CAJ | 학술논문

采用模拟加速试验的方法，研究了氯盐环境下混凝土内部钢筋的锈蚀规律。运用先进的电化学测试手段，检测了混凝土内部钢筋在氯盐环境下的自锈蚀电流密度及电极电位量化指标，建立了锈蚀时间与钢筋锈蚀量的定量模型。用物理方式检测了氯盐环境下锈蚀钢筋的失重率，结合扫描电镜检测到的钢筋锈蚀层的微观结构及成分特点，揭示了钢筋的锈蚀机理及锈蚀特征。研究结果表明：钢筋在氯离子环境下腐蚀速率平均增加4～5倍，失重率比没有氯离子环境下提高了15％。由于氯离子的作用导致钢筋表面出现了局部不均匀的锈蚀层，是钢筋后期锈蚀急剧加速的直接诱因。
채용모의가속시험적방법，연구료록염배경하혼응토내부강근적수식규률。운용선진적전화학측시수단，검측료혼응토내부강근재록염배경하적자수식전류밀도급전겁전위양화지표，건립료수식시간여강근수식량적정량모형。용물리방식검측료록염배경하수식강근적실중솔，결합소묘전경검측도적강근수식층적미관결구급성분특점，게시료강근적수식궤리급수식특정。연구결과표명：강근재록리자배경하부식속솔평균증가4～5배，실중솔비몰유록리자배경하제고료15％。유우록리자적작용도치강근표면출현료국부불균균적수식층，시강근후기수식급극가속적직접유인。
This article adopts the method of simulated accelerated test and studies the regularity of cor-rosion of reinforcement in concrete in chlorine salt environment .It detects the corrosion current densi-ty and electrode potential quantitative indicators of the concrete reinforcing steel bar in chlorine salt environment and builds the quantitative model of the corrosion time and the amount of reinforcement corrosion with the advanced of electrochemical test methods .This article detects the weightlessness rate of the corrosion of reinforcement with the physical way and reveals the mechanism and the charac-teristics of the corrosion of steel bar with the microstructure and the component characteristics of rein-forcement corrosion layer using electron microscopy detected .T he research results prove that rein-forcement corrosion rate has increased by an average of 4 -5 times under chloride environment and weight loss ratio has increased by 15% compared with that under no -chloride environment .The re-sults also show that ,due to chlorine’s effect ,partial and uneven corrosion rust layer appears on sur-face of the reinforcement ,which will be the direct cause of inducing accelerating corrosion of rein-forcement at the later stage .