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Statements

Subject Item
n2:RIV%2F00216305%3A26310%2F13%3APU108656%21RIV15-MSM-26310___
rdf:type
n13:Vysledek skos:Concept
dcterms:description
The issue of hexavalent chromium toxicity in Portland cement hydration is very topical at present. It takes a lot of effort to obtain cements containing Cr(VI) less than 2 ppm. The primary goal of this thesis was to explore the influence of a substance which could reduce hexavalent chromium and at the same time retard the hydration of Portland clinker. It is a very important fact because Portland clinker after mixing with water starts to harden immediately. The substance, which has these properties, is ferrous sulphate. The reduction ability was determined by UV/VIS method. The concentration of hexavalent chromium leaching is significantly lower with the addition of a very small amount of ferrous salt. The calorimetric measure showed that ferrous sulphate can be used as a retarder substance in the hydration of Portland clinker. This fact involves the presence of sulphate anions. The next measurements performed were the strength tests. Their results showed the decrease in the strength when compared wit The issue of hexavalent chromium toxicity in Portland cement hydration is very topical at present. It takes a lot of effort to obtain cements containing Cr(VI) less than 2 ppm. The primary goal of this thesis was to explore the influence of a substance which could reduce hexavalent chromium and at the same time retard the hydration of Portland clinker. It is a very important fact because Portland clinker after mixing with water starts to harden immediately. The substance, which has these properties, is ferrous sulphate. The reduction ability was determined by UV/VIS method. The concentration of hexavalent chromium leaching is significantly lower with the addition of a very small amount of ferrous salt. The calorimetric measure showed that ferrous sulphate can be used as a retarder substance in the hydration of Portland clinker. This fact involves the presence of sulphate anions. The next measurements performed were the strength tests. Their results showed the decrease in the strength when compared wit
dcterms:title
The influence of ferrous sulphate on Portland clinker hydration The influence of ferrous sulphate on Portland clinker hydration
skos:prefLabel
The influence of ferrous sulphate on Portland clinker hydration The influence of ferrous sulphate on Portland clinker hydration
skos:notation
RIV/00216305:26310/13:PU108656!RIV15-MSM-26310___
n4:aktivita
n11:O n11:P
n4:aktivity
O, P(ED0012/01/01)
n4:dodaniDat
n10:2015
n4:domaciTvurceVysledku
n9:6652905 Hajdúchová, Miroslava
n4:druhVysledku
n7:O
n4:duvernostUdaju
n16:S
n4:entitaPredkladatele
n15:predkladatel
n4:idSjednocenehoVysledku
79759
n4:idVysledku
RIV/00216305:26310/13:PU108656
n4:jazykVysledku
n17:eng
n4:klicovaSlova
portland clinker, ferrous sulphate
n4:klicoveSlovo
n12:portland%20clinker n12:ferrous%20sulphate
n4:kontrolniKodProRIV
[9CC1F2731D92]
n4:obor
n14:CA
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
2
n4:projekt
n5:ED0012%2F01%2F01
n4:rokUplatneniVysledku
n10:2013
n4:tvurceVysledku
Šoukal, František Hajdúchová, Miroslava
n6:organizacniJednotka
26310