High Performance Concrete and its Mixing Design

The concrete strength has been attached great importance to in projects for a long time,while the concrete deterioration caused by early and high strength cement,low production quality and abominable using environment has been neglected.And the concrete mix proportion is mainly designed to meet the need of strength.However,early concrete deterioration forces people to pay more attention to its durability.As durability is a key indicator for high performance concrete(HPC),HPC for different projects requires "different special performance combination ".Meanwhile,impermeability is the key indicator for general concrete;however,some erosion ion can still proliferate in HPC with high impermeability.Therefore,it is more reasonable to assess HPC durability according to ion proliferation coefficient.Aiming at the durability,the mix proportion design for HPC tries to meet the requirement of low ion proliferation in HPC.