Study On Surface Coating Protection Of Reinforced Concrete Structures In Marine Environment

It is common that marine corrosion causes the structure durability failure anddamage of reinforced concrete. This brings huge economic losses and has attractedattention of all countries. So it is imminent to take corresponding anti-corrosionmeasures. It has been found that surface coating is most economic and effectivemeasure to reinforced concrete structure in marine environment.This paper selected four kinds of surface coating technologies used in different mixproportion. It studied the chloride ion erosion resistance, air permeability, waterpermeability comparing different concrete whether mixed with fly ash after surfaceprotection. The specific content is following.By using rapid chloride penetration test (RCM), the results showed that theprevention of chloride penetration was significant as protective coating applied on theconcrete. The influence of the addition of fly ash on resistance of chloride penetrationwas significant to penetration type group and small to film type group. Meanwhile theeffect of water-cement ration on resistance of chloride penetration was very small tofilm type group.The air permeability was not changed to penetration treated concrete and was lostto film treated concrete by using Autoclam permeability test. The moisture resistance offilm coating was significant.The durability of the coatings was good by testing the adhesion, fitting ability tocrack, corrosion resistance, salt fog resistance, and aging resistance. They met theanticorrosion need in corresponding environment.This paper will provide reference and basis for marine engineering protection through the research.