Using lithium nitrate and pozzolanic glass powder in concrete as ASR suppressors

Taha, Bashar; Nounu, Ghassan

doi:10.1016/j.cemconcomp.2007.08.010

Cited by 92 publications

(34 citation statements)

References 4 publications

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“…It can be expected that for higher cement replacements greater expansion reduction will be obtained as stated by 39 . Hence ASR testing results confirmed that glass powder assisted in hindering expansion compared to control mortar, confirming assumptions by other authors 16,17,40 . For Slump-flow, values ranging from 500 to 700 mm have been suggested for self-compacting concrete 23 .…”

Section: Discussionsupporting

confidence: 79%

“…A similar trend was observed for the modulus of elasticity; in this case influence of glass powder was not so pronounced. Differences between strength of both mixes resulted from the pozzolanic nature of glass powder and its behaviour with time and also by the fact that fineness of glass powder enhances pozzolanic properties and particle packing density 40 . As glass powder is a amorphous pozzolanic material, when it is used in concrete as cement replacement, it can contribute to the formation of hydration products and C-S-H gel.…”

Section: Discussionmentioning

confidence: 99%

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Durability Enhancement Of SCC With Waste Glass Powder

et al. 2016

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Self compacting concrete (SCC) requires a large quantity of fine materials compared to common concrete. In this work waste glass powder was used to replace (50%) of filler required. Two types of SCC were manufactured, a control SCC type (CTL) using cement and limestone filler and another with glass powder replacing 50% of the filler. Mechanical and durability properties, namely, compressive strength, resistivity, chloride ion penetration, carbonation, capillary water absorption and oxygen permeability were assessed on both SCC types. It could be concluded that waste glass powder can be used successfully in SCC improving chloride penetration and water absorption by capillarity and maintaining strength levels. The potential risk of alkali-silica observed on mortar was mitigated when incorporating glass powder.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Durability Enhancement Of SCC With Waste Glass Powder

et al. 2016

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“…This method has been used previously to examine the capability of powdered glass to control ASR in concrete containing glass sand as the reactive aggregate (Taha and Nounu, 2008). However, the 78-week testing period adopted could potentially have missed later-age expansion.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of powdered glass cullet as a means of controlling harmful alkali–silica reaction

Dyer¹,

Dhir²

2010

Magazine of Concrete Research

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It has been proposed that glass derived from container glass recovery can act to control harmful alkali-silica reaction in concrete when included in powdered form. However, the high sodium content of the material raises concerns about whether the release of this element could ultimately exacerbate the reaction. This paper reports on a study carried out on concrete mixes containing aggregate combinations known to undergo harmful alkali-silica reaction in combination with powdered glass, to establish its efficacy at controlling alkali-silica reaction. Glass suppressed expansion for a finite period of time, before expansion reached levels similar to or greater than the controls. It is therefore concluded that the use of powdered container glass is not suitable for controlling alkalisilica reaction. However, it is proposed that the sodium contribution from container glass is, in many cases, irrelevant, since the alkali contributions from the reactive aggregate combinations themselves appear to outweigh those from the glass.

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“…The mechanisms by which the lithium salts reduce ASR expansion are still unclear. However, some researchers [12,11,34,42] have proposed that lithium may either reduce silica dissolution, or it may decrease the repolymerization of silica and silicates. When lithium compounds are used to suppress the ASR-induced expansion of a reactive aggregate, the structure of the silica governs the rate and/or amount of silica dissolution in the ASR reaction [12].…”

Section: Introductionmentioning

confidence: 99%