Potential of green ceramics waste for alkali activated foams

Barbara Horvat (Author), Vilma Ducman (Author)

Abstract

The aim of the paper is to research the influence of foaming and stabilization agents in the alkali activation process of waste green ceramics for future low cost up-cycling into lightweight porous thermal insulating material. Green waste ceramics, which is used in the present article, is a green body residue (non-successful intermediate-product) in the synthesis of technical ceramics for fuses. This residue was alkali activated with Na-water glass and NaOH in theoretically determined ratio based on data from X-ray fluorescence (XRF) and X-ray powder diffraction (XRD) that was set to maximise mechanical properties and to avoid efflorescence. Prepared mixtures were compared to alkali activated material prepared in theoretically less favourable ratios, and tested on the strength and density. Selected mixtures were further foamed with different foaming agents, that are Na-perborate (s), H2O2 (l), and Al (s), and supported by a stabilization agent, i.e., Na-dodecyl sulphate. The goal of the presented work was to prepare alkali activated foam based on green ceramics with density below 1 kg/l and compressive strength above 1 MPa.

Keywords

alkalijska aktivacija;penjenje;SEM;XRF;XRD;mehanska trdnost;alkali activation;foaming;mechanical strength;

Data

Language:	English
Year of publishing:	2019
Typology:	1.01 - Original Scientific Article
Organization:	ZAG - Slovenian National Building and Civil Engineering Institute
Publisher:	Molecular Diversity Preservation International
UDC:	620.1/.2
COBISS:	2489447
ISSN:	1996-1944
Views:	1
Downloads:	0
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	alkalijska aktivacija;penjenje;mehanska trdnost;
Source comment:	Nasl. z nasl. zaslona; Opis vira z dne 4. 11. 2019; Številka članka : 3563;
Pages:	str. 1-30
Volume:	ǂVol. ǂ12
Issue:	ǂno. ǂ21
Chronology:	2019
DOI:	10.3390/ma12213563
ID:	19929467