再生混凝土的性能及其改性研究
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摘要
随着建筑业的迅速发展，由建筑业产生的建筑垃圾也空前增加，对环境产生了一定的影响，对社会产生了一定的危害。将废弃混凝土经过破碎、除杂、分级等处理后作为再生骨料，并利用再生骨料配制再生混凝土的技术不仅可以解决废弃混凝土带来的环境污染，还可以节约天然骨料资源，带来显著的社会效益、经济效益和环境效益，是一条节约资源、能源，减轻地球环境负荷及维护生态平衡的可持续发展道路。
本文概述了再生混凝土对环境的影响以及其在国内外的研究现状和发展，提出发展再生混凝土技术是社会可持续发展的需要。本文设计了一套生产再生骨料的处理工艺流程，并利用武昌车辆厂的废弃混凝土制备了一定量的再生骨料。对再生骨料的表观密度、吸水率、压碎指标、容重和孔隙率等基本性能进行了研究，分析了分别采用聚合物和有机硅防水剂进行表面处理后的再生骨料的性能变化。从而得出经过表面处理后再生骨料的吸水率有所降低，性能有所改善。
本文根据再生骨料和粉煤灰的不同取代率设计了几组不同配合比的再生混凝土，对其工作性能和力学性能进行了研究，分析了再生骨料的取代率、粉煤灰的取代量、表面处理再生骨料及掺加高效减水剂和矿物外加剂等因素对再生混凝土的工作性能和力学性能的影响。
本文根据配制的再生混凝土对其抗硫酸盐侵蚀性能、抗渗性、抗冻性等耐久性进行了研究，分析了再生骨料的取代率、粉煤灰的取代量、表面处理再生骨料及掺加高效减水剂和矿物外加剂等因素对再生混凝土的这些性能的影响。并对再生混凝土的应用进行了经济可行性分析，为再生骨科和再生混凝土的应用提供了有利的支持。
本文对再生混凝土的结构及结构性能研究较少，还有待今后进一步研究。同时为了使再生混凝土的应用得到推广，还应为再生混凝土的施工制定一定的规范和标准，这需要政府的产业政策扶持和国家的法律法规保障。政府必须制定“强制性”的建筑垃圾处理的专项法规，以推动再生混凝土——这一新型绿色混凝土在我国的迅速发展。
With the rapid development of the building industry, the building waste produced in the architecture industry also increase rapidly, which influences the environment and is harm to the society. After waste concrete are crushed, removed impurities, classification, they can be used as recycled aggregates. The technology of using recycled aggregates to confect recycled concrete not only may resolve the environment pollution produced by the waste concrete, but also may save crude aggregates resource, and bring the prominent social benefit, economic benefit and environmental benefit. It is a sustainable development road that can save resources and energy, alleviate the earth environment load and support the ecosystem balance.
This paper summarizes that recycled concrete brings the influence to the environment and its domestic and international research status and development, and puts forward developing the recycled concrete technology is the need of social sustainable development. The paper designs a set of technics flow of producing recycled aggregates and uses scrap concrete in Wuchang vehicle factory to manufacture some recycled aggregates, and researches the basic properties of recycled aggregates such as apparent density, absorption, crush index, compacted density, porosity, etc. and analyses the properties change of recycled aggregates after the respective surface treatment with the polymer and polysilicone waterproofing agents, and then obtains the result that their absorption decreases and their properties improves after recycled aggregates are surface treated.
The paper designs some teams of different mix proportion concrete according to the different replacement of the recycled aggregates and fly ash, and researches their working properties and mechanical properties, and analyses influence factors of the working properties and the mechanical properties of the recycled concrete such as the replacement rate of recycled aggregates, the
replacement amount of fly ash, surface treatment of recycled aggregates, adding the high range water reducing agents and mineral admixture, etc.
The paper researches the durability of recycled concrete as to the sulphate-corrosion resistance, the permeability resistance, the frost-resistance, etc. and analyzes some factors, as to the replacement of recycled aggregates, the replacement of fly ash, the surface treatment of recycled aggregates, adding high range water reducing agent and mineral admixture, bring the influence to the properties of recycled concrete, and analyzes the economic feasibility of the application of the recycled concrete. It offers the advantageous support for the application of recycled concrete.
The paper researches less on the structures and the properties of the structures of recycled concrete, and it deserves further research. At the same time in order to extend the application of recycled concrete, some standards and criterions must be established for the construction of recycled concrete. It need the support of the governmental industry policy and the guarantee of national law and statute. The government must establish compulsory special statute for the treatment of building waste, to promote the quick development of recycled concrete, a sort of new-style green concrete, at our country.
