Synergism Effects of Coating and Concrete Plaster to Reduce 222Rn Emanations from Red Brick

Abstract

The study revealed the synergism effects of concrete plaster and coatings in reducing 222 Rn from a marketable red brick. The methodology applied is the common practice in construction industry for wall finishing. 222 Rn concetrations level from red brick coated with three different type of coatings were measured within 5 consecutive days within 30 min times interval. The nett 222 Rn concentration of raw red brick (uncoated) was-0.22 pCi/L. From the results, 222 Rn concentration has drastically decreased after coated with coating B and C. 222 Rn cocentration seems to decreased with the range of-0.9 pCi/L to-0.3 pCi/L after coated with coating B and-0.8 pCi/L to-0.7 pCi/L after coated with coating C. Coating B shown the best performance in reducing 222 Rn emanations with lowest 222 Rn range concentration, high adhesion strength and good dynamic viscosity properties.