Wybrane metody przeciwdziałania skutkom reaktywności kruszywa żwirowego

• Autorzy: Zapała-Sławeta Justyna , Owsiak Zdzisława

Warianty tytułu

EN

Selected methods of preventing the effects of gravel aggregate reactivity

• Języki publikacji: PL

Abstrakty

PL

Przedstawiono wyniki badań dotyczące skuteczności dodatku metakaolinu i azotanu litu w zapobieganiu negatywnym skutkom reakcji alkaliów z kruszywem naturalnym. Oceniono efektywność wybranych inhibitorów korozji według przyspieszonej metody badania zmian ekspansji zapraw według ASTM C1576 oraz betonów według ASTM C1293. Badania uzupełniono wynikami obserwacji mikrostruktury pod elektronowym mikroskopem skaningowym, z analizą składu chemicznego w mikroobszarach. Wyniki badań ekspansji betonu wykazały większą skuteczność metakaolinu w zmniejszeniu zagrożenia reaktywności alkalicznej kruszywa żwirowego.

EN

Efficacy of metakaolin and lithium nitrate used to inhibit negative effects of alkali-natural aggregate reaction was presented. Both corrosion inhibitors were assessed with the accelerated method of measuring expansion changes in mortars (ASTM C1576) and concretes (ASTM C1293). Scanning electron microscopy was used to observe the microstructure and perform chemical analysis in microareas. The results of concrete expansion tests showed that metakaolin was more effective in suppressing alkali reactivity of the gravel aggregate.

Słowa kluczowe

PL

dodatek do betonu; metakaolin; azotan litu; reaktywność alkaliczna; kruszywo żwirowe; inhibitor korozji; mikrostruktura; ekspansja betonu

EN

concrete additive; metakaolin; lithium nitrate; alkali reactivity; gravel aggregate; corrosion inhibitor; microstructure; concrete expansion

• Wydawca: Fundacja Polskiego Związku Inżynierów i Techników Budownictwa
• Czasopismo: Inżynieria i Budownictwo
• Rocznik: 2020
• Tom: R. 76, nr 11
• Strony: 542--546
• Opis fizyczny: Bibliogr. 35 poz., il., tab.

Twórcy

autor

Zapała-Sławeta Justyna

• Wydział Budownictwa i Architektury, Politechnika Świętokrzyska

autor

Owsiak Zdzisława

• Wydział Budownictwa i Architektury, Politechnika Świętokrzyska

Bibliografia

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