Durability Aspects of Precast Prestressed Concrete Part 1 : Historical Review

Durability Aspects of Precast Prestressed Concrete Part 2: Chloride Permeability Study

“…The water tank-cured slabs were placed in lime saturated water for 3 1 h days after they were stripped. After 3 1 12 days in the tank, they were removed and wrapped in wet burlap for another 2 1 h days.…”

“…(38 and 50 mm) cover is recommended by the 1995 ACI 318-95R 10 for precast concrete for walls and slabs, and for other members, respectively, when exposed to corrosive environments. These ACI recommended values are 2 and 2 1 12 in. (50 and 62 mm) for cast-in-place concrete walls and slabs, and for other members, respectively, for the same environment.…”

“…T he excellent durability of heatcured, precast, prestressed concrete bridge and parking garage structures over the past 45 years, resulting from the use of water-cement ratios (w/c) between 0.30 and 0.40, is discussed in Part 1 of this report. 1 In Part 1, a review of literature from 1960 to 1994 was performed to explain the history and past performance of precast, prestressed concrete highway, parking, and other structural concrete systems exposed to large amounts of chloride, and freezing and thawing. Essentially, all of these precast, prestressed concrete structural members were heat cured or steam cured without any in-plant supplemental moist curing following the overnight heat curing.…”

Influence of compressive stress on chloride transport in the interfacial zone of precast and cast‐in‐place concrete

“…9 Since then, many studies have shown that the joint between new and old concrete has low strength and poor durability and can be easily damaged under the influence of shrinkage or load. [10][11][12] Peterman et al 13 conducted an experimental study of fatigue damage followed by immersion in chloride solution. The reported results showed that the composite concrete developed severe cracks along the joint direction at interior piers under shrinkage and fatigue load.…”