Potential of industrial waste as alternative alkaline activator for development of eco-efficient mortars

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00361177" target="_blank" >RIV/68407700:21110/23:00361177 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.cscm.2022.e01716" target="_blank" >https://doi.org/10.1016/j.cscm.2022.e01716</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cscm.2022.e01716" target="_blank" >10.1016/j.cscm.2022.e01716</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Potential of industrial waste as alternative alkaline activator for development of eco-efficient mortars

Popis výsledku v původním jazyce

The alkali-activated materials (AAMs) design can be viewed as one of the most investigated fields in building materials engineering. However, despite numerous studies aimed at the utilization of various precursors, very limited attention is paid to the utilization of waste alkali sources as an alternative to commercial activators. In this regard, this study provides a novel approach to the utilization of industrial waste alkalis as a replacement for commercial alkali activators to reduce costs and reduce the environmental burden. The main innovation consists in the utilization of a waste-cleaning solution (SWCA) as an alternative alkaline activator for blast furnace slag to improve environmental and economic efficiency and preserve functional properties. The functional properties of designed alkali-activated mortars are described by the setting time, pore size distribution, and mechanical strength. To comply with sustainable measures, the carbon dioxide emissions and costs analysis associated with the material production are carried out. The obtained results reveal the great potential of waste alkaline sources as a replacement for commercial activators. The increase in the applied SWCA concentration induced a shortening in the initial setting time from 240 to 120 minutes and the final setting time from 480 to 245 minutes. The designed mixtures reached a satisfactory level of mechanical strength (25 MPa) in comparison to low-grade cement mortars together with a substantial reduction in environmental burden excluding the avoided production. Specifically, a carbon footprint of 75 kg/m3 CO2 equivalent was achieved which represents 5 times lower values compared to low-grade concrete and even better value than AAMs based on a commercially-produced activator. Significant improvements were achieved also in cost efficiency per cubic meter as it was dropped to approx 40 /m3, thus designed alkali-activated mortars provide better cost efficiency per cubic meter over traditional binders. The findings show that AAMs based on waste alkaline activator should of particular attention to materials science as lowers the consumption of energy-intensive sources and represent a valuable step toward a circular economy.

Název v anglickém jazyce

Potential of industrial waste as alternative alkaline activator for development of eco-efficient mortars

Popis výsledku anglicky

The alkali-activated materials (AAMs) design can be viewed as one of the most investigated fields in building materials engineering. However, despite numerous studies aimed at the utilization of various precursors, very limited attention is paid to the utilization of waste alkali sources as an alternative to commercial activators. In this regard, this study provides a novel approach to the utilization of industrial waste alkalis as a replacement for commercial alkali activators to reduce costs and reduce the environmental burden. The main innovation consists in the utilization of a waste-cleaning solution (SWCA) as an alternative alkaline activator for blast furnace slag to improve environmental and economic efficiency and preserve functional properties. The functional properties of designed alkali-activated mortars are described by the setting time, pore size distribution, and mechanical strength. To comply with sustainable measures, the carbon dioxide emissions and costs analysis associated with the material production are carried out. The obtained results reveal the great potential of waste alkaline sources as a replacement for commercial activators. The increase in the applied SWCA concentration induced a shortening in the initial setting time from 240 to 120 minutes and the final setting time from 480 to 245 minutes. The designed mixtures reached a satisfactory level of mechanical strength (25 MPa) in comparison to low-grade cement mortars together with a substantial reduction in environmental burden excluding the avoided production. Specifically, a carbon footprint of 75 kg/m3 CO2 equivalent was achieved which represents 5 times lower values compared to low-grade concrete and even better value than AAMs based on a commercially-produced activator. Significant improvements were achieved also in cost efficiency per cubic meter as it was dropped to approx 40 /m3, thus designed alkali-activated mortars provide better cost efficiency per cubic meter over traditional binders. The findings show that AAMs based on waste alkaline activator should of particular attention to materials science as lowers the consumption of energy-intensive sources and represent a valuable step toward a circular economy.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA22-04726S" target="_blank" >GA22-04726S: Zhodnocení sladkovodních sedimentů pomocí alkalické aktivace</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Case Studies in Construction Materials

ISSN

2214-5095

e-ISSN

2214-5095

Svazek periodika

18

Číslo periodika v rámci svazku

e01716

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000951105800001

EID výsledku v databázi Scopus

2-s2.0-85147691017