The Effect of Temperature on Moisture Transport in Concrete

Wang, Yao; Xi, Yunping

doi:10.3390/ma10080926

Cited by 17 publications

(5 citation statements)

References 30 publications

(41 reference statements)

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“…The measurement of concrete resistivity is influenced by several parameters that can adversely affect the determination of the formation factor. The main such factors are water content and temperature; an increase in one of these two increases the ionic transport in the pore solution and decreases the resistivity of the concrete [291,[314][315][316]. The effect of temperature is even more complicated as it also affects the solubility of the hydrated phases in concrete, resulting in a change in pore solution composition [317].…”

Section: Relation To Concrete Durabilitymentioning

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

195

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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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Section: Relation To Concrete Durabilitymentioning

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

195

View full text Add to dashboard Cite

show abstract

“…The transport of moisture and chloride in concrete is usually described by the conventional Fick's first law, that is, the flux of moisture (J H ) is proportional to the moisture gradient or the gradient of pore relative humidity (H). 11 Similarly, the flux of chloride (J Cl ) is proportional to the concentration gradient of free chloride ions (C f ). 12 It is obvious that these two transportations are commonly considered as independent process with each other.…”

Section: For the T Wo-way Coupled Transportmentioning

confidence: 99%

Analytical solutions of moisture‐chloride ion coupled transport in unsaturated concrete

Wang

Bai

2021

J. Am. Ceram. Soc.

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Studies of chloride-induced corrosion in reinforced concrete structures are performed based on the reliable predictions of chloride and moisture distributions in concrete. This paper adopted the Laplace Transformation and the inverse Laplace Transformation to obtain the analytical solutions of the moisture-chloride two-way coupled transport processes. Additionally, the model has involved with realistic material parameters to predict the internal distributions of relative humidity and free chloride ions in concrete samples. To illustrate the accuracy of the present model, the calculations were compared with the available experimental results, and good agreements were obtained. It indicates that the present analytical model can successfully characterize the two-way coupling effects between chloride transport and moisture diffusion in concrete; and the model can provide the distribution profiles of both chloride and relative humidity in concrete, which are useful for predicting the service life of reinforced concrete structures.

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“…Various solar radiation models have also been developed in the field of meteorology 30 , 31 to consider solar radiation under different dates, times, and weather conditions. Moreover, the moisture and temperature of concrete are two mutually influential physical fields, and coupling analysis 32 – 34 provides a way to accurately determine the moisture and heat field inside concrete and has been an important research topic in the field of concrete temperature.…”

Section: Introductionmentioning

confidence: 99%

Analytical and experimental analysis of concrete temperature and energy considering open-air environmental variations

Yang,

Li,

Zhuo

et al. 2024

Sci Rep

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Longwave radiation is an important open-air environmental factor that can significantly affect the temperature of concrete, but it has often been ignored in the temperature analysis of open-air concrete structures. In this article, an improved analytical model of concrete temperature was proposed by considering solar radiation, thermal convection, thermal conduction and especially longwave radiation. Temperature monitoring of an open-air concrete block was carried out to verify the proposed model and analyze the heat energy characteristics of open-air concrete. As demonstrated by the open-air experiment, under the influence of longwave radiation, the temperature at the top of the concrete block could decrease rapidly at night and even become lower than the minimum temperature at its bottom. Compared with the analytical model that ignores longwave radiation, the improved model that includes it better matches the measured temperature. According to the energy analysis, although solar radiation controls the transient variation in heat energy, the heat exchange caused by longwave radiation were more than that caused by convection on sunlit surfaces, which indicates the importance of considering longwave radiation.

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The Effect of Temperature on Moisture Transport in Concrete

Cited by 17 publications

References 30 publications

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

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

Analytical solutions of moisture‐chloride ion coupled transport in unsaturated concrete

Analytical and experimental analysis of concrete temperature and energy considering open-air environmental variations

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