Characteristic influence of carbon fibers on fresh state, mechanical properties and microstructure of carbon fiber based self compacting concrete

Abstract Ethylene-butene copolymer (EBC)/carbon-fiber (CF) composites can be utilized as an electromechanical material due to their ability to change electric resistance with mechanical strain. The electro-mechanical properties and thermal conductivity of ethylene butene copolymer (EBC) composites with carbon fibers were studied. Carbon fibers were introduced to EBC with various concentrations (5 to 25 wt%). The results showed that carbon fibers’ addition to EBC improves the electric conductivity up to 10 times. Increasing the load up to 2.9 MPa will raise the electric resistance change by 4 500% for a 25% fiber sample. It is also noted that the EBC/CF composites’ electric resistance underwent a dramatic increase in raising the strain. For example, the resistance change was around 13 times higher at 15% strain compared to 5% strain. The thermal conductivity tests showed that the addition of carbon fibers increases the thermal conductivity by 40%, from 0.19 to 0.27 Wm–1K–1.

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Thermo-mechanical behavior of epoxy composite reinforced by carbon and Kevlar fiber

MATEC Web of Conferences ◽

10.1051/matecconf/201822501022 ◽

2018 ◽

Vol 225 ◽

pp. 01022

Author(s):

Falak O. Abasi ◽

Raghad U. Aabass

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Flexural Strength ◽

Carbon Fibers ◽

Epoxy Composites ◽

Fiber Reinforced ◽

Fiber Loading ◽

Kevlar Fiber ◽

Carbon Fiber Reinforced ◽

Short Carbon

Newer manufacturing techniques were invented and introduced during the last few decades; some of them were increasingly popular due to their enhanced advantages and ease of manufacturing over the conventional processes. Polymer composite material such as glass, carbon and Kevlar fiber reinforced composite are popular in high performance and light weight applications such as aerospace and automobile fields. This research has been done by reinforcing the matrix (epoxy) resin with two kinds of the reinforcement fibers. One weight fractions were used (20%) wt., Epoxy reinforced with chopped carbon fiber and second reinforcement was epoxy reinforced with hybrid reinforcements Kevlar fiber and improved one was the three laminates Kevlar fiber and chopped carbon fibers reinforced epoxy resin. After preparation of composite materials some of the mechanical properties have been studied. Four different fiber loading, i.e., 0 wt. %, 20wt. % CCF, 20wt. % SKF, AND 20wt. %CCF + 20wt. % SKF were taken for evaluating the above said properties. The thermal and mechanical properties, i.e., hardness load, impact strength, flexural strength (bending load), and thermal conductivity are determined to represent the behaviour of composite structures with that of fibers loading. The results show that with the increase in fiber loading the mechanical properties of carbon fiber reinforced epoxy composites increases as compared to short carbon fiber reinforced epoxy composites except in case of hardness, short carbon fiber reinforced composites shows better results. Similarly, flexural strength test, Impact test, and Brinell hardness test the results show the flexural strength, impact strength of the hybrid composites values were increased with existence of Kevlar fibers, while the hardness was decrease. But the reinforcement with carbon fibers increases the hardness and decreases other tests.

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The Influence of Sample Preparation on the Strength Results ofa Pan-based Carbon Fiber

Chemistry & Chemical Technology ◽

10.23939/chcht04.04.329 ◽

2010 ◽

Vol 4 (4) ◽

pp. 329-337

Author(s):

Fabio Pereira ◽

◽

Fabiana Vieira ◽

Luiz de Castro ◽

Ricardo Michel ◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Carbon Fiber ◽

Sample Preparation ◽

Young’S Modulus ◽

Carbon Fibers ◽

Weibull Modulus ◽

Strong Influence ◽

Mechanical Tests ◽

Preparation Process

In this work the influence of different configurations in the sample preparation process on commercial polyacrylonitrile-based carbon fibers mechanical tests were studied. Mechanical properties, such as tensile strength, Young’s modulus, elongation and Weibull modulus, were evaluated. The results showed that all sample preparation steps may have strong influence on the results.

