Effects of potassium ferrocyanide used for desalination on lime composite performances in different curing regimes

D. Ergenç, J. Feijoo, Rafael Fort, Mónica Alvarez de Buergo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Negative effects of salt weathering on porous building materials will increase because of the global climate breakdown. The addition of crystallization modifiers as desalination technique has attracted considerable scholarly attention. This study builds on this body of knowledge by investigating the effects of potassium ferrocyanide addition on air-lime mortar under different environmental conditions. Three experimental setups were selected with different curing regimes: i) molding, ii) between sandstones and iii) between salt-laden sandstones. TGA-DSC, ion chromatography, MIP and SEM were conducted to evaluate the effects of ferrocyanide on the whole salt content, lime carbonation and mortar microstructure. Its efficiency/durability under salt exposure and wet conditions were also tested. The decay after salt crystallization cycles was evaluated by comparing air permeability, open porosity, water vapor permeability, capillary porosity, ultrasonic pulse velocity, surface hardness and roughness of samples before and after these cycles. Results showed that adding ferrocyanide improved the mortar performance in all curing regimes and its efficiency continued after capillary water uptake and salt attack.

Original languageEnglish
Article number120409
JournalConstruction and Building Materials
Volume259
DOIs
StatePublished - 30 Oct 2020

Bibliographical note

Funding Information:
The research was funded by TOP Heritage program (P2018/NMT-4372) of the Community of Madrid, CLIMORTEC project (BIA2014-53911-R) funded by the Ministry of Economy and Competitiveness of Spain and Juan de la Cierva grant of Dr. Jorge Feijoo by Spanish Government. The experiments were conducted in the Petrophysical Laboratory of IGEO; the authors acknowledge Dr. Carmen Vazquez for MIP measurements and Blanca Gallardo for IC measurements. Thanks continued to Ana Vicente and Angel Mazario Fernandez for SEM analyses performed at National Centre for Electron Microscopy (CNME), and Marta Furio for ESEM analysis in National Museum of Natural Sciences. The authors wish to acknowledge professional support of the Interdisciplinary Thematic Platform from CSIC Open Heritage: Research and Society (PTI-PAIS).

Funding Information:
The research was funded by TOP Heritage program ( P2018/NMT-4372 ) of the Community of Madrid , CLIMORTEC project ( BIA2014-53911-R ) funded by the Ministry of Economy and Competitiveness of Spain and Juan de la Cierva grant of Dr. Jorge Feijoo by Spanish Government. The experiments were conducted in the Petrophysical Laboratory of IGEO; the authors acknowledge Dr. Carmen Vazquez for MIP measurements and Blanca Gallardo for IC measurements. Thanks continued to Ana Vicente and Angel Mazario Fernandez for SEM analyses performed at National Centre for Electron Microscopy (CNME), and Marta Furio for ESEM analysis in National Museum of Natural Sciences. The authors wish to acknowledge professional support of the Interdisciplinary Thematic Platform from CSIC Open Heritage: Research and Society (PTI-PAIS).

Publisher Copyright:
© 2020 Elsevier Ltd

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Crystallization modifier
  • Damage mitigation
  • Desalination
  • Microstructure
  • Protection efficiency
  • Protective lime mortar

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