"The effect of aging on the carbonation resistance of coated concrete" is to study the carbonation resistance and environmental climate resistance of coated concrete. The coated concrete specimens were aged in three ways, such as UV irradiation, and then tested for its anti-carbonation performance, and compared and analyzed with the anti-carbonation performance of the coated concrete before aging, in order to study the effects of various coatings on concrete. Carbonization protection performance and anti-aging performance.
Table 1 4 common paints and their dosage
The conclusions show that:
1) The carbonation protection effect of film-forming coatings on concrete is generally better than that of permeable coatings, while the anti-carbonation effect of cement-based permeable crystalline coatings
And better than silicone penetrating coating. The carbonization protection ability of the four selected coatings on concrete is as follows: polyurethane coating ≈ epoxy resin coating > cement-based crystalline coating > silicone coating.
2) The carbonation resistance of film-forming coated concrete will gradually decrease with the aging of the coating, while the carbonation resistance of permeable coated concrete
Basically remain unchanged. The anti-aging ability of the four coatings selected is as follows: cement-based crystalline coating ≈ organic silicon coating > polyurethane coating > epoxy resin coating.
3) For film-forming coatings, the efficiency of UV aging is higher than that of dry and wet aging, and the efficiency of dry and wet aging is higher than that of natural aging. laboratory artificial climate
The accelerated aging method and the natural exposure aging method have a good correlation to the degradation development law of the carbonation resistance of coated concrete.
