论文部分内容阅读
本文通过大量的试验对特细砂——石灰石屑混和细集料砂浆和混凝土的强度进行了较为系统的研究.研究结果表明:混和砂混凝土具有比特细砂和净石屑混凝土更为优良的结构和性能.作者采用了一种新的对比实验方法——“砂浆稠度法”研究了在相同工作性对混和砂和特细砂两种混凝土的力学性能,并用“微混凝土模型”较好地解释了石灰石屑对砂浆或混凝土性能的改善作用.研究表明,混和砂混凝土之听以具有优良的性能,在于其孔结构得到了很好的改善.石灰石屑不但具有较好的大中心质效应,并且由于它的表面活性使大介质效应也得到很好的发挥.
In this paper, through a large number of experiments, the strength of ultra-fine sand, limestone shavings mixed fine aggregate mortar and concrete has been systematically studied. The results show that mixed sand concrete has a fine structure of bit fine sand and fine stone concrete. And the performance. The author adopted a new comparative experiment method - “The mortar consistency method” studied the mechanical properties of the mixed concrete and super fine sand concrete at the same workability, and explained it better with “micro concrete model”. The effect of limestone shavings on the performance of mortar or concrete has been studied. Research shows that the mixed sand concrete has excellent performance in that its pore structure is well improved. Limestone shavings not only have a good large centric effect, but also Because of its surface activity, the large medium effect is also played well.