Partial replacement of carbon fiber by carbon black in multifunctional cement–matrix composites

Carbon ◽  
2007 ◽  
Vol 45 (3) ◽  
pp. 505-513 ◽  
Author(s):  
Sihai Wen ◽  
D.D.L. Chung
Keyword(s):  
Carbon Fiber ◽  
Carbon Black ◽  
Partial Replacement ◽  
Cement Matrix ◽  
Matrix Composites

scholarly journals Carbon Fiber Cement-Matrix Composites

TANSO ◽  
1999 ◽  
Vol 1999 (190) ◽  
pp. 300-312 ◽  
Author(s):  
D. D. L. Chung
Keyword(s):  
Carbon Fiber ◽  
Cement Matrix ◽  
Matrix Composites

Mechanical and Strain-Sensing Properties of Cement-Matrix Composite Containing Nano-Sized Carbon Black

2019 ◽  
Vol 815 ◽  
pp. 203-209
Author(s):  
Yan Feng Wang ◽  
Yi Zhao ◽  
Xiao Hua Zhao ◽  
Ran Hai
Keyword(s):  
Carbon Black ◽  
Compressive Loading ◽  
Cement Matrix ◽  
Structural Function ◽  
Matrix Composites ◽  
Strain Sensing ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced Composites ◽  
Reinforced Cement ◽  
Experimental Researches

An experimental researches was performed for carbon black-reinforced cement-matrix composites. The carbon black used was in the form of particles with a nano-size. Results show that when content of the carbon black is between 0.25% and 0.75% by weight of cement, both flexural and compressive strengths of the composite can be enhanced. Flexural strength increases up to 9.69%, and compressive strength increases up to 6.92%, respectively. Moreover, the carbon black-reinforced composite is of high strain-sensing ability. The fractional change in resistance () increases monotonically upon compressive loading, and decreases monotonically upon unloading. These properties indicate that the carbon black-reinforced composite can be used for structural function, while at the same time act as a strain sensor itself. Compared with carbon fiber-reinforced composites, the carbon black-reinforced composite has a low price and is easy for mixing.

Effects of Environmental Temperature and Humidity on the Electrical Properties of Carbon Fiber Graphite Cement Mortar

2010 ◽  
Vol 143-144 ◽  
pp. 1022-1026 ◽  
Author(s):  
Xiao Ming Fan
Keyword(s):  
Electrical Resistivity ◽  
Electrical Properties ◽  
Carbon Fiber ◽  
Environmental Temperature ◽  
Graphite Powder ◽  
Cement Matrix ◽  
Matrix Composites ◽  
Variation Rate ◽  
Increasing Temperature ◽  
The Impact

The paper researched the electrical properties of carbon fiber graphite cement-matrix composites(CFGCC) containing carbon fiber 0.5% (mass fraction of cement, the same below) and graphite powder 0%~30%, and the impact of environmental temperature(10~50°C) and relative humidity (20%~60%) to electrical properties of CFGCC by the four-probe method and KSON high and low temperature environmental chambers. The results have shown: the electrical resistivity of CFGCC decreases with increasing the content of graphite; the relationship curve of electrical resistivity and concentration of graphite exists percolation phenomena, the percolation threshold of CFGCC is about 25%; the electrical resistivity of CFGCC have decreased with increasing temperature; the variation rate of electrical resistivity have decreased with increasing the contents of graphite; the electrical resistivity have changed a little as the humidity changed, and the trend is towards smaller as a whole.

Electromagnetic Interference of Ferrocene-Doped Carbon Fiber-Reinforced Cement Composites

2011 ◽  
Vol 261-263 ◽  
pp. 638-641
Author(s):  
Chuang Wang ◽  
Ke Zhi Li ◽  
Zhen Jun Wang ◽  
Geng Sheng Jiao
Keyword(s):  
Carbon Fiber ◽  
Electromagnetic Interference ◽  
Cement Matrix ◽  
Cement Composites ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Frequency Range ◽  
Maximum Reflectivity ◽  
Reinforced Cement ◽  
Carbon Fiber Reinforced

The reflectivity of ferrocene-doped carbon fiber-reinforced cement-matrix composites against the electromagnetic radiation was measured in the frequency range of 8-18 GHz for different carbon fiber contents of 0.4, 0.6, 0.89, 1.33, and 1.78 wt% by mass of cement. The ferrocene was doped in 0.89, 1.78, 3.56, 4.89, and 6.27 wt% by mass of cement respectively. The maximum reflectivity reached -4.0 dB when the fiber percentage was 0.89 and the ferrocene was 3.56. The microwave was attenuated by 64 % through reflection. The minimum reflectivity -7.5 dB occurred when the fiber percentage was 1.33 and the ferrocene percentage was 4.89. The microwave was attenuated by 67.5 % through absorption. Prior to the fiber percentage of 0.89 and the ferrocene percentage of 3.56, the reflectivity kept rising.

scholarly journals Cement-Matrix Composites Using CFRP Waste: A Circular Economy Perspective Using Industrial Symbiosis

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1484
Author(s):  
Pierluca Vitale ◽  
Rosanna Napolitano ◽  
Francesco Colella ◽  
Costantino Menna ◽  
Domenico Asprone
Keyword(s):  
Carbon Fiber ◽  
Circular Economy ◽  
Mechanical Performance ◽  
Volume Fraction ◽  
Cement Matrix ◽  
Industrial Symbiosis ◽  
Distribution Analysis ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

This study aims to provide a mitigation strategy for reducing the economic and environmental impacts of carbon fiber wastes deriving from automotive industry. Recycling and reuse in the construction industry is proposed, according to an industrial symbiosis within a circular economy perspective. Specifically, the process consists of repurposing carbon fiber reinforced polymer (CFRP) scraps/waste into new cement-matrix composites, for which the resulting benefits, in terms of mechanical and environmental performance, are herein described. An experimental campaign, starting with a specific heat treatment of CFRP sheets and an accurate dimensional distribution analysis of the short carbon fibers, is presented. The influence of the fiber content and length on both the workability and the mechanical performance of cement-based carbon fiber reinforced mortars is also evaluated. A reduced amount of either sand or cement (up to 8% and 12.8% in volume, respectively) is also considered in the mix design of the fiber reinforced mortars and derives from the substitution of the sand or binder with an equivalent volume of CFRP fibers. The results show a satisfactory increase in compressive and flexural strength in the range 10–18% for the samples characterized by a volume fraction of fibers of approximately 4% and having a 2–5 mm length. Finally, a life cycle assessment (LCA, 14040/14044) was carried out to quantify the environmental burden reductions associated with the implementation of the proposed symbiotic scheme.

Thermoelectric structural composites and thermocouples using them

2001 ◽  
Vol 691 ◽  
Author(s):  
Shoukai Wang ◽  
Sihai Wen ◽  
Victor H. Guerrero ◽  
D.D.L. Chung
Keyword(s):  
Carbon Fiber ◽  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Short Fiber ◽  
Cement Matrix ◽  
Matrix Composites ◽  
Structural Composites ◽  
Reinforcing Fibers ◽  
Continuous Carbon Fiber ◽  
Particulate Filler

ABSTRACTThe tailoring of the sign and magnitude of the absolute thermoelectric power was achieved in structural composites by the choice of the reinforcing fibers and of the particulate filler between laminae. The resulting thermoelectric structural composites included continuous carbon fiber polymer-matrix composites and short fiber cement-matrix composites. In addition, it resulted in thermocouples in the form of structural composites. The fibers and interlaminar filler impacted the thermoelectric behavior in the longitudinal and through-thickness directions respectively.

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