【摘要】 基于活性粉末混凝土设计理论,采用紧密堆积及最小需水量法,以水淬高钛矿渣代替石英砂为细骨料制备了无钢纤维活性粉末混凝土(TS-RPC),研究了TS-RPC力学性能和浆-骨界面结构。结果表明,在水泥浆体富余系数为1.3时,TS-RPC力学性能最佳。标准养护条件下,所制备的TS-RPC 28 d抗压强度达79.8 MPa、抗折强度达17.3 MPa; 80℃蒸汽养护48 h时,TS-RPC抗压强度达到107.0 MPa、抗折强度达到18.4 MPa。蒸汽养护条件下,TS-RPC浆-骨界面更为致密,这是由于水淬高钛矿渣与水泥水化产物Ca(OH)2在界面处发生了火山灰反应。更多还原

【Abstract】 Based on the design theory of reactive powder concrete,water-quenched titanium slag was used as fine aggregates to replace quartz sands to prepare reactive powder concrete without steel fibers( TS-RPC) through compact stacking and minimum water demand methods. Results show that the optimized mechanical properties of TS-RPC will be obtained when the cement paste surplus coefficient is 1. 3.Compressive strength and flexural strength of the TS-RPC will reach 79. 8 MPa and 17. 3 MPa after 28 days of standard curing,respectively. Furthermore,compressive strength and flexural strength of the prepared TS-RPC can reach 107. 0 MPa and 18. 4 MPa after steam curing at 80 ℃ for 48 h,respectively.Interfaces between hardened cement pastes and aggregates under steam curing become much more compact compared with that of TS-RPC cured in standard condition,which is mainly due to the pozzolan reaction between water-quenched titanium slag and Ca( OH)2 in the interface.更多还原