Next Article in Journal
Dynamic Morphological Changes Induced By GM1 and Protein Interactions on the Surface of Cell-Sized Liposomes
Next Article in Special Issue
Characterisation of Crevice and Pit Solution Chemistries Using Capillary Electrophoresis with Contactless Conductivity Detector
Previous Article in Journal
Mechanism of Generation of ZnO Microstructures by Microwave-Assisted Hydrothermal Approach
Previous Article in Special Issue
Kinetics of Corrosion Inhibition of Aluminum in Acidic Media by Water-Soluble Natural Polymeric Pectates as Anionic Polyelectrolyte Inhibitors
Open AccessArticle

Study of the Microstructure Evolution of Low-pH Cements Based on Ordinary Portland Cement (OPC) by Mid- and Near-Infrared Spectroscopy, and Their Influence on Corrosion of Steel Reinforcement

1
Institute for Construction Sciences Eduardo Torroja, IETcc-CSIC, Serrano Galvache 4, Madrid 28033, Spain
2
Programs Office, CSIC Delegation in Andalusia, Seville 41013, Spain
3
NIR/MIR Spectroscopy Unit, Central Service for Research Support (SCAI), University of Cordoba, Campus de Rabanales, Cordoba 14071, Spain
*
Author to whom correspondence should be addressed.
Materials 2013, 6(6), 2508-2521; https://doi.org/10.3390/ma6062508
Received: 9 April 2013 / Revised: 29 May 2013 / Accepted: 29 May 2013 / Published: 18 June 2013
(This article belongs to the Special Issue Corrosion Monitoring and Control)
Low-pH cements are designed to be used in underground repositories for high level waste. When they are based on Ordinary Portland Cements (OPC), high mineral admixture contents must be used which significantly modify their microstructure properties and performance. This paper evaluates the microstructure evolution of low-pH cement pastes based on OPC plus silica fume and/or fly ashes, using Mid-Infrared and Near-Infrared spectroscopy to detect cement pastes mainly composed of high polymerized C-A-S-H gels with low C/S ratios. In addition, the lower pore solution pH of these special cementitious materials have been monitored with embedded metallic sensors. Besides, as the use of reinforced concrete can be required in underground repositories, the influence of low-pH cementitious materials on steel reinforcement corrosion was analysed. Due to their lower pore solution pH and their different pore solution chemical composition a clear influence on steel reinforcement corrosion was detected. View Full-Text
Keywords: low-pH cements; hydration; microstructure; pH sensors; corrosion of steel reinforcements low-pH cements; hydration; microstructure; pH sensors; corrosion of steel reinforcements
Show Figures

Graphical abstract

MDPI and ACS Style

García Calvo, J.L.; Sánchez Moreno, M.; Alonso Alonso, M.C.; Hidalgo López, A.; García Olmo, J. Study of the Microstructure Evolution of Low-pH Cements Based on Ordinary Portland Cement (OPC) by Mid- and Near-Infrared Spectroscopy, and Their Influence on Corrosion of Steel Reinforcement. Materials 2013, 6, 2508-2521.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop