Volume 14, No. 4, 2020
Received: 2020/09/29, Accepted:
Authors:
Sanjay Kumar; Baboo Rai;
Abstract:
Ingress of water or permeation is difficult to measure as the quality of concrete increases. In the case of High-Performance Concrete (HPC), it becomes more difficult. In HPC, the concrete skeleton becomes so dense that the measurement of water permeability procedure becomes very precise and accurate. HPC is broadly utilized to enhance the durability and performance of structures, but there are few test procedures ready to assess its permeability-related properties. In this study, compressive strength, ultrasonic pulse velocity (UPV) and water permeability of HPC with silica fume were measured. The experimental results revealed that compressive strength, as well as pulse velocity of concrete, increased with the increase in silica fume content at the same w/c ratio. A mathematical model is presented for estimating the compressive strength of high-strength concrete
incorporating silica fume. Subsequently, the synergistic effects of w/c ratio and silica fume (SF) on compressive strength, UPV and water permeability are statistically evaluated. This paper presents experimentally-based models with high coefficients of correlation in predicting the permeability and strength of HPC as a function
of mixture design parameters (water-binder ratio and %SF). Contour diagrams to facilitate the use of the models are also established.
Keywords:
Silica fume, Compressive strength, Permeability, UPV, Contour plots.