Impact of different climates on the resistance of concrete to natural carbonation

Vu, Quoc Huy; Pham, Gabriel; Chonier, Alain; Brouard, Eric; Rathnarajan, Sundar; Pillai, Radhakrishna G.; Gettu, Ravindra; Santhanam, Manu; Aguayo, Federico; Folliard, Kevin J.; Thomas, M D; Moffat, Ted; Shi, Caijun; Sarnot, Anup

doi:10.1016/j.conbuildmat.2019.04.263

Cited by 40 publications

(14 citation statements)

References 25 publications

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“…The appropriate and purposeful usage of the concrete additives allows the engineers of concrete plants to modify fresh and solid concrete properties according to different aims of the construction industry. At the same time, it allows to realize the highly-qualified and durable concrete production in various climate conditions [8]. The most important quality of concrete construction will be its high quality and durability in future.…”

Section: Discussionmentioning

confidence: 99%

Influence of various additives on properties of concrete

Tuskaeva

Karyaev

2020

E3S Web Conf.

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A comparative analysis of concrete samples without chemical additives and three concrete samples with additives was carried out The first sample contains the liquid additive, the other two contain the powder additive. The article aims at finding out the effectiveness of additives influence on the physical and mechanical properties of concrete and the basis for the application areas of modified types of concrete. By means of laboratory tests, the physical and mechanical properties of concrete mixtures are determined. To determine the strength characteristics of concrete samples, the IM-1250M testing machine was used. The tests were carried out under the same temperature and humidity conditions. According to the results of the experiments, the samples with the multifunctional additive "D-5" showed the best characteristics of concrete, and the samples with the dolomite flour additive were the cheapest. As a result of the experimental analysis, the effects of three additives on the strength characteristics of concrete and water resistance were determined. Cemplast and D-5 additives are highly effective modifiers of concrete and mortar. They can increase the strength by 20-40% at the age of 28 days at dosages of 1.6-6% with a decrease in water-cement ratio and a decrease of cement amount by 20%. Additives highly increase the workability of the mixture, air entrainment and water resistance. While using the chemical additives an early set of the concrete design strength is observed for the construction time reducing in 7 days.

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Section: Discussionmentioning

confidence: 99%

Influence of various additives on properties of concrete

Tuskaeva

Karyaev

2020

E3S Web Conf.

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“…However, as the rate of CO 2 penetration is highest at low RH, it is often reported that the carbonation rate is highest in the 50-70% RH range [135,141]. Environmental exposure affects the rate of carbonation; for example, the more rainy days, the lower the carbonation rate [142]. This rate depends also on concrete porosity, and thus on the w/c ratio.…”

Section: Co 2 Penetration and Concrete Carbonationmentioning

confidence: 99%

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Rodrigues

Gaboreau

Gance

et al. 2021

Construction and Building Materials

202

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Steel corrosion is the main cause of deterioration of reinforced concrete (RC) structures. We provide an up-to-date review on corrosion mechanisms and recent advances in electrical methods for corrosion monitoring. When assessing corrosion mechanism, the inherent heterogeneity of RC structures and the significant effect of environmental factors remain major issues in data interpretations. The steel surface condition and local inhomogeneities at the steel-concrete interface appear to have an important effect on corrosion initiation. Considering uniform corrosion in atmospherically exposed reinforced concrete, the two main influencing factors of the corrosion process are the water content and the pore structure at the steel-concrete interface. However, irrespective of the depassivation mechanism, i.e. carbonation or chloride-induced corrosion, nonuniform corrosion is expected to be the main process for RC structures due to local variations in environmental exposure or the presence of interconnected rebars with different properties. Future studies may then be focused on their effect on macrocell corrosion to gain further insights in the corrosion mechanisms of RC structures. Concerning corrosion monitoring using electrical methods, the half-cell potential technique with potential mapping is accurate for locating areas with a high corrosion risk. Recent developments in the measurement of concrete resistivity have shown that the use of electrical resistivity tomography allows to consider appropriately the inherent heterogeneity of concrete and provides more insights on transport phenomena (e.g. water and salts ingress) in the material. Nevertheless, during the corrosion propagation stage, the polarization resistance remains the most important parameter to be determined as it provides quantitative information of the corrosion rate. If conventional three-electrode configuration methods can supply an accurate determination in the case of uniform corrosion, they often fail in the case of macrocell corrosion in field experiments. Recent advances have shown that a four-electrode configuration without any connection to the rebar can rather be used for the non-destructive testing and evaluation of corrosion. If studies are still required to quantify the corrosion rate, this method appears sensitive to localized corrosion and thus more suitable to field investigations. Finally, the coupling of numerical simulations with complementary electrical and other non-destructive testing methods is essential for consolidating the results to provide a better diagnosis of the service life of RC structures.

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“…Huy Vu et al [23] performed a unique international inter-laboratory study on the impact of different climates on resistance of concrete to natural carbonation. Concrete specimens were cast in France and shipped to four academic research laboratories in the USA, Canada, India and China to study the role of local climatic conditions on the progress of natural carbonation for five years.…”

Section: Natural Carbonation Resultsmentioning

confidence: 99%

Reinforced Concrete Durability Design Through a Semi-probabilistic Approach

Paulpandian

Neves

2023

Period. Polytech. Civil Eng.

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This study provides a semi-probabilistic approach to durability design of reinforced concrete structures, subjected to carbonation-induced corrosion. The method was developed from an existing approach and using comprehensive data collated from the literature. A statistical model for predicting accelerated carbonation coefficient, using as input variables mix proportions and test conditions was also generated. The performance of the proposed method was assessed and proved appropriate. Besides delivering a more consistent semi-probabilistic method to design for the avoidance of unforeseen carbonation-induced corrosion problems, the developed statistical model to estimate the accelerated carbonation coefficient is a useful tool on the mix design, from the standpoint of conforming with the accelerated carbonation coefficients obtained through the semi-probabilistic method.

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Impact of different climates on the resistance of concrete to natural carbonation

Cited by 40 publications

References 25 publications

Influence of various additives on properties of concrete

Influence of various additives on properties of concrete

Reinforced concrete structures: A review of corrosion mechanisms and advances in electrical methods for corrosion monitoring

Reinforced Concrete Durability Design Through a Semi-probabilistic Approach

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