Polymer repair products containing fly ash contaminated by denitrification process

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F21%3APU138492" target="_blank" >RIV/00216305:26110/21:PU138492 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0950061820326465" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0950061820326465</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2020.120641" target="_blank" >10.1016/j.conbuildmat.2020.120641</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polymer repair products containing fly ash contaminated by denitrification process

Popis výsledku v původním jazyce

The increase in the emphasis on the quality and long life of buildings and structures opens space for the development of new and progressive renovation materials. Current trends focus on using the by-products of thermal powerplants, fly ash (FA), produced by the combustion of pulverised coal, which is contaminated by the denitrification of the fumes. Because ammonia escapes from the concrete containing contaminated fly ash, further use of the fly ash in concrete or as a partial cement replacement is problematic. The most advantageous use of FA seems to be as a filler in polymerous materials. For this reason, this paper focuses on verifying new ways of using FA as a filler in polymer mortars and concretes, which are then used as structural and non-structural repair products and systems, according to the European Standard EN 1504–1. By studying four different types of FA, we found that FA, neither from high-temperature combustion nor fluid, contaminated by flue gas denitrification process does not deteriorate the properties of epoxy resin polymer repair products. Successful use of these by-products was proved by comparing the results of the physical and mechanical parameters of the polymer mortars containing contaminated FA with the reference polymer mortars containing only primary raw materials and polymer mortars with FA unaffected by the denitrification process. Computed tomography (CT) was used to analyse the microstructure and bond strength of the developed materials to underlying concrete surface; it was also confirmed that weather does not degrade the developed materials. Scanning electron microscopy (SEM) supported by dispersion spectral analysis proved that distribution of individual elements of filler in the developed repair products is even and FA particles were successfully incorporated in the enclosed structure of the polymer matrix. New materials are economically beneficial because a large amount of by-products are used in their composition (up to 60% by

Název v anglickém jazyce

Polymer repair products containing fly ash contaminated by denitrification process

Popis výsledku anglicky

The increase in the emphasis on the quality and long life of buildings and structures opens space for the development of new and progressive renovation materials. Current trends focus on using the by-products of thermal powerplants, fly ash (FA), produced by the combustion of pulverised coal, which is contaminated by the denitrification of the fumes. Because ammonia escapes from the concrete containing contaminated fly ash, further use of the fly ash in concrete or as a partial cement replacement is problematic. The most advantageous use of FA seems to be as a filler in polymerous materials. For this reason, this paper focuses on verifying new ways of using FA as a filler in polymer mortars and concretes, which are then used as structural and non-structural repair products and systems, according to the European Standard EN 1504–1. By studying four different types of FA, we found that FA, neither from high-temperature combustion nor fluid, contaminated by flue gas denitrification process does not deteriorate the properties of epoxy resin polymer repair products. Successful use of these by-products was proved by comparing the results of the physical and mechanical parameters of the polymer mortars containing contaminated FA with the reference polymer mortars containing only primary raw materials and polymer mortars with FA unaffected by the denitrification process. Computed tomography (CT) was used to analyse the microstructure and bond strength of the developed materials to underlying concrete surface; it was also confirmed that weather does not degrade the developed materials. Scanning electron microscopy (SEM) supported by dispersion spectral analysis proved that distribution of individual elements of filler in the developed repair products is even and FA particles were successfully incorporated in the enclosed structure of the polymer matrix. New materials are economically beneficial because a large amount of by-products are used in their composition (up to 60% by

Druh

J_imp - Článek v periodiku v databázi Web of Science

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/FV20303" target="_blank" >FV20303: Progresivní polymerní hmoty s využitím druhotných surovin a nebezpečných odpadů do chemicky silně agresivního prostředí</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Construction and building materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

267

Číslo periodika v rámci svazku

120641

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000604573000012

EID výsledku v databázi Scopus

2-s2.0-85092536308