- 張志豪1,2,陳露一1,2,黃有強1,2,蓋珂瑜1
2022年第7期
摘要
引用本文
摘 ? 要:通過加速劣化試驗方法研究了超高性能混凝土(UHPC)在模擬海洋侵蝕環境下的力學和耐久性能。結果表明:海水養護下UHPC的力學性能受開始浸泡時間的影響較小,長期力學性能發展比較穩定;UHPC具有良好的適應性和耐久性能,凍融循環對UHPC性能的影響相對較大,但介質類型對其性能的影響較??;隨著硫酸鹽干濕循環次數的增加,UHPC的相對動彈性模量和抗壓強度耐蝕系數先增加后降低,質量損失增加;硫酸鹽干濕循環會導致UHPC表面露出的鋼纖維銹蝕,但內部結構無損傷,鋼纖維與基體結合緊密。
Abstract: The mechanical properties and durability of ultra-high performance concrete(UHPC) under marine environment were investigated by accelerated deterioration test. The results show that the mechanical properties of UHPC under seawater curing are less affected by the initial immersion time, and the long-term mechanical properties are relatively stable. UHPC has good adaptability and durability. Freeze-thaw cycles have a relatively large effect on UHPC performance, but media type has less effect on UHPC performance. With the increase of the number of dry and wet cycles of sulfate, the relative dynamic elastic modulus and compressive strength corrosion resistance coefficient of UHPC first increase and then decrease, and the mass loss increases. The dry and wet cycles of sulfate lead to steel fiber corrosion on the surface, but the internal structure is not damaged, and the steel fiber is closely combined with the matrix.
張志豪,陳露一,黃有強,等.海洋侵蝕環境下超高性能混凝土的力學與耐久性能研究[J].混凝土與水泥制品,2022(7):1-4,9.
ZHANG Z H,CHEN L Y,HUANG Y Q,et al.Study on Mechanical Proporties and Durability of Ultra-high Performance Concrete Under Marine Erosion Environment[J].China Concrete and Cement Products,2022(7):1-4,9.