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Influence of calcined mud on the mechanical properties and shrinkage of self-compacting concrete

MATEC Web of Conferences ◽

10.1051/matecconf/201814901026 ◽

2018 ◽

Vol 149 ◽

pp. 01026

Author(s):

Taieb Fatima ◽

Belas Nadia ◽

Belaribi Omar ◽

Belguesmia Khalil ◽

Hadj Sadok Rachid

Keyword(s):

Mechanical Properties ◽

Cement Content ◽

Partial Replacement ◽

Self Compacting Concrete ◽

Fresh State ◽

Beneficial Impact ◽

Mineral Additions ◽

Mechanical Strengths ◽

Specific Formulation ◽

Dredging Sediments

The use of SCC has a particular interest in terms of sustainable development. Indeed, their specific formulation leads to a greater volume of dough than for common concretes, thus, a larger quantity of cement. However, for economical, ecological and technical reasons, it is sought to limit their cement content [1]. It is therefore necessary to almost always use mineral additions as a partial replacement for cement because the technology of self-compacting concretes can consume large quantities of fines, in this case calcinated mud issued from dams dredging sediments that can give and/or ameliorate characteristics and performances of this type of concretes. Four SCCs had been formulated from the same composition where the only percentage of calcinated mud of Chorfa (west of Algeria) dam changed (0%, 10%, 20% and 30%). The effect of calcinated mud on characteristics at fresh state of SCC according to AFGC was quantified. Mechanical strengths and shrinkage deformation (total, autogenous, drying) were evaluated. The results show the possibility to make SCCs with different dosages of calcinated mud having strengths that can defy those of the control SCC. The analysis of free deformations indicates the beneficial impact of the mud by contributing to decrease the amplitudes of the shrinkage compared to those of the control SCC.

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The Effect of Sizing Additives for Carbon Fiber on the Mechanical Properties of Polyetherimide Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.869.488 ◽

2020 ◽

Vol 869 ◽

pp. 488-493

Author(s):

Aues A. Beev ◽

Svetlana Yu. Khashirova ◽

Azamat L. Slonov ◽

Ismel V. Musov ◽

Azamat Zhansitov ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Intermolecular Interactions ◽

Carbon Fibers ◽

Polymer Matrix ◽

Physical And Mechanical Properties ◽

Sizing Agents ◽

Filled Composite

The article presents the results of sizing of discrete carbon fibers with various substances and their effect on the properties of polyetherimide composites. As sizing agents, 1,3-diaminobenzene, 4,4'-dihydroxy-2,2-diphenylpropane, polyetherimide and oligoetherether sulfone were used. The study of physical and mechanical properties showed that all the substances used increase the properties of the carbon-filled composite based on polyetherimide. The highest mechanical properties are demonstrated by a composite containing carbon fibers treated with 1,3-diaminobenzene, which indicates improved compatibility of the filler and the polymer matrix and enhanced intermolecular interactions.

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Effect of CNT Grafting on Carbon Fibers on Impact Properties of CFRTP Laminate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.774.410 ◽

2018 ◽

Vol 774 ◽

pp. 410-415 ◽

Cited By ~ 1

Author(s):

Kazuto Tanaka ◽

Ken Uzumasa ◽

Tsutao Katayama

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Carbon Fibers ◽

Interfacial Strength ◽

Fiber Surface ◽

Impact Properties ◽

Specific Strength ◽

Out Of Plane ◽

Reinforced Thermoplastics ◽

The Impact

Carbon fiber reinforced thermoplastics (CFRTP) are expected to be used as a structural material for aircraft and automobiles not only for their mechanical properties such as high specific strength and high specific rigidity but also for their high recyclability and short molding time. Generally, in a composite material having a laminated structure, interlaminar delamination is often caused by an out-of-plane impact, so the interlayer property plays an important role in the mechanical properties. It has been reported that the fiber/matrix interfacial strength increases by grafting carbon nanotubes (CNT) on the carbon fiber surface. In this study, CNT grafted carbon fibers were used for reinforcement of CFRTP laminate for the improvement of impact properties of CFRTP laminates. The impact absorbed energy of the CFRTP laminate using CNT grafted carbon fibers as reinforcing fiber was higher than that using untreated CF.

