Use of Lightweight Sintered Fly Ash Aggregates in Concrete at High Temperatures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU146399" target="_blank" >RIV/00216305:26110/22:PU146399 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-5309/12/12/2090" target="_blank" >https://www.mdpi.com/2075-5309/12/12/2090</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/buildings12122090" target="_blank" >10.3390/buildings12122090</a>

Result language

angličtina

Original language name

Use of Lightweight Sintered Fly Ash Aggregates in Concrete at High Temperatures

Original language description

This study addresses the issue of the resistance to high temperatures of lightweight concrete lightweighted with sintered fly ash aggregate. Lightweight concretes with different amounts of lightweighting and their properties after loading temperatures of 600, 800 and 1000 °C were investigated. In particular, the effect of high temperature on the mechanical properties of the concrete was determined on the test specimens, and the effect on the microstructure was investigated by X-ray diffraction analysis and scanning electron microscopy. It was found that there is an increase in compressive strength between 0 and 21% up to 800 °C, where the increase in strength decreases with increasing degree of lightening. At 1000 °C, the internal structure of the lightweight concrete destabilized, and the compressive strength decreased in the range of 51–65%. After loading at 1000 °C, the scanning electron microscope showed the formation of spherical-shaped neoplasms, which significantly reduced the internal integrity of the cement matrix in the lightweight concrete due to the increase in their volume. It was found that the lightweight concretes with higher lightweighting showed significantly less degradation due to higher temperature.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA21-25813S" target="_blank" >GA21-25813S: Study of the influence of organic fibers on the properties of cement composites under extreme loading</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Name of the periodical

Buildings

ISSN

2075-5309

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

„“-„“

UT code for WoS article

000900497200001

EID of the result in the Scopus database

2-s2.0-85144853756