海水环境下水泥胶砂抗氯离子渗透性能的试验研究
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摘要
本文研究了不同浓度的海水对水泥胶砂抗氯离子渗透性能的影响,并采用SEM扫描电镜对试件侵蚀的微观机理进行了分析。研究结果表明:随着海水浓度的提高,水泥胶砂抗氯离子渗透性能呈加速下降的趋势;SEM结果显示海水侵蚀导致水泥胶砂表面出现微裂缝和微孔洞,并削弱了试样中骨料和凝胶的结合作用。
In this paper, how sea-water of different concentration influence the anti-chloride ion permeability of cement mortar has been studied, and micro-mechanism of erosion on specimen has been analyzed with the application of scanning electron microscope. The result of the research shows that the anti-chloride ion permeability of cement mortar weakens in accelerated rate when sea-water concentration increases, and pictures taken from SEM display micro-cracks and micro-holes in cement mortar specimen caused by sea-water erosion, and the erosion also weakened the combination between aggregate and gel of the cement mortar specimen.
In this paper, how sea-water of different concentration influence the anti-chloride ion permeability of cement mortar has been studied, and micro-mechanism of erosion on specimen has been analyzed with the application of scanning electron microscope. The result of the research shows that the anti-chloride ion permeability of cement mortar weakens in accelerated rate when sea-water concentration increases, and pictures taken from SEM display micro-cracks and micro-holes in cement mortar specimen caused by sea-water erosion, and the erosion also weakened the combination between aggregate and gel of the cement mortar specimen.
引文
[1]迟培云,王大成等.混凝土构筑物在海水中的腐蚀极其防护[J].青岛建筑工程学院学报,2004(2):5-10.
[2]陈国新,杜志芹,等.聚羧酸系减水剂用于水下不分散混凝土的研究[J].混凝土,2012(2):117-123.
[3]黄士元,孙富强,等.混凝土科学-有关近代研究的专论[M].北京:中国建筑工业出版社,1986.
[4]李中华,冯树荣,等.海水化学成分对水泥基材料的侵蚀[J].混凝土,2012(5):8-11.
[5]GB/T 17671-1999,水泥胶砂强度检验方法[S].北京:中国标准出版社,1999.
[2]陈国新,杜志芹,等.聚羧酸系减水剂用于水下不分散混凝土的研究[J].混凝土,2012(2):117-123.
[3]黄士元,孙富强,等.混凝土科学-有关近代研究的专论[M].北京:中国建筑工业出版社,1986.
[4]李中华,冯树荣,等.海水化学成分对水泥基材料的侵蚀[J].混凝土,2012(5):8-11.
[5]GB/T 17671-1999,水泥胶砂强度检验方法[S].北京:中国标准出版社,1999.