冬季桥梁墩柱混凝土蒸汽养护温湿控制研究OA

In view of the poor effect of bridge pier concrete maintenance in winter,the difficulty and high cost of traditional insulation shed construction,the application test of intelligent steam shield of pier concrete was carried out in the project of Fenghe Bridge in Qinzhen Town,Xi'an High-tech Zone.The results show that the optimum curing temperature of steam curing cover is 70℃,and the intelligent steam curing cover can be used to maintain the moisture of pier concrete for a long time.Compared with natural maintenance,the carbonization depth of concrete surface of 56-day-old bridge pier columns cured by steam curing cover is reduced by 61.1%,the rebound strength of pier concrete is increased by 17.89%,and the surface compactness of concrete is significantly improved.The use of intelligent steam cover can not only improve the maintenance quality,but also easy to operate,save time and labor,save water resources,and has better social and economic benefits.