The Influence of Micro Cracks Appearing During Concreting of Road Viaducts and Their Impact on a Frost-Thaw Resistance
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Submission date: 2020-03-04
Final revision date: 2020-08-03
Acceptance date: 2020-08-04
Publication date: 2020-12-11
Archives of Civil Engineering 2020;66(4):221-236
In the latest period hundreds of concrete viaducts were built in Poland within a short time range. The cases of destruction of concrete road viaducts described by the author in the article concern in the construction of such structures in various parts of our country, such as central regions of Poland, Warmia-Masuria, south – east - a total of about 30 objects. The occurring phenomenon is related to the micro cracks of the cement matrix which are not visible on the surface of the elements and become visible only after the cyclic freezing process as a result of the standard F150 frost resistance test, the so-called the standard method according to Annex N to the PN-B-06265: 2018 standard. The destruction took an unprecedented course and aroused much discussion in the scientific community. This article summarizes this discussion and indicates the root cause of the destruction.
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