Feasibility of incorporating autoclaved aerated concrete waste for cement replacement in sustainable building materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27690%2F20%3A10244779" target="_blank" >RIV/61989100:27690/20:10244779 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0959652619343252?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0959652619343252?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jclepro.2019.119455" target="_blank" >10.1016/j.jclepro.2019.119455</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Feasibility of incorporating autoclaved aerated concrete waste for cement replacement in sustainable building materials

Popis výsledku v původním jazyce

Autoclaved aerated concrete waste (AACW) is a common low-strength cement-based construction and demolition waste, which is currently disposed by landfills and hard to be directly used as supplementary cementitious material. The present work proposed a potential approach incorporating AACW for cement substitution in sustainable building materials. Wet-milling technique was used to dispose and improve the fineness of AACW (median particle size, as low as 2.3 μm). It was proved that AACW is suitable for wet-milling treatment due to its porous texture and low-strength. The pH value and electrical conductivity of the AACW slurry was notably improved. Water requirement was increased by the ultrafine AACW. Both setting time and the main hydration heat location were obviously brought forward by ultrafine AACW, indicating its early hydration acceleration. Compressive strength of ultrafine AACW replaced cement pastes present higher or equivalent value compared with pure cement paste, within 30% replacement level. Pore structure was effectively refined by the ultrafine wet-milling AACW. It was proved that AACW could be efficiently used as an alternative cementitious material in cement and concrete after wet-milling treatment, thus bring environmental and economic benefits. (C) 2019 Elsevier Ltd

Název v anglickém jazyce

Feasibility of incorporating autoclaved aerated concrete waste for cement replacement in sustainable building materials

Popis výsledku anglicky

Autoclaved aerated concrete waste (AACW) is a common low-strength cement-based construction and demolition waste, which is currently disposed by landfills and hard to be directly used as supplementary cementitious material. The present work proposed a potential approach incorporating AACW for cement substitution in sustainable building materials. Wet-milling technique was used to dispose and improve the fineness of AACW (median particle size, as low as 2.3 μm). It was proved that AACW is suitable for wet-milling treatment due to its porous texture and low-strength. The pH value and electrical conductivity of the AACW slurry was notably improved. Water requirement was increased by the ultrafine AACW. Both setting time and the main hydration heat location were obviously brought forward by ultrafine AACW, indicating its early hydration acceleration. Compressive strength of ultrafine AACW replaced cement pastes present higher or equivalent value compared with pure cement paste, within 30% replacement level. Pore structure was effectively refined by the ultrafine wet-milling AACW. It was proved that AACW could be efficiently used as an alternative cementitious material in cement and concrete after wet-milling treatment, thus bring environmental and economic benefits. (C) 2019 Elsevier Ltd

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/EF17_048%2F0007373" target="_blank" >EF17_048/0007373: Predikce poškození konstrukčních materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Cleaner Production

ISSN

0959-6526

e-ISSN

—

Svazek periodika

250

Číslo periodika v rámci svazku

250

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000508829800047

EID výsledku v databázi Scopus

2-s2.0-85078301066