Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 15, Pages 11953-11966Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.06.045
Keywords
Coal fly ash; Alkali activation; Ceramic tile; Zeolite; Hydroxysodalite
Categories
Funding
- National Natural Science Foundation of China [51474199]
- Major State Basic Research Development Program of China [2013CB632601]
Ask authors/readers for more resources
Coal fly ash (CFA) accounts for a large fraction of the solid waste produced in China. Hence, there is an urgent need for the effective utilization of CFA, for example, as a raw material for ceramics production. In this study, clay-and feldspar-like materials fabricated by alkali activation pre-treatment of CFA were mixed with untreated CFA (regarded as a quartz-like material) and sintered to prepare fully ash-based ceramic tiles. The obtained tiles exhibited excellent sintering properties, e.g., low firing temperature and a wide sintering range; further, they showed better green strength (due to hydrogen bonding) and post-sintering performance (due to fluxing and mullite skeleton effects) than ceramic tiles produced exclusively from untreated CFA. The fully ash-based ceramic tiles sintered at 1100 degrees C exhibited optimal post-sintering properties (bulk density, 2.5 g/cm(3); rupture modulus, 50.1 MPa; and water absorption, 0%). Thus, the proposed method is well suited for preparing a novel kind of ceramic tiles completely derived from CFA, highlighting its importance in the field of fly ash ceramics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available