Concrete Bridge Decks: Lightweight Aggregate Concrete Subject to Severe Weathering

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Title: Concrete Bridge Decks: Lightweight Aggregate Concrete Subject to Severe Weathering

Author(s): T. A. Holm, T. W. Bremner and J. B. Newman

Publication: Concrete International

Volume: 6

Issue: 6

Appears on pages(s): 49-54

Keywords: bond (paste to aggregate); bridge decks; concrete durability; corrosion; cracking (fracturing); ex-posure; lightweight aggregate concretes; lightweight aggregates; marine atmospheres; microcracking; mi-crostructure; permeability; ships; weathering.

Date: 6/1/1984

Abstract:
The influence of the internal structure of lightweight aggregate on the physical and durability characteristics of concretes used in severe weathering applications is examined. Scanning electron microscopy studies on cores from weathered surfaces of mature structures are reported and compared with field experience. Cracking response and other mechanical properties are related to the characteristics of the lightweight aggregate.