1概述武广高速铁路建设中大量采用耐久性混凝土技术,其中混凝土结构物种类、数量大部分都是大体积结构。在施工中防止混凝土发生收缩,避免形成裂缝,导致混凝土开裂从而严重影响混凝土结构物耐久性尤为重要。武广高速铁路使用的混凝土配合比设计具有以下特 1 Overview Wuhan-Guangzhou high-speed railway construction in a large number of durable concrete technology, including concrete structure types, the majority are large-volume structure. In the construction of concrete to prevent shrinkage, to avoid the formation of cracks, leading to concrete cracking and thus seriously affect the durability of concrete structures is particularly important. Wuhan-Guangzhou high-speed railway with concrete mix design has the following special