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Bibliografia publikacji pracowników
Państwowej Szkoły Wyższej w Białej Podlaskiej

Baza tworzona przez Bibliotekę Akademii Bialskiej im. Jana Pawła II.


Zapytanie: GRZEGORCZYK-FRAŃCZAK MAŁGORZATA
Liczba odnalezionych rekordów: 2



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Nr opisu: 0000047497
Autorzy: Małgorzata Grzegorczyk-Frańczak, Wojciech Andrzejuk, Robert Hunek, Grzegorz Łagód.
Tytuł pracy: Effect of Surface Hydrophobization on the Durability of Concrete with Cement Kiln Dust
Tytuł czasopisma:
Szczegóły: 2024, Vol. 18, issue 3, p. 214--233
p-ISSN: 2080-4075
e-ISSN: 2299-8624
Charakterystyka formalna: artykuł w czasopiśmie polskim
Charakterystyka merytoryczna: artykuł oryginalny naukowy
Charakterystyka wg MNiSW: artykuł w czasopiśmie z IF (wykaz MEiN)
Język publikacji: ENG
Wskaźnik Impact Factor ISI: 1.100
Punktacja ministerstwa: 100.000
Słowa kluczowe ang.: cement kiln dust ; concrete ; frost resistance ; hydrophobization ; salt crystalization
http://www.astrj.com/Effect-of-Surface-Hydrophobization-on-the-Durability-of-Concrete-with-Cement-Kiln,186212,0,2.html
DOI: 10.2913/22998624/186212
Streszczenie: The examinations of concrete involved partial substitution of cement with cement kiln dust (CKD) 0, 5, 10, 20 and 30%. The water/cement (w/c) ratio amounted to 0.36. The obtained findings pertaining to open porosity, density, and volumetric density were found to correlate with the capillary action and absorptivity of the analyzed types of concrete. With the maximum addition of CKD, i.e. 30%, open porosity decreased by 35%. In turn, CKD added in the amount of 5% resulted in a slightly reduced addition compressive strength, amounting to 1.3% and 2.1% following 28 days and 56 days of concrete curing, respectively. After 28 days, the differences in strength were greater when the additive was supplied in higher amounts, i.e. 10%, 20%, and 30%, resulting in 6.5%, 13.4%, and 22.9% decrease, respectively, in spite of strength improvement. In terms of flexural and splitting tensile strengths, comparable relations were noted. As far as the frost resistance test results are concerned, the mass losses in all examined concretes were not significant, reaching up to 0.5%. The strength reduction in the case of the first three series of concretes was below 3%. When the CKD addition was increased to 20% and 30%, the value of the dynamic modulus of elasticity Ec,s decreased to a greater degree, by 8.0% and 14.7%, respectively. The hydrophobization effect is best seen in CKD-free concrete. After the impregnation, the loss of mass following the frost test of the samples is reduced by half. With a higher CKD content, the hydrophobization effectiveness is insignificant. The most favourable results were observed for hydrophobization with the oligomer-based preparation A1. Š 2024, Politechnika Lubelska. All rights reserved.

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Nr opisu: 0000041502
Autorzy: Małgorzata Grzegorczyk-Frańczak, Danuta Grażyna Barnat-Hunek, Wojciech Andrzejuk, Jacek Zaburko, Monika Zalewska, Grzegorz Łagód.
Tytuł pracy: Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases
Tytuł czasopisma:
Szczegóły: 2021, Vol. 14, issue 8, article number 1902
p-ISSN: 1996-1944
Charakterystyka formalna: artykuł w czasopiśmie zagranicznym
Charakterystyka merytoryczna: artykuł oryginalny naukowy
Charakterystyka wg MNiSW: artykuł w czasopiśmie z IF (wykaz MEiN)
Język publikacji: ENG
Wskaźnik Impact Factor ISI: 3.748
Punktacja ministerstwa: 140.000
Słowa kluczowe ang.: micro-nano bubble water ; oxygen ; ozone ; CO2 ; lime-cement mortars ; nano admixtures
https://www.mdpi.com/1996-1944/14/8/1902
DOI: 10.3390/ma14081902
Streszczenie: The paper presents the experimental studies on the effect of the water containing micro-nano bubbles of various gases on the physico-mechanical properties of lime-cement mortars. In total, 7 types of mortars were prepared: with water containing the micro-nano bubbles of O2, O3 or CO2 as 50% or 100% substitute of ordinary mixing water (tap water) and the reference mortar prepared using tap water. In order to determine the influence of water with micro-nano bubbles of gases, the consistency of fresh mortar and the physical properties of hardened mortar, i.e., specific and apparent density, total porosity, water absorption by weight and capillary absorption, were established. The mechanical strength of the considered mortars was studied as well by conducting the tests for flexural and compressive strengths following 14, 28 and 56 days. Reduced workability and capillary absorption were observed in the modified mortars within the range of 0.9-8.5%. The mortars indicated an increase in the flexural strength after 28 days ranging from 3.4% to 23.5% and improved compressive strength in 1.2-31%, in comparison to the reference mortar. The conducted studies indicated increased flexural and compressive strengths along with the share of micro-nano bubbles of gases in the mixing water.
Projekt/grant: Modyfikacja właściwości zapraw wapienno-cementowych nano o mikropęcherzykami wypełnionymi zamkniętym gazem : Fundusz Rozwoju Nauki PSW, PB/14/2020

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