The Study on the Manufacturing Lightweight Aggregrate from Sludge and Mud
| Autor: | Wen-wen Liang, 梁文文 |
|---|---|
| Rok vydání: | 2010 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 98 In this study, sludge from Taipei and Taoyuan and mud from Taoyuan were used as raw material for manufacturing lightweight aggregates. Base on the basic property of raw materials, 9 groups aggregate formula were designed through the optimization design procedure, green particles were granulated by using self-developed granulation machine and were sintered under high-temperature, and then the property of lightweight aggregate (LWA) were analyzed by various technology. Two kinds of lightweight aggregates with density lower than 1.3 g/cm3 were selected to make high-performance lightweight concrete (HPLWC). The results showed that in the same firing conditions, the LWA through the optimal design have a good expansion behavior. Sludge and mud deposition temperature is related to the SiO2 and Al2O3 content and the total flux. As SiO2 + Al2O3 content greater than 79%, the bloating temperature, T1 significantly increased; as flux greater than 3%, the melting temperature, T2, decreased. At 1150~1250℃, the density of LWA particles will be within 1.12 and 2.0 g/cm3 and water absorption be less than 6%, use such LWA to produce LWHPC, the unit weight of fresh concrete is less than 1900 kg/m3, the 28-days compressive strength can be higher than 300kgf/cm2, electrical resistinty is more than 20kΩ-cm, and the thermal conductivity is less than 0.9W/mK . |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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