Affiliation:
1. Southeast University
2. Jiangsu Academy of Builing Science Co., LTD
Abstract
The underwater performance deterioration of different mineral admixtures concrete was tested through the indoor immersion experiment. The effect and mechanism of fly ash and slag powder were studied after 360d’s immersion. The performance deterioration and internal structure changes were analyzed with chloride ion content, ultrasonic test, SEM scan and X-CT technology. The results showed that mineral admixtures can refine the pore structure and block the channel in the concrete. The mineral admixture (especially FA) can help to resist chloride penetration. The ultrasonic velocity of C50F and C50S increased first, and then decreased after 160d and 50d, respectively. After 360d’s corrosion, the porosity (holes with diameter greater than 30μm) of three samples all increased, but the shape of holes for mineral admixture concrete changed significantly. Among them, the adding of SL had greater effect on the porosity.
Publisher
Trans Tech Publications, Ltd.
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