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Study on Long-Term Performance of C80 Manufactured Sand High Performance Concrete
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.
Study on Long-Term Performance of C80 Manufactured Sand High Performance Concrete
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.
Study on Long-Term Performance of C80 Manufactured Sand High Performance Concrete
Atlantis Highlights in Engineering
Liu, Peng (editor) / Bilgin, Hüseyin (editor) / Yang, Jialing (editor) / Hu, Bin (editor) / Hu, Yong (author)
International Conference on Civil, Architecture and Disaster Prevention and Control ; 2024 ; Xi'an, China
2024-06-14
11 pages
Article/Chapter (Book)
Electronic Resource
English
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