Mechanical and Durability Properties of High-Performance Concrete in Corrosive Medium of Vietnam

Abstract

AbstractNowadays, High-performance concrete (HPC) has been used to gradually alternative ordinary conventional concrete for structures exposed to harsh environments to improve the long-term durability of concrete. The principal aim of this research was to utilize industrial waste by-products like fly ash, silica fume as an addition to cement at different rates incorporating quartz powder in HPC mixes for application in concrete structures subjected to severe environmental conditions. The corrosion resistance of HPC was examined by the mass and compressive strength loss of 15 × 15 × 15 cm3 cubes immersed in seawater and saline-alkaline environments. The result experimental indicates that an optimum mixture could be achieved with the use of 12.5% SF, 20% FA for cement substitution, and 20% Qp substitute sand. The compressive strengths of all mixes curing in potable-water obtained varies between 70.76 and 91.15 MPa at 28th days, these values gained 78.1 to 101.6 MPa at 540th days. Compared to cubes immersed in freshwater, similar compressive strength values have been received reduced from 0.13 to 2.78% strength for seawater environment, whereas exposed to saline-alkaline medium has decreased from 0.13 to 2.78% and mass loss ranges from 0.11 to 2.1% of specimens, after curing period 540 days. It is observed that the HPC produced with locally available materials in Vietnam proved its excellent mechanical and durability properties. In the future, HPC will be used vastly in the construction industry, as well as for concrete structures exposed to synthetic corrosive medium similar to Vietnam.KeywordsHigh-performance concreteMechanicalDurabilityCorrosionCorrosive medium