Experimental Investigation of the Chemical Shrinkage of the Cement Paste Based on the Calorimetric and Ultrasonic Measurement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU133534" target="_blank" >RIV/00216305:26110/19:PU133534 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Investigation of the Chemical Shrinkage of the Cement Paste Based on the Calorimetric and Ultrasonic Measurement

Popis výsledku v původním jazyce

The paper deals with the experimental investigation of the chemical shrinkage of hydraulic cement paste. The measurements were aimed at the determination of heat flow and hydration heat using the isothermal calorimetry and determination of the ultrasonic (US) pulse velocity using the test device based on the longitudinal waves measurement and equipped with the thermal sensor. The measurements were performed on the test specimens prepared from Portland cement CEM I 42.5R and water with w/c ratio of 0.40, 0.33 and 0.50. The chemical shrinkage was determined in compliance with the ASTM C1608-17. The main objective of the experiments was to find the relationships between the results obtained using the above mentioned testing techniques. The pilot results show the close relationship between the heat flow, evolution of the internal temperature measured inside the test specimen and US transit time determined by the continual measurement on the test specimen during early maturation. The results also indicate that the prediction of chemical shrinkage based on the US pulse velocity corresponds very closely with the experimental data. The results of performed measurements will be used for the specification of the correction factors in the shrinkage prediction models.

Název v anglickém jazyce

Experimental Investigation of the Chemical Shrinkage of the Cement Paste Based on the Calorimetric and Ultrasonic Measurement

Popis výsledku anglicky

The paper deals with the experimental investigation of the chemical shrinkage of hydraulic cement paste. The measurements were aimed at the determination of heat flow and hydration heat using the isothermal calorimetry and determination of the ultrasonic (US) pulse velocity using the test device based on the longitudinal waves measurement and equipped with the thermal sensor. The measurements were performed on the test specimens prepared from Portland cement CEM I 42.5R and water with w/c ratio of 0.40, 0.33 and 0.50. The chemical shrinkage was determined in compliance with the ASTM C1608-17. The main objective of the experiments was to find the relationships between the results obtained using the above mentioned testing techniques. The pilot results show the close relationship between the heat flow, evolution of the internal temperature measured inside the test specimen and US transit time determined by the continual measurement on the test specimen during early maturation. The results also indicate that the prediction of chemical shrinkage based on the US pulse velocity corresponds very closely with the experimental data. The results of performed measurements will be used for the specification of the correction factors in the shrinkage prediction models.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-14302S" target="_blank" >GA17-14302S: Experimentální analýza objemových změn cementových kompozitů v raném stádiu tuhnutí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

FIB 2018 - Proceedings for the 2018 fib Congress: Better, Smarter, Stronger

ISBN

978-1-877040-15-3

ISSN

2617-4820

e-ISSN

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Počet stran výsledku

8

Strana od-do

2482-2489

Název nakladatele

Federation Internationale du Beton (fib)

Místo vydání

neuveden

Místo konání akce

Melbourne

Datum konání akce

7. 10. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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