Accelerated test for assessing the potential risk of alkali-silica reaction in concrete using an autoclave

Cao, Jinsong; Gowripalan, Nadarajah; Sirivivatnanon, V.; South, W

doi:10.1016/j.conbuildmat.2020.121871

Cited by 10 publications

(3 citation statements)

References 23 publications

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“…Notably, the researchers also explored new ground by assessing GP's effectiveness when replacing up to 20% of traditional materials, discovering the formation of intricate calcium-silicate-hydrate (C-S-H) formations on the glass particles. This work aligns with the findings of Dobiszewska et al [32], solidifying a shared scientific perspective on the matter.…”

Section: Bibliographical Overviewsupporting

confidence: 90%

“…The advent of GP as an SCM is not merely a matter of waste utilization but also a way to avoid the well-documented drawbacks of using glass as an aggregate in concrete, primarily the risk of alkali-silica reactivity [29][30][31]. An unmanaged chemical reaction of this sort poses a severe risk to the stability of concrete structures [31][32][33]. Transforming waste glass into GP serves a dual purpose: it mitigates waste disposal concerns and resolves a critical engineering problem.…”

Section: Bibliographical Overviewmentioning

confidence: 99%

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Eco-Innovative UHPC—Enhancing Sustainability, Workability, and Ductility with Recycled Glass Cullet Powder and Plastic Bottle Hybrid Fibers

Khan,

Fares,

Abbas

et al. 2024

Materials

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Utilizing waste materials in producing ultra-high-performance concrete (UHPC) represents a highly effective approach to creating environmentally sustainable concrete using renewable resources. This study focused on incorporating ground glass cullet (GP) at various replacement levels in UHPC production. Additionally, plastic bottle fibers (PBFs) were derived from discarded plastic bottles and employed in the mix. The replacement levels for GP spanned from 0% to 40%. Single-use plastic bottles were transformed into strip fibers, both with and without the inclusion of microsteel fibers, at varying contents of 1.1% and 2.2% (volume-based). A single-fiber test was conducted on PBFs under different strain rates. The introduction of optimal GP content had a profound positive impact on compressive strength. Incorporating 2.2% plastic strips induced strain hardening behavior, while further inclusion of microsteel fibers resulted in substantial enhancements in mechanical properties. Two types of microsteel fibers were employed, characterized by different aspect ratios of 65 and 100. The optimum GP content was identified as 10%. Moreover, the UHPC mix achieved superior compressive strength, exceeding 140 MPa when composed of 1.3% (volume-based) microsteel fibers with an aspect ratio of 65 and 2.2% PBF (volume-based). Notably, mixtures featuring microsteel fibers with a higher aspect ratio demonstrated the highest flexural strength, exceeding 8000 N in the presence of 2.2% PBF. Longer microsteel fibers exhibited adequate slip properties, facilitating strain transfer and achieving a strain-hardening response in conjunction with plastic bottle fibers. These findings illuminate the potential for harnessing hazardous waste materials to improve the performance and sustainability of UHPC formulations.

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Section: Bibliographical Overviewsupporting

confidence: 90%

Section: Bibliographical Overviewmentioning

confidence: 99%

Eco-Innovative UHPC—Enhancing Sustainability, Workability, and Ductility with Recycled Glass Cullet Powder and Plastic Bottle Hybrid Fibers

Khan,

Fares,

Abbas

et al. 2024

Materials

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“…However, deleterious expansions associated with ASR have been recurrently reported among the main causes of deterioration of important concrete structures and infrastructures, such as dams, nuclear/power plant, pavements, bridges, walls, and barriers. This expansive deleterious reaction can gradually reduce the service life, the load-carrying capacity, and even the safety of the concrete structures, which can lead to high replacement costs or even the structure's demolition [46][47][48][49][50][51]. Due to the high cement content employed, the equivalent alkali content (Na2Oeq) in UH-PFRC mixtures usually exceeds 8 kg/m 3 .…”

Section: Research Significance and Objectivesmentioning

confidence: 99%

Susceptibility to Expansive Reactions of a Greener UHPC: Micro to Macro-Scale Study

Matos

2022

Applied Sciences

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Nowadays, in Europe, several infrastructures, such as bridges, viaducts, and maritime structures, are in an advanced state of degradation. Therefore, novel repair/rehabilitation techniques are sought. Recent advances in ultra-high-performance fibre-reinforced cement-based composites (UHPFRC) represent a significant step towards resilient structures. In addition to their remarkable mechanical properties (compressive strength > 150 MPa), they present extremely low permeability and, as a premise, very high durability. Despite their relatively high cost, UHPFRC can be a competitive solution for rehabilitation/strengthening applications where smaller volumes are needed. UHPFRC applied in thin layers (with or without reinforcement) can replace carbonated and/or cracked concrete acting as a protective watertight and/or strengthening layer. The structural capacity increases (stiffness, ultimate strength), and the durability is expected to improve significantly while keeping cross-sectional dimensions. Additional advantages are expected, such as reduced intervention time, fewer maintenance routines, reduced life-cycle cost, and longer service life. Although much of the focus on UHPFRC has centred on mechanical and/or structural performance, durability is inevitably linked with mechanical properties. The current work evaluated the durability of non-property and greener UHPC concerning expansive reactions, alkali-silica reactions and expansion due to external sulphates, by macro and micro-scale integrative study. Linear expansion tests were performed in UHPC specimens according to ASTM C 1260 and LNEC E−364. At the macro level, no deleterious expansion due to ASR or external sulphate occured. Expansion due to ASR was 0.0018% after 14 days of immersion in an alkali-rich environment, and no expansion was recorded regarding sulphate attack. However, SEM analysis reveals reactive products of ASR and sulphate attack, namely, ASR gel and ettringite, respectively, in UHPC specimens.

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Introduction to concrete and nanomaterials in concrete applications

Ćwirzeń¹

2021

Carbon Nanotubes and Carbon Nanofibers in Concrete-Advantages and Potential Risks

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Accelerated test for assessing the potential risk of alkali-silica reaction in concrete using an autoclave

Cited by 10 publications

References 23 publications

Eco-Innovative UHPC—Enhancing Sustainability, Workability, and Ductility with Recycled Glass Cullet Powder and Plastic Bottle Hybrid Fibers

Eco-Innovative UHPC—Enhancing Sustainability, Workability, and Ductility with Recycled Glass Cullet Powder and Plastic Bottle Hybrid Fibers

Susceptibility to Expansive Reactions of a Greener UHPC: Micro to Macro-Scale Study

Introduction to concrete and nanomaterials in concrete applications

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