Transport properties and multi-species modelling of slag based concrete


Lizarazo Marriaga, J.M.R. (2009) Transport properties and multi-species modelling of slag based concrete. Unpublished PhD Thesis. Coventry University


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Abstract

In this work, the chloride transport related properties of slag concrete have been studied. For this, traditional experiments and an innovative computational method were applied to novel mixes with a low carbon footprint. In part 1 combination of Ground Granulated Blast Furnace Slag and Steel Basic Oxygen Slag activated using ordinary Portland cement, waste cement industrial residues and recycled Plasterboard Gypsum were studied. In order to characterize these blended binders, the compressive strength, the volume stability, the mineralogical changes due to hydration and the setting times were measured. In part 2 the chloride penetration was simulated to study the transport properties using a multi-species model. In this, the ionic species flow is given by the Nernst– Planck equation; however, due to ion–ion interactions there are ionic fields that affect the final flux producing an additional voltage known as the membrane potential. In order to calculate the inputs of the model a neural network methodology was developed to find the fundamental properties of concrete including the diffusion coefficients In part 3 a range of traditional transport chloride related experimental tests were carried out on concrete mixtures developed in part 1. These tests were workability, compressive strength, open porosity, initial water absorption capacity (sorptivity), carbonation, chloride migration and self diffusion, electrical resistivity, water permeability, and corrosion. Additionally, the methods developed in part 2 were used to calculate the chloride transport related properties of those mixes.



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Item TypeThesis (PhD)
TitleTransport properties and multi-species modelling of slag based concrete
Authors Lizarazo Marriaga, J.M.R.
Uncontrolled Keywordsconcrete, slag-based concretes, cementitious binders, chlorides
Departments Engineering and Computing
Additional InformationA number of diagrams and tables have been removed for copyright reasons, including published articles from the appendices. Please consult the DVD or printed version in the Library.
Funding BodiesEuropean Union Programme of High Level Scholarship for Latin America, Universidad Nacional de Colombia - Departmento de Ingeneria Civil y Agricola
La Fundacion para el Futuro de Colombia - COLFUTURO
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Deposited on 18-Apr-2011 in Research - Coventry.
Last modified on 22-May-2015

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