Study on Long-Term Performance of C80 Manufactured Sand High Performance Concrete

DOI

10.2991/978-94-6463-435-8_33How to use a DOI?

Keywords

manufacture sand; high performance concrete; mudstone powder; silica fume; nano-SiO2; long-term performance; micro-analysis

Abstract

By testing the resistance to chloride ion penetration and dry shrinkage performance combined with microscopic analysis, the effects of different machine-made sand mud powder content, silica fume and nano-SiO₂ content on the long-term performance of machine-made sand high-performance concrete were studied. The results show that the chloride ion penetration resistance of concrete increases with the increase of stone powder content and mineral admixture content, and decreases with the increase of mud powder content. Stone powder and mineral admixture can reduce the electric flux of concrete by 26.5% and 50.1% respectively. Similarly, silica fume and nano-SiO₂ can effectively reduce the drying shrinkage of concrete, while stone powder and mud powder will increase the drying shrinkage of concrete. From the microscopic analysis, it can be seen that stone powder can reduce the porosity of concrete and improve the compactness, while mud powder will increase the porosity of concrete. Silica fume and nano-SiO₂ can promote hydration to produce more products to effectively fill the internal structure and reduce the porosity of concrete, thus affecting the long-term performance of concrete to varying degrees.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Yong Hu
PY  - 2024
DA  - 2024/06/13
TI  - Study on Long-Term Performance of C80 Manufactured Sand High Performance Concrete
BT  - Proceedings of the 2024 5th International Conference on Civil, Architecture and Disaster Prevention and Control (CADPC 2024)
PB  - Atlantis Press
SP  - 295
EP  - 305
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-435-8_33
DO  - 10.2991/978-94-6463-435-8_33
ID  - Hu2024
ER  -