Long-term performance of concrete surface coatings in soil exposure of marine environments

Sadati, Seyedhamed; Arezoumandi, Mahdi; Shekarchi, Mohammad

doi:10.1016/j.conbuildmat.2015.07.094

Cited by 64 publications

(26 citation statements)

References 24 publications

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“…Consequently, the diffusion coefficients presented in Table 2 for HIDRO and SEAL have been obtained considering the w/c ratio of the REF alternative (current bridge design), namely w/c = 0.45. However, the durability performance of these treatments is very sensitive to ageing and weathering as derived from the existing literature [33,[35][36][37]. In particular, conventional treatments are very affected by microcracking of the concrete cover, for when those cracks are deeper than the treatment thickness, barrier properties are lost and the impregnation becomes ineffective [38,39].…”

Section: Durability Performance Of the Preventive Measuresmentioning

confidence: 99%

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

2018

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This paper applies Life Cycle Assessment methodology to aid in the decision making to select the preventive measure against chloride corrosion in concrete structures that works best for the socioeconomic context of the structure. The assumed model combines the concepts of Life Cycle Cost Analysis and Social Life Cycle Analysis to assess the impacts on users derived from the maintenance activities associated with each alternative analyzed in terms of economic costs. The model has been applied to a prestressed concrete bridge to obtain a preventive measure that can reduce the total costs incurred over the period of analysis by up to 58.5% compared to the cost of the current solution.

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Section: Durability Performance Of the Preventive Measuresmentioning

confidence: 99%

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

2018

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“…e reason was revealed that NS and silica fume not only consumed CH to form the dense C-S-H but also exerted the excellent filling effect, thereby declining the porosity, increasing density, improving the microstructure including interfacial transition zone (ITZ), and enhancing the mechanical performance [23][24][25][26]. Additionally, the inorganic materials generally performed better antiaging property and also showed excellent ability to augment the impermeability by coating on the surface [27,28].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanosilica on Impermeability of Cement‐Fly Ash System

Liu

Zhang

Tong

et al. 2020

Advances in Civil Engineering

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Surface protection has been accepted as an effective way to improve the durability of concrete. In this study, nanosilica (NS) was used to improve the impermeability of cement-fly ash system and this kind of material was expected to be applied as surface protection material (SPM) for concrete. Binders composed of 70% cement and 30% fly ash (FA) were designed and nanosilica (NS, 0–4% of the binder) was added. Pore structure of the paste samples was evaluated by MIP and the fractal dimension of the pore structure was also discussed. Hydrates were investigated by XRD, SEM, and TG; the microstructure of hydrates was analyzed with SEM-EDS. The results showed that in the C-FA-NS system, NS accelerated the whole hydration of the cement-FA system. Cement hydration was accelerated by adding NS, and probably, the pozzolanic reaction of FA was slightly hastened because NS not only consumed calcium hydroxide by the pozzolanic reaction to induce the cement hydration but also acted as nucleation seed to induce the formation of C-S-H gel. NS obviously refined the pore structure, increased the complexity of the pore structure, and improved the microstructure, thereby significantly improving the impermeability of the cement-FA system. This kind of materials would be expected to be used as SPM; the interface performance between SPM and matrix, such as shrinkage and bond strength, and how to cast it onto the surface of matrix should be carefully considered.

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“…The traditional anticorrosive coatings such as epoxy anticorrosive coatings, rubber anticorrosive coatings, and polyurethane anticorrosive coatings had large solvent pollution, short antiseptic life, and poor weather resistance. The modified coatings did not change the internal structure and could not have excellent properties [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Epoxy Resin’s Influence in Metakaolin-Based Geopolymer’s Antiseawater Corrosion Performance

Bian

Wang

Zhang

2019

International Journal of Corrosion

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To obtain the influence mechanism of epoxy resin content, curing time, and other external factors on the compressive strength and seawater corrosion resistance of geopolymer, the NaOH and Na2SiO3 were used as activators; the effect of epoxy resin concentration on the corrosion resistance of metakaolin-based geopolymer was investigated by experiments. The mechanism of epoxy resin concentration affecting the polymerization process and the properties of geopolymer was analyzed by X-ray diffraction, scanning electron microscopy-energy spectrum, and Fourier transform infrared spectroscopy. It was shown that the epoxy resin slowed down the polymerization. The presence of epoxy resin had a beneficial effect on compact structure. Furthermore, compared with the noncorrosive specimen, mixed with 30% specimen’s average compressive strength increased by 4.77MPa and 4.24MPa after curing for 1d and 3d and soaking for 56d.

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Long-term performance of concrete surface coatings in soil exposure of marine environments

Cited by 64 publications

References 24 publications

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

Life Cycle Cost Assessment of Preventive Strategies Applied to Prestressed Concrete Bridges Exposed to Chlorides

Effect of Nanosilica on Impermeability of Cement‐Fly Ash System

Epoxy Resin’s Influence in Metakaolin-Based Geopolymer’s Antiseawater Corrosion Performance

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