| 摘要: |
| 对比了采用不同拌和用水（自来水、海水）及不同种类的砂（河砂、淡化海砂、海砂）拌和的碱激发矿渣混凝土（AASC）和普通水泥混凝土（OPCC）在模拟海水浸泡过程中的强度变化，同时通过电化学法加速钢筋锈蚀，研究了AASC中钢筋早期锈蚀状况.结果表明：在Cl-侵蚀过程中，经蒸压养护的AASC表现出比OPCC更高的强度和更优异的耐腐蚀性能；在42d测试龄期时，OPCC中钢筋锈蚀情况明显比AASC严重，钢筋失重率约为50%~90%，而AASC的钢筋失重率仅为02%~15%；同时还借助扫描电镜SEM测试方法分析探索了蒸压养护下AASC性能提高的机理. |
| 关键词: 碱激发矿渣混凝土 蒸压养护 钢筋锈蚀 海水 海砂 |
| DOI：103969/j.issn.1007 9629201802008 |
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| Early Corrosion Behavior of Rebar Embedded in the Autoclave CuredAlkali Activated Slag Concrete |
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JIANG Zhengping1, MING Wei2
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1.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China;2.Guangdong Hongji Concrete Pile Co., Ltd., Zhongshan 528427, China
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| Abstract: |
| Experimental tests were reported on the autoclave cured alkali activated slag concrete(AASC) and ordinary Portland cement concrete(OPCC), fabricated with different kinds of mixing water(tap and seawater) and sand(river sand, desalted sea sand, sea sand), immersing in simulated seawater. The results of mechanical strength development of concrete and mass loss ratio of rebar during the corrosion of rebar embedded in the concrete accelerated through electrochemical method reveal that AASC has higher compressive strength and corrosion resistance than OPCC. More sever corrosion behavior can be observed for rebar in OPCC, for the mass loss ratio increases to 50%90% at 42d, while that is only 02%15% for AASC. Meanwhile, scanning electron microscope（SEM） is also used to explore the superior performance mechanism of AASC. |
| Key words: alkali activated slag concrete autoclave curing rebar corrosion sea water sea sand |
