Development of Self-Compacting concrete Using Whole Recycled Materials from Demolished Concrete Structure as Aggregate and Powder by High grade Recycling System

高品位回收系统以拆除混凝土结构的全部回收材料为骨料和粉末开发自密实混凝土

• 批准号: 17560408
• 负责人: MIZUGUCHI Hiroyuki
• 金额: $ 2.18万
• 依托单位: The University of Tokushima
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560408/
• 关键词: Construction Materials; Concrete; Recycling; Recyclic resources; High grade concrete

It is investigated that the mechanical properties, the length change and the resistance to freezing and thawing of the self-compacting concrete using whole recycled aggregate and powder from a part of wall of a concrete structure which was build in 1950's in Tokyo.The recycled materials used were divided into three sizes such as coarse aggregate, fine aggregate large and fine aggregate small. The properties of recycled coarse aggregate are satisfied the standard on recycled coarse aggregate of class H of JIS. The properties of fine aggregate large and fine aggregate small are nearly satisfied the class M of the draft JIS, respectively. A recycling equipment was used an eccentric rotor.The 10 mixes were selected having 65±55cm in slump flow using the same proportion of three recycled aggregates from the demolished concrete structure.As the results, it is obtained the self-compacting concretes using whole recycled aggregates. The compressive strength and Young's modulus of recycled concretes are satisfied the required value at the ages of 28 days in JASS 5, respectively. The length change of the recycled concretes with an expansive additive are satisfied the required value at the ages of 28 days in JASS 5. The resistance to freezing and thawing of recycled self-compacting concretes are not satisfied the required level.It is considered that the recycled self-compacting concretes using whole recycled materials are applicable to normal concrete structure in consideration for using method such as area, part of structure etc.

对采用全再生骨料和部分墙体粉料自密实混凝土的力学性能、长度变化和抗冻融性能进行了研究。将再生材料分为粗骨料、细骨料大颗粒和细骨料小颗粒三种尺寸。再生粗集料的各项性能均达到JIS H级再生粗集料标准。细骨料大骨料和细骨料小骨料的性能分别接近JIS草案的M级。采用偏心转子式再生设备，选取坍落度为65±55 cm的10个混合料，按相同比例从拆除的混凝土结构中提取3块再生骨料制成自密实混凝土。在JAS5中，再生混凝土28d龄期的抗压强度和杨氏模量值分别满足要求。掺加膨胀剂的再生混凝土28d龄期的长度变化满足JAS5的要求，再生自密实混凝土的抗冻融性能达不到要求，综合考虑面积、局部结构等方法，认为全再生材料再生自密实混凝土适用于普通混凝土结构。

项目成果

A study on properties of low treated recycled aggregate concrete using mixing method with oscillation and waterproof aeent

振荡防水搅拌法低处理再生骨料混凝土性能研究

• 发表时间: 2006
• 期刊: Proc.of The Tenth Asia-Pacific Conference on Structural Engineeing & Construction
• 作者: Nishikawa;H.;Kohji Nishikawa;水口 裕之;Sayaka Nishibata;渡邉 健;Heng Nhar
• 通讯作者: Heng Nhar

再生骨材を全量用いた高流動コンクリートの基礎的性質

再生骨料高流动性混凝土的基本性能

• 发表时间: 2006
• 期刊: セメント・コンクリート研究討論会論文報告集 No.33
• 作者: Nishikawa;H.;Kohji Nishikawa;水口 裕之
• 通讯作者: 水口 裕之

Evaluation of fracture in concrete with recycle aggregate by acoustic emission

声发射评价再生骨料混凝土断裂

• 发表时间: 2006
• 期刊: International Journal of Modern Physics B Vol. 20・No. 25
• 作者: Matsumoto Y.;Yamaguchi H.;Tomida N.;Kato T. and Khakimov A.;小野寺 誠司;橋本 親典;Nhar Heng;Seiji Onodera;Chikanori Hashimoto;Nhar Heng;小野寺 誠司;橋本 親典;Nhar Heng;芝崎 圭佑;Sayaka Nishibata
• 通讯作者: Sayaka Nishibata

Mechanical Properties of SM-Compaction Concrete Using Recycled Materials from Demolished Concrete Structure as Aggregate and Powder

以拆除混凝土结构回收材料为骨料和粉末的 SM 压实混凝土的力学性能

• 发表时间: 2007
• 期刊: Proc. of 5th International RILEM Symposium (in press)
• 作者: Nishikawa;H.
• 通讯作者: H.

Mechanical Properties of Silf-Compaction Concrete Using Recycled Materials from Demolished Concrete Structure as Aggregate and Ppwder

拆除混凝土结构再生料作为骨料和颗粒的粉砂混凝土力学性能

• 发表时间: 2007
• 期刊: Proc.of 5th International RILEM Symposium, (in press)
• 作者: Nishikawa;H.;Kohji Nishikawa
• 通讯作者: Kohji Nishikawa