Microwave irradiation of alkali - activated metakaolin slurry

Barbara Horvat (Author), Branka Mušič (Author), Majda Pavlin (Author), Vilma Ducman (Author)

Abstract

The building and civil engineering industry generates more than 40% of man-caused carbon emissions, consumes a lot of energy just to produce building materials, generates a large amount of waste through construction and demolition, and consumes a large amount of natural resources. One of the possible solutions is to use alkali-activated materials, which can use waste instead of raw materials and are produced at lower temperatures, with less energy consumption and in less time than traditional building products. All of this lowers the carbon footprint, which could be further reduced by the timely-short implementation of microwave irradiation in the early stages of alkali-activation synthesis. Therefore, metakaolin activated with Na-water glass in a theoretically optimal ratio was irradiated with microwaves of 2.45 GHz at powers of 100 W and 1000 W for 1 min, and compared to non-irradiated reference cured only at room conditions. Samples prepared at higher power, i.e., 1000 W, solidified completely and foamed. TG-DTA was performed on all samples in the early stages of curing, mechanical strengths were measured on 3 and 28-day- old samples, and leaching tests on aged samples.

Keywords

metakaolin;alkalijsko aktivirani materiali;alkalijsko aktivirane pene;mikrovalovno obsevanje;odprti dostop;alkali activated material;alkali activated foams;microwave irradiation;open access;

Data

Language:	English
Year of publishing:	2023
Typology:	1.08 - Published Scientific Conference Contribution
Organization:	ZAG - Slovenian National Building and Civil Engineering Institute
Publisher:	University of Maribor, University Press, Faculty of Chemistry and Chemical Engineering
UDC:	620.1/.2
COBISS:	140428291
Parent publication:	5th International Conference on Technologies & Business Models for Circular Economy
Views:	12
Downloads:	3
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary keywords:	metakaolin;alkalijsko aktivirani materiali;alkalijsko aktivirane pene;mikrovalovno obsevanje;
Source comment:	Nasl. z nasl. zaslona; Opis vira z dne 2. 2. 2023;
Pages:	Str. 9-24
ID:	21304184