Multi-crystallization enhancer for concrete waterproofing by pore blocking

Al-Rashed, Radi; Al-Jabari, Maher

doi:10.1016/j.conbuildmat.2020.121668

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…The addition of ACP enhanced water absorption reduction and electrical resistivity, attributed to decreased porosity and improved compaction, underscoring the effectiveness of ACP in enhancing hydrophobic concrete durability. Al-Rashed et al [115] study on multi-crystallization enhancer (MCE) for concrete waterproofing demonstrated substantial improvements in durability. At 28 days, MCE-dosed concrete showed diminutions in internal humidity of 21.9%, 16.7% and 12.5% at depths of 2, 3 and 4 inches, respectively.…”

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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“…For existing concrete structures, researchers have developed solutions such as different products, chemical bases and commercial systems to apply on concrete surfaces as waterproofing barrier systems. These products and systems include emulsions, acrylic membranes, asphalt blankets, polymeric mortars (2), liquid-applied films or sheets made of acrylic resins, bitumen, styrene-butadiene-styrene copolymer, ethylene propylene diene monomer (EPDM), acrylics, polyethylene; silane, siloxane (3) and silicone (4) and, more recently, crystallizing hydrophobic minerals (5), dual-crystallization (DCE) (6, 1) and multi-crystallization technology (7,8) with hygroscopic and hydrophilic characteristics. On the other hand, in new concrete structures, solutions involve a concrete mix design using supplementary cementitious materials such as metakaolin, silica fume, nano-silica, fly ash (9,10), nano metakaolin (11), rice husk ash and waste glass (12) or super absorbent polymers (SAPs) (13,14).…”

Section: Introductionmentioning

confidence: 99%

Influence of crystallizing type chemical admixture on precast micro concretes: a statistical analysis and holistic engineering overview

Lopes,

Bacarji,

Bacarji

et al. 2024

Mater. constr.

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The aim of this paper is to evaluate the influence of a crystallizing chemical admixture on precast micro concretes with two water contents (7% and 11%, by dried mass) and two different conditions of exposure. Thus, precast micro concretes with a composition of 1:3 (cement: fines) with and without crystalline chemical admixture were evaluated on compressive strength (at the age of 28 and 154 days) and water absorption by immersion (at the age of 154 days). Statistical analysis showed that the only significant factor was the effect of the water content on the compressive strength. Besides that, the most significant factors for the water absorption and voids index properties were the water content, followed by the exposure conditions, and the interaction between the water content and the presence of the chemical admixture. The crystalline admixture was insignificant in the conditions of this research.

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“…Because the external coating method is only applied on one side, it is required to make an advance prediction of the spots that are likely to have water leakage. 11,12 It places extremely rigorous requirements on architects and engineers of building safety systems. In the meantime, the internal mixing approach describes the process of incorporating a waterproofing agent into the formulation of concrete.…”

Section: Introductionmentioning

confidence: 99%

“…The formulation of the concrete does not need to be altered in any way for these procedures to be used, and existing building structures can be directly waterproofed using them. Because the external coating method is only applied on one side, it is required to make an advance prediction of the spots that are likely to have water leakage 11,12 . It places extremely rigorous requirements on architects and engineers of building safety systems.…”

Section: Introductionmentioning

confidence: 99%

A ultra‐low viscosity stearic acid emulsion prepared by lauric acid as waterproof agent for cement mortar

Huang,

Wu,

Wang

et al. 2023

J of Applied Polymer Sci

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Safe building structures cannot be achieved without reliable waterproofing engineering. To address the susceptibility of concrete materials to water leakage, a low‐viscosity stearic acid emulsion has been developed as a waterproofing agent for mortar. By introducing lauric acid, the formation of stearic acid crystals in water could be effectively prevented, resulting in a stearic acid emulsion with a viscosity of only 24 mPa·s. It is found that the best overall performance was achieved when the ratio (R) of lauric acid to stearic acid was 2/3. This emulsion has the least effect on mortar fluidity and setting time. The as‐prepared modified mortar possessed the highest compressive strength (127% of the blank) and the lowest water absorption at 48 h (37% of the blank). X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), energy‐dispersive x‐ray spectroscopy (EDS), scanning electron microscopy (SEM), dynamic light scattering (DLS) particle size analysis, and water contact angle measurements were used to investigate the mechanism of stearic acid emulsion's modification. It is determined that the stearic acid emulsions successfully modified the internal and external hydrophobicity of the mortar by chemical action with calcium hydroxide.

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Multi-crystallization enhancer for concrete waterproofing by pore blocking

Cited by 13 publications

References 24 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

Influence of crystallizing type chemical admixture on precast micro concretes: a statistical analysis and holistic engineering overview

A ultra‐low viscosity stearic acid emulsion prepared by lauric acid as waterproof agent for cement mortar

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