| 摘要: |
| 通过降低水胶比，采用钢纤维和硅灰协同调控强度的方法，制备超高强度橡胶混凝土（UHSRC），并利用电液伺服万能试验机对其开展静态压缩试验.结果表明：UHSRC的抗压强度最大可达125.7 MPa，甚至当橡胶取代率高达30%时，抗压强度仍不低于60.0 MPa；UHSRC的抗压强度和应力增长率表现出橡胶取代率弱化效应，然而其破坏程度和韧性指数表现出橡胶取代率增强效应和粒径弱化效应；UHSRC的输入能、弹性能，以及耗散能增长率和最大值均具有橡胶取代率弱化效应；随着橡胶取代率的增加，UHSRC的弹性能比率增大，耗散能比率减小；随着橡胶粒径的增大，UHSRC的弹性能比率先减小后增大，耗散能比率先增大后减小. |
| 关键词: 超高强度橡胶混凝土 静态压缩 力学特性 破坏特征 韧性 能量演化 |
| DOI：10.3969/j.issn.1007-9629.2023.06.006 |
| 分类号:TU501 |
| 基金项目:国家自然科学基金资助项目（52074009，52008003）；安徽理工大学高层次引进人才科研启动基金资助项目（2022yjrc84） |
|
| Mechanical Properties and Energy Evolution of Ultra High Strength Rubber Concrete |
|
XU Ying1,2, LIU Jiaxing1, YANG Rongzhou1, DING Jinfu1, GU Keke1
|
|
1.School of Civil Engineering and Architecture， Anhui University of Science and Technological， Huainan 232001， China;2.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines， Anhui University of Science and Technology， Huainan 232001， China
|
| Abstract: |
| By reducing the water-binder ratio， using the method of steel fiber and silica fume to adjust the strength， ultra high strength rubber concrete （UHSRC） was prepared， and its static compression test was carried out by electro-hydraulic servo universal testing machine. The results show that the compressive strength of UHSRC can be increased to 125.7 MPa at most， and even when the rubber substitution rate is as high as 30%， the compressive strength is still not less than 60.0 MPa. The compressive strength and stress growth rate of UHSRC show the weakening effect of rubber substitution rate ， while failure degree and toughness show rubber substitution rate reinforcement effect and particle size weakening effect. The growth rate and maximum value of input energy， elastic energy and dissipated energy of UHSRC all have the weakening effect of rubber substitution rate. With the increase of rubber substitution rate， the elastic energy ratio of UHSRC increases and the dissipated energy ratio decreases. With the increase of rubber particle size， the elastic energy ratio of UHSRC first decreases and then increases， and the dissipated energy ratio first increases and then decreases. |
| Key words: ultra high strength rubber concrete（UHSRC） static compression mechanical property failure characteristic toughness energy evolution |
