Modeling of properties of fiber reinforced cement composites

This paper presents the results of authors' laboratory testing of the influence of steel fibers as fiber reinforcement on the change of properties of cement composite mortar and concrete type materials. Mixtures adopted - compositions of mortars had identical amounts of components: cement, sand and silica fume. The second type of mortar contained 60 kg/m3 of fiber reinforcement, as well as the addition of the latest generation of superplasticizer. Physical and mechanical properties of fiber reinforced mortars and etalon mixtures (density, flexural strength, compressive strength) were compared. Tests on concrete type cement composites included: density, mechanical strengths and the deformation properties. The tests showed an improvement in the properties of fiber reinforced composites.

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Micro-fiber reinforced cement composites. II. Flexural response and fracture studies

Canadian Journal of Civil Engineering ◽

10.1139/l95-079 ◽

1995 ◽

Vol 22 (4) ◽

pp. 668-682

Author(s):

N. Banthia ◽

J. Sheng

Keyword(s):

Crack Opening ◽

Fiber Reinforcement ◽

High Volume ◽

Flexural Behavior ◽

Cement Composites ◽

Fiber Reinforced ◽

Host Matrix ◽

Flexural Response ◽

Reinforced Cement ◽

Resistance Curves

In Part I of this paper, stress–strain curves for micro-fiber reinforced cement-based composites containing high volume fractions of carbon, steel, and polypropylene fibers were obtained. Considerable strengthening, toughening, and stiffening of the host matrix due to micro-fiber reinforcement under both static and impact conditions were reported. In this paper, composites are characterized under an applied flexural load. Both notched and unnotched specimens were tested in four-point flexure; significant improvements in the flexural behavior due to fiber reinforcement were noted. Notched specimens were tested to study the growth of cracks in these composites and to develop a valid fracture criterion. With this objective, crack growth resistance curves and crack opening resistance curves in terms of the stress intensity factor were constructed. The paper recognizes the potential of these composites in various applications and stresses the need for further research. Key words: Portland cement-based materials, fiber reinforcement, fracture toughness, R-curves.

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EFFECT OF RECYCLED MATERIALS ON THE TENSILE BEHAVIOR OF STEEL FIBER-REINFORCED CEMENT COMPOSITE

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2017.90 ◽

2017 ◽

Vol 4 (1) ◽

Author(s):

Sun-Woo Kim ◽

Wan-Shin Park ◽

Young-Il Jang ◽

Yi-Hyun Nam ◽

Sun-Woong Kim ◽

...

Keyword(s):

Tensile Strength ◽

Fly Ash ◽

Steel Fiber ◽

Cement Composite ◽

Fine Aggregate ◽

Cement Composites ◽

Fiber Reinforced ◽

Direct Tension ◽

Recycled Materials ◽

Reinforced Cement

Conventional cement composite is generally produced with ordinary Portland cement (OPC) as a binder. However, during manufacturing the cement composite, large amount of carbon dioxide (CO2) are emitted. Therefore, fly ash is proposed to be replaced to OPC in order to reduce CO2 emission of cement composites. For reinforcing fibers, micro steel fibers were used. For investigating mechanical properties of steel fiber-reinforced cement composites (SFRCCs), direct tension tests were conducted. The test results showed that fly ash improves tensile strength and ductility of SFRCCs. However, tensile strength of the SFRCC decreased as replacement ratio of recycled fine aggregate increased. The use of recycled materials in FRCC helps to save natural resources and promote sustainability in civil engineering materials.

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Inhibition of Cracks on the Surface of Cement Mortar Using Estabragh Fibers

Advances in Materials Science and Engineering ◽

10.1155/2013/656109 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 5

Author(s):

Tahereh Soleimani ◽

Ali Akbar Merati ◽

Masoud Latifi ◽

Ali Akbar Ramezanianpor

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Bending Strength ◽

Cement Mortar ◽

Physical And Mechanical Properties ◽

Cement Composite ◽

Cement Composites ◽

Surface Cracks ◽

Reinforced Cement ◽

Mortar Matrix

The influence of adding Estabragh fibers into the cement composites of mortar on surface cracks and mechanical properties of mortar has been studied at various fiber proportions of 0.25%, 0.5%, and 0.75%. The mortar shrinkage was evaluated by counting the number of cracks and measuring the width of cracks on the surface of mortar specimens. Although the Estabragh fibers loss their strength in an alkali environment of cement composites, the ability of Estabragh fibers to bridge on the microcracks in the mortar matrix causes a decrease in the number of cracks and in their width on the surface of the mortar samples in comparison with the plain mortar. However, considering the mechanical properties of specimens such as bending strength and compressive strength, among all fiber proportions, only the specimens with 0.25% of Estabragh fiber performed better in all respects compared to the physical and mechanical properties of reinforced cement composite of mortar. Consequently, by adding 0.25% of Estabragh fibers to the cement mortar, a remarkable inhibition in crack generation on fiber-containing cement composite of mortar is achieved.

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Effect of plasma surface modification on pullout characteristics of carbon fiber-reinforced cement composites

Carbon Trends ◽

10.1016/j.cartre.2021.100030 ◽

2021 ◽

Vol 3 ◽

pp. 100030

Author(s):

Jin Hee Kim ◽

Jong Hun Han ◽

Seungki Hong ◽

Doo-Won Kim ◽

Sang Hee Park ◽

...

Keyword(s):

Surface Modification ◽

Carbon Fiber ◽

Cement Composites ◽

Fiber Reinforced ◽

Plasma Surface Modification ◽

Plasma Surface ◽

Reinforced Cement ◽

Carbon Fiber Reinforced

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Numerical Simulation of the Mechanical Behavior of Fiber-Reinforced Cement Composites Subjected Dynamic Loading

Applied Sciences ◽

10.3390/app11031112 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1112

Author(s):

Nikita Belyakov ◽

Olga Smirnova ◽

Aleksandr Alekseev ◽

Hongbo Tan

Keyword(s):

Numerical Simulation ◽

Reinforced Concrete ◽

Dynamic Loading ◽

Fiber Reinforced Concrete ◽

Cement Composites ◽

Fiber Reinforced ◽

Lab Experiments ◽

Reinforced Cement ◽

Underground Workings ◽

Concrete Damaged Plasticity

The problem of damage accumulation in fiber-reinforced concrete to structures supporting underground workings and tunnel linings against dynamic loading is insufficiently studied. The mechanical properties were determined and the mechanism of destruction of fiber-reinforced concrete with different reinforcement parameters is described. The parameters of the Concrete Damaged Plasticity model for fiber-reinforced concrete at different reinforcement properties are based on the results of lab experiments. Numerical simulation of the composite concrete was performed in the Simulia Abaqus software package (Dassault Systemes, Vélizy-Villacoublay, France). Modeling of tunnel lining based on fiber-reinforced concrete was performed under seismic loading.

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