云南腾冲地区火山灰混凝土与粉煤灰混凝土对比实验研究

Comparative Study on Pozzolanic Concrete and the Fly Ash Concrete Conducted at Tengchong County, Yunnan Province,China

通过火山灰混凝土与粉煤灰混凝土的工作性、强度及耐久性方面的比较实验研究,探讨两者的性能差异。研究表明,火山灰混凝土的工作性远不如粉煤灰混凝土,坍落度经时损失比较严重。相同配合比条件下,两种掺合料混凝土强度随时间变化趋势较为一致,但火山灰混凝土的抗氯离子渗透性能明显弱于粉煤灰混凝土。该研究旨在为当地火山灰混凝土替代传统的粉煤灰混凝土提供配合比设计参考。

Various comparative experiments were carried out to study the differences between the two types of concrete： pozzolanic concrete and the fly ash concrete in terms of their workability, strength and durability. The experiment results showed that the pozzolanic concrete had severe slump and far less workability than fly ash concrete during the same period. With the same mix proportioning and the same time period, both types showed the similar concrete strength. However, the fly ash concrete demon- strated better concrete dielectric flux permeability than that of the pozzolanic concrete. Some references for the mix proportioning of these two types of concrete were provided.