Time dependence of carbonation resistance of concrete with organic film coatings

Li, Guo; Guo, Chenhao; Gao, Xin; Ji, Yongsheng; Ou, Geng

doi:10.1016/j.conbuildmat.2016.03.198

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…The carbonation depth reduced from 23 mm to 8 mm due to the inclusion of redispersible polymer powder in rice husk ash modified concrete. The higher carbonation resistance in the Rice Husk Polymer-modified Concrete (RHAPMC) is due to the presence of impermeable films; such findings are supported by researcher Li, G., et al [14] and by researcher Ohama [12,15].…”

Section: Carbonation Depthmentioning

confidence: 76%

Reducing the Effect of Carbonation and Corrosion in Rice Husk Ash Concrete by Incorporating Polymer

et al. 2019

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Durability plays a vital role in life of a reinforced concrete structural member. To increase service life of a structure, it is important to reduce corrosion potential and carbonation attack. In order to reduce the corrosion and carbonation effect in concrete structures, various supplementary cementing materials are used. In this study, a novel composite is introduced to reduce corrosion potential and carbonation attack on Rice Husk Ash Polymer Modified Concrete (RHAPMC). An experimental work was conducted to check the behaviour of corrosion and carbonation attack in control concrete, cement was replaced with RHAPMC concrete at the ages of 30 and 180 days. The results indicate that the effect of corrosion potential and carbonation has been significantly reduced with the addition of polymer in the cement replaced concrete.

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Section: Carbonation Depthmentioning

confidence: 76%

Reducing the Effect of Carbonation and Corrosion in Rice Husk Ash Concrete by Incorporating Polymer

et al. 2019

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“…Obviously, the addition of nano-TiO 2 improved the resistance of coated concrete against chloride attack. As shown in Figure 3, the Coulomb fluxes of the coated concrete specimens all increased gradually with ultraviolet irradiation and generally exhibited a sigmoid curve development mode [11]. This curve showed that the chloride resistance of coated concrete gradually decreased under ultraviolet aging.…”

Section: Coulomb Electric Flux Of Coated Concrete After Ultraviolet Imentioning

confidence: 85%

“…As the development of Coulomb fluxes of coated concrete with ultraviolet irradiation in Figure 3 is highly consistent with an S-shaped curve, a logistic growth model (Equation (1)) [11,31] for sigmoid curves can be used to make a nonlinear regression analysis, and the obtained equations of Coulomb fluxes of coated concrete with ultraviolet aging are listed in Table 1. Meanwhile, the fitting curves are shown in Figure 3 as dashed lines.…”

Section: Service Life Prediction For Coatings After Ultraviolet Irradmentioning

confidence: 87%

“…Theoretically, the time needed for coatings' complete aging is infinite, which is meaningless in engineering practice. In this paper, a value of 95% a is set as a criterion to forecast coatings' service lives [11,25]. Taking an average daily irradiance of 0.13 kw•h•m −2 in Jiangsu province, China as an example [32], the effective service lives of the CR, EP, PU, CRT, EPT, and PUT coatings adopted in this paper were 95.6, 74.9, 90.9, 277.4, 227.6, and 1494.5 days, respectively.…”

Section: Service Life Prediction For Coatings After Ultraviolet Irradmentioning

confidence: 99%

“…Using these coatings evidently improves the resistance of concrete against chloride ion penetration relative to common concrete surface treatments, such as hydrophobic impregnation or pore blocking [6,7]. However, polymer coatings often show poor resistance to aging [8][9][10][11]. Therefore, enhancing the long-term performance of organic polymer coatings has been an urgent task in concrete surface protective treatments.…”

Section: Introductionmentioning

confidence: 99%

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Improvements of Nano-TiO2 on the Long-Term Chloride Resistance of Concrete with Polymer Coatings

Cui

Zhou

et al. 2019

Coatings

Self Cite

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The long-term chloride resistance of concrete treated with nano-TiO2-modified polymer coatings was studied. Three types of organic film-forming paints: polyurethane, epoxy resin, and chlorinated rubber were selected, and concrete specimens with nano-TiO2-modified coatings were fabricated. Then, specimens were subjected to periodical ultraviolet-accelerated aging and subsequent Coulomb electric flux experiments. Nanomodified coatings before and after ultraviolet aging were observed through scanning electron microcopy. Results indicate that the nano-TiO2 particles can effectively reduce the microdefects in coating films and alleviate damages due to aging. As a result, nano-TiO2 can significantly reduce the Coulomb fluxes of coated concrete before and after coating aging, and the average reduction amplitudes reached 66% and 44%. That is, nano-TiO2 can remarkably improve the long-term chloride resistance of coated concrete. In addition, we established the development models of the ultraviolet aging and chloride resistance of coated concrete according to an S-shaped curve.

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Preparation of novel and durable concrete skin

Shi

2020

Structural Concrete

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The performance of the conventional concrete skin was promoted by ultrasonic surface treatment (UST) in this study, and the newly formed dense and hard concrete skin was termed as ultrasonic hardening layer (UHL). The microstructure of UHL was scanned and analyzed, several durability‐related indicators, such as water vapor penetration rate, surface, and interface hardness, were measured, and it was found that UHL could effectively improve the durability of concretes. The light reflectance of the UHL concrete surface was measured in the spectrum range of UV (200 nm) to NIR (2,500 nm), and it manifested 24.17% less mean reflectance than the conventional concrete skin. Therefore, UHL could serve as a promising road material due to its better melting capacity in cold‐temperate zones.

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Time dependence of carbonation resistance of concrete with organic film coatings

Cited by 28 publications

References 10 publications

Reducing the Effect of Carbonation and Corrosion in Rice Husk Ash Concrete by Incorporating Polymer

Reducing the Effect of Carbonation and Corrosion in Rice Husk Ash Concrete by Incorporating Polymer

Improvements of Nano-TiO2 on the Long-Term Chloride Resistance of Concrete with Polymer Coatings

Preparation of novel and durable concrete skin

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