论文部分内容阅读
与普通骨料相比,陶粒具有轻质、多孔的特点,降低了混合骨料混凝土的碳化性能。采用加速碳化试验,研究了自密实混合骨料混凝土碳化性能。试验结果表明:2种自密实混合骨料混凝土加速碳化深度随着水胶比增加在增加,其增加值在不同水胶比范围内有明显差异;同水胶比混凝土加速碳化深度由大到小顺序为:自密实轻骨料混凝土和自密实混合骨料混凝土,其中筒压强度高的陶粒配制自密实混合骨料混凝土与自密实混凝土同龄期的加速碳化深度相当;同强度等级混凝土加速碳化深度由大到小顺序为:自密实混凝土、自密实混合骨料混凝土和自密实轻骨料混凝土。
Compared with ordinary aggregate, ceramsite has the characteristics of light weight and porosity, reducing the carbonation performance of mixed aggregate concrete. Accelerated carbonation test was used to study the carbonation of self-compacting mixed aggregate concrete. The results show that the accelerated carbonation depth of the two kinds of self-compacting mixed aggregate concrete increases with the increase of the water-cement ratio, and the added value of the two kinds of self-compacting aggregate concrete has obvious difference in the range of water-cement ratio. The order is: self-compacting lightweight aggregate concrete and self-compacting mixed aggregate concrete, of which the compressive strength of ceramsite self-compacting mixed aggregate concrete is equivalent to that of self-compacting concrete at the same age; The descending order of depth is self-compacting concrete, self-compacting aggregate concrete and self-compacting lightweight aggregate concrete.