Statistical Survey on Inspection, Diagnosis, and Repair of Architectural Concrete Surfaces

Abstract

This paper describes a statistical survey on the pathology of architectural concrete surfaces, based on the inspection of 53 Portuguese buildings (110 surfaces). The most common type of anomalies in architectural concrete surfaces, their probable causes, adequate diagnosis methods, and suitable maintenance and repair techniques are studied via quantitative indicators, including correlations, in the application of the procedures and classifications from an inspection, diagnosis, and repair expert system for architectural concrete surfaces. The structural integrity of concrete elements is out of this paper’s scope. The results show the importance of a complete set of construction details, including the formwork specifications, which are essential for the surfaces’ quality. Related to two-thirds of the registered causes of anomalies, execution is a key stage, greatly benefiting from the use of specialized labor. Regular cleaning procedures and the enhancement of surface protection throughout the surface service life may also prevent a number of relevant anomalies, as the most frequent anomalies (approximately half the occurrences) are aesthetic.