优质粉煤灰在预应力箱梁中的应用

Application of the high quality fly ash in the prestressing box beam

结合G323国道始兴跨线桥箱梁混凝土配合比设计过程,重点研究了利用优质粉煤灰配制高性能混凝土的多项工作特性,根据试验数据和相应的理论研究分析,揭示了粉煤灰对混凝土性能,特别是耐久性的影响规律,建立基于耐久性的混凝土配合比设计方法,以实现优质粉煤灰在桥梁预应力工程中的应用。

Combining with the concrete mixing ratio design process of the Shixing span box beam on the G323 national way, it emphatically studies the multiple project characteristics of utilizing the high quality fly ash producing the high performance concrete, according to the test data and corresponding theory research analysis, reveals the influencing law of the fly ash on concrete performance, especially the durability, establishes the concrete mixing ratio design method based on the durability, so as to realize application of the high quality fly ash in bridge prestressing project.