陕西汉中潘家河大桥是中承式钢管混凝土公路拱桥,为保障钢管内的泵送混凝土性能达到设计要求,特进行了40号泵送微膨胀混凝土配合比的设计与试验研究,得出了优化合理的高性能混凝土的配合比,为工程现场泵送微膨胀混凝土施工提供了可靠的技术依据。 Hanzhong Panjiahe Bridge in Shaanxi Province is a half-through CFST arch bridge. In order to ensure the performance of the pumping concrete in steel pipe to meet the design requirements, the design and experimental study on the mix proportion of the 40-pumped micro-expansive concrete is carried out. The optimized and reasonable The mix proportion of high-performance concrete provides a reliable technical basis for pumping micro-expansive concrete at the construction site.