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

Yao, Hao; Xie, Zonglin; Huang, Chuhan; Yuan, Qiang; Yu, Zhiwu

doi:10.1016/j.conbuildmat.2021.124255

Cited by 52 publications

(15 citation statements)

References 85 publications

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“…55,56 The solubility product constants (K sp ) for calcium stearate and calcium laurate are 1 Â 10 À19.69 and 1 Â 10 À12. 16 , respectively. The disparity in the values of K sp indicates that the aqueous solubility of calcium laurate is higher compared to that of calcium stearate.…”

Section: The Application Of Stearic Acid Emulsions In Mortarmentioning

confidence: 97%

“…The structural integrity of the mortar is greatly diminished as a result of its high water absorption rate, leading to greater vulnerability to erosion by water and chloride ions during service. 2,16,54 The incorporation of stearic acid emulsion results in a notable decrease in water absorption, amounting to around 40%. The water absorption of LS05 is determined to be 2.00%, which corresponds to 49.24% of the water absorption seen in the blank mortar.…”

Section: The Application Of Stearic Acid Emulsions In Mortarmentioning

confidence: 99%

“…The internal mixing approach is achieved primarily by the incorporation of a hydrophobic ingredient into the formula for the mortar or concrete. 4,16 Silane oligomers and hydrophobic powders are common hydrophobic agents. The effect of silane oligomer on the hydrophobic modification of the structure of concrete is evident.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: The Application Of Stearic Acid Emulsions In Mortarmentioning

confidence: 97%

Section: The Application Of Stearic Acid Emulsions In Mortarmentioning

confidence: 99%

See 1 more Smart Citation

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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show abstract

“…Currently, there have been many reports on the hydrophobic modification of cementitious materials [ 3 , 4 ]. These reports explored the use of surface and integral hydrophobicity methods to improve the hydrophobicity of cementitious materials by incorporating hydrophobicity additives [ 5 , 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Perfluoropolyether-Silane@Ethye Cellulose Polymeric Microcapsules

Song,

Chen,

Huang

et al. 2024

Polymers

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A novel polymeric microcapsule was designed and synthesized using perfluoropolyether silane (PFPE-silane) as a superhydrophobic core material and ethyl cellulose (EC) as a shell material. The effects of the stirring rate and the core-to-shell ratio on the synthesized microcapsules were investigated. The physicochemical properties of the polymeric microcapsules were evaluated using scanning electron microscopy, fourier transform infrared spectroscopy, thermogravimetric analysis, laser particle size analysis, and wettability analysis. The results showed that when the stirring rate was 650 rpm and the core-to-shell ratio was 1:1, well-distributed and uniformly dispersed microcapsules could be obtained. The results also indicated that the prepared polymeric microcapsules were spherical particles with micropores on the surface, and they had an average particle size of 165.71 μm. The EC shells could effectively prevent the thermal decomposition of PFPE-silane during cement hydration, and the PFPE-silane also exhibited excellent hydrophobicity. The specially designed structure of this polymeric microcapsule suggests its potential for enhancing the corrosion resistance of reinforced concrete structures.

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“…Polydimethylsiloxane (PDMS) is a silicone polymer with superior chemical stability, water repellence and high adhesion. Cementitious materials containing PDMS have stable and durable hydrophobicity, strong corrosion resistance, as well as anti-icing and de-icing performance [26,[31][32][33]. The authors' previous studies [23,34] indicated the modification of MKG by PDMS to achieve low water absorption capability, strong hydrophobicity and uniform microstructure.…”

Section: Introductionmentioning

confidence: 99%

Early-age deformation of hydrophobized metakaolin-based geopolymers

Ruan

Chen

Liu

et al. 2023

Cement and Concrete Research

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

Cited by 52 publications

References 85 publications

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

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

Preparation and Characterization of Perfluoropolyether-Silane@Ethye Cellulose Polymeric Microcapsules

Early-age deformation of hydrophobized metakaolin-based geopolymers

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