Evaluation of the freeze-thaw durability of surface-treated airport pavement concrete under adverse conditions

Guo, Tianxiong; Weng, Xingzhong

doi:10.1016/j.conbuildmat.2019.02.085

Cited by 30 publications

(18 citation statements)

References 33 publications

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“…The silane has a potentially deeper penetration in the treated surface, with a higher reduction of the hydrophilicity and, thus, improved hydrophobic effectiveness. Furthermore, concerning the silane, it is generally assumed that the larger the molecule of the alkyl group linked to the silicon atom (which constitutes the structure of this compound), the higher the water repellency of the silane [8,45]. On the other hand, the long siloxane chains are more affected by environmental agents and weathering, undergoing degradation processes which can reduce their effectiveness as hydrophobic products [14].…”

Section: Discussionmentioning

confidence: 99%

Effect of Hygrothermal Aging on Hydrophobic Treatments Applied to Building Exterior Claddings

et al. 2020

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Hydrophobic materials are among the most commonly used coatings for building exterior cladding. In fact, these products are easily applied to an existing surface, significantly reduce water absorption and have a minimal impact on the aesthetic properties. On the other hand, although these products have a proven effectiveness, their long-term durability to weathering has not yet been systematically studied and completely understood. For these reasons, this study aims to correlate the effect of artificial aging on the moisture transport properties of hydrophobic treatments when applied on building exterior claddings. Three hydrophobic products (an SiO 2 -TiO 2 nanostructured dispersion; a silane/oligomeric siloxane; and a siloxane) were applied on samples of limestone and of a cement-based mortar. The moisture transport properties (water absorption, drying, water vapor permeability) of untreated and treated specimens were characterized. Furthermore, the long-term durability of the specimens was evaluated by artificial aging, that is, hygrothermal cycles (freeze-thaw and hot-cold). All treatments have significant hydrophobic effectiveness and improve the long term-durability of the treated specimens. However, the results showed that the three hydrophobic products have different effectiveness and durability, with the SiO 2 -TiO 2 nanostructured dispersion being the most durable treatment on limestone, and the siloxane the most suitable for cementitious mortar.

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Section: Discussionmentioning

confidence: 99%

Effect of Hygrothermal Aging on Hydrophobic Treatments Applied to Building Exterior Claddings

et al. 2020

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“…where R 2 is the coefficient for the fitted function. e influence of the strain and freeze-thaw damage variable on the concrete stress strength was captured by equation (4). Combining equation (2) and equation 4, the concrete stress about strain and the number of freezethaw cycles were obtained under uniaxial compression.…”

Section: Stress-strain Curved Surface Equation Of Concrete Aftermentioning

confidence: 99%

“…e stress surfaces are plotted in Figure 5. Figure 5(a) shows the curved surface drawn by fitting the data, and Figure 5(b) shows a curved surface drawn using the Wolfram Mathematica software based on equation (4). e unit of strain in the figures was microstrain (10 − 6 ), the freeze-thaw damage variable was a dimensionless quantity with values between 0 and 1, and the unit of stress was MPa.…”

Section: Stress-strain Curved Surface Equation Of Concrete Aftermentioning

confidence: 99%

“…e dimensions and units of the quantities in the above formula were the same as those in equation (4).…”

Section: Application For Stress-strain Curved Surface Equationmentioning

confidence: 99%

“…e proposed model was proven to be effective for evaluating the stressstrain relationship of fly ash concrete under freeze-thaw cycles. Guo and Weng [4] used relative dynamic elastic modulus tests and scanning electron microscopy (SEM) images to study the durability of airport pavement concrete, and their experimental results indicated that the freeze-thaw durability of the concrete coated with surface treatments improved compared with noncoated concrete, and the modified polyurea exhibited good freeze-thaw resistance. Tian et al [5] used computed tomography (CT) scans and SEM technology to study the erosion degradation behavior of concrete due to the combined influence of freeze-thaw cycles and sulfate solutions from a microscopic perspective.…”

Section: Introductionmentioning

confidence: 99%

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Equation for the Degradation of Uniaxial Compression Stress of Concrete due to Freeze-Thaw Damage

Yang

Wang

Gao

et al. 2019

Advances in Materials Science and Engineering

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To study the freeze-thaw damage characteristics of concrete, the uniaxial compressive tests of concrete under different number of freeze-thaw cycles were conducted, and the damage variable of freeze-thaw was obtained. The test results showed that the stress was a function of strain and freeze-thaw damage variable, and it can describe the degradation of concrete strength. Meanwhile, the equation for the stress-strain curved surface about strain and freeze-thaw damage variable was also proposed in this paper. The derivative function of the stress-strain curved surface equation with respect to strain presented the change of elastic modulus with the increase of freeze-thaw cycle number. Equation proposed in this paper can be used for predicting the concrete lifetime effectively in cold and large temperature difference regions.

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Improvement of Freeze‐Thaw Resistance of Concrete by Polyvinyl Alcohol Membrane and Silane

Kang,

Wu,

et al. 2023

Adv Eng Mater

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The surface protection can improve the waterproofness of concrete, thus reducing the saturation inside and improving the freeze‐thaw resistance (FT). Polyvinyl alcohol (PVA) membranes with different thicknesses and silane with varying impregnation depths are selected to improve the FT resistance of concrete as surface protection. The damage morphology, mass variation, ultrasonic pulse velocity, and mechanical characteristics of concrete after 125 FT times are analyzed according to the slow freezing method, and the damage mechanism is studied by scanning electron microscope in different depths of concrete. The results show that PVA membrane can improve the FT resistance of concrete and do better than silane because the silane can only keep dry inside the concrete but the surface still spalls off. And, the protection effect of PVA is a negative correlation with membrane thickness because the thicker the PVA membrane the better the air tightness and the membrane is easier damaged. On a microscopic level, the damage of PVA‐protected concrete is gradually weakened from the surface of concrete to inside, and there is an obvious boundary between the damaged and undamaged zone of silane‐protected concrete. This article provides a new idea for FT protection of concrete.

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Evaluation of the freeze-thaw durability of surface-treated airport pavement concrete under adverse conditions

Cited by 30 publications

References 33 publications

Effect of Hygrothermal Aging on Hydrophobic Treatments Applied to Building Exterior Claddings

Effect of Hygrothermal Aging on Hydrophobic Treatments Applied to Building Exterior Claddings

Equation for the Degradation of Uniaxial Compression Stress of Concrete due to Freeze-Thaw Damage

Improvement of Freeze‐Thaw Resistance of Concrete by Polyvinyl Alcohol Membrane and Silane

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