| 摘要: |
| 研究了再生粗骨料含水状态（绝干、气干及饱和面干）对新拌混凝土流变性能的影响规律，同时对其早期力学性能和耐久性能进行了测试.结果表明：再生粗骨料的含水状态对新拌混凝土流变性能影响较大，拌和物中自由水的含量虽然对新拌混凝土的动态屈服应力影响不大，但会显著影响其静态屈服应力和塑性黏度；相对于其他2种含水状态，气干状态下的再生粗骨料对混凝土抗压强度产生的不利影响最小. |
| 关键词: 再生混凝土 含水状态 流变性能 抗压强度 抗氯离子渗透性能 |
| DOI：103969/j.issn.1007 9629202103014 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51708419)；中央高校基础研究经费专项资金资助项目 |
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| Effect of Moisture Condition of Recycled Coarse Aggregate on the Properties of Concrete |
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DUAN Zhenhua, JIANG Shanshan, XIAO Jianzhuang, HOU Shaodan, CHEN Xianglei
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Department of Structural Engineering, Tongji University, Shanghai 200092, China
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| Abstract: |
| The influence of moisture condition(oven dry, air dry, saturated surface dry) of recycled coarse aggregate on the rheological properties of fresh concrete was studied, and the early mechanical and durability properties were also tested. The results show that the moisture condition of recycled coarse aggregate plays a significant part in the rheological properties of fresh concrete. Although the free water content of the fresh concrete has little effect on the dynamic yield stress of fresh concrete, it can significantly affect the corresponding static yield stress and plastic viscosity. Besides, the recycled coarse aggregate in air dry condition has the least adverse effect on compressive strength among all the 3 conditions examined in this study. |
| Key words: recycled coarse aggregate concrete moisture condition rheological property compressive strength resistance to chloride ion penetration |
