Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
The addition of microsilica was widely used in concretes and mortars since the second half of the 20th century (in high and very high strength concretes). Silica fume consists of very fine spherical particles. This additive, thanks to its properties, fills the space between cement particles and aggregates which affects: porosity, watertightness, shrinkage reduction and increased strength. The microsilica has pozzolanic properties and reacts with calcium hydroxide and gradually forms a uniform and continuous contact phase C-S-H (calcium-silicat hydrate). The interfacial zone between cement paste and aggregate has been considered as a zone of weakness. Zeolite is a material lesser known in civil engineering which can be used as an alternative to microsilica. The article presents the investigation of the physical properties of mortars containing these two types of pozzolan. In mixes pozzolan additives at 0 to 20 percent by mass of portland cement are used. Testing of such properties of fresh mortar as workability and air content was carried out. The properties of hardened mortar such as strength, water absorption, frost resistance and capillary suction were also determined.
Rocznik
Tom
Strony
109--116
Opis fizyczny
Bibliogr. 10 poz., rys., tab.
Twórcy
autor
- Lodz University of Technology, Faculty of Civil Engineering, Architecture and Environmental Engineering, Department of Building Physics and Building Materials, al. Politechniki 6, 90-924 Łódź, Poland; tel. +48 42 631 35 63
Bibliografia
- [1] Wolska-Kotańska C.: Stosowanie pyłów krzemionkowych do wykonywania betonów narażonych na działanie wybranych warunków środowiskowych. Instrukcja ITB nr 362/99. ITB, Warszawa 1999.
- [2] Domieszki do betonów. Izolacje 11/12/2012.
- [3] https://pl.wikipedia.org/wiki/Dodatki_do_betonu {access 20.04.2018 r.}.
- [4] EN 196-1:2016-07: Methods of testing cement. Determination of strength.
- [5] Przerada I., Lubas M.: Wpływ dodatku popiołu lotnego i mikrokrzemionki na właściwości zapraw cementowych i betonów Materiały Budowlane 1/2004.
- [6] Bundyra-Oracz, G. Siemaszko-Lotkowska, D.: Zeolit - dodatek pucolanowy do betonu Budownictwo, Technologie, Architektura X-XII/2010.
- [7] Wpływ dodatku zeolitu na właściwości fizykomechaniczne tynków renowacyjnych Izolacje 9/2014.
- [8] PN-B-04500:1985: Mortars. Phisical and mechanical tests.
- [9] EN 1015-7:2000 Methods of test for mortar for masonry. Determination of air content of fresh mortar.
- [10] EN 1015-18:2003 - Methods of test for mortar for masonry. Determination of water absorption coefficient due to capillary action of hardened mortar.
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-4ace7bad-9828-46cd-a1a1-663bc326b611