Research on fatigue performance of rubber modified ultra high performance geopolymer concrete
Due to the fact that traditional ultra-high performance concrete(UHPC)contains a large amount of cement and steel fibers,its production process generates a high carbon footprint.In order to reduce the carbon footprint of UHPC,a rubber modified ultra-high performance concrete(R-UHPGC)was proposed by comprehensively utilizing waste rubber and steel fibers as partial fine aggregates and reinforcing fibers,and replacing cement with slag fly ash based polymers.Fatigue performance experiments were conducted on R-UHPC containing different rubber powder substitution rates(0,5％,20％,35％),and the effects of rubber powder content on crack width,fatigue deflection,and fatigue life were analyzed.The results show that with the increase of rubber powder content,the crack width first increases and then decreases.As the stress level increases,the fatigue life of R-UHPGC continues to decrease,but as the rubber content increases,the fatigue life also increases,the addition of rubber can significantly improve the fatigue life of R-UHPGC;established fatigue life prediction equations for R-UHPGC under different rubber dosages.
万方数据
维普
