结合襄十高速公路的实际情况 ,对试制 T型梁中出现的问题进行了深入的分析。并且通过改变集料的破碎工艺 ,优化混凝土的配合比 ,改进混凝土浇筑、养护等工艺成功地用当地辉绿岩碎石配制了 C5 0高强混凝土 ,并在 T型梁预制工程中得到广泛应用 Combined with the actual situation of Xiang-Shih Expressway, the problems in trial-manufacture T-beam were analyzed in depth. And by changing aggregate crushing process, optimizing the mix ratio of concrete, improving concrete pouring, curing and other processes successfully using the local diabase gravel prepared C5 0 high-strength concrete, and T-beam precasting has been widely used