Vše

Co hledáte?

Vše
Projekty
Výsledky výzkumu
Subjekty

Rychlé hledání

  • Projekty podpořené TA ČR
  • Významné projekty
  • Projekty s nejvyšší státní podporou
  • Aktuálně běžící projekty

Chytré vyhledávání

  • Takto najdu konkrétní +slovo
  • Takto z výsledků -slovo zcela vynechám
  • “Takto můžu najít celou frázi”

Experimental determination of ammonia in fly ash for ready-mix concrete

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F20%3A00345421" target="_blank" >RIV/68407700:21610/20:00345421 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/10.1063/5.0000478" target="_blank" >http://dx.doi.org/10.1063/5.0000478</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1063/5.0000478" target="_blank" >10.1063/5.0000478</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Experimental determination of ammonia in fly ash for ready-mix concrete

  • Popis výsledku v původním jazyce

    Production of concrete with the addition of power plant fly ash created during selective non-catalytic reduction of nitrogen oxides (SNCR), (reaction of reducing agents such as urea or ammonia water), during which ammonia with nitric oxide (NO) and nitrogen dioxide (NO2) are split; manipulation with the concrete, its placement, and subsequent ammonia emissions into the interior environment of buildings raise the question of risk by exceeding the hygienic limits for ammonia concentration in the atmosphere (CSN EN 4502-1 states in Article 5.4.2 “The fly ash shall not contain substances which, when released from the concrete, would be hazardous to health, hygiene and the environment”, which ammonia is). The question is, how high the ammonia concentrations in the air are, whether they are “dangerous to health, hygiene and the environment”. In addition to these questions, there are also technological questions, i.e. the quality of such fly ash in terms of its impact on the properties of fresh and hardened concrete. This results in uncertainty regarding the safe use of such fly ash by the concrete manufacturer. Ultimately, the use of such fly ash is being reduced, because the potential risk (absence of limits) in using fly ash as a partial cement substitute outweighs the potential savings resulting from the lower price of this pozzolanic admixture (which contaminated fly ash certainly still is). In 2016, new legislative measures regulating emission limits of produced flue gases [1] were introduced. Demands on the quality of produced flue gases have been constantly tightened in recent years, which is why mainly producers of electricity in coal-fired power units are forced to introduce additional greening technologies. The new legislation tightens the inspection of the production of nitrogen oxide emissions the most, which was completely out of interest in recent times.

  • Název v anglickém jazyce

    Experimental determination of ammonia in fly ash for ready-mix concrete

  • Popis výsledku anglicky

    Production of concrete with the addition of power plant fly ash created during selective non-catalytic reduction of nitrogen oxides (SNCR), (reaction of reducing agents such as urea or ammonia water), during which ammonia with nitric oxide (NO) and nitrogen dioxide (NO2) are split; manipulation with the concrete, its placement, and subsequent ammonia emissions into the interior environment of buildings raise the question of risk by exceeding the hygienic limits for ammonia concentration in the atmosphere (CSN EN 4502-1 states in Article 5.4.2 “The fly ash shall not contain substances which, when released from the concrete, would be hazardous to health, hygiene and the environment”, which ammonia is). The question is, how high the ammonia concentrations in the air are, whether they are “dangerous to health, hygiene and the environment”. In addition to these questions, there are also technological questions, i.e. the quality of such fly ash in terms of its impact on the properties of fresh and hardened concrete. This results in uncertainty regarding the safe use of such fly ash by the concrete manufacturer. Ultimately, the use of such fly ash is being reduced, because the potential risk (absence of limits) in using fly ash as a partial cement substitute outweighs the potential savings resulting from the lower price of this pozzolanic admixture (which contaminated fly ash certainly still is). In 2016, new legislative measures regulating emission limits of produced flue gases [1] were introduced. Demands on the quality of produced flue gases have been constantly tightened in recent years, which is why mainly producers of electricity in coal-fired power units are forced to introduce additional greening technologies. The new legislation tightens the inspection of the production of nitrogen oxide emissions the most, which was completely out of interest in recent times.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    20101 - Civil engineering

Návaznosti výsledku

  • Projekt

    <a href="/cs/project/TH02020690" target="_blank" >TH02020690: Betony s mimořádnou odolností vůči působení agresivních médií</a><br>

  • Návaznosti

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

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    SPECIAL CONCRETE AND COMPOSITES 2019: 16th International Conference

  • ISBN

    978-0-7354-1961-2

  • ISSN

    0094-243X

  • e-ISSN

    1551-7616

  • Počet stran výsledku

    5

  • Strana od-do

  • Název nakladatele

    AIP Conference Proceedings

  • Místo vydání

    New York

  • Místo konání akce

    Lísek, Bystřice nad Pernštejnem

  • Datum konání akce

    16. 10. 2019

  • Typ akce podle státní příslušnosti

    EUR - Evropská akce

  • Kód UT WoS článku

    000557821500024