Metakaolinit jako pucolanowy dodatek do betonu - przegląd stanu wiedzy

• Autorzy: Małaszkiewicz D.

Warianty tytułu

EN

Metakaolin as a pozzolanic addition for concrete - review

• Języki publikacji: PL

Abstrakty

PL

Mineralne dodatki do betonu stały się integralnym jego składnikiem. Zastępują one częściowo cement portlandzki, którego produkcja jest energochłonna i uciążliwa dla środowiska naturalnego. Wykorzystywane są materiały naturalne, odpady przemysłowe, produkty uboczne pochodzące z różnych gałęzi przemysłu lub inne materiały, których wyprodukowanie pochłania mniej energii niż produkcja cementu. W ostatnich latach odnotowuje się coraz większe zainteresowanie wykorzystaniem kalcynowanej gliny w postaci metakaolinitu (ang. metakaolin) jako pucolanowego dodatku do zapraw i betonów, który pozwala na poprawę parametrów mechanicznych i trwałość kompozytów cementowych. W artykule przedstawiono przegląd stanu wiedzy nad zastosowaniem metakaolinitu jako częściowego zamiennika cementu, szczególnie przydatnego w zaprawach i betonach narażonych na agresywne działanie środowiska. Badania świadczą o tym, że metakaolinit może być efektywnym dodatkiem poprawiającym mikrostrukturę, a tym samym trwałość betonu.

EN

Mineral additions have become an integral part of concrete technology. They are a partial replacement of Portland cement, the manufacture of which requires high energy consumption and is environmental damaging. These may be naturally occurring materials, industrial wastes, by-products or materials requiring less energy to manufacture. The utilization of calcined clay, in the form of metakaolin, as pozzolanic addition for mortars and concretes has received considerable attention in recent years. It improves mechanical performance and exhibits considerable enhancement in durability properties. This paper presents an overview of the work carried out on the use of metakaolin as partial replacement of cement particularly useful in mortars and concretes subjected to hazardous environment. The literature demonstrates that metakaolin is an effective addition which causes improvement in the pore structure and hence the durability.

Słowa kluczowe

PL

beton; metakaolinit; właściwości mieszanki betonowej; trwałość betonu

EN

concrete; metakaolin; properties of concrete mix; durability of concrete

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Budownictwo i Inżynieria Środowiska
• Rocznik: 2015
• Tom: Vol. 6, no. 2
• Strony: 81--94
• Opis fizyczny: Bibliogr. 61 poz., rys., tab.

Twórcy

autor

Małaszkiewicz D.

• Wydział Budownictwa i Inżynierii Środowiska, Politechnika Białostocka, ul. Wiejska 45A, 15-351 Białystok

Bibliografia

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