聚乙烯醇/碳纳米管复合强化水泥砂浆的力学性能及压敏性

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聚乙烯醇/碳纳米管复合强化水泥砂浆的力学性能及压敏性

Mechanical Properties and Pressure-sensitivity of Polyvinyl Alcohol (PVA) and Carbon Nanotubes (CNTs) Hybrid Modified Cement Mor

２０19年第3期

聚乙烯醇；碳纳米管；水泥砂浆；力学性能；压敏性

Polyvinyl alcohol; Carbon nanotube; Cement mortar; Mechanical property; Pressure-sensitivity

２０19年第3期

10.19761/j.1000-4637.2019.03.001.05

国家自然科学基金项目（51708145、51878299）；贵州省科学技术基金资助项目（黔科合基础[2018]1064）；广东省科技计划资助项目（2015A010105029）；广东省教育厅科技创新项目（2015KTSCX037）。

范杰1，李庚英2，王中坤2

1.贵州理工学院土木工程学院，贵阳550003；2.华南农业大学水利与土木工程学院，广州510642

范杰1，李庚英2，王中坤2

范杰,李庚英,王中坤.聚乙烯醇/碳纳米管复合强化水泥砂浆的力学性能及压敏性研究[J].混凝土与水泥制品,2019(3):1-5.

FAN J,LI G Y,WANG Z K.Mechanical Properties and Pressure-sensitivity of Polyvinyl Alcohol (PVA) and Carbon Nanotubes (CNTs) Hybrid Modified Cement Mortar[J].China Concrete and Cement Products,2019(3):1-5.

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摘要：采用聚乙烯醇和碳纳米管作为复合改性剂增强水泥砂浆，测试了掺量对砂浆力学性能和压敏特性的影响，并结合扫描电镜微观分析方法探究了相互作用机理。结果表明，将聚乙烯醇和碳纳米管通过超声分散形成预聚液掺入水泥砂浆中，能随着水化进程的推演脱水析出形成均匀分布的三维网络结构，优化基体内部孔结构，并有效提升其宏观性能。聚乙烯醇掺量1.0%、碳纳米管掺量0.5%时，砂浆具有较好的力学性能，抗压、抗折强度较之空白砂浆分别提升53.48%和100.69%。此外，聚乙烯醇和碳纳米管的相互作用使得导电填料在水泥基体中的分散更为均匀，并有利于导电通路的形成，从而提高水泥砂浆的压敏性。 Abstract: Polyvinyl alcohol (PVA) and carbon nanotubes (CNTs) were used as composite modifiers to reinforce cement mortar. The effects of the content of PVA and CNTs on the mechanical properties and pressure-sensitivity of mortar were tested, and the microstructure was explored by scanning electron microscopy (SEM). The results show that PVA/CNTs composite modifiers can form a three-dimensional network with uniform distribution after dehydration and precipitation, optimize the pore structure of matrix and improve the macroscopic properties. The compressive strength and flexural strength of cement mortar increase by 53.48% and 100.69% with the content of 0.6% PVA and 0.5% CNTs. In addition, the good distribution of CNTs also improves the pressure-sensitivity of cement mortar.

英文名 : Mechanical Properties and Pressure-sensitivity of Polyvinyl Alcohol (PVA) and Carbon Nanotubes (CNTs) Hybrid Modified Cement Mor

刊期 : ２０19年第3期

关键词 : 聚乙烯醇；碳纳米管；水泥砂浆；力学性能；压敏性

Key words : Polyvinyl alcohol; Carbon nanotube; Cement mortar; Mechanical property; Pressure-sensitivity

刊期 : ２０19年第3期

DOI : 10.19761/j.1000-4637.2019.03.001.05

文章编号 :

基金项目 : 国家自然科学基金项目（51708145、51878299）；贵州省科学技术基金资助项目（黔科合基础[2018]1064）；广东省科技计划资助项目（2015A010105029）；广东省教育厅科技创新项目（2015KTSCX037）。

作者 : 范杰1，李庚英2，王中坤2

单位 : 1.贵州理工学院土木工程学院，贵阳550003；2.华南农业大学水利与土木工程学院，广州510642

范杰1，李庚英2，王中坤2

范杰,李庚英,王中坤.聚乙烯醇/碳纳米管复合强化水泥砂浆的力学性能及压敏性研究[J].混凝土与水泥制品,2019(3):1-5.

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摘要

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结论

参考文献

引用本文

Abstract: Polyvinyl alcohol (PVA) and carbon nanotubes (CNTs) were used as composite modifiers to reinforce cement mortar. The effects of the content of PVA and CNTs on the mechanical properties and pressure-sensitivity of mortar were tested, and the microstructure was explored by scanning electron microscopy (SEM). The results show that PVA/CNTs composite modifiers can form a three-dimensional network with uniform distribution after dehydration and precipitation, optimize the pore structure of matrix and improve the macroscopic properties. The compressive strength and flexural strength of cement mortar increase by 53.48% and 100.69% with the content of 0.6% PVA and 0.5% CNTs. In addition, the good distribution of CNTs also improves the pressure-sensitivity of cement mortar.

关键词:

聚乙烯醇；碳纳米管；水泥砂浆；力学性能；压敏性

扫二维码用手机看

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[11] 范杰,李庚英.聚乙烯醇改性水泥砂浆的力学性能及微观结构[J].混凝土与水泥制品,2018(11):18-22.

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