ASR expansions at the level of a single glass-cement paste interface: experimental results and proposal of a reaction-expansion mechanism

Liaudat, Joaquín; Carol, Ignacio; López, Carlos M.; Leemann, Andreas

doi:10.1016/j.conbuildmat.2019.05.106

Cited by 12 publications

(4 citation statements)

References 29 publications

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“…Other experimental works found that the Ca/Si ratio of the ASR gel in the glass cracks is much lower than that at the glass paste interface (Rajabipour et al 2010;Shim 2019;Liaudat et al 2019). This is because of calcium ions originating from the paste neighboring the glass particles.…”

Section: Introductionmentioning

confidence: 91%

A Novel Method of Crushing Glass Aggregates to Reduce the Alkali-Silica Reaction

et al. 2021

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This study proposed a novel method of crushing glass aggregates to reduce the alkali-silica reaction (ASR). Glass aggregates were crushed while immersed in different calcium bearing solutions. ASR measurement and compressive strength tests of mortars incorporating the glass aggregate were performed to investigate the feasibility of the crushing method. The results indicate that the crushing method was effective in both ASR mitigation and compressive strength improvement. Calcium nitrite solution was found to be more effective than calcium chloride solution for mitigating ASR damage. The ASR expansion after 14 days, measured in accordance with ASTM C1260, was 0.228% when the glass aggregates were conventionally crushed in air, which is potentially unsafe. This value decreased to 0.082% when the aggregates were crushed in calcium nitrite solution, a value which is considered innocuous. The compressive strength of the mortar was enhanced by approximately 12% compared to that of a mortar with conventionally crushed glass aggregate by incorporating glass aggregates crushed in calcium nitrite solution.

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Section: Introductionmentioning

confidence: 91%

A Novel Method of Crushing Glass Aggregates to Reduce the Alkali-Silica Reaction

et al. 2021

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“…Some of the more recent methods and tests [29][30][31][32][33] were further reviewed in a study by Figuera et al [3], in which they stated that ASR and its treatment are influenced by more factors that are still unfound in literature. Their study concludes that while massive efforts have been devoted to manipulating ASR, the ability to understand it entirely remains lacking.…”

Section: Introductionmentioning

confidence: 99%

Expansion and Mitigation of Alkali-Silica Reaction in Binary Blended Concrete Confining Potentially Reactive Aggregates

Lacsado,

Velasco III,

Juan

2023

KEM

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Without a cure but preventable, Alkali-Silica Reaction (ASR), dubbed the “Concrete Cancer,” happens when alkali in cement bonds with silica in aggregates to form an expansive gel. This research aims to investigate expansion and influence mitigation of ASR in concrete by identifying potentially reactive aggregates causing its onset and using binary blended cement to slow down unwanted gel expansions through the mitigative ability found in its fly ash component. This research also observed variations in expansive behavior and the physical changes that arose after the experiments. Aggregate samples were collected from different quarries in Davao, Philippines, denoted as Deposit A, Deposit B, Deposit C, and Deposit D. These deposits were tested according to the ASTM C1260: Accelerated Mortar Bar Tests (AMBT) to identify a reactive group. Three aggregate groups, Deposit A, Deposit B, and Deposit C, were tagged as reactive due to exhibiting more than a 0.1% increase in lengths, indicating unideal expansion. Additional sets of AMBTs were done for the identified aggregates using blended cement as a binder to test the combinations' ability to minimize expansion. This resulted in an average expansion decrease per set of approximately 78%, 82%, and 85% for A, B, and C, respectively, further strengthening the reputation of fly ash as an effective mitigating SCM against ASR.

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“…When the glass is used in concrete with particle sizes greater than 0.5 mm, the development of the AAR is observed. However, when ground in dimensions smaller than 100 µm, it can present a pozzolanic behavior and reduce the expansion potential of the ASR [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of granitic rock fines addition in the alkali-aggregate reaction (AAR) in cementitious materials

Santos

Ribeiro

2021

Rev. IBRACON Estrut. Mater.

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According to previous studies, fine materials originated from reactive aggregates can act as a Alkali-Aggregate Reaction mitigator, having its effectiveness dependent on their reactivity, fineness and added content. Thus, the present work aims to study if reactive granitic rock fines can mitigate or reduce the AAR and how the fineness of the material influences its mitigation capacity. For this purpose, granitic rock fines (GRF) from 2 different deposits and Pyrex glass fines (PGF) were tested as concrete addition. Each one of these fines were used in two different finesses and added to the concrete in the contents of 20% by mass of cement. It was observed that the addition of GRF did not affect the physical-mechanical properties of concrete and allowed the reduction in the AAR, being more accentuated with the increase of its specific surface.

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ASR expansions at the level of a single glass-cement paste interface: experimental results and proposal of a reaction-expansion mechanism

Cited by 12 publications

References 29 publications

A Novel Method of Crushing Glass Aggregates to Reduce the Alkali-Silica Reaction

A Novel Method of Crushing Glass Aggregates to Reduce the Alkali-Silica Reaction

Expansion and Mitigation of Alkali-Silica Reaction in Binary Blended Concrete Confining Potentially Reactive Aggregates

Influence of granitic rock fines addition in the alkali-aggregate reaction (AAR) in cementitious materials

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