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Reinforced interface and mechanical properties of high strength carbon fiber composites

High Performance Polymers ◽

10.1177/0954008320957398 ◽

2020 ◽

pp. 095400832095739

Author(s):

Zibao Jiao ◽

Zhengjun Yao ◽

Jintang Zhou ◽

Pengshu Yi ◽

Chuanjun Lu

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Epoxy Resin ◽

Carbon Fibers ◽

Dynamic Contact Angle ◽

Dynamic Contact ◽

Resin Matrix ◽

Carbon Fiber Composites ◽

Epoxy Resin Matrix ◽

Winding Tension

Based on the surface analysis of carbon fiber, an epoxy resin matrix with good wettability to carbon fibers had been developed and studied, and the influence of winding tension on the interface and mechanical properties of the composite were studied. The surface morphology of carbon fiber and the active functional groups of sizing agent were analyzed. In order to form a good interface combination, the wettability between carbon fibers and epoxy resin matrix was characterized by dynamic contact angle. The winding tension played an important role in the mechanical properties of composites. Therefore, a kind of carbon fiber reinforced composites, Naval Ordnance Laboratory (NOL) rings were fabricated using different winding tensions. Particularly, when the winding tension was 30 N, the interfacial bonding between carbon fibers and resin matrix was the most compact and firm. The tensile strength and interlaminar shear strength (ILSS) of NOL rings reached high values, 2712 MPa and 75 MPa, respectively.

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Structure, Mechanical and Thermal Properties of Polyphenylene Sulfide and Polysulfone Impregnated Carbon Fiber Composites

Polymers ◽

10.3390/polym11040684 ◽

2019 ◽

Vol 11 (4) ◽

pp. 684 ◽

Cited By ~ 13

Author(s):

Chukov ◽

Nematulloev ◽

Zadorozhnyy ◽

Tcherdyntsev ◽

Stepashkin ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Carbon Fibers ◽

Fiber Composites ◽

Chemical Oxidation ◽

Interfacial Interaction ◽

Polyphenylene Sulfide ◽

Carbon Fiber Composites ◽

Mechanical And Thermal Properties ◽

Thermal And Mechanical Properties

The paper studies new high-temperature thermoplastic impregnated unidirectional carbon fiber composites. The research focuses on the effect of thermal and chemical oxidation of the carbon fibers surface on the interfacial interaction between fibers and polysulfone and polyphenylene sulfide as well as thermal and mechanical properties of the composites. The research reveals the interaction between carbon fibers and the polymer matrix depend both on the type of surface treatment and nature of the polymer. The chemical oxidation of carbon fibers results in good interfacial interaction, and the best mechanical properties were observed for tows impregnated with polyphenylene sulfide.

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Microstructure and mechanical properties of short-carbon-fiber/Ti3SiC2 composites

Journal of Advanced Ceramics ◽

10.1007/s40145-020-0408-3 ◽

2020 ◽

Vol 9 (6) ◽

pp. 716-725

Author(s):

Guangqi He ◽

Rongxiu Guo ◽

Meishuan Li ◽

Yang Yang ◽

Linshan Wang ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Flexural Strength ◽

Carbon Fibers ◽

Vickers Hardness ◽

Matrix Composites ◽

Transition Layers ◽

Plasma Sintering ◽

Spark Plasma ◽

Short Carbon

AbstractShort-carbon-fibers (Csf) reinforced Ti3SiC2 matrix composites (Csf/Ti3SiC2, the Csf content was 0 vol%, 2 vol%, 5 vol%, and 10 vol%) were fabricated by spark plasma sintering (SPS) using Ti3SiC2 powders and Csf as starting materials at 1300 °C. The effects of Csf addition on the phase compositions, microstructures, and mechanical properties (including hardness, flexural strength (σf), and KIC) of Csf/Ti3SiC2 composites were investigated. The Csf, with bi-layered transition layers, i.e., TiC and SiC layers, were homogeneously distributed in the as-prepared Csf/Ti3SiC2 composites. With the increase of Csf content, the KIC of Csf/Ti3SiC2 composites increased, but the σf decreased, and the Vickers hardness decreased initially and then increased steadily when the Csf content was higher than 2 vol%. These changed performances (hardness, σf, and KIC) could be attributed to the introduction of Csf and the formation of stronger interfacial phases.

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