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POSSIBILITY OF ALKALI ATTACK TO CONCRETE PAVEMENT FROM EXTERNAL SOURCES
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J. Grosek; B. Dohnalkova; J. Hegrova; T. Zavrel; O. Machel
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1314-2704
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English
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21
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1.1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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Recently, there have been cases of lower durability related to concrete pavements in the transport infrastructure in the Czech Republic. One of the main causes seems to be the increased amount of alkalis in the concrete, which may not have come only from individual components or through winter maintenance. This paper describes a research activity which deals with possibilities of alkali attack from the surrounding environment. The pilot testing provides valuable information on alkalis concentrations in real conditions. Soil and groundwater samples around the concrete pavement were taken from a highway section and the results of laboratory testing according to selected procedures were compared. The authors try to find a relationship between expansive reactions and the effect of the external environment. The determination of alkali concentration in different media, where sodium and potassium here critical for concrete, was derived from the conclusions and will be important for the use of measures in practice.
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conference
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21st International Multidisciplinary Scientific GeoConference SGEM 2021
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21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
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Proceedings Paper
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STEF92 Technology
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SGEM International Multidisciplinary Scientific GeoConference
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
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83-90
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16 - 22 August, 2021
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website
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cdrom
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7744
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concrete pavement; soil; alkalis; groundwater; expansive reactions
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