Macroscopic and Microscopic Properties of High Performance Concrete with Partial Replacement of Cement by Fly Ash

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00331814" target="_blank" >RIV/68407700:21110/19:00331814 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.292.108" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/SSP.292.108</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.292.108" target="_blank" >10.4028/www.scientific.net/SSP.292.108</a>

Result language

angličtina

Original language name

Macroscopic and Microscopic Properties of High Performance Concrete with Partial Replacement of Cement by Fly Ash

Original language description

The paper describes an experimental program focused on the research of high performance concrete with partial replacement of cement by fly ash. Four mixtures were investigated: reference mixture and mixtures with 10 %, 20 % and 30 % cement weight replaced by fly ash. In the first stage, the effect of cement replacement was observed. The second phase aimed at the influence of homogenization process for the selected 30% replacement on concrete properties. The analysis of macroscopic properties followed compressive strength, elastic modulus and depth of penetration of water under pressure. Microscopic analysis concentrated on the study of elastic modulus, porosity and mineralogical composition of cement matrix using scanning electron microscopy, spectral analysis and nanoindentation. The macroscopic results showed that the replacement of cement by fly ash notably improved compressive strength of concrete and significantly decreased the depth of penetration of water under pressure, while the improvement rate increased with increasing cement replacement (strength improved by 18 %, depth of penetration by 95 % at 30% replacement). Static elastic modulus was practically unaffected. Microscopic investigation showed impact of fly ash on both structure and phase mechanical performance of the material.

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

<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)

Publication year

2019

Confidentiality

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

Article name in the collection

25th Concrete Days 2018

ISBN

978-3-0357-1459-3

ISSN

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e-ISSN

1662-9779

Number of pages

6

Pages from-to

108-113

Publisher name

Trans Tech Publications

Place of publication

Curich

Event location

Praha

Event date

Nov 21, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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