Influence of drying on frost resistance of mortar using a nitrite corrosion inhibitor and paraffin waterproofing agent

Honda, Daiki; Quy, Nguyen Xuan; Kim, Jihoon; Hama, Yukio

doi:10.1016/j.conbuildmat.2021.122581

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…Sulfate penetration depths ranged from 0-22 mm, highlighting the enhanced durability of hydrophobic concrete in combating sulfate attacks, which is crucial for ensuring long-term structural resilience. In a study by Honda et al [116], the frost resistance of hydrophobic concrete incorporates a paraffin waterproofing agent (PWA) and a nitrite corrosion inhibitor (NCI). With a water-to-cement ratio (W/C) of 35%, the frost resistance exhibited improvement with the increasing presence of NP, demonstrating weight loss similar to MN during water curing.…”

Section: Impact On Durability Of Bmhcmentioning

confidence: 99%

A comprehensive review of hydrophobic concrete: surface and bulk modifications for enhancing corrosion resistance

Gnanaraj S,

2024

Eng. Res. Express

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Corrosion in concrete structures constitutes significant challenges, threatening integrity and requiring high maintenance costs. Hydrophobic concrete presents an emerging solution for addressing corrosion in concrete structures, especially in marine environments. This review article investigates advanced techniques for surface and bulk modifications of hydrophobic concrete, focusing on their efficacy in enhancing corrosion resistance. Surface modifications using silane-siloxane coatings and polyurethane treatments significantly reduce water absorption by up to 30% and chloride ion permeability by up to 50%. Bulk modifications incorporating nano-silica and calcium stearate demonstrate marked improvements in mechanical properties and corrosion resistance, with calcium stearate reducing corrosion rates by 40%. These treatments also contribute to an average increase in compressive strength of 15% and a decrease in corrosion current densities, indicating practical utility in environments such as marine conditions. Additionally, innovative techniques like fluorosilane treatments and steel fibres further fortify impermeability and structural integrity, demonstrating the versatility of hydrophobic concrete in addressing corrosion challenges. Moreover, using eco-friendly ingredients underscores its potential for sustainable infrastructure development. In summary, hydrophobic concrete offers a comprehensive strategy for combating corrosion, providing surface and bulk modifications that enhance durability, reduce maintenance costs, and ensure the long-term sustainability of modern infrastructure.

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Section: Impact On Durability Of Bmhcmentioning

confidence: 99%

A comprehensive review of hydrophobic concrete: surface and bulk modifications for enhancing corrosion resistance

Gnanaraj S,

2024

Eng. Res. Express

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“…However, they also reported that the penetration space of water reaching the oil droplets is only the volume change with the decreasing temperature, and that alone cannot relieve pressure via the 9% volume expansion due to the water freezing. By considering that the oil droplets have the same viscosity as water and are movable, Honda et al [12] proposed a hypothesis that the hydrophobic compound existing as oil droplets in the HCP will be pushed out of space by the water pressure, as shown in Fig. 3.…”

Section: Paraffin 0%mentioning

confidence: 99%

“…The addition of a hydrophobic compound has been reported as an effective method for improving the frost resistance of concrete. Honda et al [12] reported that the addition of paraffin as a hydrophobic compound to mortar would improve its resistance to frost damage. Kishimoto et al [13,14] suggested that the addition of an appropriate amount of silicone oil also improved frost resistance.…”

Section: Introductionmentioning

confidence: 99%

Visualization of Hydrophobic Compound Distribution in Hardened Cement Paste Using X-Ray Ct

Fukuda¹

2023

GEOMATE

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Although hydrophobic compounds have been reported as an effective method for improving frost resistance of concrete, little research has been undertaken to investigate the behavior of hydrophobic compounds in hardened cement paste (HCP). Moreover, by using the existing cross-sectional observation approach to investigate the air void system in HCP, it is unclear how oil droplets exist in the HCP, and distinguishing between air bubbles and droplets becomes difficult. In this study, silicone oil and paraffin were used as the hydrophobic compounds. The behavior of silicone oil and paraffin in the HCP was investigated using X-ray computer tomography (CT) as a non-destructive method to elucidate the mechanism of suppressing frost damage. The findings demonstrated that it is clearly possible to distinguish between oil droplets and air bubbles in the HCP containing silicone oil. Furthermore, we could also observe how oil droplets disappeared and changed into voids during the hardening process. In contrast, the HCP containing a paraffin admixture was unable to distinguish between air bubbles and paraffin.

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Recent progress of hydrophobic cement-based materials: Preparation, characterization and properties

Yao

Xie

Huang

et al. 2021

Construction and Building Materials

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Influence of drying on frost resistance of mortar using a nitrite corrosion inhibitor and paraffin waterproofing agent

Cited by 9 publications

References 26 publications

A comprehensive review of hydrophobic concrete: surface and bulk modifications for enhancing corrosion resistance

A comprehensive review of hydrophobic concrete: surface and bulk modifications for enhancing corrosion resistance

Visualization of Hydrophobic Compound Distribution in Hardened Cement Paste Using X-Ray Ct

Recent progress of hydrophobic cement-based materials: Preparation, characterization and properties

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