本文利用高效减水保塑剂、粉煤灰、膨胀剂等,设计了一种新型泵送钢管混凝土配合比,应用于江汉三桥中。介绍了泵送设备的配置、泵管的布置及施工注意事项等。施工证明采用该配合比配制的混凝土和易性好、可泵性好、坍落度损失低,能满足远距离运输和泵送的要求。现场留样和对钢管混凝土的检测表明该配合比具有高强、早强、自密实及补偿收缩等优点。 In this paper, the use of superplasticizer plasticizer, fly ash, expanders, designed a new pump concrete mix ratio, used in Jianghan Bridge. Introduced the configuration of pumping equipment, pump pipe layout and construction precautions. Construction proved that the ratio of concrete prepared with good workability, pumpability, slump loss is low, to meet the requirements of long-distance transport and pumping. Samples left on the spot and tests on concrete filled steel tubes show that the blending ratio has the advantages of high strength, early strength, self-compaction and compensating shrinkage.