Performance of Carbon Nanofiber-Cement Composites with a High-Range Water Reducer

被引：65

作者：

Gay, Catherine ^{[1
]}

Sanchez, Florence ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA

来源：

TRANSPORTATION RESEARCH RECORD | 2010年 / 2142期

基金：

美国国家科学基金会;

关键词：

MECHANICAL-PROPERTIES; NANOTUBE; MICROSTRUCTURE;

D O I：

10.3141/2142-16

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The effect of a polycarboxylate-based high-range water reducer (HRWR) on incorporation of carbon nanofibers (CNFs) in cement composites was evaluated. Use of the HRWR proved successful in disaggregating the CNFs in solution and improved the dispersion of CNFs in the cement paste at the individual fiber level. However, an inhomogeneous distribution of the fibers within the composites was observed. Addition of 0.2% CNFs per weight of cement resulted in increased splitting tensile strength of 22% in portland cement composites and 26% in composites that also contained silica fume. Migration of the CNFs in the bleed water was observed depending on the water-binder ratio used, creating a porous layer of agglomerated CNFs intermixed with cement paste at the upper surface of the composite.

引用

页码：109 / 113

页数：5

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