氧化矽與氧化鋯應用於混凝土強度之研究

The Study of Application on Silica and Zirconia for Concrete Strength

劉正川(Janq-Chuan Liou) ； 蘇欣宏(Shin-Hone Su) ； 王亮力(Liang-Li Wang)

《臺北科技大學學報》 40卷1期 (2007/03) Pp. 115-122

https://doi.org/10.29768/JNTUT.200703.0010

摘要

本研究使用之材料為SiO2（簡稱TS）及ZrO2（簡稱TZ），分別以0.1~0.5% (TS01~TS05、TZ01~TZ05)來取代部分水泥以製作水泥砂漿立方試體及混凝土圓柱試體，觀察材齡於3天、7天、28天以及56天的抗壓強度表現。另外，製作水泥砂漿樣本，以微觀結構作定性分析。抗壓強度試驗結果顯示：添加試驗材料取代部分水泥後，所製成之水泥砂漿立方試體及混凝土圓柱試體的抗壓強度曲線趨勢相似，其中添加0.5%之ZrO2表現最佳，材齡28天約提升強度約18%，而添加0.2%之SiO2居次，材齡28天強度約有10%之漲幅。經微觀分析結果顯示：因添加SiO2與ZrO2比對照組產生較多C-S-H膠體，所以總膠結量增加而助長強度之提升。

關鍵字

混凝土 ； 水泥 ； 二氧化矽 ； 二氧化鋯

並列摘要

This study uses tow microrized materials to replace parts of cement for producing mortar cube and concrete cylindrical specimens. The tow microrized materials include ZrO2 (TZ) and SiO2 (TS). The percentage of each microrized material in specimens is between 0.1% and 0.5% with respect to cement. The compressive strength of these specimens is recorded for curing periods of 3, 7, 28 and 56 days, respectively. Besides, pastes are made cement specimen for a qualitative microstructure analysis. It shows from the test that after adding the mercerized materials to replace parts of cement, the compressive strength cures obtained from the cement cubes are similar to those obtained from the concrete cylindrical specimens. Of which the sample with 0.5% ZrO2 (TZ) performances best, and the one with 0.2% SiO2 (TS) accordingly. Microstructure analyses show similar results between experiments and controls, no matter what kind of replaced materials is applied. Therefore, it can be concluded that the main factor to influence the compressive strength of concrete is the physical properties of material rather than chemical reactions.

並列關鍵字

Concrete ； Cement ； Silica ； Zirconia