Effects of Wet Separated and High Speed Milling Fly Ash Added in High Volume to Cementitious Materials
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00340992" target="_blank" >RIV/68407700:21110/20:00340992 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3311/PPci.14846" target="_blank" >https://doi.org/10.3311/PPci.14846</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3311/PPci.14846" target="_blank" >10.3311/PPci.14846</a>
Alternative languages
Result language
angličtina
Original language name
Effects of Wet Separated and High Speed Milling Fly Ash Added in High Volume to Cementitious Materials
Original language description
In this research high speed milling was carried out on particles of brown coal raw fly ash, on second layer, and on third layer particles obtained from wet separation of brown coal raw fly ash. Due to milling process, median particle size d(50) of raw fly ash, second layer, and third layer reduced by 46 %, 23 %, and 77 %, densities reduced by 11 %, 17 %, and 8 % respectively. Due to milling process, formation of agglomerations was observed, the standard deviation of the chemical composition of each element from the mean value reduced. After milling, high volume cementitious paste mixes were prepared with 60 % cement replacement. Due to the milling process the increase in compressive strength at 28 and 90 days was observed for raw fly ash is 59 % and 16 %, for second layer is 12 % and 15 %, for third layer and milled third layer is 78 % and 75 %. Flexural strength testing showed that due to the milling process the deflections at maximum loads have reduced considerably leading to brittle behavior of milled cementitious specimens. The testing for Mercury Intrusion Porosimetry showed that the cementitious specimens of third layer have maximum concentration of large capillary pores between 0.05 and 10 mu m, whereas, all others have maximum concentration of medium capillary pores between 0.01 and 0.05 mu m. Autogenous shrinkage of cementitious specimens was measured for first sixteen hours after mixing which showed that the second layer particles have the least shrinkage as compared to all other specimens.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/TE01020168" target="_blank" >TE01020168: Centre for Effective and Sustainable Transport Infrastructure (CESTI)</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
Periodica Polytechnica-Civil Engineering
ISSN
0553-6626
e-ISSN
1587-3773
Volume of the periodical
64
Issue of the periodical within the volume
1
Country of publishing house
HU - HUNGARY
Number of pages
20
Pages from-to
81-100
UT code for WoS article
000514834600009
EID of the result in the Scopus database
2-s2.0-85079900615