| 摘要: |
| 为了改善镀铜钢纤维与水泥基体的黏结强度,用γ 甲基丙烯酰氧基丙基三甲氧基硅烷（MPS）和γ 巯基丙基三甲氧基硅烷（MPTS）对镀铜钢纤维进行表面处理.采用红外光谱、扫描电子显微镜(SEM)、氯化钠溶液浸泡腐蚀试验和黏结强度测试来评价处理后镀铜钢纤维的性能.结果表明：MPTS与镀铜钢纤维表面发生了化学键合,提升了钢纤维表面粗糙度;经过MPS处理和MPTS/MPS组合处理的钢纤维腐蚀溶液的吸光度积分只有未处理组的91%和45%;经过MPS处理和MPTS/MPS组合处理的钢纤维从水泥基体中拔出时所做的功相对于未改性组分别提升了43%和224%,与水泥基体的黏结强度得到了相应提高. |
| 关键词: 镀铜钢纤维 硅烷偶联剂 化学键合 水泥砂浆 表面处理 耐腐蚀 黏结强度 |
| DOI：103969/j.issn.1007 9629201904015 |
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| 基金项目: |
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| Surface Modifying of Copper Plated Steel Fibers and Its Corrosion Resistance and Bond Behavior with Cement Mortar |
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ZHONG Shiyun, FU Jingming
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Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China
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| Abstract: |
| In order to improve the bond strength between copper plated steel fibers and cement motar and enhance the corrosion resistance of fibers, the fibers were treated with silane coupling agents 3 methacryloxy propyl trimethoxy silane(MPS) and 3 mercapto propyl trimethoxy silane(MPTS),and the fibers were tested with infrared spectrum, scanning electron microscope（SEM）, corrosion in NaCl solution and single fiber pull out experiments. The results indicate that the MPTS is chemically bonded to the fibers; the surface roughness of the fibers treated with coupling agents is greatly improved; the integration of absorbance of the NaCl solutions in which MPS fibers and MPTS/MPS fibers are soaked is only 91% and 45% of that of the untreated fibers; the treatment of the agents greatly enhances the energy demanded for MPS fibers and MPTS/MPS fibers to be pulled out of the cement mortar with an increase of 43% and 224% respectively in comparison with the untreated fibers, as well as enhances the bond strength between fibers and cement mortar. |
| Key words: copper plated steel fiber silane coupling agent chemical bonding cement mortar surface treatment corrosion resistance bond strength |
