Waste rubber incorporated in the alkali-activated metakaolin’s aluminosilicate network enhanced by microwave irradiation

Barbara Horvat (Author), Branka Mušič (Author)

Abstract

Building materials represent the possibility of prolonging the life of waste materials. The key is to ensure that the products are suitable for their function. So we activated metakaolin with the alkaline Na-silicate solution in the ratio that ensures the prevention of efflorescence and high mechanical strength (Horvat and Ducman, 2019). As the waste material (to be incorporated in the aluminosilicate network (ASN) of the alkali-activated metakaolin) ground waste rubber from electric cables was used in the preselected mass ratios. Its inclusion in products, like paving stones, can reduce stiffness, improve durability, dampen vibrations, and reduce road noise. The mechanical strengths of test samples with rubber present on the active surface or slightly below were higher compared to samples where rubber was encapsulated throughout the volume. Compressive strength was higher when samples were irradiated with low powers of microwaves while irradiation with higher powers led to the foaming of alkali-activated slurry. The encapsulation quality of the ground rubber was evaluated by SEM while the chemical influence on ASN was determined by EDS, FTIR, and XRD. Slipperiness change on the active surface of pavement stones proved that the addition of the ground rubber enhanced the walking safety of the product.

Keywords

sekundarne surovine;alkalijsko aktivirani materiali;odpadna guma;metakaolin;vgradnja organskih snovi v anorganskih;mikrovalovno obsevanje;tlačna trdnost;secondary raw material;alkali activated material;waste rubber;encapsulation of organic in inorganic material;microwave irradiation;mechanical strength;

Data

Language:	English
Year of publishing:	2024
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:	188459523
Parent publication:	6th International Conference on Technologies & Business Models for Circular Economy
Views:	23
Downloads:	11
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary keywords:	sekundarne surovine;alkalijsko aktivirani materiali;odpadna guma;metakaolin;vgradnja organskih snovi v anorganskih;mikrovalovno obsevanje;tlačna trdnost;
Source comment:	Nasl. z nasl. zaslona; Opis vira z dne 11. 3. 2024;
Pages:	Str. [19]-51
DOI:	10.18690/um.fkkt.1.2024.5
ID:	23126337