廢白土污泥再用於水泥混凝土之探討

Reuse of White Carbon Sludge in Cement Concrete

呂東璇(Dong-Xuan Lu) ； 黃雅蘭(Ya-Lan Huang) ； 吳宇婷(Yu-Ting Wu) ； 李增欽(Tzen-Chin Lee)

《聯大學報》 11卷2期 (2014/12) Pp. 219-232

摘要

白煙（White Carbon）是橡膠煉製所需之補強劑與填充劑，其製程所產生的廢白土污泥（White Carbon Sludge;WCS），含有團聚狀之二氧化矽（SiO_2）奈米粒子，於廢棄過程可能對生態環境造成污染之疑慮。但因該廢白土污泥經XRD分析與卜作嵐活性指數試驗結果顯現為一卜作嵐材料，甚值資源再用於混凝土。本文嘗試以四個控制因子（Control Factors），三種配置水準（Levels）之L9（3）^4直交法（Orthogonal Array）之實驗設計，進行水泥砂漿試體灌鑄與抗壓強度試驗，並以量測之信號雜訊比（S/N比）求得抗壓強度相對最佳化之配比，進而灌鑄成廢白土污泥混凝土試體與純混凝土試體，進行抗壓強度、超音波量測及質量成長量測等工程性質試驗之比對與分析，試驗結果顯示，廢白土污泥混凝土之抗壓強度與純混凝土試體相近而略高，其他工程性質亦相近，若能應用於工程實務上，既能避免污染環境，又可減少水泥之生產，對地球永續發展應有助益，一舉數得。

關鍵字

廢白土污泥 ； 奈米粒子 ； 抗壓強度 ； 混凝土 ； 實驗設計

並列摘要

White carbon sludge (WCS), which is a by-product of the white carbon manufacturing process and an industry waste. Since WCS contains agglomerated nanoparticles, disposing of them may be polluting our ecological environment. Nevertheless WCS was confirmed as a pozzolanic material by XRD analysis and pozzolanic activity index testing, the feasibility of reuse in concrete is worth to explore. In this study, four control factors with three levels in L9(3)^4 orthogonal array are considered to design this experiment. The compressive strength of each cement mortar samples is measured and the corresponding S/N ratios are calculated to investigate the optimal setting. The properties of WCS sludge-blended cylindrical concrete (SBCC) specimens were for compressive strength test, ultrasonic pulse velocity measurement, mass growth measurement, and other engineering properties test. The experimental test result reveals that the compressive strength of SBCC specimens are comparable to the ordinary Portland cement concrete specimens in all curing age, the other engineering properties were similar. Hence, the WCS sludge can be converted to a useful resource by exempting the difficulty of disposal problems and appeal to the environmental sustainability.

並列關鍵字

White carbon sludge ； Nanoparticle ； Compressive strength ； Cement Concrete ； Design of experiments

參考文獻

經濟部(2008)，事業廢棄物再利用種類及管理方式，經濟部工業局，台北市。

王年福(2003)。水泥製程於資源再利用之研究(碩士論文)。國立中央大學土木工程研究所。

Mana, M.,Ouali, M. S.,Lindheimer, M.,Menorval, L.C.(2008).Removal of lead from aqueous solutions with a treated spent bleaching earth.J. Hazard. Mater..159,358-364.

Weng, C. H.,Tsai, C. Z.,Chu, S. H.,Sharma., Y. C.(2007).Adsorption characteristics of copper (II) onto spent activated clay.Separation and Purification Technology.54,187-197.

Weng, C. H.,Sharma, Y. C.,Chu, S. H.(2008).Adsorption of Cr(VI) from aqueous solutions by spent activated clay.J. Hazard. Mater..155,65-75.