Influence of different additives on the properties of sodium sulfate activated slag

Rashad, Alaa M.

doi:10.1016/j.conbuildmat.2015.01.022

Cited by 85 publications

(18 citation statements)

References 50 publications

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“…These results indicate that the compressive strength does not increase linearly with increasing MS contents. The highest values of compressive strength increased with the age, for all the MS contents, as expected [3,5,18].…”

Section: Methodssupporting

confidence: 74%

“…In general, it has been reported that the use of a mixture of sodium silicate and hydroxide-based activation can achieve high compressive strength. In other studies where 1% Na 2 O equivalent of Na 2 SO 4 was used, an increased strength with age was also reported [18]. In an AASC study in which gypsum was used at 2% and 4% by slag mass [19], the compressive strength increased with the amount of gypsum.…”

Section: Compressive Strengthmentioning

confidence: 78%

“…Meanwhile, degradation studies by sulfate immersion experiments have also been conducted on AASC [9,14], but some sulfates have also been used as activators in AASC. Sodium sulfate (Na 2 SO 4 ) [15][16][17][18] or gypsum (CaSO 4 •2H 2 O) [19,20] was used as an activator in the AASC study using sulfate.…”

Section: Introductionmentioning

confidence: 99%

“…Mobasher et al [17] studied composites of Ba(OH) 2 , Na 2 SO 4 and blast-furnace slag (BFS) for immobilising sulfate-bearing nuclear waste. Rashad [18] reported the effect of five additives (silica fume, fly ash, limestone, hydrated lime and Portland cement) on the workability, compressive strength and drying shrinkage of 1% Na 2 O equivalent of Na 2 SO 4 activated slag. Chang et al [19] studied how gypsum (CaSO 4 •2H 2 O) and phosphoric acid affect the properties of sodium-silicate-based alkali-activated slag (AAS) paste.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Effects of Magnesium-Sulfate as Slag Activator

Kang

Kim

2020

Materials

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This study is about the mechanical and microstructural properties of alkali-activated slag (AAS) paste using magnesium sulfate (MS) as an activator. MS is 2%, 4%, 6%, 8% and 10% contents of binder weight and water-binder ratio is 0.35. Compressive strength, X-ray diffraction, mercury-intrusion porosimetry, and thermal analysis were performed for analysis. The MS contents at which the maximum compressive strength appeared varied according to the measurement age. Hydration products affecting compressive strength and pore structure were ettringite and gypsum. As a result, the changes of ettringite and gypsum depending on the contents of MS have a great influence on the pore structure, which causes the change of compressive strength. The high MS contents increases the amount of gypsum in the hydration products, and the excess gypsum causes high expansion, which increases the diameter and amount of pores, thereby reducing the compressive strength.

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Section: Methodssupporting

confidence: 74%

Section: Compressive Strengthmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the Effects of Magnesium-Sulfate as Slag Activator

Kang

Kim

2020

Materials

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“…This is represented in Table 4 with the strength of the carbonate mortar being expressed as a percentage of the control mortar at the same age. The strength enhancement is higher than that observed by Rashad (2015) in sodium sulfate-activated slag in which 5% limestone dust was used as a replacement for the slag. In contrast, the inclusion of recycled glass cullet produces similar results to mixes without a supplementary aggregate.…”

Section: Discussionmentioning

confidence: 55%

Use of supplementary aggregates in mortars produced using a novel lime-drying technique

Starinieri

Illingworth

Hughes

2019

Proceedings of the Institution of Civil Engineers - Constructio

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Formulated Lime mortars suitable for long-term storage in silos or bags can be produced by adding quicklime to wet, as-received quarried sand. However, sands with high water content may require the addition of so much quicklime that would alter the mortar 2 proportioning. This work investigates the possibility to replace part of the lime-dried sand with dry crushed mixed glass cullet and calcium carbonate aggregate to allow greater control over mortar formulations. It is shown that the use of glass yields a similar or slightly weaker product, depending upon curing regime, than the control whilst calcium carbonate generates the strongest mortar.

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Silica Fume as a Part of Precursor/An Additive

Rashad

2023

SpringerBriefs in Applied Sciences and Technology

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Influence of different additives on the properties of sodium sulfate activated slag

Cited by 85 publications

References 50 publications

Investigation of the Effects of Magnesium-Sulfate as Slag Activator

Investigation of the Effects of Magnesium-Sulfate as Slag Activator

Use of supplementary aggregates in mortars produced using a novel lime-drying technique

Silica Fume as a Part of Precursor/An Additive

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