Rheological and calorimetric characterization of the role of CaCl2 on Portland cement early hydration

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F16%3AN0000048" target="_blank" >RIV/26232511:_____/16:N0000048 - isvavai.cz</a>

Result on the web

<a href="https://www.researchgate.net/publication/306074385_Rheological_and_Calorimetric_Characterization_of_the_Role_of_CaCl2_on_Portland_Cement_Early_Hydration" target="_blank" >https://www.researchgate.net/publication/306074385_Rheological_and_Calorimetric_Characterization_of_the_Role_of_CaCl2_on_Portland_Cement_Early_Hydration</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.865.17" target="_blank" >10.4028/www.scientific.net/MSF.865.17</a>

Result language

angličtina

Original language name

Rheological and calorimetric characterization of the role of CaCl2 on Portland cement early hydration

Original language description

Paper describes a new way how to characterize early hydration and setting of Portland cement pastes with various dosages of setting accelerator CaCl2. The aim was not to characterize the role of well-known setting accelerator CaCl2 but to correlate rheology and calorimetry in view of early hydration of Portland cement. Characterization was based on measurements on rotational rheometer, isothermal calorimeter and semiadiabatic calorimeter. The courses of calorimetric exotherms in time were correlated to the development of the phase angle obtained by rheological oscillation tests. Heat flow peaks can be successfully correlated to rheological processes described by change of storage and elastic moduli up to the time that corresponds to the start of the setting which was found to be the limit for rheological tests. The start of the setting on calorimetric curve belongs to the onset point of the main silicate peak during acceleration period of hydration. The value of phase angle decreases as the setting cement paste changes from liquid to solid-like. Times of low values of phase angle ~ 2.5 (°) can be related to times of onset points of main peak for every dosage of setting accelerator.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JN - Civil engineering

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Materials Science Forum

ISSN

1662-9752

e-ISSN

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Volume of the periodical

2016

Issue of the periodical within the volume

865

Country of publishing house

CH - SWITZERLAND

Number of pages

5

Pages from-to

17 – 21

UT code for WoS article

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EID of the result in the Scopus database

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