研究生: |
林昭元 |
---|---|
論文名稱: |
鈣矽酸鹽骨水泥的機械性質與水合機制 |
指導教授: | 金重勲 |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 材料科學工程學系 Materials Science and Engineering |
論文出版年: | 2004 |
畢業學年度: | 92 |
語文別: | 中文 |
論文頁數: | 81 |
中文關鍵詞: | 三鈣矽酸鹽 、氫氧基磷灰石 、固化時間 、抗壓強度 、水合機制 |
相關次數: | 點閱:3 下載:0 |
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三鈣矽酸鹽C3S (3CaO.SiO2)是工業用波特蘭水泥的主要成分之一,具有水泥的自固化特性,我們以固相反應法合成C3S,並對合成後殘餘的氧化鈣做半定量的檢定,接下來實驗主要分為機械性質測試與水合機制的討論。
機性測試包含兩大部分
第一:固化時間,抗壓強度,表面 pH值測定。除此之外,我們添加磷酸鹽類溶液於固相反應合成的C3S中,由X-ray鑑定知氧化鈣減少、氫氧基磷灰石產生。在機械性質量測方面,固化時間與抗壓強度均減少,表面的pH值則有下降。
第二:以水熱法製備奈米級顆粒的氫氧基磷灰石,並將之添加入水泥粉中,所選用的水泥粉為C3S以及ZnC3S(Zn/Ca = 5 mol%),量測水合後水泥的機械性質。總體上ZnC3S的抗壓強度較C3S高,較特別的是發現添加HA的C3S抗壓強度會下降,但在10 wt%的HA含量時,則有最大的固化時間。而ZnC3S部分,發現添加7.5wt% HA時,有最大的抗壓強度與固化時間。
水合機制分面:將水合時期分為三個時期(初、中、後期),發現在初期時,水泥會長成一顆顆剌針狀的海膽結構。中期時,剌針狀結構會溶解。而到後期,剌針狀結構已消失,有較大的結晶顆粒出現。並以X-ray鑑定各個時期出現的水合物(C-S-H)。
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