Super-hydrophobic magnesium oxychloride cement (MOC): from structural control to self-cleaning property evaluation

Zhengyao Qu, F. Wang (Corresponding author), Peng Liu, Q.L. (Qingliang) Yu (Corresponding author), H.J.H. (Jos) Brouwers

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)

Abstract

In this paper, magnesium oxychloride cement (MOC), which has a needle-like structure, is upgraded with super-hydrophobic surface using a facile method involving immersion in a FAS-ethanol solution. The influence of the molar ratios of the raw materials on the super-hydrophobic property was investigated. The phase compositions, microstructure, compressive strength, water resistance and wetting behaviour are studied in detail by X-Ray diffraction, scanning electron microscopy, a water contact angle measurement instrument, and mechanical testing. The water contact angle of as-prepared MOC reaches 152 ± 1° for the optimal mix design. The variation of the water contact angle of different mixes can be explained by the Cassie–Baxter model. The experiments using rolling off dust on the super hydrophobic surface present excellent self-cleaning ability. Moreover, proposed super hydrophobic surface exhibited excellent UV-durability, indicating a promising potential for the outdoor application.

Original languageEnglish
Article number30
Pages (from-to)30-39
Number of pages10
JournalMaterials and Structures
Volume53
Issue number2
DOIs
Publication statusPublished - 1 Apr 2020

Funding

The authors would like to acknowledge the financial support by STW-foundation (10979) and the EPSRC-NSFC Joint Research Project (No. 51461135005) for funding this research. Mrs. A.C.A. Delsing in the lab of Building Physics and Services at Eindhoven University of Technology is acknowledged for providing experimental support on the SEM analysis. Furthermore, the authors wish to express their gratitude to the following sponsors of the Building Materials research group at TU Eindhoven: Rijkswaterstaat Grote Projecten en Onderhoud; Graniet-Import Benelux; Kijlstra Betonmortel; Struyk Verwo; Attero; Enci; Rijkswaterstaat Zee en Delta-District Noord; Van Gansewinkel Minerals; BTE; V.d. Bosch Beton; Selor; GMB; Icopal; BN International; Eltomation;Knuaf Gips; Hess AAC Systems; Kronos; Joma; CRH Europe Sustainable Concrete Centre; Cement & Beton Centrum; Heros; Inashco; Keim; Sirius International; Boskalis; NNERGY; Millvision; Sappi and Studio Roex (in chronological order of joining). The authors would like to acknowledge the financial support by STW-foundation (10979) and the EPSRC-NSFC Joint Research Project (No. 51461135005) for funding this research. Mrs. A.C.A. Delsing in the lab of Building Physics and Services at Eindhoven University of Technology is acknowledged for providing experimental support on the SEM analysis. Furthermore, the authors wish to express their gratitude to the following sponsors of the Building Materials research group at TU Eindhoven: Rijkswaterstaat Grote Projecten en Onderhoud; Graniet-Import Benelux; Kijlstra Betonmortel; Struyk Verwo; Attero; Enci; Rijkswaterstaat Zee en Delta-District Noord; Van Gansewinkel Minerals; BTE; V.d. Bosch Beton; Selor; GMB; Icopal; BN International; Eltomation;Knuaf Gips; Hess AAC Systems; Kronos; Joma; CRH Europe Sustainable Concrete Centre; Cement & Beton Centrum; Heros; Inashco; Keim; Sirius International; Boskalis; NNERGY; Millvision; Sappi and Studio Roex (in chronological order of joining). This study was funded by STW-foundation (10979) and the EPSRC-NSFC Joint Research Project (No. 51461135005).

FundersFunder number
CRH Europe Sustainable Concrete Centre
Cement & Beton Centrum
EPSRC-NSFC51461135005
Ministerie van Infrastructuur en Waterstaat
Ministerie van Infrastructuur en Waterstaat
STW-foundation10979

    Keywords

    • Magnesium oxychloride cement
    • Self-cleaning
    • Super hydrophobic
    • UV-durable
    • Water-resistance

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