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1. Mar 2021 | Application Areas

Properties of modified epoxy resin coated OPC concrete

In a new study, a novel TiO2-graphene modified epoxy resin employed as coatings for ordinary Portland cement (OPC) concrete was fabricated with three different dosages.
The cost-effective fabrication method creates opportunities for epoxy resin being utilised as surface coatings for cementitious binders. 
Image source: Free-Photos - Pixabay (symbol image).

It was found that the TiO2-graphene could be dispersed homogeneously in the epoxy resin matrix without reducing interfacial bonding strengths between coatings and OPC concrete substrates.

Moreover, with the aid of certain dosages of TiO2-graphene nanofiller (0.3 % and 0.5 %), both the impermeability towards water and chloride of the OPC concrete reflected by capillary sorptivity and chloride penetration respectively was greatly improved compared to the pure epoxy resin coated concrete or concrete substrate without coatings.

0.5 % dosage achieved the best coating performance

In contrast, 1.0 % dosage led to higher water and chloride permeability than the concrete coated by pure epoxy resin coating. Thus, within the range of considered dosages, it seems that 0.5 % dosage achieved the best coating performance evidenced by the lowest capillary sorptivity and chloride permeability, overcoming the disadvantages of 0.3 % (not enough) and 1.0 % (noticeable agglomerations).

In addition, TiO2-graphene addition seems to have no significant impact on the gas permeability of the epoxy resin coated OPC concrete. Overall, the cost-effective fabrication method and improved impermeability of OPC concrete coated by the epoxy resin which is enhanced by the TiO2-graphene nano-composite create more opportunities for epoxy resin being utilised as surface coatings for cementitious binders.

The study has been published in Progress in Organic Coatings, Volume 151, February 2021.

Resins for water-borne coatings - EC Library


Resins for Water-borne Coatings

Expand your knowledge and get fully acquainted with the various aspects of water-borne coatings - from production to properties to special features of their use! With the slow change from solvent-borne resins and coatings to water-borne coatings "Resins for waterborne coatings" is a must-read for any formulator wanting to expand their knowledge. The authors discuss important aspects of the "solvent-to-water-transition" of the past 40 to 50 years, take a deep dive into the key aspects and theories behind the production, properties and applications of these resins as well as providing an overview of how they are currently used in water-borne coatings.

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