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

“多细裂纹高性能纤维增强胶凝复合材料”（HPFRCC）是一种具有较窄裂缝的防水材料。本研究通过在细密裂缝中填充海藻凝胶（海藻酸钙凝胶）进一步提高HPFRCC的水密性。对混凝土挡土墙上的HPFRCC进行了5年的观察。HPFRCC的裂缝宽度大多限制在不超过0.1 mm。利用HPFRCC材料制作特殊砌块，使其在大地震中因结构滑动而产生较大变形。

"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.