本文概述了再生混凝土对环境的影响以及其在国内外的研究现状和发展，提出发展再生混凝土技术是社会可持续发展的需要。本文设计了一套生产再生骨料的处理工艺流程，并利用武昌车辆厂的废弃混凝土制备了一定量的再生骨料。对再生骨料的表观密度、吸水率、压碎指标、容重和孔隙率等基本性能进行了研究，分析了分别采用聚合物和有机硅防水剂进行表面处理后的再生骨料的性能变化。从而得出经过表面处理后再生骨料的吸水率有所降低，性能有所改善。
本文根据再生骨料和粉煤灰的不同取代率设计了几组不同配合比的再生混凝土，对其工作性能和力学性能进行了研究，分析了再生骨料的取代率、粉煤灰的取代量、表面处理再生骨料及掺加高效减水剂和矿物外加剂等因素对再生混凝土的工作性能和力学性能的影响。
本文根据配制的再生混凝土对其抗硫酸盐侵蚀性能、抗渗性、抗冻性等耐久性进行了研究，分析了再生骨料的取代率、粉煤灰的取代量、表面处理再生骨料及掺加高效减水剂和矿物外加剂等因素对再生混凝土的这些性能的影响。并对再生混凝土的应用进行了经济可行性分析，为再生骨科和再生混凝土的应用提供了有利的支持。
本文对再生混凝土的结构及结构性能研究较少，还有待今后进一步研究。同时为了使再生混凝土的应用得到推广，还应为再生混凝土的施工制定一定的规范和标准，这需要政府的产业政策扶持和国家的法律法规保障。政府必须制定“强制性”的建筑垃圾处理的专项法规，以推动再生混凝土——这一新型绿色混凝土在我国的迅速发展。
With the rapid development of the building industry, the building waste produced in the architecture industry also increase rapidly, which influences the environment and is harm to the society. After waste concrete are crushed, removed impurities, classification, they can be used as recycled aggregates. The technology of using recycled aggregates to confect recycled concrete not only may resolve the environment pollution produced by the waste concrete, but also may save crude aggregates resource, and bring the prominent social benefit, economic benefit and environmental benefit. It is a sustainable development road that can save resources and energy, alleviate the earth environment load and support the ecosystem balance.
This paper summarizes that recycled concrete brings the influence to the environment and its domestic and international research status and development, and puts forward developing the recycled concrete technology is the need of social sustainable development. The paper designs a set of technics flow of producing recycled aggregates and uses scrap concrete in Wuchang vehicle factory to manufacture some recycled aggregates, and researches the basic properties of recycled aggregates such as apparent density, absorption, crush index, compacted density, porosity, etc. and analyses the properties change of recycled aggregates after the respective surface treatment with the polymer and polysilicone waterproofing agents, and then obtains the result that their absorption decreases and their properties improves after recycled aggregates are surface treated.
The paper designs some teams of different mix proportion concrete according to the different replacement of the recycled aggregates and fly ash, and researches their working properties and mechanical properties, and analyses influence factors of the working properties and the mechanical properties of the recycled concrete such as the replacement rate of recycled aggregates, the
replacement amount of fly ash, surface treatment of recycled aggregates, adding the high range water reducing agents and mineral admixture, etc.
The paper researches the durability of recycled concrete as to the sulphate-corrosion resistance, the permeability resistance, the frost-resistance, etc. and analyzes some factors, as to the replacement of recycled aggregates, the replacement of fly ash, the surface treatment of recycled aggregates, adding high range water reducing agent and mineral admixture, bring the influence to the properties of recycled concrete, and analyzes the economic feasibility of the application of the recycled concrete. It offers the advantageous support for the application of recycled concrete.
The paper researches less on the structures and the properties of the structures of recycled concrete, and it deserves further research. At the same time in order to extend the application of recycled concrete, some standards and criterions must be established for the construction of recycled concrete. It need the support of the governmental industry policy and the guarantee of national law and statute. The government must establish compulsory special statute for the treatment of building waste, to promote the quick development of recycled concrete, a sort of new-style green concrete, at our country.
