【摘要】 为了解决当前T梁混凝土配合比设计方法会明显增大水胶比、浆骨比以及对粗骨料的骨架作用重视不够的问题,以水胶比、胶浆体积和粗、细骨料体积为出发点,对高速公路24个预制梁场T梁C50混凝土配合比设计参数进行了统计分析。结果表明,水胶比、胶浆体积均具有较为固定的取值范围,且细骨料体积与粗骨料体积存在一定线性回归关系。基于此,提出了基于体积法设计T梁C50混凝土配合比的方法,并通过具体计算实例验证了这一方法的可靠性和有效性。更多还原

【Abstract】 To solve the problems existing in current mix proportion design of T-beam concrete,such as obvious high water-binder ratio and paste-aggregate ratio,as well as insufficient emphasis on the framework role of coarse aggregate,this paper takes water-binder ratio,cementious paste volume,coarse aggregate and fine aggregate volume as the starting points,and analyses statistically the mix proportion parameters of T-beam C50concretes from 24prefabricated fields.The results show that the values water-binder ratio and cementious paste volume separately fixed in a certain range,and a definite linear regression relation exists between the fine aggregate volume and coarse aggregate volume.Based on the results,the mix proportion design of T-beam C50concrete is developed by using absolute volume method.Moreover,this design method is verified to be reliable and effective by calculational examples.更多还原