Invetigation of Moisture Exchange and Shrinkage of Concrete with Different Water-Cement Ratio

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00339215" target="_blank" >RIV/68407700:21110/19:00339215 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Invetigation of Moisture Exchange and Shrinkage of Concrete with Different Water-Cement Ratio

Original language description

The paper deals with characteristics of moisture transfer and shrinkage of concrete with respect to variable water-cement ratio and cement content. An experiment including four different concrete mixtures with water-cement ratio in the range 0,25-0,52 was conducted at the Faculty of Civil Engineering CTU in Prague in order to provide unique set of data containing measurements of moisture loss, pore relative humidity profiles, self-desiccation, drying shrinkage and autogenous shrinkage. Specimen types were chosen carefully with respect to quantities which were desired to be determined experimentally. Characteristic sizes of used specimens (cubes, cylinders, slabs) varied between 10 to 30 cm. Surfaces of these specimens not intended to dry were sealed with synthetic resin. Measurements were carried out for the period of 419 day in uncontrolled environment, where ambient temperature and relative humidity were recorded every 5 minutes by datalogger. Using the set of measured data, qualitative and quantitative relations were determined between: 1) moisture loss and drying shrinkage, 2) ultimate self-desiccation and water-cement ratio, 3) ultimate moisture loss and water-cement ratio, 4) parts of shrinkage (autogenous, drying, total) and water-cement ratio. Also, the dependencies of these quantities on cement content of individual mixtures are analysed as well. An explanation for recorded early-age swelling is stated considering hypothesis published recently in the literature.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2019

Confidentiality

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

Article name in the collection

CONCRETE Innovations in Materials, Design and Structures - Proceedings of the fib Symposium 2019

ISBN

978-2-940643-00-4

ISSN

2617-4820

e-ISSN

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Number of pages

6

Pages from-to

401-406

Publisher name

Fédération Internationale du Béton

Place of publication

Lausanne

Event location

Krakow

Event date

May 27, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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