海工高耐久自密实混凝土的研制

Development of the high-durability and self-compacting concrete in marine environment

针对跨海桥梁工程特点与环境条件,采取七元组分设计混凝土配合比,通过限制骨料含量、采用低水胶比、复掺磨细矿粉与Ⅰ级粉煤灰以及外掺聚羧酸系高性能减水剂等技术措施,配制出适合海洋环境条件、中等强度等级、具有良好体积稳定性的高耐久自密实混凝土。

Aiming at the characteristics and environmental conditions of cross-sea bridge project,we achieved a high-durability self-compacting concrete by adopting seven-component mix design and technical measures including limiting the aggregate content, using low water-cement ratio,double-doped pulverized slag and grade I fly ash and with polycarboxylate-type high-performance water reducer. The produced concrete is suitable for marine environmental conditions,has moderate-intensity level and good volume stability.