摘要
以羧基化碳纳米管、纳米SiO2粉体及硅烷偶联剂KH550为主要原料,通过KH550化学修饰和纳米SiO2粒子表面负载两步接枝反应制备了SiO2/碳纳米管纳米杂化材料。研究了碳纳米管和纳米SiO2的单掺以及二元共掺对水泥净浆7d龄期的抗折强度、抗压强度和电阻率的影响。结果表明单掺1%纳米SiO2可提高水泥浆体的7d抗压强度,单掺0.1%碳纳米管能提高水泥浆体的7d抗折强度和降低电阻率。1%纳米SiO2与0.1%碳纳米管二元共掺时,与混合掺入方式相比,纳米杂化掺入使水泥净浆性能的改善更为明显,其7d抗折强度和抗压强度较纯水泥净浆分别提高了35%和22%、电阻率降低了19.2%。
Using carboxylation carbon nano-tube,nano-SiO2 powders and silane coupling KH550 as main raw materials,SiO2/nano-tube nanohybrids were prepared by chemical modification of KH550 and supported and surface two-step grafting reactions.The effects of the singular and binary combinations of carbon nano-tube and nano-SiO2 on the flexural strength,compressive strength and resistivity of cement paste at 7-day were investigated.Itrevealed that single doping of 1%nano-SiO2 improved the compressive strength of cement paste at 7-day,while single doping of 0.1%carbon nano-tube increasing the flexural strength and reduced the resistivity of cement paste at 7d.Compared with cement paste,its 7d flexural strength and compressive strength are increased by 35%and 22%,and the resistivity is reduced by 19.2%.
作者
潘晓燕
花蕾
PAN Xiaoyan;HUA Lei(Department of Civil Engineering,Tongji Zhejiang College,Zhejiang Jiaxing 314051,China)
出处
《低温建筑技术》
2020年第11期18-21,共4页
Low Temperature Architecture Technology
