Evaluation of the effect of a hydrophobic agent on the frost resistance of concrete

openaccess, Vol 560 (4) 2019 / czwartek, 2 maja, 2019

(Open Access)

A. Kłak,
H. Kowalczyk

DOI: 10.15199/33.2019.04.10

Volume 560: Issue 4
Pages 61-64
Accepted for publication:  04.02.2019 r.

This paper investigates the effect of applying protection on concrete surface and influence of hydrophobic agent on concrete frost resistance. The investigation was conducted by a two of freeze-thawmethods: surface scaling and standardmethod. Concrete samples made of Portland cement CEM I 42.5 HSR were tested for water absorption, compressive strength, capillary suction and freeze-thaw resistance. It have been shown that the surface protection of the hydrophobic agent influences the capillary suction limit, which allows to improve the results during the frost resistance test.All samples subjected to the hydrophobic treatment fulfill the condition of total weight of the scaled material, not exceeding the value of 1.5 kg/m2 in accordance to PN-EN 12390-9 standard. Test results of standard method didn’t meet the requirement of PN-B-06265 standard. Crackswas visible on surface of specimen and also their compressive strength was more than 20% lower than the reference samples. Keywords: concrete; freeze-thaw resistance; scaling; hydrophobic agents; capillary suction.
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dr inż. Adam Kłak mgr inż. Henryk Kowalczyk, Politechnika Świętokrzyska; Wydział Budownictwa i Architektury

mgr inż. Henryk Kowalczyk, Politechnika Świętokrzyska; Wydział Budownictwa i Architektury

hkowalczyk@tu.kielce.pl

Full paper:

DOI: 10.15199/33.2019.04.10