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Edge spalling at concrete products

Results from a current research project and practical tips for optimised production and damage assessment


Along with frost and de-icing salt damage, edge spalling, efflorescence and discolourations have always been the most frequent reasons for complaints relating to surfaces made of concrete paving stones. Edge spalling can be caused by flawed design, sub-standard quality of the paving stones, faulty laying or use of inappropriate material. Assessing the causes of such edge spalling has always presented a significant challenge to appraisers, since there are no testing and assessment criteria for the edge stability of paving stones in the form of standards, guidelines or codes of practice. Moreover, there is no reproducible information on typical (and therefore acceptable) edge spalling of paving stones as a function of surface utilisation and the edge finishing (sharp-edged or chamfered paving stones).

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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