再生粒料混凝土配比方法與最優選工程性質之評估研究

Study on Mix Proportion Method and Evaluation of Optimal Engineering Porperties of Recycled Aggregate Concrete

蕭添進(Tien-Chin Hsiao) ； 張大鵬(Ta-Peng Chang) ； 蔡得時(Der-Shys Tsay) ； 楊宗叡(Tzong-Ruey Yang)

《中國土木水利工程學刊》 22卷4期 (2010/12) Pp. 399-409

https://doi.org/10.6652/JoCICHE.201012_22(4).0005

摘要

本研究提出一個新的再生粒料混凝土配比計算法，配合田口實驗計畫法評估再生粒料混凝土最優選工程性質，變數包括不同水膠比（0.37、0.40 及0.43）、再生混凝土粗粒料取代率（0％、50％及100％）、再生混凝土細粒料取代率（15％、30％及45％）及爐石取代率（0％、20％及40％）對再生粒料混凝土坍流度、電阻係數及抗壓強度之影響，最後以灰色關聯度法分析判定多重品質特性之最優選化製程，研究結果顯示最優選再生粒料混凝土配比組合為0.40水膠比、再生混凝土粗粒料量取代量100％、再生混凝土細粒料取代量15％及爐石取代量0％，所得最優選工程性質為抗壓強度38.47 MPa、電阻值為29.97kΩ-cm，坍流度值為653 mm，顯示使用再生混凝土粗細粒料之再生粒料混凝土最優選工程性質評估模式之可行性。

關鍵字

再生混凝土粒料 ； 再生粒料混凝土配比 ； 田口實驗計畫法 ； 灰色關聯度 ； 最優選工程性質

並列摘要

This study proposes a new mix proportion method for recycled aggregate concrete and incorporates the Taguchi method of experimental design to investigate the optimal engineering properties of recycled aggregate concrete. Experimental variables include different W/C (water-cementitious material) ratios (0.37, 0.40 and 0.43), replacements of recycled coarse aggregate (RCA) (0%, 50% and 100%), replacements of recycled fine aggregate (15%, 30% and 45%) and three replacement ratios of slag (0%, 20% and 40%) for the evaluation of the slump flow, electrical resistance and compressive strength of recycled concrete. Finally, the analysis of grey relationship is used to identify the optimal manufacture process from the multiple indices of quality. The results show that the optimal mixture proportioning is found to be 0.4 of W/C, 100% RCA, 15% RFA and 0% slag. The resulting RAC has the compressive strength of 38.47 MPa, electrical resistance of 29.97 kΩ-cm and slump flow of 653 mm, indicating the feasibility of the evaluation model for the recycled concrete with the recycled concrete coarse and fine aggregates.

並列關鍵字

recycled concrete aggregate ； mix proportion for recycled aggregate concrete ； taguchi method of experimental design ； grey relationship ； optimal engineering properties