.75% and 1.0% aerogel content ratios were prepared, and these mortar mixtures were activated with lithium carbonate (Li 2 CO 3 ) at 0.03% and 1.50% dosage rates. Mortar samples were exposed to curing process in water for 2, 7, and 28 days, and the samples, which completed the curing stage, were subjected to the compressive strength test. e porosimetry test and the thermal conductivity coefficient measurement were carried out following the compressive strength test on 28-day samples. e varying aerogel content rate in the mixtures and the effects of the dosage of Li 2 CO 3 on the gel, capillary, and macropore distributions, and the effect of changing porosimetric properties on compressive strength and thermal conductivity coefficient were analyzed in detail. Experimental studies have shown that AAS mortars including an optimum 0.75% aerogel content rate and 0.03% Li 2 CO 3 activation provided a compressive strength of 34.1 MPa and a thermal conductivity coefficient of 1.32 W/mK. Aerogel addition provides a partial compressive strength increase at 7-and 28-day samples while it also causes maximum strength loss of 5.0% at 2-day samples.

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“…In order to produce commercial available geopolymeric products, a new concept for geopolymer preparation, namely by one‐part geopolymer and addition of water to the geopolymeric precursors, has been proposed. The precursor is commonly prepared by mixing solid alkali‐activator with aluminosilicates with or without the calcination step …”

Section: Introductionmentioning

confidence: 99%

“…The precursor is commonly prepared by mixing solid alkaliactivator with aluminosilicates with or without the calcination step. [6][7][8][9][10] Vanadium tailing (VT) is the predominant solid waste in the vanadium extraction from the vanadium-bearing carbonaceous shale, and extracting 1 ton V 2 O 5 will generate about 120-150 tons VT. 11 The accumulated VT not only occupies a large amount of land, but also is a threat to the surrounding environment. Since the VT component is mainly composed of silica and alumina oxides, it is a potential raw material for the preparation of geopolymers.…”

Section: Introductionmentioning

confidence: 99%

Preparation of one‐part geopolymeric precursors using vanadium tailing by thermal activation

2019

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The main purpose of this study is to develop a user‐friendly one‐part geopolymer using vanadium tailing (VT). Geopolymeric precursor consists of activated VT and metakaolin that can react directly with water to form geopolymers. The roasting temperature plays an important role in the VT activation, which affects the compressive strength of the final geopolymer. The geopolymer with accepted compressive strength, that is 29.0 MPa after 7 days curing in ambient condition, can be prepared using VT after thermal activation at appropriate temperature (400‐600°C). As the roasting temperature is increased to 700°C, the VT is molten and sintered and the ability of providing alkaline and Si4+ is drastically weakened, which results in a poor compressive strength geopolymer.

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One-part alkali-activated materials: A review

Cited by 1,006 publications

References 145 publications

Durability of the Reinforced One-Part Alkali-Activated Slag Mortars with Different Fibers

Durability of the Reinforced One-Part Alkali-Activated Slag Mortars with Different Fibers

Mechanical Properties and Thermal Conductivity of Aerogel-Incorporated Alkali-Activated Slag Mortars

Preparation of one‐part geopolymeric precursors using vanadium tailing by thermal activation

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