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Mechano-Physical Properties and Microstructure of Carbon Nanotube Reinforced Cement Paste after Thermal Load

机译：碳纳米管增强水泥浆热载荷后的力学物理性能和微观结构

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摘要

The article presents the results obtained in the course of a study on the use of carbon nanotubes (CNTs) for the modification of a cement matrix. Carbon nanotubes were introduced into a cement paste in the form of an aqueous dispersion in the presence of a surfactant (SDS—sodium dodecyl sulfate), which was sonicated. The selected physical and mechanical parameters were examined, and the correlations between these parameters were determined. An analysis of the local microstructure of the modified cement pastes has been carried out using scanning electron microscope (SEM) and X-ray microanalysis (EDS). In addition, the effect of carbon nanotubes on the change in characteristics of the cementitious material exposed to the sudden, short-term thermal load, was determined. The obtained material was characterized by a much lower density than a traditional cement matrix because the phenomenon of foaming occurred. The material was also characterized by reduced durability, higher shrinkage, and higher resistance to the effect of elevated temperature. Further research on the carbon nanotube reinforced cement paste, with SDS, may contribute to the development of a modified cement binder for the production of a lightweight or an aerated concrete.
机译：本文介绍了在研究中使用碳纳米管（CNTs）改性水泥基体获得的结果。在超声处理的表面活性剂（SDS-十二烷基硫酸钠）存在下，将碳纳米管以水分散体的形式引入水泥浆中。检查所选的物理和机械参数，并确定这些参数之间的相关性。使用扫描电子显微镜（SEM）和X射线微分析（EDS）对改性水泥浆的局部微观结构进行了分析。另外，确定了碳纳米管对暴露于突然的短期热负荷的胶凝材料的特性变化的影响。所获得的材料的特征在于其密度比传统的水泥基体低得多，因为发生了发泡现象。该材料的特征还在于降低的耐久性，更高的收缩率以及对高温影响的更高抵抗力。含SDS的碳纳米管增强水泥浆的进一步研究可能有助于开发用于生产轻质混凝土或加气混凝土的改性水泥粘合剂。

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