Buasiri Thanyarat, Habermehl-Cwirzen Karin, Krzeminski Lukasz, Cwirzen Andrzej
Building Materials, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden.
The Institute of Engineering Materials and Biomaterials, Silesian University of Technology, 44-100 Gliwice, Poland.
Nanomaterials (Basel). 2019 Apr 10;9(4):594. doi: 10.3390/nano9040594.
Carbon nanofibers (CNFs) were directly synthesized on Portland cement particles by chemical vapor deposition. The so-produced cements contained between 2.51-2.71 wt% of CNFs; depending on the production batch. Several mortar mixes containing between 0 and 10 wt% of the modified cement were produced and the electrical properties at various ages and the load sensing capabilities determined. The percolation threshold related to the electrical conductivity was detected and corresponded to the amount of the present CNFs, 0.271, 0.189, 0.135 and 0.108 wt%. The observed threshold depended on the degree of hydration of the Portland cement. The studied mortars showed a strong piezoresistive response to the applied compressive load reaching a 17% change of the electrical resistivity at an applied load of 3.5 MPa and 90% at 26 MPa. This initial study showed that the studied material is potentially suitable for future development of novel fully integrated monitoring systems for concrete structures.
通过化学气相沉积法在波特兰水泥颗粒上直接合成了碳纳米纤维（CNF）。如此生产出的水泥含有2.51 - 2.71重量%的碳纳米纤维，具体含量取决于生产批次。制备了几种含有0至10重量%改性水泥的砂浆混合物，并测定了不同龄期的电学性能和负载传感能力。检测到与电导率相关的渗流阈值，其对应于碳纳米纤维的含量，分别为0.271、0.189、0.135和0.108重量%。观察到的阈值取决于波特兰水泥的水化程度。所研究的砂浆对施加的压缩载荷表现出强烈的压阻响应，在3.5 MPa的施加载荷下电阻率变化达17%，在26 MPa时达90%。这项初步研究表明，所研究的材料有可能适用于未来混凝土结构新型全集成监测系统的开发。
Zotero 插件
