泥岩添加矽泥、聚丙烯纖維與生石灰工程性質之比較

Comparison on the Engineering Properties of Compacted Mudstone with Silicon Slurry, Polypropylene Fiber, and Quicklime

王柏凱(Bo-Kai Wang)

指導教授 ： 劉家男

國立暨南國際大學/科技學院/土木工程學系/碩士(2019年)

https://doi.org/10.6837/ncnu201900173

摘要

台灣從1990年開始半導體產業開始蓬勃及近年來提倡綠色能源，但該兩項的發展卻也帶來大量的工業廢棄物，半導體產業晶圓切割和太陽能產業太陽能矽基板製造過程產生大量的切削矽泥， 2009年高達二萬公噸的切削矽泥，現今處理方法主要以掩埋為主，本論文將利用處理過矽泥在添加石灰、纖維依照不同比例加進軟落土層進行試驗以了解改良後土壤剪力強度、摩擦角、凝聚力、壓縮性、回脹性及循環凍融後對於土壤強度的影響。
研究結果顯示，泥岩添加矽泥可以有效增加土壤最佳含水量，泥岩乾燥如岩石，遇水則會如軟泥的性質以至於工程施作困難，研究中添加矽泥、石灰及纖維後，明顯可看到開裂程度大幅降低，凝聚力提升方面生石灰有較大幫助，土樣經過7天氣乾後剪應力大幅提升，壓縮性及回脹性上原始泥岩壓縮指數為0.278，回脹指數為0.076，經添加複合材料改良後壓縮指數下降為0.035 ~ 0.081、回脹指數降低為0.013 ~ 0.031改良效果十分顯著，土壤經過凍融循環作用聚丙烯纖維可提升土壤強度，原因為經過循環凍融後破壞原始土粒間膠結狀態，讓土體結構重新排列，使的纖維加勁效果更加提升。

關鍵字

泥岩 ； 矽泥 ； 生石灰 ； 聚丙烯纖維 ； 土壤改良 ； 凍融循環

並列摘要

Taiwan has been promoting the semiconductor industry since 1990 and has promoted green energy in recent years. However, the development has also brought a large amount of industrial waste. Many silicon slurries were produced by the manufacturing process of wafer dicing in the semiconductor industry and the solarium substrate in the solar energy industry, which is up to 20,000 metric tons in 2009. The current treatment method of silicon slurry is mainly based on landfilling. This paper presents that the treated silicon slurry with the quicklime and Polypropylene fiber in different proportions were added to soft ground to test its characteristics, such as shear strength, friction angle, cohesion, compressibility, resilience and effects on soil strength after a freeze-thaw cycle.
The results show that the mudstone added silicon slurry effectively obtained the optimal water content of the soil. Mudstone is like a rock on average, and when it meets water, it will be like the nature of soft soil, which will often lead to problems in engineering application. After adding silicon slurry, quicklime, and fiber, mudstone was observed that the cracking condition had been reduced. The quicklime is much helpful in the improvement of cohesion. The shear stress of the soil sample is greatly improved after seven days of curing. The compression and swelling of the original mudstone are 0.278, and 0.076, respectively. After the composite material is improved, the compression decreased to 0.035-0.081, and the swelling decreased to 0.013-0.031. The improvement effect of the soil is very significant. The strength of the soil with Polypropylene fiber was increased by the freeze-thaw cycle, which is caused by the destruction of the original soil after cyclic freezing and thawing. In the state of cementation, the soil structure is rearranged, and the fiber stiffening effect is further enhanced.

並列關鍵字

Mudstone ； Silicon Sawing Waste ； Quicklime ； Polypropylene Fiber ； Soil Amelioration ； Freeze-Thaw Cycle

參考文獻

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