Proceedings PaperEarly detection of deterioration of concrete by holographic interferometry
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The problem of lifetime and durability of reinforced concrete structures has become more important in the last decades, due to different factors the most important being: (1) The exponential growth of building activity after World War II, multiplying the items subjected to deterioration processes. (2) The growing aggressiveness of the environment in areas with a high concentration of industry, but also in urban environment. (3) Developments in design principles and concrete technology, resulting in more slender structural elements. (4) Sometimes a lack of care in execution, promoted by a high building rate and wrongly applied economic considerations. Since the late seventies, all this has led to intensified research about the causes and the nature of degradation processes and to the development of general strategies for handling such situations. General strategies for handling the problem were laid down in European standardization documents, published in 1988.