压浆混凝土中的缺陷与配合比的改进

Defect in Post - placed Aggregitte Concrete and Improvement of the Mix Proportion

对压浆混凝土存在的强度偏低现象进行了研究，指出了泌水量大是压浆混凝土强度较低的主要原因。在此基础上研究了压浆混凝土的配合比，证明掺加粉煤灰及复合外加剂可显著减少压浆混凝土的泌水量，提高混凝土的强度，并可减少水泥用量。

This paper studies the reasons for low strength of post- placed aggregate concrete, and points o at that great bleeding is the main reason for low strength of the concrete. Based on above-mentioned, mix proportion of the concrete is studied, it proved that using of fly ash and composite admixture can greatly decrease the bleeding, greatly increase the strength, and decrease the cement content.