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Abstract：
The development of island construction concrete can serve as a basis for the development and utilization of island resources. Complying with the principle of using local materials to configure seawater coral aggregate concrete (SCAC) that is able to meet the requirements of island and reef engineering construction could effectively shorten the construction period and cost of island and reef engineering construction. In this paper, quasi-static mechanical experiments and dynamic mechanical experiments were carried out on SCAC with different limestone powder contents. High-speed photography technology and Digital Image Correlation (DIC) were used to monitor the dynamic failure process and strain field of SCAC, and the influence of limestone powder content on the dynamic and static mechanical properties of SCAC was investigated. The results showed that, when the limestone powder content was 20% and 16%, the quasi-static compressive strength and quasi-static tensile strength exhibited the best improvement. Additionally, with increasing limestone powder content, the dynamic tensile strength of SCAC first showed and increasing trend and then a decreasing trend, reaching its maximum value when the limestone powder content was 16%. Moreover, the maximum strain value of SCAC with the same limestone powder content increased with increasing strain rate grade, showing an obvious effect on strain rate.
摘要：
开发海岛建筑混凝土可以作为开发和利用海岛资源的基础。遵循使用当地材料配置能够满足岛礁工程建设要求的海水珊瑚骨料混凝土（SCAC）的原则，可以有效缩短岛礁工程建设的工期和成本。在本文中,在不同石灰石粉含量的SCAC上进行了准静态力学实验和动态力学实验。采用高速摄影技术和数字图像相关技术(DIC)监测SCAC的动态失效过程和应变场,研究了石灰石粉含量对SCAC动态和静态力学性能的影响。结果表明,当石灰石粉含量为20%和16%时，准静态抗压强度和准静态抗拉强度表现出最好的改善。此外,随着石灰石粉含量的增加，SCAC的动态拉伸强度先呈现先上升后下降的趋势,当石灰石粉含量为16％时达到最大值。此外，相同石灰石粉含量的SCAC的最大应变值随应变率等级的增加而增加，对应变率有明显的影响。
