Abstract
Permeability is a significant and key property of concrete, and aggregate gradation is one factor that can affect the properties of concrete. Therefore, the aim of this study is to explore the improvement characteristics of nano-SiO2 on the microstructure and impermeability of concrete with different aggregate gradations. Two innovative test procedures have been applied in this research to obtain the parameters related to permeability: water permeability and real-time monitoring of water sorptivity. In addition, kernel density estimation and step function fitting are used to statistically characterize and quantify the microstructure features of samples. The results reveal that different aggregate gradations induce diverse types of defects. When the Fuller exponent (q) ranges from approximately 0.4–1.0, the microstructure of concrete is the densest and the impermeability is the strongest, in the meantime, the roles of nano-SiO2 become much clearer in weakening the connectivity of microdefects and improving the impermeability of concrete.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
