Properties evaluation of double silane system compound gel as a protective coating on concrete / Xu Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 1 (01/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 1 (01/2024) . - p. 329-340 Titre : Properties evaluation of double silane system compound gel as a protective coating on concrete Type de document : texte imprimé Auteurs : Xu Chen, Auteur ; Yan Gao, Auteur ; Youlai Zhang, Auteur ; Mengjun Hu, Auteur ; Yongjuan Geng, Auteur ; Shaochun Li, Auteur ; Shiyu Sui, Auteur ; Guozhu Liang, Auteur Année de publication : 2024 Article en page(s) : p. 329-340 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Colloides Durée de vie (Ingénierie) Enrobage (technologie) Hydrophobie Matériaux cimentaires -- Revêtements protecteurs Silanes Sol-gel, Procédé Index. décimale : 667.9 Revêtements et enduits Résumé : Inhibiting moisture transfer at the surface of concrete plays a vital role on the durability of concrete, and permeable protective coating can effectively resist the intrusion of external moisture into concrete. A double silane system compound gel was prepared through sol–gel synthesis method by using isobutyl triethoxy silane and tetraethyl orthosilicate, solving the problems of volatility and poor adhesion of traditional silane-based penetrating protective materials. The performance of the compound gel was verified through static contact angle, capillary water absorption of concrete with cracks, electrochemical accelerated ion penetration, and rapid carbonation tests. The test results showed that the capillary water absorption coefficient for concrete with cracks up to 0.5 mm and coating compound gel was reduced by more than 70% compared to blank; the corrosion time of inserted reinforcement in concrete treated with the compound gel was extended by more than two times compared to blank. The research of compound gel can expand the application market of silane-based protective materials, especially for some longitudinal concrete structural parts that need higher durability requirements. Note de contenu : - MATERIALS AND METHODS : Preparation of waterproof material - Test concrete substrate - Characterization of compound gel on concrete - Concrete durability test - RESULTS AND DISCUSSION : Bonding and hydrophobic properties of the synthesized compound gel on concrete - Analysis of electrochemical accelerated corrosion test results - Analysis of rapid carbonation test results - Analysis of waterproofing property of crack-damaged concrete test results - Table 1 : Raw materials and reagents for the preparation of compound gel - Table 2 : Physical and chemical properties of P·O 42.5 - Table 3 : Mixing ratios of concrete unit: kg·m-3 - Table. 4 : TCI for various types of coating - Table 5 : Capillary water absorption coefficient of concrete coated with various silane materials under various crack widths DOI : https://doi.org/10.1007/s11998-023-00824-0 En ligne : https://drive.google.com/file/d/1jn9PLI0Tpx_T0pyHXdU6hCYD06GRWTOU/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40456 [article]

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