预应力大体积混凝土配合比优化设计研究

Study of mixture ratio optimization of mass prestress concrete

针对青岛国际会展中心二期工程大体积预应力混凝土要求低热、抗裂、早强和耐久的特点,在确定了混凝土配合比设计的基本原则后,对配合比进行了性能试验,对混凝土的早期强度、碳化、氯离子扩散、收缩及抗裂性能等指标进行了试验测试,并在工程中实际应用,取得了较好的效果.

This paper studies the mass prestress concrete from Qingdao International Convention Center project. The mass prestress concrete wants lower hydratization heat, higher crack resisting ability, early-strength and durability. Under the basic design principle of ratio of mixture, the performance tests of the concrete mixture ratio, concrete early-strength, carbonation, the chlorine ion diffusion, concrete shrinkage, crack-resistant property etc. are carried out. All of these get good results in construction practice.