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Transport of moisture and chlorides into sprayed concrete

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10.23967/dbmc.2020.141
 
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Aponte Hernández, Diego FernandoMés informacióMés informacióMés informació
Barra Bizinotto, MarildaMés informacióMés informacióMés informació
Valls del Barrio, SusannaMés informacióMés informacióMés informació
Fernández Carrasco, LucíaMés informacióMés informacióMés informació
Document typeConference report
Defense date2020
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
This contribution is a study of the durability and transport properties of sprayed concrete used in an actual construction site. It considers whether concrete spraying can generate different porosities as the thickness of the sprayed layer increases. The work consisted of a study of the properties of the interior and exterior concrete layers with a particular focus on chloride penetration. A few of the methodologies and techniques used are compressive strength at 28 days, depth of penetration of water under pressure UNE EN 12390-8, boiled absorption and volume of permeable voids ASTM C642, and accelerate chloride penetration NT BUILD 443. Calculated transport property values included absorption (A) and volume of permeable voids (VPV), porosity interconnection, and chloride diffusion coefficient (De). The conclusion obtained is that there are no significant differences between the physical microstructural properties of the interior and exterior sprayed concrete layers, they present a similar porosity, and behave in the same way under a chloride attack when test tubes are completely saturated.
CitationAponte, D.F. [et al.]. Transport of moisture and chlorides into sprayed concrete. A: International Conference on Durability of Building Materials and Components. "Current Topics and Trends on Durability of Building Materials and Components: proceedings of the XV edition of the International Conference on Durability of Building Materials and Components (DBMC 2020), Barcelona, Spain, 20-23 October 2020". 2020, p. 1657-1664. ISBN 978-84-121101-8-0. DOI 10.23967/dbmc.2020.141. 
URIhttp://hdl.handle.net/2117/336832
DOI10.23967/dbmc.2020.141
ISBN978-84-121101-8-0
Publisher versionhttps://congress.cimne.com/dbmc2020/frontal/Doc/EbookDBMC2020.pdf
Other identifiershttps://www.scipedia.com/public/Aponte_et_al_2020a
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