Typical effects of coarse and fine aggregates on the long-term properties of sea sand recycled aggregate concrete (SSRAC) are analyzed by a series of axial compression tests. Two different types of fine (coarse) aggregates are considered: sea sand and river sand (natural and recycled coarse aggregates). Variations in SSRAC properties at different ages are investigated. A novel test system is developed via axial compression experiments and the digital image correlation method to obtain the deformation field and crack development of concrete. Supportive results show that the compressive strength of SSRAC increase with decreasing recycled coarse aggregate replacement percentage and increasing sea sand chloride ion content. The elastic modulus of SSRAC increases with age. However, the Poisson’s ratio reduces after 2 years. Typical axial stress-strain curves of SSRAC vary with age. Generally, the effect of coarse aggregates on the axial deformation of SSRAC is clear; however, the deformation differences between coarse aggregate and cement mortar reduce by adopting sea sand. The aggregate type changes the crack characteristics and propagation of SSRAC. Finally, an analytical expression is suggested to construct the long-term stress-strain curve of SSRAC.

通过一系列轴压试验分析了粗骨料和细骨料对海砂再生骨料混凝土 (SSRAC) 长期性能的典型影响。考虑了两种不同类型的细（粗）骨料：海砂和河砂（天然和再生粗骨料）。研究了不同年龄的 SSRAC 特性的变化。通过轴压试验和数字图像相关方法开发了一种新型的测试系统，以获得混凝土的变形场和裂缝发展。支持性结果表明，SSRAC 的抗压强度随着再生粗骨料替代率的降低和海砂氯离子含量的增加而增加。SSRAC 的弹性模量随着年龄的增长而增加。然而，泊松比在 2 年后降低。SSRAC 的典型轴向应力-应变曲线随年龄而变化。一般来说，粗骨料对SSRAC轴向变形的影响是明显的；但是，采用海砂可以减小粗骨料和水泥砂浆的变形差异。骨料类型改变了 SSRAC 的裂纹特征和扩展。最后，提出了一个解析表达式来构建 SSRAC 的长期应力-应变曲线。