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RESISTANCE OF CONCRETE MODIFIED WITH STYRENE-ACRYLATE BASED ADMIXTURE TO AGGRESSIVE ENVIRONMENT

Dobias, D.; Citek, D.; Pokorny, P.; Kolisko, J.
Abstract:
Article is describing results of an experimental program focused on development of concrete, resistant to impacts of low pH environment. To a very low pH (2-4) is concrete often exposed when used in agricultural production (for example for silage or hay silage pits). Therefore, its degradation with such a low pH is very fast. The experimental part of the work focused on modification of concrete with sealing admixture on the basis of styrene-acrylate. We prepared set of 3 concrete mixtures with different dosing of styrene-acrylate. We subsequently monitored resistance of these 3 mixtures and 1 reference mixture to a liquid aggressive environment with pH 2 and pH 3. Testing bodies prepared from these mixtures were set in the given environment for the period of 180 days and then tested. We used mechanical tests, pull-off tests and determination of depth of aggressive environment penetration in the concrete with help of SEM/EDS analysis. Polymer admixture had significant impact mainly on reduction of the depth of penetration of aggressive environment in the concrete. Positive impact of the admixture was however also noticed in resistance of concrete surface layers tested by pull-off tests. Generally, we can state that in dependence on the dose rate of polymer the concrete resistance to low pH increased.
SGEM Research areas:
Year:
2019
Type of Publication:
In Proceedings
Keywords:
concrete; styrene-acrylate; low pH environment; corrosion resistance.
Volume:
19
SGEM Book title:
19th International Multidisciplinary Scientific GeoConference SGEM 2019
Book number:
6.2
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
247-254
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
30 June - 6 July, 2019
ISBN:
978-619-7408-89-8
ISSN:
1314-2704
Conference:
19th International Multidisciplinary Scientific GeoConference SGEM 2019, 30 June - 6 July, 2019
DOI:
10.5593/sgem2019/6.2/S26.032
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