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This study prepares volcanic ash (VA)-blast furnace slag (S) based alkali-activated materials (AAM) with the addition of ceramic waste for exposure to high temperatures (1000 degrees C). The tem-perature resistance of alkali-activated materials were described by measuring their surface mor-phology, gel structure and thermal damage degree, through NMR and UPV tests. At calcination temperature of 800 degrees C, the VA-based alkali-activated materials with ceramic waste shows ultra-sonic velocity of 1962 m/s and a porosity of 17.30 %, indicating the prevention from gel struc-tural collapse. As low calcination temperatures (<= 600 degrees C), ceramic waste only functions as filler materials and reduces compressive strength of the alkali-activated materials. While at calcination temperature of 800 degrees C, there is an activity generated by the transformation of crystalline phases into amorphous phases in the ceramic waste, thus participates the alkali-activated reaction and increases compressive strength of the alkali-activated materials. At 1000 degrees C, the collapse of skele-ton of the alkali-activated material is induced by thermal incompatibility of the matrix and ther-mal compression.
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JOURNAL OF BUILDING ENGINEERING
ISSN: 2352-7102
Year: 2023
Volume: 82
6 . 7
JCR@2023
6 . 7 0 0
JCR@2023
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 4
SCOPUS Cited Count: 1
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1