Advances in Materials Science and Engineering / 2019 / Article / Tab 4

Research Article

Bloating Mechanism of Lightweight Aggregates due to Ramping Rate

Table 4

Bulk density and microstructure with ramping rate.

No.Firing conditionsHeating rate (°C/min)Bulk density (g/m3)Water absorption ratio (%)Microstructure image of cross sectionBloating mechanism

A600°C + 1180°C 10 min.721.724.1Black core
B700°C + 1180°C 10 min.691.753.8Black core
C800°C + 1180°C 10 min.671.74.1Black core
D900°C + 1180°C 10 min.641.515.1Black core
E900°C + 1180°C 20 min.351.535.2Black core
F600°C + 1180°C 30 min.271.532.5Micropore
G700°C + 1180°C 30 min.261.522.7Micropore
H800°C + 1180°C 30 min.251.512.1Micropore
I300∼1180°C normal sintering 40 min.251.31.8Micropore
J300∼1180°C normal sintering 60 min.161.321.7Micropore

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