Impact of climate change on the carbonation in concrete due to carbon dioxide ingress: Experimental investigation and modelling

AL-Ameeri, Abbas; Rafiq, MI; Τσιούλου, Ουρανία; Rybdylova, Oyuna

doi:10.1016/j.jobe.2021.102594

Cited by 26 publications

(15 citation statements)

References 18 publications

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“…CO 2 has been used for curing cement-based materials for several years [23,24]. As reported in prior research, CO 2 curing can improve the mechanical properties and the corrosion resistance of the reinforced cement matrix [25]. Additionally, CO 2 curing can effectively increase the mechanical strengths of reactive powder concrete by 30.1%-72.6%.…”

Section: Introductionmentioning

confidence: 80%

The Influence of CO2 Curing on the Mechanical Performance and the Corresponding Chloride Ion Resistance of Alkali-Activated Compound Mineral Admixtures

et al. 2022

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In this paper, the mechanical properties (the flexural strength, compressive strength and the drying shrinkage rate) of CO2-cured alkali-activated compound mineral admixtures (blast furnace slag powder (BFS) and fly ash (FA)) are investigated. In addition, the corresponding chloride ion mobility coefficient is measured. Additionally, the freeze–thaw cycles with an NaCl concentration of 3% is studied. Thermogravimetric analysis and scanning electron microscopy are applied in analyzing the mechanical properties. The curing ages of the alkali-activated compound mineral admixtures are 1 day, 3 days and 28 days. Results show that the mechanical strengths are decreased by the addition of FA and increased by the increasing curing age and CO2 curing. The maximum reducing rates of flexural and compressive strengths by FA are 47.6% and 42.3%. Meanwhile, the corresponding increasing rates by CO2 curing are 26.5% and 23.1%, respectively. The improving effect of alkali-activated BFS by CO2 curing is higher than that of FA. Furthermore, the drying shrinkage rate is increased by the increasing dosages of BFS, the increasing curing ages and CO2 curing. Additionally, CO2 curing and the increasing dosage of BFS leads to decreasing the chloride ion mobility coefficient. Finally, CO2 curing and the addition of BFS can effectively improve the resistance of NaCl freeze–thaw cycles. The compactness of the hydration products is improved by the addition of BFS and the roughness of hydration products is increased by CO2 curing.

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Section: Introductionmentioning

confidence: 80%

The Influence of CO2 Curing on the Mechanical Performance and the Corresponding Chloride Ion Resistance of Alkali-Activated Compound Mineral Admixtures

et al. 2022

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“…The three main precipitation centers are: The acidic gases in the atmosphere are mainly CO 2 , nitrogen oxide and sulfur oxide, among which CO 2 , SO 2 , and NO 2 can directly or indirectly affect the durability of concrete. Research shows that the carbonation rate in different areas under natural conditions will be affected by the concentration of CO 2 , 25 but the concrete structures investigated in this study are mostly located in urban areas with little difference in concentration CO 2 , so the concentration distribution of CO 2 will not be studied here. SO 2 and NO 2 are the main substances that form acid rain.…”

Section: Climatic Conditionsmentioning

confidence: 99%

Geographic division of exposure environment for concrete structure based on fuzzy clustering‐rough set information entropy

Luo

Dong

Niu

2022

Structural Concrete

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Deterioration of concrete structures is closely related to their service environment. Under different environmental conditions, the durability performance of structures will be different. To perform durability design based on local conditions and extend the service life of structures, it is necessary to divide their service environment based on the prevailing deterioration mechanism. In this study, considering Guangdong Province as an example, the environmental conditions affecting the durability of concrete structures are investigated and the geographical distribution of environmental conditions is analyzed, including ambient temperature, precipitation, corrosive gas, acid rain, and salt fog. The weights of the regional durability indexes are calculated by combining fuzzy clustering analysis with information entropy using rough set theory. Based on the assessment data of 1324 existing concrete structures, the durability geographic division map of Guangdong Province, including three regions (Chloride corrosion region, Acid rain‐carbonation coupling region, and Carbonation region), is constructed. This geographic division map is divided into a total of eight subregions by considering the subordinate factors in each region. The environmental characteristics of each region and its dominating deterioration mechanism for concrete structures are analyzed, and suggestions for durability design are provided.

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“…The premature deterioration of concrete structures creates economic, social, and environmental implications, with massive investments required for maintenance and repair when their durability is compromised [1][2][3][4][5][6]. For a concrete structure to be sustainable, it should emerge as a solution with minimal pollution and costs, whilst increasing comfort and safety throughout its designated service life [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene Oxide Nanomaterials on the Durability of Concrete: A Review on Mechanisms, Provisions, Challenges, and Future Prospects

Udumulla,

Ginigaddara,

Jayasinghe

et al. 2024

Materials

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This review focuses on recent advances in concrete durability using graphene oxide (GO) as a nanomaterial additive, with a goal to fill the gap between concrete technology, chemical interactions, and concrete durability, whilst providing insights for the adaptation of GO as an additive in concrete construction. An overview of concrete durability applications, key durability failure mechanisms of concrete, transportation mechanisms, chemical reactions involved in compromising durability, and the chemical alterations within a concrete system are discussed to understand how they impact the overall durability of concrete. The existing literature on the durability and chemical resistance of GO-reinforced concrete and mortar was reviewed and summarized. The impacts of nano-additives on the durability of concrete and its mechanisms are thoroughly discussed, particularly focusing on GO as the primary nanomaterial and its impact on durability. Finally, research gaps, future recommendations, and challenges related to the durability of mass-scale GO applications are presented.

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Impact of climate change on the carbonation in concrete due to carbon dioxide ingress: Experimental investigation and modelling

Cited by 26 publications

References 18 publications

The Influence of CO2 Curing on the Mechanical Performance and the Corresponding Chloride Ion Resistance of Alkali-Activated Compound Mineral Admixtures

The Influence of CO2 Curing on the Mechanical Performance and the Corresponding Chloride Ion Resistance of Alkali-Activated Compound Mineral Admixtures

Geographic division of exposure environment for concrete structure based on fuzzy clustering‐rough set information entropy

Effect of Graphene Oxide Nanomaterials on the Durability of Concrete: A Review on Mechanisms, Provisions, Challenges, and Future Prospects

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