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Strength Enhancement of Aluminosilicate Aggregate Through Modified Thermal Treatment
Author(s) -
Luscher Walter G.,
Hellmann John R.,
Scheetz Barry E.,
Wilson Brett A.
Publication year - 2006
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2006.02064.x
Subject(s) - aluminosilicate , materials science , gas pycnometer , kaolinite , aggregate (composite) , compressive strength , bauxite , composite material , scanning electron microscope , geopolymer , phase (matter) , mineralogy , thermal , chemical engineering , porosity , metallurgy , thermodynamics , geology , biochemistry , chemistry , organic chemistry , catalysis , physics , engineering
Commercial aluminosilicate aggregates derived from kaolinite and bauxite were evaluated for various physical and mechanical properties. Suites of thermal treatments based on known phase relationships were performed, resulting in significant modification of microstructural and crystalline phase evolution. These structural changes were evaluated and rationalized via scanning electron microscopy and X‐ray diffraction, respectively. Subsequent measurement of mechanical strengths by diametral compression and density by gas pycnometry indicated increases in overall strengths (up to 24%) at a comparable densities (approximately 2.8 g/cm 3 ) in kaolinite‐derived aggregates. Results of this study are being used to drive processing modifications to achieve higher specific strength in aluminosilicate‐derived aggregates.