详情

Protocols for Concrete Bridge Deck Protections and Treatments

项目名称：	Protocols for Concrete Bridge Deck Protections and Treatments
摘要：	In cold climate zones, deicing chemicals are applied to roads and bridge decks to melt snow and ice to help maintain safe traffic operations. Bridges are vulnerable to the use of deicing chemicals that may include chlorides. Over time, chlorides infiltrate the concrete deck and reach reinforcement within the deck. Most deicing chemicals have a detrimental effect to the long-term condition of the bridge deck by promoting corrosion of the deck reinforcement and deterioration of the concrete. Bridge owners are faced with a number of strategies and tools to maximize the life of bridge decks. Many of these tools include crack filling and penetrant sealers or crack filling and/or thin overlays that are applied as methods to retard the infiltration of chlorides or to seal the deck from these chlorides. Penetrant sealers generally require more frequent (4-5 years) applications than thin polymer overlays (10-12 years). However, the application cost of the penetrant sealer is significantly less than the thin polymer overlay. The objective of this research is to develop recommendations and guidelines for protocols on the use of crack and penetrant deck sealers and thin polymer overlays. The recommendations should take the form of a lifecycle guide that would efficiently maximize the condition and longevity of bridge decks. The lifecycle guide should address progressive strategies and treatments (i.e., penetrant sealers, crack sealing, thin overlay, concrete overlay, deck replacement, etc.) and the transition points in the bridge deck criteria in which the optimal treatment should be applied to the bridge deck (i.e. age, condition state, presence of chlorides, etc.), as well as the application frequency, and the point in the lifecycle where the treatment is no longer an effective or economical strategy.
状态：	Active
资金：	140000
资助组织：	Wisconsin Department of Transportation
执行机构：	Iowa State University, Ames
主要研究人员：	Aldemir Bektas, Basak
开始时间：	20171002
预计完成日期：	20191002
实际结束时间：	0