本研究依「再生混凝土施工規範草案」粒料分級制度，探討各級再生粒料性質與拌製成再生混凝土之工程性質。研究中選用常重粒料、破碎混凝土、土資場再生粒料與市售紅磚等四種粒料製成H與N級粒料，使用預拌廠慣用摻料添加比例配比並選用兩種水膠比0.3及0.6，探討再生混凝土硬固性質；另外改變粗細粒料比例與利用複合材料理論測定N級再生粒料彈性模數。
研究結果顯示，(1) 依「再生混凝土施工規範草案」再生粒料分類，H級粒料的筒壓強度約在7.56~13.35 MPa範圍之間，N級粒料的筒壓強度約在3.41~5.43 MPa範圍之間，其強度差異原因為不同再生粒料本身不同低比重與高吸水率性質所致。(2) 再生混凝土與一般混凝土相同，水膠比愈低則抗壓強度愈高，且依照H與N級粒料品質差異而有所差別，如56天齡期時，RH206之抗壓強度為30.11 MPa，RN206之抗壓強度28.05 MPa，但抗壓強度皆優於「再生混凝土施工規範草案」所規定之C級混凝土強度，這顯示規範所規定之內容相當嚴謹且保守。(3) 再生混凝土之熱傳導係數隨齡期變化較不顯著，而是隨著混凝土拌製粒料粒料等級還有再生粒料的含量有所關聯，RH2粒料時，熱傳導係數為2.23 W/m．K；RN2粒料時，熱傳導係數為1.93 W/m．K，RN20340到RN20360之熱傳導係數為2.06 W/m．K下降到1.68 W/m．K。(4) 再生混凝土之彈性模數會隨著再生粒料含量增加而降低之外，且會隨粒料品質差異而改變，如RN20340到RN20360之彈性模數為27.44 GPa下降到20.73 GPa，且RN2組相對RH1組彈性模數損失率為16.24%增加到32.63%。(5) 使用Yang’s Model複合材料理論計算再生粒料彈性模數，RH1粒料之彈性模數約為41.28GPa，且N級粒料的彈性模數範圍約在10.34 GPa到27.86 GPa之間。

This paper, studied the engineering properties of recycled coarse aggregate and recycled concrete following the regulation specified in the “Draft of Construction Specification for Recycled Concrete” of Taiwan. Four kinds of coarse aggregate, natural aggregate, recycle aggregate from lab, recycle aggregate from field and brick, were used to manually produce the H- and N- classes recycled aggregate. For the experiment work on the mechanical properties of concrete, pozzolanic materials were added according to the common mixture proportion used by commercial ready mixed concrete plants. The water-to-cementious materials ratios (w/c) were controlled to be 0.3 and 0.6. The elastic moduli of N-class recycled aggregate were investigated by change the volume ratios of recycled coarse aggregate to total aggregate and calculated by the theory of composite materials.
Research results show that: (1) Following the grading specified in the “Draft of Construction Specification for Recycled Concrete”, the crushing strength of H-class recycled aggregate is between 7.56 ~13.35MPa; and N-class recycled aggregate is between 3.41 ~5.43MPa. The strength difference results from different low specific weight and high absorption property of different recycled aggregates. (2) Same as normal concrete, recycled concrete with low w/c ratio obtains higher compressive strength. The compressive strengths also vary with the grading of H-and N-class aggregate. For example, the compressive strength of RH206 is 30.11 MPa, and 28.05 MPa for RN206 at age of 56 days. It revealed that the “Draft of Construction Specification for Recycled Concrete” is conscientious and conservative since the compressive strengths of all specimens were higher than those specified in the regulation of C-class recycled concrete. (3) The thermal conductivity of recycled concretes were not changed with ages, but varied with grades and content of recycled aggregate. For example, at the w/c ratio equal to 0.3, the thermal conductivity is 2.23 W/m•k for concrete mixed with RH2 aggregate,1.93 W/m•k with RN2 aggregate. When the recycle aggregate content was changed from 40% to 60%, the thermal conductivities were varied from 2.06 to 1.68 W/m•k. (4) The Elastic modulus of recycled concrete is decreased with the increase of recycled aggregate content and varied with aggregate grade. For example, at the w/c ratio equals to 0.3 concretes mixed with RN2 recycled aggregate, with the content changed from 40% to 60%, the elastic modulus of concretes were varied from 27.44 to 20.73 GPa. The loss ratios of elasticity modulus between RH1 and RN1 are 16.24% to 32.63%. (5) Using the theory of composite material (Yang’s Model) to estimate elastic modulus of recycled aggregate, the elastic modulus of concrete with RH1 aggregate is 41.28 GPa and the elastic moduli of concrete with N class aggregate are varied from 10.34 to 27.86 GPa.

