Concrete Cover in Thin-Wall Reinforced Concrete Floating Piers.

摘要

A critical appraisal of the technical literature dealing with thin-wall reinforced concrete pontoons,corrosion of steel reinforcement in concrete exposed to marine conditions,and cracking of reinforced concrete exposed to weathering was made for the period covering the past 75years. The assessment revealed useful information leading to the recommendation that additional experimentation is unnecessary for establishing a guide to fixing the minimum depth of concrete covering steel reinforcement in a floating pier or landing stage consisting of an assembly of precast concrete cells wherein the allowable maximum overall thickness of wall in any cell is restricted to 2inches. Based on the information developed in this study,it is concluded that a 5/8-in.-thick concrete cover is the minimum acceptable,provided that certain limitations are observed regarding composition of the concrete,size of the reinforcing steel,and application of protective coating to the reinforcement and the exterior of the floating structure. (Author)