碩士 / 國立暨南國際大學 / 土木工程學系 / 105 / Diatomaceous earth is used extensively in concrete and mortar for weight- reduction and heat insulation. With the focus on reducing thermal conductivity and maintaining sufficient compressive strength, this study examined the effect of diatomaceous earth on the physical- mechanical properties and thermal conductivity of clay-based ceramics. Two clay raw materials were used for comparison. The microstructure and physical-mechanical properties of fired samples were evaluated with different replacement ratios (10-40%) and firing conditions (900、950、1000、1100℃). The clay-based ceramic materials were characterized by bulk density, porosity, shrinkage, and compressive strength. The thermal conductivity was measured in the green bodies and fired products. The results show that diatomaceous earth promotes the pore forming quite obviously for both clay samples. Hence, the increase in diatomaceous earth content leads to the decrease on compressive strength. Results indicate that diatomaceous earth promotes the thermal insulation ability only for ball clay with 30-40% addition with a firing temperature of 1100℃, but it leads to a decrease of compressive strength to about 13.6-16.16 MPa. With a firing temperature of 1100℃, the thermal conductivity of clay samples produced with 40% addition of diatomaceous earth was reduced 40%, compared to the one without diatomaceous earth. The current results show the effect of diatomaceous earth on weight reduction and the thermal insulation ability of clay brick.
| Identifer | oai:union.ndltd.org:TW/105NCNU0015007 |
| Date | January 2017 |
| Creators | Ho, Tsung-Lin, 何宗霖 |
| Contributors | Lee, Ven-Gen, 李文娟 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 56 |
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