Efflorescence on concrete products has represented a constantly recurring topic in the processing of complaints about concrete paving stones and concrete slabs. The experts have argued equally as long over whether efflorescence does or does not represent a defect from a technical point of view. The first part of the following article deals with the principles of evaluation of efflorescence on paving, differentiation from other causes of discoloration, possible verification methods and the effects on the technical properties of products.
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