Application of Protective Agent in Fair Faced Concrete of Large Low Speed Wind Tunnel Project
To improve the durability of plain concrete,comparative tests were conducted on the durability of plain concrete with three different protective agents,fluorocarbon,organosilicon,and acrylic,under different coating methods.The results show that compared with the benchmark test group,the durability of fair faced concrete after brushing protective agent is improved to varying degrees.The effect of finish paint on durability is stronger than that of primer.The improvement effect of fluorocarbon protective agent is better than that of silicone protective agent and acrylic protective agent,and the best brushing method is two layers of primer and two layers of finish paint;After applying two layers of primer and two layers of finish paint with fluorocarbon protective agent,the 48h water absorption,60 d carbonization depth and 60d chloride ion penetration depth were reduced by 78.9%,65.3%and47.3%respectivelycomparedwith the benchmark test group.After150 freeze-thaw cycles,the mass loss rate was only0.53%,the relative dynamic elastic modulus was83.3%,and the compressive strength corrosion resistance coefficient was 0.892.
万方数据
维普