1.Hansen, T.C. and E. K. Lauritzen, Concrete Waste in a Global Perspective. ACI International SP-219, Recycling Concrete and Other Materials for Sustainable Development, 2004: pp. 35~46.
2.Baker, R., and K. Sagoe-Crentsil, CSIRO Research Update：Construction & Demolition Waste. Building Innovation & Construction Technology, 2000. 12.
3.HB155-2002, Guide to the Use of Recycled Concrete and Masonry Materials, in Standards Australia. 2002.
4.DIN-1045, Concrete and Reinforced Concrete ; Design and execution, in German Code 1998.
5.Lauritzen, E.K., Recycling Concrete - An Overview of Challenges and Opportunities. ACI International SP-219 Recycling Concrete and Other Materials for Sustainable Development, 2004: p. 1~10.
6.內政部營建署, 「營建剩餘土石方資訊服務中心」網站：http://140.96.175.34/spoil/.
7.葉祥海，內政部建築研究所，「再生混凝土施工規範草案之研擬」，2006年。
8.Hansen, T.C. and H. Narud, Strength of Recycled Concrete Made from crushed concrete Coarse Aggregate. Concrete International: Design and Construction, 1983. 5(1): pp. 79-83.
9.Buck, A.D., Recycle Concrete as a source of aggregate. Journal of The American Concrete Institute, 1977. 74(5): pp. 212-219.
10.Ray, G.K., New Pavement from Old Concrete. Civil Engineering (New York), 1985. 55(5): pp. 56-58.
11.顏聰、黃玉麟、陳豪吉, 「混凝土廢棄料回收再生利用之研究」. 內政部建築研究所專題計畫研究成果報告, 1997.
12.佐藤 健 , 賴., 「日本廢棄混凝土塊回收砂石粒料之技術與經驗」. 台灣礦業, 2002. 54(3): pp. 52-70.
13.魏立帆（黃兆龍指導）, 「再生粒料應用於高性能混凝土工程性質之研究」. 國立台灣科技大學碩士論文, 台北 (2004).
14.蘇南、王博麟, 「廢混凝土回收粗粒料品質與再生混凝土工程性質之探討」. 中國土木水利工程學刊, 2000. 12(3): pp. 435-444.
15.廖惇治（陳豪吉指導）, 「磚類建材應用於再生凝土之探討」. 國立中興大學土木工程研究所碩士論文, 台中 (2001).
16.Johnston, C.D., Waste Glass as Coarse Aggregate for Concrete. Journal of Testing & Evaluation, 1974. 2(5): pp. 344-350.
17.Chen, H.-J., T. Yen, and K.-H. Chen, Use of building rubbles as recycled aggregates. Cement and Concrete Research, 2003. 33(1): pp. 125-132.
18.Limbach, M., Construction and Demplition Waste Recycling for Reuse as Aggregate in Concrete Production. Kingston University, London (2003).
19.Topcu, I.B. and S. Sengel, Properties of concretes produced with waste concrete aggregate. Cement and Concrete Research, 2004. 34(8): pp. 1307-1312.
20.Mukai, T., and M. Kikuchi, Fundamental Study on Bond Properties between Recycled Aggregate Concrete and Steel Bar. Cement Association of Japan, 32nd Review 1978.
21.Poon, C.S., et al., Influence of moisture states of natural and recycled aggregates on the slump and compressive strength of concrete. Cement and Concrete Research, 2004. 34(1): pp. 31-36.
22.符哲武（趙文成指導）, 「再生粗粒料用以生產高流動化混凝土之可行性與其工程性質研究」. 國立交通大學土木工程研究所碩士論文, 新竹 (2001).
23.Tu, T.-Y., Y.-Y. Chen, and C.-L. Hwang, Properties of HPC with recycled aggregates. Cement and Concrete Research, 2006. 36(5): pp. 943-950.
