Through an actual engineering case of cast in-site box beams in a certain expressway construction, the paper has presented an application and effects study of double admixing technology in the mixing ratio of pump-delivered high-property concrete.

• 以某高速公路现浇箱梁工程为例,论述了双掺技术在泵送高性能混凝土配合比设计中的应用和实施效果。