Fired clay brick waste as low cost and eco-friendly pozzolana active filler in gypsum-based binders

Kód výsledku v IS VaVaI

RIV/68407700:21110/22:00358994 - isvavai.cz

Výsledek na webu

https://doi.org/10.1016/j.jclepro.2022.133142

DOI - Digital Object Identifier

10.1016/j.jclepro.2022.133142

Jazyk výsledku

angličtina

Název v původním jazyce

Fired clay brick waste as low cost and eco-friendly pozzolana active filler in gypsum-based binders

Popis výsledku v původním jazyce

A broader utilization of calcined gypsum in external applications remains limited mainly due to its high solubility in water. This drawback can be improved by combining it with supplementary cementitious materials and an activator of pozzolanic reactions (cement or lime). This paper aims to explore the feasibility of utilizing non-conventionally used fired clay brick waste, a by-product from brick production, to design gypsum-based binders with improved water resistance. A comprehensive study of the system consisting of calcined gypsum, fired clay brick waste, and lime was done from a microscopic (mineral composition, porosity development, and morphology) to macroscopic (basic physical and mechanical properties) point of view up to 90 days of age. Additionally, a simplified environmental study was conducted using the Life Cycle Assessment method. Amorphous phase and ettringite were the main hydration products. The mechanical tests revealed that the pozzolanic reactions caused by the addition of fired clay brick waste were delayed, which was reflected by a slow increase in strength within the studied period. Contrary to the reference binders, the compressive strength of the samples containing the lowest percentage of fired clay brick waste provided the most promising results even after 90 days of water curing. Considering that the newly designed ternary binders are prepared from low-cost and eco-friendly pozzolana active waste, the results presented in this study could help eliminate the disposal of fired clay brick waste and convert it into useful binder material suitable for green building rendering and restoration work of historical buildings.

Název v anglickém jazyce

Fired clay brick waste as low cost and eco-friendly pozzolana active filler in gypsum-based binders

Popis výsledku anglicky

A broader utilization of calcined gypsum in external applications remains limited mainly due to its high solubility in water. This drawback can be improved by combining it with supplementary cementitious materials and an activator of pozzolanic reactions (cement or lime). This paper aims to explore the feasibility of utilizing non-conventionally used fired clay brick waste, a by-product from brick production, to design gypsum-based binders with improved water resistance. A comprehensive study of the system consisting of calcined gypsum, fired clay brick waste, and lime was done from a microscopic (mineral composition, porosity development, and morphology) to macroscopic (basic physical and mechanical properties) point of view up to 90 days of age. Additionally, a simplified environmental study was conducted using the Life Cycle Assessment method. Amorphous phase and ettringite were the main hydration products. The mechanical tests revealed that the pozzolanic reactions caused by the addition of fired clay brick waste were delayed, which was reflected by a slow increase in strength within the studied period. Contrary to the reference binders, the compressive strength of the samples containing the lowest percentage of fired clay brick waste provided the most promising results even after 90 days of water curing. Considering that the newly designed ternary binders are prepared from low-cost and eco-friendly pozzolana active waste, the results presented in this study could help eliminate the disposal of fired clay brick waste and convert it into useful binder material suitable for green building rendering and restoration work of historical buildings.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

GA20-14506S: Metody pro zastavení hydratace cementu, vápna a sádry

Návaznosti

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

Rok uplatnění

2022

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

1879-1786

Svazek periodika

368

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

22

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85135723688