Coatings with embedded particles to increase interfacial anchorage of steel and GFRP rebars in concrete
by José De Jesús Pérez Bueno; Jorge Luis Soto Corral; José Luis Reyes Araiza; Maria Luisa Mendoza López; Alejandro Manzano-Ramírez
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 15, No. 3, 2021

Abstract: Three different types of coatings were studied for protecting rebars against corrosion: sol-gel silica, organic polymer (bisphenol A-fumarate), and organic-inorganic hybrid nanometric compound. This work proposes the addition of particles of about 5 mm in size, heterogeneously distributed, such as recycled glass or sand on the coatings to gain mechanical anchorage between the coated steel rebars and the concrete. This surface change was tested in rebars of fiber-reinforced polymer (GFRP) with fiberglass. The result was that this factor increased the force required for the extraction of the rebars. The low thickness of sol-gel SiO2 coatings made with TEOS was unsuitable for this application. The coatings with polymeric resin offered protection against corrosion in an economical and straightforward form. The organic-inorganic hybrid coatings, using silane coupling agents, provide coatings with adequate protection but depending on the preparation process and a cost increase regarding to the polymeric resin.

Online publication date: Fri, 15-Oct-2021

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