中文摘要：

为了解决钢管混凝土结构高性能填充材料的制备问题,选用高强水泥、粉煤灰、硅灰、膨胀剂、页岩陶粒、页岩陶砂与天然砂组成的混合细集料、高效减水剂和增稠剂制备出具有轻质、微膨胀和自密实性能的高强混凝土,设计18个试验组对比分析了混合细集料中天然砂体积分数、胶凝材料用量和体积砂率对混凝土工作性能、物理力学性能和硬化变形性能的影响规律. 研究结果表明：选用上述原材料,采用内掺法和松散体积法进行掺合料和混合细集料用量设计,调整混合细集料中天然砂和陶砂的体积比来改良颗粒级配,每m3混凝土掺入540～570kg胶凝材料,体积砂率取值47%左右,可制备出适用于钢管轻集料混凝土结构的高性能填充轻集料混凝土.

英文摘要：

In order to provide a kind of high performance filling material for the lightweight aggregate concrete filled steel tube, 18 experimental groups were designed for the material experiment. The raw material included the high strength cement, the fly ash, the silica fume, the expansive agent, the shale haydite and the mixed fine aggregate composed of the shale pottery and the natural sand.The high strength, lightweight, slight expansion and self-compacting concrete was prepared.The influence law of the volume fraction of the shale pottery in the mixed fine aggregate, the amount of cementitious materials and the volume rate of sand of concrete’s working performance, physical mechanical properties and hardening deformation was comparatively analyzed. The results show that the filling lightweight aggregate concrete of high performance can be prepared for the lightweight aggregate concrete filled steel tube by using of the aforesaid raw material. The amount of the admixture and the mixed fine aggregate can be designed by using of the substitute incorporation and the loose packing theory. The grain composition can be modified by adjusting the volume ratio between the natural sand and pottery in the mixed fine aggregate. The proper cementitious materials’ amount is 540-570kg per cubic metre in the concrete. The suitable value of volume rate of the sand is about 47%.