Pozzolanic activity of sewage sludge ash with respect to its calcination and chemical composition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43918378" target="_blank" >RIV/60461373:22310/17:43918378 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.5593/sgem2017/62/S26.045" target="_blank" >http://dx.doi.org/10.5593/sgem2017/62/S26.045</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2017/62/S26.045" target="_blank" >10.5593/sgem2017/62/S26.045</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pozzolanic activity of sewage sludge ash with respect to its calcination and chemical composition

Popis výsledku v původním jazyce

The handling and disposal of voluminous sludge produced from water treatment plants poses difficulty to environmental scientist and engineers. In fact, its environmental friendly management and disposal is challenging task and requires careful consideration. In this study, sewage sludge ashes were examined as potentially supplementary cementitious materials. The raw sewage sludge was provided by two different municipal waste water treatment plants, coming from Poland and Greece respectively. The calcination of preliminary dried sewage sludge was done at 700 °C in order to remove organic matter that would negatively affect setting and hardening of cement blends. For both raw and thermally treated materials, chemical composition was studied using XRF. The morphology of sewage sludge ash was characterized by SEM and mineralogical composition was evaluated by XRD analyses. Calcination process was monitored by STA. The pozzolanic activity was analyzed by Frattini test and measurement of strength activity index of cement pastes, where sewage sludge substituted 10 % of Portland cement by mass. The both analyzed ashes contained silica, alumina, calcium and iron oxides in significant amounts. The high amorphous content resulted in a good pozzolanic activity and high strength activity index.

Název v anglickém jazyce

Pozzolanic activity of sewage sludge ash with respect to its calcination and chemical composition

Popis výsledku anglicky

The handling and disposal of voluminous sludge produced from water treatment plants poses difficulty to environmental scientist and engineers. In fact, its environmental friendly management and disposal is challenging task and requires careful consideration. In this study, sewage sludge ashes were examined as potentially supplementary cementitious materials. The raw sewage sludge was provided by two different municipal waste water treatment plants, coming from Poland and Greece respectively. The calcination of preliminary dried sewage sludge was done at 700 °C in order to remove organic matter that would negatively affect setting and hardening of cement blends. For both raw and thermally treated materials, chemical composition was studied using XRF. The morphology of sewage sludge ash was characterized by SEM and mineralogical composition was evaluated by XRD analyses. Calcination process was monitored by STA. The pozzolanic activity was analyzed by Frattini test and measurement of strength activity index of cement pastes, where sewage sludge substituted 10 % of Portland cement by mass. The both analyzed ashes contained silica, alumina, calcium and iron oxides in significant amounts. The high amorphous content resulted in a good pozzolanic activity and high strength activity index.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA17-02815S" target="_blank" >GA17-02815S: Výzkum a vývoj vysokohodnotných kompozitů obsahujících popílek z biomasy</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

ISBN

—

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

7

Strana od-do

343-349

Název nakladatele

SGEM International Multidisciplinary Scientific Geoconference

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

29. 6. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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