Micromechanical characteristics of high-performance concrete subjected to modifications of composition and homogenization
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00337044" target="_blank" >RIV/68407700:21110/20:00337044 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.18720/MCE.94.12" target="_blank" >https://doi.org/10.18720/MCE.94.12</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.18720/MCE.94.12" target="_blank" >10.18720/MCE.94.12</a>
Alternative languages
Result language
angličtina
Original language name
Micromechanical characteristics of high-performance concrete subjected to modifications of composition and homogenization
Original language description
The paper deals with the effect of various modifications of composition and homogenization procedure on micromechanical characteristics of high-performance concrete (HPC) containing supplementary cementitious materials (SCMs), namely silica fume, fly ash and metakaolin. The main motivation was to characterize the changes of microstructure induced by the type and amount of SCMs, by the time and order of mixing of components and by coarse aggregate washing. The effects of the changes of microstructure on macroscopic mechanical features of the material were also studied. Indentation moduli of particular phases of the material were measured by nanoindentation. Interfacial transition zone (ITZ) thickness was primarily measured by nanoindentation. An alternative method of ITZ thickness determination based on variations in chemical composition was tested for a selected sample with encouraging result. Compressive strength and bulk elastic modulus of concrete were determined by standard loading tests. The results showed that SCMs generally decrease the thickness of ITZ, but no direct relation to compressive strength of concrete was found for mixtures with variable SCMs content. In case of mixtures with optimized SCMs content prepared by different homogenization procedures or with the use of aggregate washing, qualitative dependence between ITZ thickness and compressive strength was found. Aggregate washing proved to be useful for improving both microscopic and macroscopic properties, having positive effect on ITZ thickness, compressive strength, bulk elastic modulus and indentation moduli of particular phases.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/GA17-19463S" target="_blank" >GA17-19463S: Analysis of the relations between the microstructure and macroscopic properties of ultra-high performance concretes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Magazine of Civil Engineering
ISSN
2071-4726
e-ISSN
2071-0305
Volume of the periodical
2
Issue of the periodical within the volume
94
Country of publishing house
RU - RUSSIAN FEDERATION
Number of pages
13
Pages from-to
145-157
UT code for WoS article
000593142500012
EID of the result in the Scopus database
2-s2.0-85083832044