Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.628881
Title: Transport properties and multi-species modelling of slag based concrete
Author: Lizarazo Marriaga, J. M. R.
Awarding Body: Coventry University
Current Institution: Coventry University
Date of Award: 2009
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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.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.628881  DOI: Not available
Keywords: concrete, slag-based concretes, cementitious binders, chlorides
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