Carbonation model for concretes with fly ash, slag, and limestone calcined clay - using accelerated and five - year natural exposure data

Rathnarajan, Sundar; Dhanya, B.; Pillai, Radhakrishna G.; Gettu, Ravindra; Santhanam, Manu

doi:10.1016/j.cemconcomp.2021.104329

Cited by 38 publications

(12 citation statements)

References 43 publications

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“…Recently, there has been a significant increase in research [263][264][265][266][267][268][269][270][271] focused on the potential utilization of CC as an SCM in the manufacturing of cement, with a particular emphasis on advancing its economic viability [272].…”

Section: Consideration Of CC As Scm: Replacement Of Portland Cement B...mentioning

confidence: 99%

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

Kaptan,

Cunha,

Aguiar

2024

Sustainability

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There is an increasing global recognition of the need for environmental sustainability in mitigating the adverse impacts of cement production. Despite the implementation of various carbon dioxide (CO2) mitigation strategies in the cement industry, such as waste heat recovery, the use of alternative raw materials and alternative fuels, energy efficiency improvements, and carbon capture and storage, overall emissions have still increased due to the higher production levels. The resolution of this matter can be efficiently achieved by the substitution of traditional materials with an alternative material, such as calcined clay (CC), construction and demolition waste (CDW), which have a significant impact on various areas of sustainable development, including environmental, economic, and social considerations. The primary objectives of employing CDW in the Portland cement production are twofold: firstly, to mitigate the release of CO2 into the atmosphere, as it is a significant contributor to environmental pollution and climate change; and secondly, to optimize the utilization of waste materials, thereby addressing the challenges associated with their disposal. The purpose of this work is to present a thorough examination of the existing body of literature pertaining to the partial replacement of traditional raw materials by CDW and the partial replacement of Portland cement by CDW and to analyze the resulting impact on CO2 emissions.

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Section: Consideration Of CC As Scm: Replacement Of Portland Cement B...mentioning

confidence: 99%

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

Kaptan,

Cunha,

Aguiar

2024

Sustainability

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“…This phenomenon results in heightened density and increased resilience against carbonation, bolstering the material's durability over time. The synergistic effect of enhanced surface area and the formation of C-S-H gel thus presents a multifaceted approach by which slag activity positively influences the carbonation resistance of blended cement [42]. The overarching effect on carbonation emanates from the confluence of these dual mechanisms.…”

Section: Carbonation Depthmentioning

confidence: 99%

Assessment of CO2 Capture in FA/GGBS-Blended Cement Systems: From Cement Paste to Commercial Products

Liu,

Wu,

et al. 2024

Buildings

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The cement industry’s intricate production process, including kiln heating and fossil fuel use, contributes 5–8% of global CO2 emissions, marking it as a significant carbon emitter in construction. This study focuses on quantifying CO2 capture potential in blended cement systems through the utilisation of phenolphthalein and thermalgravimetric methodologies. Its primary objective is to assess the CO2 absorption capacity of these blended systems’ pastes. Initial evaluation involves calculating the carbon capture capacity within the paste, subsequently extended to estimate CO2 content in the resultant concrete products. The findings indicate that incorporating ground granulated blast-furnace slag (GGBS) or an ettringite-based expansive agent did not notably elevate carbonation depth, irrespective of their fineness. Conversely, the introduction of fly ash (FA) notably augmented the carbonation depth, leading to a substantial 36.4% rise in captured CO2 content. The observed distinctions in carbonation behaviour primarily stem from variances in pore structure, attributable to distinct hydration characteristics between GGBS and FA. Thermal analysis confirms the increased stabilisation of CO2 in FA blends, highlighting the crucial influence of material composition on carbonation and emission reduction. Incorporating both GGBS and FA notably diminishes binder emissions, constituting almost half of PC-concrete emissions. Initially, 60% GGBS shows lower emissions than 50% FA, but when considering CO2 capture, this emission dynamic significantly changes, emphasising the intricate influence of additives on emission patterns. This underscores the complexity of evaluating carbonation-induced emissions in cementitious systems.

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“…Another mechanism that induces corrosion in PC-based material is carbonation [115,116]. Some studies [117,118] on the effect of 0.5%, 1.0%, and 5% of SiO 2 nanoparticles have shown that PC-based materials containing such nanomaterial presented more resistance against carbonation in accelerated tests.…”

Section: Reinforcing-steel Corrosionmentioning

confidence: 99%

Nanomaterial-Reinforced Portland-Cement-Based Materials: A Review

et al. 2023

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Portland cement (PC) is a material that is indispensable for satisfying recent urban requirements, which demands infrastructure with adequate mechanical and durable properties. In this context, building construction has employed nanomaterials (e.g., oxide metals, carbon, and industrial/agro-industrial waste) as partial replacements for PC to obtain construction materials with better performance than those manufactured using only PC. Therefore, in this study, the properties of fresh and hardened states of nanomaterial-reinforced PC-based materials are reviewed and analyzed in detail. The partial replacement of PC by nanomaterials increases their mechanical properties at early ages and significantly improves their durability against several adverse agents and conditions. Owing to the advantages of nanomaterials as a partial replacement for PC, studies on the mechanical and durability properties for a long-term period are highly necessary.

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Carbonation model for concretes with fly ash, slag, and limestone calcined clay - using accelerated and five - year natural exposure data

Cited by 38 publications

References 43 publications

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

A Review: Construction and Demolition Waste as a Novel Source for CO2 Reduction in Portland Cement Production for Concrete

Assessment of CO2 Capture in FA/GGBS-Blended Cement Systems: From Cement Paste to Commercial Products

Nanomaterial-Reinforced Portland-Cement-Based Materials: A Review

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