test Browse by Author Names Browse by Titles of Works Browse by Subjects of Works Browse by Issue Dates of Works
       

Advanced Search
Home   
 
Browse   
Communities
& Collections
  
Issue Date   
Author   
Title   
Subject   
 
Sign on to:   
Receive email
updates
  
My Account
authorized users
  
Edit Profile   
 
Help   
About T-Space   

T-Space at The University of Toronto Libraries >
School of Graduate Studies - Theses >
Master >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/24643

Title: Electromagnetic Characterization of Cemented Paste Backfill in the Field and Laboratory
Authors: Thottarath, Sujitlal
Advisor: Grabinsky, Murray
Department: Civil Engineering
Keywords: Cemented Paste Backfill
electromagnetic waves
dielectric permittivity
electrical conductivity
capacitance probes
ECH2O-TE
Issue Date: 28-Jul-2010
Abstract: Cemented Paste Backfill (CPB) is a relatively new backfilling technology for which a better understanding of binder hydration is required. This research uses electromagnetic (EM) wave-based techniques to non-destructively study a CPB consisting of tailings, sand, process water and binder (90% blast-furnace slag; 10% Portland cement). EM experiments were performed using a broadband network analyzer (20 MHz to 1.3 GHz) in the lab and capacitance probes (70 MHz) in the lab and field. Results showed that the EM properties are sensitive to curing time, operating frequency and specimen composition including binder content. The volumetric water content interpreted from dielectric permittivity varied little with curing. Temporal variations in electrical conductivity reflected the different stages of hydration. Laboratory results aided interpretation of field data and showed that a reduction in binder content from 4.5% to 2.2% delays setting of CPB from 0.5 days to over 2 days, which has important implications for mine design.
URI: http://hdl.handle.net/1807/24643
Appears in Collections:Master
Department of Civil Engineering - Master theses

Files in This Item:

File Description SizeFormat
Thottarath_Sujitlal_201006_MASc_thesis.pdf2.96 MBAdobe PDF
View/Open

Items in T-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

uoft