Effect of Sodium Chloride and Fibre-Reinforcement on the Durability of Sand–Coal Fly Ash–Lime Mixes Subjected to Freeze–Thaw Cycles

Effect of Sodium Chloride and Fibre-Reinforcement on the Durability of Sand–Coal Fly Ash–Lime... The use of industrial residues such as coal fly ash in earthworks is of great interest for geotechnical engineers, since it reduces the consumption of natural resources. In that sense, the use of sand–coal fly ash-hydrated lime has been vastly reported in the last years. The potential for increasing mechanical properties of such blends seems promising. Therefore, the addition of small quantities of NaCl and polypropylene fibres to sand–coal fly ash-hydrated lime mixtures is assessed in the present research in terms of unconfined compressive strength and durability to freeze–thaw exposure. Unconfined compressive tests showed that addition of NaCl seems more effective in enhancing strength of sand–fly ash–lime blends in comparison to fibre inclusions. On the other hand, the inclusion of fibres to the same blends provided a greater gain in durability respect to those specimens with NaCl. Both fibres and NaCl added separately, though, provided increase in strength and durability respect to mixtures without any fibres or NaCl. The improvement in engineering properties of sand–coal fly ash–lime blends provided by NaCl was found to be related to the formation of the phase thomsonite [NaCa2Al5Si4O20(6H2O)] and to the NaCl action as a catalyser. The enhancement caused by fibre inclusions, in turn, can be attributed to the fact that fibres inhibit water from expanding under low temperatures, therefore preventing cementitious bonds breakage. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geotechnical and Geological Engineering Springer Journals

Effect of Sodium Chloride and Fibre-Reinforcement on the Durability of Sand–Coal Fly Ash–Lime Mixes Subjected to Freeze–Thaw Cycles

Loading next page...
 
/lp/springer_journal/effect-of-sodium-chloride-and-fibre-reinforcement-on-the-durability-of-05eBIEVkTc
Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer International Publishing AG, part of Springer Nature
Subject
Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Terrestrial Pollution; Waste Management/Waste Technology; Civil Engineering
ISSN
0960-3182
eISSN
1573-1529
D.O.I.
10.1007/s10706-018-0594-8
Publisher site
See Article on Publisher Site

Abstract

The use of industrial residues such as coal fly ash in earthworks is of great interest for geotechnical engineers, since it reduces the consumption of natural resources. In that sense, the use of sand–coal fly ash-hydrated lime has been vastly reported in the last years. The potential for increasing mechanical properties of such blends seems promising. Therefore, the addition of small quantities of NaCl and polypropylene fibres to sand–coal fly ash-hydrated lime mixtures is assessed in the present research in terms of unconfined compressive strength and durability to freeze–thaw exposure. Unconfined compressive tests showed that addition of NaCl seems more effective in enhancing strength of sand–fly ash–lime blends in comparison to fibre inclusions. On the other hand, the inclusion of fibres to the same blends provided a greater gain in durability respect to those specimens with NaCl. Both fibres and NaCl added separately, though, provided increase in strength and durability respect to mixtures without any fibres or NaCl. The improvement in engineering properties of sand–coal fly ash–lime blends provided by NaCl was found to be related to the formation of the phase thomsonite [NaCa2Al5Si4O20(6H2O)] and to the NaCl action as a catalyser. The enhancement caused by fibre inclusions, in turn, can be attributed to the fact that fibres inhibit water from expanding under low temperatures, therefore preventing cementitious bonds breakage.

Journal

Geotechnical and Geological EngineeringSpringer Journals

Published: May 31, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off