The effect of silica fume and zeolites on the leaching of ions from the cement matrix in environments of varying pH

• Autorzy: Estokova Adriana , Sicakova Alena , Kovalcikova Martina

Identyfikatory

DOI

10.15199/40.2020.11.1

Warianty tytułu

PL

Wpływ krzemionki płomieniowej i zeolitów na wymywanie jonów z matrycy cementowej w środowiskach o różnym pH

• Języki publikacji: EN

Abstrakty

EN

Concrete is a versatile construction material that can be used in a wide range of service and environmental conditions. Sustainable concrete is characterized by two basic features. It should withstand those conditions that can impact its service life (and should be identified during design and addressed in project specifications) as well as it contains some alternative raw materials in its composition. The paper aims at a simultaneous study of both chemical and engineering properties of concretes after an acidic exposure. For this purpose, a specific experimental program was set and executed, with the aim of using the proper size of samples for individual testing methods. Two kinds of additions (silica fume and zeolite) were used as concrete components. Two aspects of the impact of concrete´s composition were investigated: the impact on chemical behaviour (leaching the main concrete components) and the impact on physical-mechanical properties (density, water absorption capacity, flexural and compressive strength). Findings revealed that the best resistivity against HCl attack has been proven for the samples with silica fume addition only. The physico-mechanical performance of large-sized concrete´s and the results of leaching of small-sized concrete´s samples exposed to hydrochloric acid correlated well. The comparison of chemical and physical-mechanical performance of samples points to the necessity of complex evaluation of concrete durability.

PL

Beton jest wszechstronnym materiałem budowlanym, który można stosować w różnych środowiskach. „Zrównoważony” beton charakteryzuje się dwiema podstawowymi cechami: powinien wytrzymać warunki, które mogą wpłynąć na jego trwałość (i powinny zostać zidentyfikowane podczas projektowania i uwzględnione w specyfikacjach projektu), a także zawiera w swoim składzie pewne alternatywne surowce. W celu jednoczesnego badania właściwości chemicznych i inżynieryjnych betonu po ekspozycji w środowisku kwaśnym opracowano i uruchomiono specjalny program eksperymentalny, mający na celu zastosowanie odpowiedniej wielkości próbek dla poszczególnych metod testowania. W betonie zastosowano dwa rodzaje dodatków – krzemionkę płomieniową i zeolit. Przebadano wpływ dodatków na właściwości chemiczne (ługowanie głównych składników betonu) oraz na właściwości fizyko- -mechaniczne (gęstość, zdolność absorpcji wody, wytrzymałość na zginanie i ściskanie). Badania wykazały, że najlepszą odpornością na atak HCl charakteryzują się próbki z dodatkiem krzemionki płomieniowej. Uzyskano dobrą korelację właściwości fizyko-mechanicznych dla dużych i małych próbek betonu narażonych na działanie kwasu solnego. Porównaniem właściwości chemicznych i fizyko-mechanicznych próbek wskazuje na konieczność kompleksowej oceny trwałości betonu.

Słowa kluczowe

EN

acidic corrosion; concrete; hydrochloric acid; silica fume; zeolite

PL

korozja kwasowa; beton; kwas solny; krzemionka płomieniowa; zeolit

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Ochrona przed Korozją
• Rocznik: 2020
• Tom: nr 11
• Strony: 358--363
• Opis fizyczny: Bibliogr. 28 poz., tab., wykr.

Twórcy

autor

Estokova Adriana

• Department of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 042 00 Kosice, Slovakia

autor

Sicakova Alena

• Department of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 042 00 Kosice, Slovakia

autor

Kovalcikova Martina

• Department of Material Engineering, Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 042 00 Kosice, Slovakia

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).