Alkali Activation of High MgO BFS with Sodium Carbonate Added Dry Vs. Wet
New Generation of Construction Materials
Document identifier: oai:DiVA.org:ltu-76113
Keyword: Engineering and Technology,
Materials Engineering,
Other Materials Engineering,
Teknik och teknologier,
Materialteknik,
Annan materialteknik,
Alkali Activated Slag,
Blast Furnace Slag,
Alkali activation,
Sodium carbonate,
Byggmaterial,
Building MaterialsPublication year: 2019Relevant Sustainable Development Goals (SDGs):
The SDG label(s) above have been assigned by OSDG.aiAbstract: The use of sodium carbonate to alkali activate blast furnace slag has several advantages over the typically used sodium silicate, including for example easier, safer handling and less negative environmental impacts. In this study, sodium carbonate (SC)-activated blast furnace slag (BFS) pastes and concretes were produced using a high MgO content BFS activated with 3, 5, 10 and 14 wt.% (by binder) of SC. The activator was added either as a dry powder or dissolved in water one hour before mixing. The setting time, workability and compressive strength after 1,7 and 28 days were determined. Concrete cubes were cured in two setups: sealed specimens at 65 ˚C for 24 hours followed by storage at laboratory conditions (20±2˚C), or simply sealed storage at laboratory conditions (20±2˚C and 50-55% RH), until testing. The results showed that, increasing the dosage of SC decreases the initial and the final setting time regardless of whether the mixing procedure was dry or wet. However, addition of the SC dissolved in water increased the slump at higher SC dosage, while increasing addition of the dry SC resulted in a lower slump. A higher dose of SC increased the 28d compressive strength when added as a dry powder or wet, with higher values in laboratory curing compared with heat curing.
Authors
Abeer M. Humad
Luleå tekniska universitet; Byggkonstruktion och brand; Civil Engineering Department, Universityof Babylon, Iraq
Other publications
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John L. Provis
Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
Other publications
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Andrzej Cwirzen
Luleå tekniska universitet; Byggkonstruktion och brand
Other publications
>>
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header:
identifier: oai:DiVA.org:ltu-76113
datestamp: 2021-05-11T23:04:21Z
setSpec: SwePub-ltu
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recordContentSource: ltu
recordCreationDate: 2019-09-25
identifier: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76113
titleInfo:
@attributes:
lang: eng
title: Alkali Activation of High MgO BFS with Sodium Carbonate Added Dry Vs. Wet
abstract: The use of sodium carbonate to alkali activate blast furnace slag has several advantages over the typically used sodium silicate including for example easier safer handling and less negative environmental impacts. In this study sodium carbonate (SC)-activated blast furnace slag (BFS) pastes and concretes were produced using a high MgO content BFS activated with 3 5 10 and 14 wt.% (by binder) of SC. The activator was added either as a dry powder or dissolved in water one hour before mixing. The setting time workability and compressive strength after 17 and 28 days were determined. Concrete cubes were cured in two setups: sealed specimens at 65 ˚C for 24 hours followed by storage at laboratory conditions (20±2˚C) or simply sealed storage at laboratory conditions (20±2˚C and 50-55% RH) until testing. The results showed that increasing the dosage of SC decreases the initial and the final setting time regardless of whether the mixing procedure was dry or wet. However addition of the SC dissolved in water increased the slump at higher SC dosage while increasing addition of the dry SC resulted in a lower slump. A higher dose of SC increased the 28d compressive strength when added as a dry powder or wet with higher values in laboratory curing compared with heat curing.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Materials Engineering
Other Materials Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Materialteknik
Annan materialteknik
@attributes:
lang: eng
topic: Alkali Activated Slag
@attributes:
lang: eng
topic: Blast Furnace Slag
@attributes:
lang: eng
topic: Alkali activation
@attributes:
lang: eng
topic: Sodium carbonate
@attributes:
lang: swe
authority: ltu
topic: Byggmaterial
genre: Research subject
@attributes:
lang: eng
authority: ltu
topic: Building Materials
genre: Research subject
language:
languageTerm: eng
genre:
conference/other
ref
note:
Published
3
ISBN för värdpublikation: 978-2-35158-223-7; 978-2-35158-218-3;
Finansiär: Iraqi Ministry of Higher Education and Scientific Research
name:
@attributes:
type: personal
authority: ltu
namePart:
Humad
Abeer M.
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Byggkonstruktion och brand
Civil Engineering Department Universityof Babylon Iraq
nameIdentifier:
abehum
0000-0002-5328-4073
@attributes:
type: personal
namePart:
Provis
John L.
role:
roleTerm: aut
affiliation: Department of Materials Science and Engineering University of Sheffield Sheffield UK
@attributes:
type: personal
authority: ltu
namePart:
Cwirzen
Andrzej
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Byggkonstruktion och brand
nameIdentifier:
andcwi
0000-0001-6287-2240
relatedItem:
@attributes:
type: host
genre: grantAgreement
name:
@attributes:
type: corporate
namePart: Luleå tekniska universitet
role:
roleTerm: fnd
identifier: 143103
@attributes:
type: host
titleInfo:
title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019)
subTitle: New Generation of Construction Materials
part:
extent:
start: 354
end: 361
@attributes:
type: series
titleInfo:
title: RILEM Proceedings
partNumber: pro128-1
originInfo:
dateIssued: 2019
publisher: Rilem publications
location:
url: http://ltu.diva-portal.org/smash/get/diva2:1354600/FULLTEXT01.pdf
accessCondition: gratis
physicalDescription:
form: electronic
typeOfResource: text