<div class="csl-bib-body">
<div class="csl-entry">Shahid, M., Pichler, B., & Robisson, A. (2024, April 26). <i>Understanding the eight-channel isothermal calorimeter and its outcomes</i> [Conference Presentation]. 2nd INTERNATIONAL STUDENTS CONFERENCE OF CIVIL ENGINEERING - ISCCE 2024, Kosovo. http://hdl.handle.net/20.500.12708/210662</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/210662
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dc.description.abstract
An isothermal calorimeter is typically used to measure the heat production associated with cement hydration on a sample maintained at a constant temperature. The produced heat is considered proportional to the reaction rate. Therefore, the degree of hydration of a cement paste can be precisely tracked as a function of time. In this study, we first aimed to understand the limitations of the instrument. In particular, we focused on the isothermal assumption by studying the effects of heat capacity and initial temperature differences of the reference and studied samples, that play a role at early time. Next, cement pastes were tested. Both in-situ and external mixing protocols were adopted, and heat flow measurements were monitored for cement pastes prepared at initial water-to-cement mass ratios (w/c) of 0.35, 0.40, 0.42, 0.45, and 0.55. The first peak appeared immediately after the cement was mixed with water. The second peak appeared at about 6 to 9 hours. The initial water-to-cement mass ratio influenced the time of the second value of peak heat flow. At w/c=0.35, the time was shorter than that at w/c=0.55. Finally, we recommend a protocol that reduces the influence of thermal disturbances, including guidance for sample loading and heat capacity matching.
en
dc.language.iso
en
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dc.subject
heat capacity.
en
dc.subject
Iso-thermal calorimetry
en
dc.subject
cement hydration
en
dc.subject
thermal process
en
dc.title
Understanding the eight-channel isothermal calorimeter and its outcomes
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchTopic.id
M2
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E202-03 - Forschungsbereich Baustatik und experimentelle Mechanik
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tuw.publication.orgunit
E207-01 - Forschungsbereich Baustofflehre und Werkstofftechnologie
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tuw.author.orcid
0000-0002-6468-1840
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tuw.author.orcid
0000-0002-2434-6175
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tuw.event.name
2nd INTERNATIONAL STUDENTS CONFERENCE OF CIVIL ENGINEERING - ISCCE 2024
en
tuw.event.startdate
25-04-2024
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tuw.event.enddate
27-04-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.country
XK
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tuw.event.presenter
Shahid, Muhammad
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wb.sciencebranch
Bauingenieurwesen
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch
Werkstofftechnik
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wb.sciencebranch.oefos
2011
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.oefos
2050
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wb.sciencebranch.value
50
-
wb.sciencebranch.value
25
-
wb.sciencebranch.value
25
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item.languageiso639-1
en
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item.openairetype
conference paper not in proceedings
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item.grantfulltext
none
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item.fulltext
no Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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crisitem.author.dept
E202 - Institut für Mechanik der Werkstoffe und Strukturen
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crisitem.author.dept
E202-03 - Forschungsbereich Baustatik und experimentelle Mechanik
