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

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.

scholarly journals Effects of Moisture on Mechanical and Piezoresistive Properties of Cement Composites containing Carbon Fiber during long age

2021 ◽  
Vol 245 ◽  
pp. 03061
Author(s):  
Wangyanfeng ◽  
Zhaoxiaohua ◽  
Zhaoyi ◽  
Bianyadong
Keyword(s):  
Compressive Strength ◽  
Carbon Fiber ◽  
Stress Amplitude ◽  
Cement Matrix ◽  
Gauge Factor ◽  
Cement Composites ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Reinforced Cement ◽  
Carbon Fiber Reinforced

This paper presents a compressive test program designed to determine the mechanical and self-sensing properties of cement-matrix composites containing carbon fiber. Two kinds of mixes with 0.5% and 0.75% carbon fiber （CF） were prepared. The mechanical and piezoresistive properties of the cement-matrix composites were evaluated at 28, 90, 180, 270, and 360 d. The results show that the mechanical properties were enhanced in most cases. However, the compressive strength of carbon fiber reinforced cement-matrix composites decreased compared with the reference mix at the early curing ages, which agrees with the results mentioned in the literature. What is worth to mention, the 360 d compressive strength of carbon fiber reinforced cement-matrix composites reached the same level as that of the reference. Moreover, both negative and positive piezoresistivity were observed during the experiments. The amplitude of piezoresistivity was found to change with the variation of moisture content, and was not directly proportional to the magnitude of the stress. In the elastic stage with smaller stress amplitude, the piezoresistivity amplitude was larger. When the stress amplitude was multiplied, the piezoresistivity change was not synchronous. The gauge factor for the composite with 0.75% CF was higher than that of the composite with 0.5% CF and commercially available strain gauges.

Graphene oxide modified carbon fiber reinforced epoxy composites

2020 ◽  
Vol 40 (5) ◽  
pp. 415-420 ◽  
Author(s):  
Yasin Altin ◽  
Hazal Yilmaz ◽  
Omer Faruk Unsal ◽  
Ayse Celik Bedeloglu
Keyword(s):  
Graphene Oxide ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Spray Coating ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Quick Method ◽  
Carbon Fiber Reinforced

AbstractThe interfacial interaction between the fiber and matrix is the most important factor which influences the performance of the carbon fiber-epoxy composites. In this study, the graphitic surface of the carbon fibers was modified with graphene oxide nanomaterials by using a spray coating technique which is an easy, cheap, and quick method. The carbon fiber-reinforced epoxy matrix composites were prepared by hand layup technique using neat carbon fibers and 0.5, 1 and 2% by weight graphene oxide (GO) modified carbon fibers. As a result of SEM analysis, it was observed that GO particles were homogeneously coated on the surface of the carbon fibers. Furthermore, Young's modulus increased from 35.14 to 43.40 GPa, tensile strength increased from 436 to 672 MPa, and the elongation at break was maintained around 2% even in only 2% GO addition.

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