Please use this identifier to cite or link to this item: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1002099
Title: Behaviour of glass in cement-based materials: Its role on ASR
Authors: Serpa, D.
Santos Silva, A.
Soares, D.
Santos, M. B.
Brito, J.
Keywords: Waste-glass;Alkali–silica reaction;Pozzolanic reaction
Issue Date: Apr-2011
Publisher: Escola de Engenharia da Universidade do Minho
Citation: Book of Abstracts of the VI International Materials Symposium MATERIAIS 2011
Abstract: One of the most worrying degradation mechanisms in hardened concrete is the occurrence of chemical expansive reactions, namely due to alkali-silica reactions (ASR). This pathology involves the formation of expansive products inside the material. This situation is very difficult to deal with, because presently there is no efficient method to repair concrete structures affected by ASR. Hence, there is an urgent need to find preventive methods that may inhibit these reactions in new concrete structures. Nowadays, the use of pozzolanic mineral additions is recommended to mitigate this type of degradation. Moreover, their effect depends on their chemical and mineralogical composition and also on the cement content replacement ratio. Glass is a common material with some environmental problems regarding recycling and landfilling. Some studies exist about its use as fine powder, like a pozzolan, in cement-based materials. However, there are also some problems related to its use as coarse aggregate in cement–based materials due to ASR development. This paper presents the results obtained in mortars exposed to 1M NaOH solution prepared with crushed glass as aggregate and as addition in cement substitution. The results reveal that ASR is reduced with the incorporation of glass as aggregate or addition, and its efficiency depends on its replacement content.
URI: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1002099
Appears in Collections:DM/NMM - Comunicações a congressos e artigos de revista

Files in This Item:
File Description SizeFormat 
Serpa_resumo_Materiais2011.pdf12.03 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.