Journal Published Online: 22 February 2019
Volume 47, Issue 6

Microstructure Synthesis and Characterization of Carbon Nanofibers Reinforced Cement-Based Composites

CODEN: JTEVAB

Abstract

In this work, the properties of carbon nanofiber (CNF)-reinforced cement composites, including the microstructure and high-toughness performance, were investigated. The aqueous dispersing method was used along with a common surfactant and ultrasonic processing in order to obtain homogenous distributed CNF suspensions. The weight fractions of incorporated CNFs in the cement matrix were set to be 0, 0.5, 0.075, 0.1, 0.125, and 0.15 %. A high-toughness performance test, nanoindentation process, and scanning electron microscopy were used to characterize the reinforcement of CNFs in cement composites. Compared with the plain specimen, the addition of CNFs can improve the toughness performance, Young’s modulus, hardness, and microstructure of cement composites. The 0.1 % weight fraction of CNFs obtained the maximum reinforcement among all the tested specimens. The embedded CNFs acted as bridges and networks across the voids and cracks in the matrix, which guaranteed the load transfer in tension. It is noted that the load transfer can be enhanced by embedding CNFs as bridges and networks across the voids and cracks in the composite matrix.

Author Information

Wang, Baomin
Institute of Building Materials, School of Civil Engineering, Dalian University of Technology, Liaoning Province, Dalian, China
Guo, Baolin
Institute of Building Materials, School of Civil Engineering, Dalian University of Technology, Liaoning Province, Dalian, China
Han, Yu
Liaoning Building Science Research Institute, Shenyang, China
Zhang, Yuan
Institute of Building Materials, School of Civil Engineering, Dalian University of Technology, Liaoning Province, Dalian, China
Li, Yang
Institute of Building Materials, School of Civil Engineering, Dalian University of Technology, Liaoning Province, Dalian, China
Pages: 10
Price: $25.00
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Details
Stock #: JTE20180270
ISSN: 0090-3973
DOI: 10.1520/JTE20180270