超高性能纤维增强水泥基复合材料的抗冲磨性能研究

Research on abrasion resistance strengths of ultra high performance fiber reinforced cementitious composites

水工泄洪建筑物的冲磨破坏现象较为普遍,给国家带来巨大的经济损失,而当前的技术手段并不能有效解决问题,迫切需要新材料和新技术的产生和应用.本文主要采用圆环法和水下钢球法研究了超高性能纤维增强水泥基复合材料(UHPFRCC)的抗冲磨性能.结果表明:UHPFRCC可实现高流动度(扩展度可达690 mm)、超高强度(28 d抗压强度可达190 MPa)、超高抗冲磨强度(28 d抗冲磨强度可达C50混凝土的5.5倍).

Damage of hydraulic structures caused by abrasion is very common and brings huge economic loss, however technologies available at present can hardly solve the problems effectively, so new materials and technologies are strongly needed. Ring tests and underwater steel balls methods are undertaken in this paper to research on the abrasion resistance strengths of UHPFRCC. The results indicate that UHPFRCC can be designed to have a very high flowability（reach a slump flow of 690 mm）, ultra high strengths（with compressive strength of 190 MPa at 28 d）, ultra high abrasion resistance strengths（5.5 times of C50 concrete at 28 d）.