Open AccessInvestigation of Silane Impregnation for Protection of Alkali-Activated Slag Mortar
Author(s) -
Jin Li,
Peiyuan Chen,
Haibing Cai,
Ying Xu,
Murodjon Rasulov
Publication year - 2021
Publication title -
advances in materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 42
eISSN - 1687-8442
pISSN - 1687-8434
DOI - 10.1155/2021/9970753
Subject(s) - silane , materials science , contact angle , coating , scanning electron microscope , mortar , fourier transform infrared spectroscopy , composite material , penetration (warfare) , absorption of water , infrared spectroscopy , chemical engineering , organic chemistry , chemistry , operations research , engineering
This paper investigated the effects of silane impregnation on the protective properties of alkali-activated slag (AAS) mortars. The surface silane impregnation on water absorption, contact angle, and penetration depth were examined. The related protective mechanism regarding silane impregnation was analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier infrared spectroscopy (FT-IR). The results showed that the surface of the AAS mortar after silane impregnation was transformed from hydrophilic to hydrophobic with an increased contact angle of 80° from 36° to 116°. And the water absorption was significantly decreased by 74.42% to 97.79%. The penetration depth of the two-layer coating was dramatically higher than that of the one-layer coating. The optimal coating method and dosage of silane were two-layer coating and 200 g/m2. In addition, silane impregnation formed a stable Si-O bond with AAS mortars through a hydrolytic condensation reaction and the −CH2CH3 group of the silane acted on the surface of the AAS mortars.
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