基于纳米技术的水泥基复合材料改性研究
关键词 UHPC 纳米SiO2 碳纳米管 纳米Al2O3 强度
毕业设计说明书（毕业论文）外文摘要
Title Modification of Cement-based Composite Materials Based on Nano-technology
Abstract
Due to the increasing interest in nano-materials, the experimental study herein presented was conducted aiming to evaluate the influence of nano-SiO2 (NS), multi-walled carbon nano-tubes (MWCNTs) and nano-Al2O3 (NA) addition on mechanical property of UHPC. Experimental results show that the incorporation amount of certain types of nano-materials can improve the compressive strength of UHPC, but mostly deteriorate the flexural strength. Moreover, the microstructures of the specimens were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). In addition, the paper also researches the role of ultrasonic dispersion for nano-materials, such as carbon nano-tubes, relating to the influence of the degree of dispersion and incorporation of nano-materials in UHPC.
Keywords UHPC nano-SiO2 carbon nano-tube nano-Al2O3 strength
目 次
1 引言（绪论） 1
1.1 超高性能混凝土 1
1.2 纳米材料 1
1.3 纳米材料对水泥基复合材料的影响 1
2 实验 3
2.1 原材料 3
2.2 仪器与设备 3
2.3 砂浆制备 4
2.3.1 空白试样制备 4
2.3.2 掺入纳米SiO2砂浆制备 4
2.3.3 掺入多壁碳纳米管（MWCNTs）砂浆制备 4
2.3.4 掺入纳米Al2O3砂浆制备 4
2.4 养护 5
2.5 强度测试 5
2.5.1 混凝土试件抗弯强度测试方法 5
2.5.2 混凝土试件抗压强度测试方法 6
3 结果与讨论 8
3.1 纳米SiO2掺量对UHPC强度的影响 8
3.2 多壁碳纳米管（MWCNTs）掺量对UHPC强度的影响 10
3.3 纳米Al2O3掺量对UHPC强度的影响 13
3.4 超声波分散处理功率对掺碳纳米管UHPC的影响 17
3.5 样品SEM分析 18
3.5.1 原材料SEM分析 18
3.5.2 UHPC空白试样的SEM分析 18
3.5.3 掺入纳米SiO2的UHPC的SEM分析 21
3.5.4 掺入多壁碳纳米管的UHPC的SEM分析 23
3.5.5 掺入纳米Al2O3的UHPC的SEM分析 25
3.6 样品XRD分析 27