Thermophysical parameters of MOC-based composite with fly ash admixture

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00343893" target="_blank" >RIV/68407700:21110/20:00343893 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.5.0033918" target="_blank" >https://doi.org/10.1063/5.5.0033918</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.5.0033918" target="_blank" >10.1063/5.5.0033918</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermophysical parameters of MOC-based composite with fly ash admixture

Popis výsledku v původním jazyce

Availability and advantageous functional properties of cement-based materials are together with their increasing demand main causes of huge depletion of natural resources and increased environmental burden. As alternative to Portland cement (PC), magnesium oxychloride cement (MOC) could be used in order to mitigate this enormous burden of the environment. Magnesium oxychloride cement is fire resistant non-hydraulic binder with high strength, lower environmental impact contrary to PC, and ability to bond high volume of fillers. In this paper, properties of MOC-based composites with silica sand and fly ash (FA) admixture in the form of partial sand substitution were studied. Fly ash coming from coal combustion was applied as 5% 10% and 15% volumetric replacement of sand. Chemical composition of raw materials was characterized using X-ray fluorescence technique (XRF). The effect of FA usage on basic structural, mechanical, and thermal properties of developed MOC-based composites was experimentally assessed. Due to application of MOC as fire protection material, thermophysical properties were tested at elevated temperatures using the hot disk method. The application of FA decreased total open porosity of material and flexural strength while compressive strength was preserved or increased. Results indicated that FA acted as inert filler in MOC-based matrix. Surprisingly, FA admixture also reduced volumetric heat capacity and thermal conductivity of material despite of lower porosity. Other decrease in investigated thermal parameters was caused by the thermal expansion and endothermic reactions when MOC was exposed to elevated temperatures. Based on experimental data, developed MOC composites with fly ash filler were considered as low-carbon and environmental friendly materials suitable for fire protection constructions.

Název v anglickém jazyce

Thermophysical parameters of MOC-based composite with fly ash admixture

Popis výsledku anglicky

Availability and advantageous functional properties of cement-based materials are together with their increasing demand main causes of huge depletion of natural resources and increased environmental burden. As alternative to Portland cement (PC), magnesium oxychloride cement (MOC) could be used in order to mitigate this enormous burden of the environment. Magnesium oxychloride cement is fire resistant non-hydraulic binder with high strength, lower environmental impact contrary to PC, and ability to bond high volume of fillers. In this paper, properties of MOC-based composites with silica sand and fly ash (FA) admixture in the form of partial sand substitution were studied. Fly ash coming from coal combustion was applied as 5% 10% and 15% volumetric replacement of sand. Chemical composition of raw materials was characterized using X-ray fluorescence technique (XRF). The effect of FA usage on basic structural, mechanical, and thermal properties of developed MOC-based composites was experimentally assessed. Due to application of MOC as fire protection material, thermophysical properties were tested at elevated temperatures using the hot disk method. The application of FA decreased total open porosity of material and flexural strength while compressive strength was preserved or increased. Results indicated that FA acted as inert filler in MOC-based matrix. Surprisingly, FA admixture also reduced volumetric heat capacity and thermal conductivity of material despite of lower porosity. Other decrease in investigated thermal parameters was caused by the thermal expansion and endothermic reactions when MOC was exposed to elevated temperatures. Based on experimental data, developed MOC composites with fly ash filler were considered as low-carbon and environmental friendly materials suitable for fire protection constructions.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/GA19-00262S" target="_blank" >GA19-00262S: Kompozity na bázi reaktivního hořečnatého cementu s vybranými příměsemi a aditivy</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Thermophysics 2020, 25th International Meeting

ISBN

978-0-7354-4041-8

ISSN

—

e-ISSN

0094-243X

Počet stran výsledku

5

Strana od-do

"020014-1"-"020014-5"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Smolenice

Datum konání akce

7. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—