International collaboration for structural applications and crack-filling methods of HPFRCC (High Performance Fiber Reinforced Cementitious Composites with multiple fine cracks)

HPFRCC（具有多个细裂纹的高性能纤维增强水泥基复合材料）结构应用和裂缝填充方法的国际合作

• 批准号: 20360190
• 负责人: ROKUGO Keitetsu
• 金额: $ 11.73万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360190/
• 关键词: 土木材料; コンクリート; ひび割れ; 繊維補強; 止水

"High performance fiber-reinforced cementitious composite with multiple fine cracks" (HPFRCC) is a watertight material because the cracks are narrow. In this study, the water-tightness of HPFRCC was further improved by filling seaweed gel (calcium alginate gel) into the fine cracks. The HPFRCC splayed on a concrete retaining wall was observed over 5 years. The crack width in the HPFRCC was mostly limited to not more than 0.1 mm. Special blocks, which are capable of having large deformation due to slide of structures during a huge earthquake, were fabricated using HPFRCC.

具有多条细裂纹的高性能纤维增强水泥基复合材料(HPFRCC)是一种防水材料，因为裂纹较窄。在本研究中，将海藻凝胶(海藻酸钙凝胶)填充到细小裂缝中，进一步提高了HPFRCC的水密性。对混凝土挡土墙上展开的高性能混凝土进行了长达5年的观测。高性能碾压混凝土的裂缝宽度大多被限制在不超过0.1 mm。利用HPFRCC制作了能够在大地震中因结构滑动而产生较大变形的特殊砌块。

项目成果

Tensile behavior of synthetic fiber-reinforced strain-hardening cement-based composite (SHCC) after freezing and thawing exposure

• DOI: 10.1016/j.coldregions.2011.02.002
• 发表时间: 2011-06
• 期刊: Cold Regions Science and Technology
• 影响因子: 4.1
• 作者: H. Yun;Sun-Woo Kim;Young-Oh Lee;K. Rokugo

Crack-damage mitigation of RC one-way slabs with a strain-hardening cement-based composite layer

• DOI: 10.1680/macr.2011.63.7.493
• 发表时间: 2011-07
• 期刊: Magazine of Concrete Research
• 影响因子: 2.7
• 作者: H. Yun;K. Rokugo;T. Izuka;S. Lim

Improvement in Water Tightness of Fine Cracks in HPFRCC Using Seaweed Gel

使用海藻凝胶改善 HPFRCC 细裂纹的水密性

• 发表时间: 2008
• 期刊: Proc. of 8hsc-hpc, Tokyo
• 作者: K.Rokugo;Y.Asano;H.Kato;Y.Takahashi;K.Kobayashi
• 通讯作者: K.Kobayashi

緩衝ブロック

缓冲块

• 发表时间: 2010

膨張材の多量混入による鉄筋補強HPFRCC はり部材のひび割れ性状の改善

掺入大量膨胀材料改善HPFRCC梁构件的开裂性能

• 发表时间: 2010
• 期刊: 土木学会論文集E Vol.66, No.3
• 作者: 高田浩夫;高橋祐二;阪口裕紀;小林孝一;六郷恵哲
• 通讯作者: 六郷恵哲