An estimation of concrete durability

Abstract

Recent trends in concrete durability design have favored the use of protective coatings. Although these coatings, if applied correctly, can totally inhibit degradation of the concrete member, these coatings are expensive. In the most severe conditions, the coatings are the only way to avoid extensive corrosion. In many cases, however, the coatings are used when less expensive means of avoiding concrete corrosion are available. If the type of degradation agents to which the concrete is to be exposed during its service life can be accurately predicted, the durability design requires only minor, inexpensive changes to the concrete mix proportions, the mix ingredients, or the structural detailing. This document provides a comprehensive guide to various types of concrete degradation and the mechanics involved with each type of degradation. For each of the degradation mechanisms discussed, several methods of designing concrete structural members, using only minor alterations in the concrete member, to resist degradation are provided in this document.