Title page for ETD etd-07082005-135427


Document Type Master's Dissertation
Author Pretorius, Jan Hendrik Christoffel
URN etd-07082005-135427
Document Title The influence of PFA particle size on the workability of cementitious pastes
Degree MSc (Transportation)
Department Civil and Biosystems Engineering
Supervisor
Advisor Name Title
Prof E P Kearsley
Keywords
  • particle size determination
  • cement composites
  • fly ash
Date 2003-04-01
Availability unrestricted
Abstract
In this dissertation the effects of different types of Pulverized Fuel Ash (PF A)-types on the workability of cementitious pastes containing relative large amounts of PF A were investigated. The different types of PF A were produced at the same source thus they were chemically similar but differed in terms of average particle size and size distribution (grading). By using a two-point measurement technique based on flow through a J-shaped tube it was possible to detect relative small differences in workability between pastes. It was found and concluded that the different types of PFA had a significant effect on the workability of pastes containing cement and PFA as well as PF A alone.

The physical differences between the PF A-types were quantified and their effects on workability investigated. It was concluded that PF A with a broader particle size distribution range produced pastes with higher workability at constant water content. It was found that compressive strength as measured after 28 days were solely a function of the water/cementitious ratio for the curing regime employed. It was concluded that for curing conditions used the type of PF A used could have a significant effect on compressive strength when constant workability is required.

2002, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.

Please cite as follows:

Pretorius, JHC 2002, The influence of PFA particle size on the workability of cementitious pastes, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-07082005-135427/ >

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