【摘要】 研究大直径骨料(150 mm)自密实堆石混凝土Ⅰ型断裂性能的研究。分别制作了再生骨料和天然骨料试件各两个,进行三点弯Ⅰ型断裂试验。测得了起裂荷载、峰值荷载全曲线和曲线,同时计算了试件的断裂韧度、断裂能和。结果表明:天然骨料和再生骨料的Ⅰ型断裂性能具有一定的相似性,不改变作为混凝土材料的基本力学特征,再生骨料的制作工艺对其力学性能具有一定的影响,这可能与材料的黏结机理有关。研究结果对工程应用具有一定的意义。更多还原

【Abstract】 The large diameter aggregate(150 mm)research on self-compacting concrete pile properties of type Ⅰ fracture was stadied.Are made of the recycled aggregate and the specimen of the two,three point bending mode Ⅰ fracture tests.The measured crack initiation load,peak load of F-δ curve and the curve of F-CMOD,at the same time,fracture toughness,fracture specimens and calculation.The results showed that,Ⅰ type fracture properties of natural aggregate and recycled aggregate had a certain similarity,does not change as the basic mechanical characteristics of concrete materials,production process of recycled aggregate had a certain effect on its mechanical properties,which might be related with the mechanism of binding material.The study results were of certain significance for engineering applications.更多还原