引文
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[3] 侯景鹏，宋玉普，史巍．再生混凝土技术研究与应用开发．低温建筑技术，2001，2：9～11．
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[5] 杜婷，李惠强，吴贤国．再生混凝土的研究现状和存在的问题．建筑技术，34(2)：133～134
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[7] 杜婷，李惠强，覃亚伟．再生混凝土未来发展的探讨．混凝土，2002，4：49～51
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[10] Tang Luping, Lara-Olaf Nilsson. Rapid Determination of the Chloride Diffusivity in Concrete by Applying and Electrical Field. ACI Materials Journal, 1992, 9(1): 49～53
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[13] Limbachiya M C, Leelawat T, Dhir R K. Use of Recycled Concrete Aggregate in High-strength Concrete [J]. Materials and Structures, 2000, 33: 574～580
[14] Yamasaki Jujji, Tatemastsu, Kazuhiko. Strength and Freeze-thaw Resistance Properties of Concrete Using High-quality Recycled Aggregate [J]. Transactions of the Japan Concrete Institute, 1998, 20: 45～52
[15] 马嵘，姚民乐，詹锋．论再生混凝土在生态建筑中的意义．嘉兴学院学报，2003，6：52～55
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aggregates. Cement and Concrete Research, 2003, 33: 125～132
[18] T.C.Powers. A working Hypothesis for Further Studies of Frost Resistance of Concrete. ACI Joural, 1945, 16(4): 245～272
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[23] J.M.Aldred, S.Swaddiwudhipong, S.L.Lee and T.H.Wee. The effect of initial moisture content on water transport in concrete containing a hydrophobic admixture. Magazine of Concrete Research, 2001, 53(2): 127～134
[24] Andrade C, Sarria J, Alonso C. Relative Humidity in the Interior of Concrete Exposed to Natural Weathering [J]. CCR, 1999, 29: 1249～1259
[25] 杜婷，李惠强，周玉峰等．再生骨料混凝土基本特性的研究思路探讨．建筑技术开发，2002，29(6)：17～19
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[27] 史巍，侯景鹏．再生混凝土技术及其配合比设计方法．建筑技术开发，2001，28(8)：18～20
[28] Torben C, Hansen. Recycled Concrete Aggregate and Fly Ash Produce Concrete Without Portland Cement [J]. CCR, 1990, 20:355～356
[29] Parrott L J. Factors Influencing Relative Humidity in Concrete [J]. Magazine of Concrete Research, 1991,43(154): 45～52
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[2] 侯景鹏，史巍，宋玉普．再生混凝土技术的研究开发与应用推广．建筑技术，2002，33(1)：15～17．
[3] 侯景鹏，宋玉普，史巍．再生混凝土技术研究与应用开发．低温建筑技术，2001，2：9～11．
[4] 吴贤国，郭敬松，李惠强等．建筑废料的再生利用研究．建筑技术与应用，2004，1：21～23
[5] 杜婷，李惠强，吴贤国．再生混凝土的研究现状和存在的问题．建筑技术，34(2)：133～134
[6] 肖建庄，李佳彬，兰阳．再生混凝土技术研究最新进展与评述．混凝土，2003，10：17～21
[7] 杜婷，李惠强，覃亚伟．再生混凝土未来发展的探讨．混凝土，2002，4：49～51
[8] Shelburne Wayne M, Degroot Don J. Use of waste and recycled materials in highway construction. Civil engineering practice. 1998, 13(1): 5～16
[9] 邢振贤，周曰农．再生混凝土性能研究与开发思路．建筑技术开发，1998，25(5)：28～31
[10] Tang Luping, Lara-Olaf Nilsson. Rapid Determination of the Chloride Diffusivity in Concrete by Applying and Electrical Field. ACI Materials Journal, 1992, 9(1): 49～53
[11] 杜婷．建筑垃圾再生骨料混凝土性能及强化试验研究：[硕士学位论文]．武汉：华中科技大学，2002
[12] Topcu I B, Guncan N F. Using Waste Concrete as Aggregate. CCR, 1995,25(7): 1385～1390
[13] Limbachiya M C, Leelawat T, Dhir R K. Use of Recycled Concrete Aggregate in High-strength Concrete [J]. Materials and Structures, 2000, 33: 574～580
[14] Yamasaki Jujji, Tatemastsu, Kazuhiko. Strength and Freeze-thaw Resistance Properties of Concrete Using High-quality Recycled Aggregate [J]. Transactions of the Japan Concrete Institute, 1998, 20: 45～52
[15] 马嵘，姚民乐，詹锋．论再生混凝土在生态建筑中的意义．嘉兴学院学报，2003，6：52～55
[16] 黄士原等编著．近代混凝土技术．西安：陕西科学技术出版社，1998，209～211
[17] How-Ji Chen, Tsong Yen, Kuan-Hung Chen. Use of building rubbles as recycled
aggregates. Cement and Concrete Research, 2003, 33: 125～132
[18] T.C.Powers. A working Hypothesis for Further Studies of Frost Resistance of Concrete. ACI Joural, 1945, 16(4): 245～272
[19] 重庆建筑工程学院编著．混凝土学．北京：中国建筑工业出版社，1981，102～104
[20] 陈莹，严捍东，林建华等．再生骨料基本性质及对混凝土性能影响的研究．再生资源研究，2003，6，34～37
[21] 王武祥，刘立，尚礼忠等．再生混凝土集料的研究．混凝土与混凝土施工，2001，4，9～12
[22] 酱通混凝土用砂质量标准及检验方法(JGJ52-92)，北京：中国华龄出版社，1994
[23] J.M.Aldred, S.Swaddiwudhipong, S.L.Lee and T.H.Wee. The effect of initial moisture content on water transport in concrete containing a hydrophobic admixture. Magazine of Concrete Research, 2001, 53(2): 127～134
[24] Andrade C, Sarria J, Alonso C. Relative Humidity in the Interior of Concrete Exposed to Natural Weathering [J]. CCR, 1999, 29: 1249～1259
[25] 杜婷，李惠强，周玉峰等．再生骨料混凝土基本特性的研究思路探讨．建筑技术开发，2002，29(6)：17～19
[26] 李占印，再生骨料混凝土性能的试验研究：[硕士学位论文]，西安：西安建筑科技大学，2003
[27] 史巍，侯景鹏．再生混凝土技术及其配合比设计方法．建筑技术开发，2001，28(8)：18～20
[28] Torben C, Hansen. Recycled Concrete Aggregate and Fly Ash Produce Concrete Without Portland Cement [J]. CCR, 1990, 20:355～356
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