Wpływ soli litu na reakcję krzemionki ze związkami sodu w zaprawach z cementu glinowego poddanych korozji w roztworach środków odladzających

Kotwica, Łukasz; Florek, Katarzyna

Artykuł - szczegóły

Tytuł artykułu

Wpływ soli litu na reakcję krzemionki ze związkami sodu w zaprawach z cementu glinowego poddanych korozji w roztworach środków odladzających

Autorzy

Kotwica Łukasz , Florek Katarzyna

Wybrane pełne teksty z tego czasopisma

http://www.cementwapnobeton.pl/

Identyfikatory

Warianty tytułu

The influence of lithium compounds on alkali–silica reaction in calcium aluminate cement mortars subjected to the deicing salts attack

Języki publikacji

PL EN

Abstrakty

W artykule przedstawiono wyniki badań wpływu dodatku azotanu oraz węglanu litu na reakcję krzemionki ze związkami sodu w zaprawach z cementu glinowego, poddanych działaniu soli odladzających. Zaprawy z dodatkiem szkła kwarcowego, jako kruszywa reaktywnego poddawane były działaniu 4,5 molowych roztworów octanu, chlorku, wodorotlenku sodu według zmodyfikowanej metody ASTM C1260. We wszystkich przypadkach zaprawy wykazywały ekspansję największą dla próbek przechowywanych w roztworze octanu, najmniejszą zaś w przypadku próbek przechowywanych w wodorotlenku. Dodatek 1% węglanu litu w stosunku do masy cementu nieznacznie zmniejsza ekspansję zapraw w obu tych roztworach, natomiast dodatek 1,86% i 3,73% azotanu litu zwiększa tę ekspansję. Dodatek 1,86% azotanu litu zmniejsza ekspansję zaprawy przechowywanej w roztworze wodorotlenku sodu, a dodatek 3,73% azotanu litu zwiększa ekspansję tej zaprawy. W pracy opisano również wpływ związków litu na zmiany mikrostruktury zapraw.

Paper presents the results of research on the effect of the lithium nitrate and carbonate addition on the alkali - silica reaction in calcium aluminate cement mortars, subjected to the a deicing salts attack. Mortars with the addition of quartz glass as the reactive aggregate were immersed in 4.5 molar sodium acetate, chloride and hydroxide solutions according to the modified ASTM C1260 method. In all cases, the mortars exhibited expansion, the highest for samples immersed in the acetate solution, and the lowest in the hydroxide solution. The addition of 1% of lithium carbonate in respect to the cement mass slightly reduces the expansion of mortars immersed in sodium acetate and hydroxide solutions. The addition of 1.86% and 3.73% of lithium nitrate increases the expansion of mortars immersed in both solutions. The addition of 1.86% lithium nitrate reduces the expansion of the mortar stored in sodium hydroxide solution, while 3.73% of this addition increases the expansion of this mortar. Changes in the microstructure were also presented.

Słowa kluczowe

cement glinowy korozja kruszywa pH reakcja krzemionka–alkalia sól odladzająca roztwór stężony związek litu

alkali–aggregate reaction alkali-silica reaction calcium aluminate cement concentrated solution deicing salt pH lithium compound

Wydawca

Fundacja Cement, Wapno, Beton

Czasopismo

Cement Wapno Beton

Rocznik

2019

Tom

R. 24/86, nr 1

Strony

56--67

Opis fizyczny

Bibliogr. 41 poz., il., tab.

Twórcy

autor

Kotwica Łukasz

lkotwica@agh.edu.pl

AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Building Materials Technology, Kraków, Poland

autor

Florek Katarzyna

BARG Laboratorium Budowlane Sp. z o.o., Kraków, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-2f925007-feac-4a22-89ae-a78023ce5e7d