Powtech, 27/9 - 29/9, Nuremberg, Germany. Leading trade fair for Powder & Bulk Solids Procssings & Analytics. Get Your Ticket Now!
Powtech, 27/9 - 29/9, Nuremberg, Germany. Leading trade fair for Powder & Bulk Solids Procssings & Analytics. Get Your Ticket Now!
Global Cement
Online condition monitoring experts for proactive and predictive maintenance - DALOG
Your Particulate and Gaseous pollution abatement partner - Thermax
  • Home
  • News
  • Conferences
  • Magazine
  • Directory
  • Reports
  • Members
  • Live
  • Login
  • Advertise
  • Knowledge Base
  • Alternative Fuels
  • Services
  • Jobs
  • Privacy & Cookie Policy
  • About
  • Register
  • Trial subscription
  • Contact
News University of Dundee study looks at fly ash moisture

University of Dundee study looks at fly ash moisture

Written by Global Cement staff 02 September 2019
  • Print

UK: A study by the University of Dundee has dispelled the myths of substantial performance differences between concretes made with cement containing dry or wet-stored fly ash, with comparable reinforcement corrosion between the two.

Vertical News has reported that the research, whose backers included the Department for Environment, Food & Rural Affairs and Heathrow Airport Holdings, was aimed at “quantifying moisture effects, which indicate agglomeration of fly ash and a tendency for this to increase with free lime content, storage period and temperature.”

Researchers tested five moistened fly ashes and samples from two power station stockpiles, and further investigated different material and storage variables, comparing the concretes at 75mm slump and 28 day strength. Air permeability and water absorption of moistened fly ash proved greater with high free lime (up to 0.9%) and lower with low free lime (to under 0.1%). What benefits there were improved with longer storage. The moistening of low-free-lime fly ash generally yielded similar, or slightly higher, carbonation and chlorine diffusion. The moisture caused little change in high-free-lime ash’s carbonation, while increasing chloride diffusion. Furthermore, high storage temperature equated to greater carbonation.

In spite of these intriguing chemical differences, the study concluded, "these didn't seem to have a noticeable effect on concrete resistance.”

Last modified on 04 September 2019
Published in Global Cement News
Tagged under
  • UK
  • Fly Ash
  • Study
  • GCW421

Register for the Global Cement Weekly email newsletter

Global Cement Weekly is Global Cement’s weekly email newsletter. Keep up to date with cement industry news, analysis, diary dates and news of people in the sector.

Register >

Related items

  • Doppelmayr Transport Technology supplies RopeCon ropeway conveyor for Aggregate Industries' Bardon Hill quarry restoration
  • Holcim Argentina achieves 50% ECOPact concrete deliveries
  • Breedon Group acquires Severn Sands
  • Breedon Group’s first half sales, earnings and profit rise in 2022
  • PGE Group to establish cement facility in Bełchatów
back to top
“AI
“Loesche
“Airscape
Acquisition Cemex China CO2 concrete coronavirus Export France Germany Government grinding plant HeidelbergCement Holcim Import India Lafarge LafargeHolcim Mexico Nigeria Pakistan Plant Product Production Results Russia Sales Sustainability UK Upgrade US
« August 2022 »
Mon Tue Wed Thu Fri Sat Sun
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31        



Sign up for FREE to Global Cement Weekly
Global Cement LinkedIn
Global Cement Facebook
Global Cement Twitter
  • Home
  • News
  • Conferences
  • Magazine
  • Directory
  • Reports
  • Members
  • Live
  • Login
  • Advertise
  • Knowledge Base
  • Alternative Fuels
  • Services
  • Jobs
  • Privacy & Cookie Policy
  • About
  • Register
  • Trial subscription
  • Contact
  • Conferences & Webinars >>
  • Global Ash
  • Global CemBoards
  • Global CemCCUS
  • Global CemEnergy
  • Global CemFuels
  • Global CemPower
  • Global CemProcess
  • Global CemProducer
  • Global Cement Quality Control
  • Global CemTrans
  • Global ConChems
  • Global Concrete
  • Global FutureCem
  • Global Gypsum
  • Global GypSupply
  • Global Insulation
  • Global Slag
  • Global Synthetic Gypsum
  • Global Well Cem
  • African Cement
  • Asian Cement
  • American Cement
  • European Cement
  • Middle Eastern Cement
  • Magazine >>
  • Latest issue
  • Articles
  • Editorial programme
  • Contributors
  • Link
  • Awards
  • Back issues
  • Subscribe
  • Photography
  • Register for free copies
  • The Last Word
  • Websites >>
  • Global Gypsum
  • Global Slag
  • Global CemFuels
  • Global Concrete
  • Global Insulation
  • Pro Global Media
  • PRoIDS Online
  • Social >>
  • LinkedIn
  • Facebook
  • Twitter

© 2022 Pro Global Media Ltd. All rights reserved.