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Optimum Bloating-Activation Zone of Artificial Lightweight Aggregate by Dynamic Parameters
1Department of Materials Engineering, Kyonggi University, Suwon 162-27, Korea. supreme98@kyonggi.ac.kr.
Materials (Basel, Switzerland)
|January 18, 2019
Summary
This study compares lightweight aggregate bloating under normal and rapid sintering. Rapid sintering avoids black cores and lightens aggregate at 1150°C, while normal sintering shows density reduction with higher input temperatures.
Area of Science:
- Materials Science
- Ceramic Engineering
Background:
- Lightweight aggregates are crucial in construction for thermal insulation and reduced structural load.
- Understanding the bloating mechanism is key to optimizing production and material properties.
Purpose of the Study:
- To compare the bloating mechanisms of artificial lightweight aggregate under normal and rapid sintering conditions.
- To identify factors influencing lightweight aggregate bloating during sintering.
- To determine optimal temperature ramping conditions for aggregate production.
Main Methods:
- Artificial lightweight aggregate (10 mm particle size) produced from acid clay.
- Sintering conducted using both rapid and normal firing methods.
- Characterization included bulk density, water absorption ratio, and cross-section observation.
Main Results:
- Rapid sintering resulted in no black core and aggregate lightening at 1150°C.
- Normal sintering showed reduced bulk density with higher input temperatures and shorter times.
- Bulk density changes during normal sintering exhibited three distinct sections, including a bloating-activation zone with abrupt density decrease.
Conclusions:
- Rapid sintering offers a controlled method for producing lightweight aggregate without internal defects.
- Temperature and time are critical parameters influencing the bloating behavior and density of lightweight aggregate.
- The identified bloating-activation zone provides insights for optimizing sintering cycles.
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