SiO2溶胶和CNTs杂化增强水泥基复合材料性能研究

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发布时间：2020-01-06 00:00:00

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SiO2溶胶和CNTs杂化增强水泥基复合材料性能研究

Study on Properties of Cement-based Composite Materials Reinforced by SiO2 Sol and Carbon Nanotubes Hybrid

2023年第3期

碳纳米管； SiO2溶胶；流动性；力学性能；微观结构

Carbon nanotubes(CNTs); SiO2 sol; Flowability; Mechanical property; Microstructure

2023年第3期

10.19761/j.1000-4637.2023.03.010.05

卢欢欢1，王文广2，李佩枫1

1.辽宁石油化工大学，辽宁抚顺 113001；2.中国科学院金属研究所，辽宁沈阳110016

卢欢欢1，王文广2，李佩枫1

卢欢欢,王文广,李佩枫.SiO2溶胶和CNTs杂化增强水泥基复合材料性能研究[J].混凝土与水泥制品,2023(3):10-14.

LU H H,WANG W G,LI P F.Study on Properties of Cement-based Composite Materials Reinforced by SiO2 Sol and Carbon Nanotubes Hybrid[J].China Concrete and Cement Products,2023(3):10-14.

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摘要：采用超声波法制备了SiO2溶胶-碳纳米管（CNTs）分散液，研究了SiO2溶胶-CNTs分散液对水泥基复合材料性能的影响，并用SEM、EDS、XRD微观测试方法对其进行了表征。结果表明：以SiO2溶胶为分散介质，通过超声波法能够实现CNTs在水泥基复合材料中的均匀分散；掺1.5%的SiO2溶胶和0.15%的CNTs能进一步提高砂浆的力学性能；SiO2溶胶的火山灰活性消耗了砂浆中多余的水化产物Ca(OH)2，形成C-S-H凝胶密实了砂浆结构，CNTs在水泥浆体和细骨料界面之间起到纤维增强的作用，细化了孔隙，填补了微裂缝，降低了孔隙率。 Abstract: Carbon nanotubes(CNTs) were dispersed in aqueous solution by ultrasonic dispersion, and SiO2 sol was added to CNTs dispersion by gel method. The effects of CNTs and SiO2 sol on the properties of cement-based composite materials were studied, and it was characterized by SEM, EDS and XRD. The results show that CNTs can be uniformly dispersed in cement-based composite materials by ultrasonic method with SiO2 sol as dispersion medium. Adding 1.5% SiO2 sol and 0.15% CNTs can further improve the mechanical properties of mortar. The pozzolanic activity of SiO2 sol consumes the excess hydration product Ca(OH)2 in the mortar to form C-S-H gel and compact the mortar structure. CNTs plays a role of fiber reinforcement between the cement paste and the fine aggregate interface, refines the pores, fills the micro cracks, reduces the porosity.

英文名 : Study on Properties of Cement-based Composite Materials Reinforced by SiO2 Sol and Carbon Nanotubes Hybrid

刊期 : 2023年第3期

关键词 : 碳纳米管； SiO2溶胶；流动性；力学性能；微观结构

Key words : Carbon nanotubes(CNTs); SiO2 sol; Flowability; Mechanical property; Microstructure

刊期 : 2023年第3期

DOI : 10.19761/j.1000-4637.2023.03.010.05

文章编号 :

基金项目 :

作者 : 卢欢欢1，王文广2，李佩枫1

单位 : 1.辽宁石油化工大学，辽宁抚顺 113001；2.中国科学院金属研究所，辽宁沈阳110016

卢欢欢1，王文广2，李佩枫1

卢欢欢,王文广,李佩枫.SiO2溶胶和CNTs杂化增强水泥基复合材料性能研究[J].混凝土与水泥制品,2023(3):10-14.

LU H H,WANG W G,LI P F.Study on Properties of Cement-based Composite Materials Reinforced by SiO2 Sol and Carbon Nanotubes Hybrid[J].China Concrete and Cement Products,2023(3):10-14.

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摘要

参数

结论

参考文献

引用本文

摘要：采用超声波法制备了SiO2溶胶-碳纳米管（CNTs）分散液，研究了SiO₂溶胶-CNTs分散液对水泥基复合材料性能的影响，并用SEM、EDS、XRD微观测试方法对其进行了表征。结果表明：以SiO₂溶胶为分散介质，通过超声波法能够实现CNTs在水泥基复合材料中的均匀分散；掺1.5%的SiO₂溶胶和0.15%的CNTs能进一步提高砂浆的力学性能；SiO₂溶胶的火山灰活性消耗了砂浆中多余的水化产物Ca(OH)₂，形成C-S-H凝胶密实了砂浆结构，CNTs在水泥浆体和细骨料界面之间起到纤维增强的作用，细化了孔隙，填补了微裂缝，降低了孔隙率。

Abstract: Carbon nanotubes(CNTs) were dispersed in aqueous solution by ultrasonic dispersion, and SiO₂ sol was added to CNTs dispersion by gel method. The effects of CNTs and SiO₂ sol on the properties of cement-based composite materials were studied, and it was characterized by SEM, EDS and XRD. The results show that CNTs can be uniformly dispersed in cement-based composite materials by ultrasonic method with SiO₂ sol as dispersion medium. Adding 1.5% SiO₂ sol and 0.15% CNTs can further improve the mechanical properties of mortar. The pozzolanic activity of SiO₂ sol consumes the excess hydration product Ca(OH)₂ in the mortar to form C-S-H gel and compact the mortar structure. CNTs plays a role of fiber reinforcement between the cement paste and the fine aggregate interface, refines the pores, fills the micro cracks, reduces the porosity.

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SiO2溶胶和CNTs杂化增强水泥基复合材料性能研究

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