Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU143755" target="_blank" >RIV/00216305:26110/19:PU143755 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3846/mbmst.2019.022" target="_blank" >https://doi.org/10.3846/mbmst.2019.022</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3846/mbmst.2019.022" target="_blank" >10.3846/mbmst.2019.022</a>

Result language

angličtina

Original language name

Degree of MWCNT suspension dispersity and its influence on rheology of cement pastes

Original language description

Modification of cement pastes by MWCNT (multi-walled carbon nanotubes) suspension enables to manage by their rheological properties due to the nanometer size of MWCNT. Dispersity degree of MWCNT suspension may be determined by the number of factors such as type and intensity of homogenization equipment, duration of homogenization and some other. The aim of present research consists in the establishment of optimal methodology of MWCNT suspension homogenization and investigation of dependence between dispersity degree of MWCNT suspension and rheological properties of cement pastes with that suspension. Two types of homogenization methods of MWCNT were tested such as ultrasonication and homogenization based on rotor-stator principle. The ultrasonication treatment about 6 min was established as optimal homogenization technique in the course of the current research. The yield stress and plastic viscosity of cement paste modified by MWCNT suspension increased in comparison with cement paste modified by polycarboxylate ether plasticizer (PCE) in 5 and 30 min after cement pastes mixing.Time of ultrasonication of MWCNT suspension more than 6 min did not have the influence on rheological behaviour of cement pastes.Addition of MWCNT decreased the volume coefficient of water bleeding of cement paste with PCE by 18%.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Article name in the collection

13TH INTERNATIONAL CONFERENCE MODERN BUILDING MATERIALS, STRUCTURES AND TECHNIQUES (MBMST 2019)

ISBN

978-609-476-197-3

ISSN

2029-9915

e-ISSN

—

Number of pages

9

Pages from-to

166-174

Publisher name

VILNIUS GEDIMINAS TECHNICAL UNIV PRESS, TECHNIKA

Place of publication

Vilnius, LITHUANIA

Event location

Vilnius

Event date

May 16, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000661870600024