24.Xiao, J., J. Li, and C. Zhang, Mechanical properties of recycled aggregate concrete under uniaxial loading. Cement and Concrete Research, 2005. 35(6): pp. 1187-1194.
25.Poon, C.S., Z.H. Shui, and L. Lam, Effect of microstructure of ITZ on compressive strength of concrete prepared with recycled aggregates. Construction and Building Materials, 2004. 18(6): pp. 461-468.
26.黃然，徐振翔, 粒料特性對於高性能混凝土內部結構及工程性質影響之研究. 行政院國家科學委員會專題研究計畫成果報告，計畫編號：NEC 83-0410-E-019-006, 1995.
27.張世健（顏聰指導）, 再生混凝土之製造及性質研究. 國立中興大學土木工程研究所碩士論文, 台中 (1997).
28.陳豪吉、彭獻生、許書王, 「再生混凝土力學性質之探討」. 中國土木水利工程學刊, 2003. 15(4): pp. 869-876.
29.Gomez-Soberon, J.M.V., Porosity of recycled concrete with substitution of recycled concrete aggregate: An experimental study. Cement and Concrete Research, 2002. 32(8): pp. 1301-1311.
30.Senthamarai, R.M. and P. Devadas Manoharan, Concrete with ceramic waste aggregate. Cement and Concrete Composites, 2005. 27(9-10): pp. 910-913.
31.Lin, T. D. Ellingwood, B. and Piet, 0.”Flexural and Shear Behavior of Reinforced Concrete Beams During Fires Tests”, Portland Cement Association Research and Development bulltin RD 091T, NOV, 1987..
32.歐書豪(張大鵬指導)，礦物摻料及蒸汽養護對不同配比水泥砂漿熱傳導性質之影響，國立台灣科技大學碩士論文，民國92年。
33.Kim, J. K., K. H. Kim, J. K. Yang, “ Thermal Analysis of Hydration Heat in Concrete Structures with Pipe-cooling System,” Computers and Structures, Vol. 79, No.2, pp. l63-171, 2001.
34.Brown, T. D. and Javaid, M. Y.”The Thermal Conductivity of Fresh Concrete,” Materials and Structures, V. 3, No. 18. pp.411~416. 1970
35.莊昆斌(張大鵬指導)，蒸氣養護對不同爐石添加量自充填混凝土熱學性質及工程性質之研究，國立台灣科技大學碩士論文，民國93年。
36.Hirth, Thermal Properties of Concrete at Extreme Temperatures. Doctor of philosophy in Eny, inG,D, of The University of California, Berkeley,1982.
37.ACI Committee-211.1, Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete. Manual of Concrete Practice. 1988. 34.
38.Kim, K.-H., et al., An experimental study on thermal conductivity of concrete. Cement and Concrete Research, 2003. 33(3): pp. 363-371.
39.Mindess, S., J.F. Young, and D. Darwin, Concrete, ed. Second.
40.Hansen, T.C., Strength,Elasticity and Creep as related to the Internal Structure of Concrete. Chemistry of Cement, Proceedings of the Fourth International Symposium,Monograph 43, Washington 1960. 2: pp. 709-723.
41.Hirsch, T.J., Modulus of Elasticity of Concrete Affected by Elastic Moduli of Cement Paste Martrix and aggregate. ACI Journal, Feb.1962. 59: pp. 427-451.
42.Popovics, S. and M. Erdey, Estimation of the modulus of elasticity of concrete-like composite materials. Materials and Structures, 1970. 3(4): pp. 253-260.
43.De Larrard, F., Formulation et proprietes des beton a tres haute performance. Rapport de recherche L.P.C., Paris,Mar.1988. 149: p. 335.
44.Alexander, M.G. and D.E. Davics, Properties of Aggregate in Concrete. Hippo Quarries Technical Publications, Witwatersrand, South Africa 1989: p. 44.
45.Yang, C.C., et al., Theoretical Approximate Elastic Moduli of Concrete Material. The Chinese Journal of Mechanics, 1995. 11(1).
46.Mori, T. and K. Tanaka, Average Stress in Matrix and Average Energy of Materials with Misfitting Inclusions. Acta Metall, 1973. 21: pp. 571-574.