Concrete, Reinforced by Carbon Fibre Composite Structure, Load Bearing Capacity During Cracking

Annamaneni, Krishna Kiran; Dobariya, Bhumika Vallabhbhai; Krasņikovs, Andrejs

doi:10.17770/etr2021vol2.6655

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Short fibers can be made from steel, glass, synthetic, natural, and other fibers [1] [4] [5] [6] [3] [7] [8] [9] [10]. These fibers give concrete greater strength, post cracking load bearing capacity, wearability, durability, structural integrity and etc [1] [7] [3] [10] [11]. Important role is playing composite fiber [12] [13] [14] [15] [16].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Composite Basalt Short Fiber for Concrete Structure Reinforcement

Rengasamy Kannathasan,

Krasnikovs,

Macanovskis

et al. 2024

ETR

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Interest to Fiber concrete - concrete reinforced with short randomly distributed in the material volume fibers is growing and obtaining more new fields of application. Initially used fibers were steel. Composite Fibers (CF) have become competitive with steel fibers, fiber concretes with such fibers are now under investigation. In the present research, authors investigated the bond strength between the fiber and concrete, as well as other mechanical characteristics of the fiber concrete with CF. CF were made of short basalt micro-fibers glued together by Epoxy resin. Basalt micro-fiber roving (250 filaments) was taken as a main source of the CF, it was impregnated with epoxy resin. The Epoxy resin to hardener ratio was 3:1. After a few days maturing prepared CF were cut down into short fibers of a size of 24 mm. The authors planned to prepare concrete samples for the single fiber pull-out test and composite fiber-reinforced concrete prisms for the four-point bending test. Another product used in the investigation was Oil Shale Ash (OSA). OSA is a class-C fly ash. OSA was used as a partial cement replacement in a concrete. The concrete mixture was prepared with different compositions in addition to Oil Shale Ash (was used OSA from Auvere, Estonia, thermal power plant) as replacement of cement in ratios of 0%, 10%, 20%, and 30%. Tests were performed to obtain the load-bearing capacity of a concrete with basalt fibers. An important property of every kind of fiber is the single fiber behavior under pull-out conditions. Microscopic analysis has been made to conclude the research.

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Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Composite Basalt Short Fiber for Concrete Structure Reinforcement

Rengasamy Kannathasan,

Krasnikovs,

Macanovskis

et al. 2024

ETR

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“…Short fibers can easily penetrate into concrete while mixing and these are added as a reinforcement so that the fibers will distribute throughout the concrete [25,26] and increases its load bearing capacity. At the same time, called "homogeneous fiber reinforced concrete" doesn't mean homogeneous in reality, because during filling mix moulds FRC process fibers added to concrete mix blend are obtaining non-homogeneous orientations and distribution in to fresh mix concrete volume which inevitably affects the mechanical properties of FRC [27][28][29]. FRC with homogeneously distributed fibers in the volume of the structure is not optimal (because most of the added fibers do not participate in the load-bearing process).…”

Section: Introductionmentioning

confidence: 99%

Compressive and flexural behavior of glass fiber-reinforced concrete

Annamaneni

Pedarla

2023

J. Phys.: Conf. Ser.

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Utilizing fibre-reinforced concrete is still a difficulty for present engineers. Generally, it is acknowledged that the mechanical, cracking and fracture qualities of fibre-reinforced concrete are much better than those of conventional concrete. The addition of fibres to the concrete matrix mitigates its fragility. Typically, short fibres are utilised in concrete to prevent cracks caused by drying and autogenous shrinkage. Currently, there is a substantial increase in the use of short alkali-resistant glass fibres. This experiment was conducted to examine the influence of glass fibre reinforcement on the compressive and flexural behaviour of concrete. This research investigates the characteristics of glass fibres reinforced concrete (GFRC) after 7 and 28 days of curing, such that GFRC may be employed in construction. Concrete containing short alkali-resistant glass fibres of 36 mm in length and 1% volume fraction (VF) was developed for this purpose. The testing findings revealed that the average compressive strength of GFRC after 28 days of curing was 72.06 MPa. The flexural properties of GFRC are determined, and the 7-day and 28-day average bending strengths of GFRC concrete samples are 6.46 MPa and 7.94 MPa, respectively, indicating that GFRC responds well under loading conditions.

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“…Continuous reinforcement added to concrete increases its strength and ductility, but careful reinforcement placement requires full or partial use of manual labour. Nowadays, reinforced concrete is changing; steel in the reinforcing rebars is replaced by various other materials [5][6][7][8][9]. In many situations, rebars are replaced with short fibers added to the concrete mix [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Concrete Reinforced by Hybrid Mix of Short Fibers under Bending

Lūsis

Annamaneni

Krasņikovs

2022

Fibers

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In the present study, the mechanical behavior of Fiber-Reinforced Concrete (FRC) beams was studied under bending until rupture. Each beam was reinforced with a hybrid mix of short fibers randomly distributed in its volume. Concrete beams with three different fiber combinations were investigated, namely, beams reinforced with (1) a homogeneously distributed mix of short polypropylene fibers (PP) and steel fibers, (2) PP fibers and Alkali Resistant Glass (ARG) fibers, and (3) PP and composite fibers (CF). The amount of short PP fibers was the same in all FRCs. The investigation focused on the fracture mechanisms and the load-bearing capacity of FRC beams with the developing macro cracks. In total, 12 FRC composite prismatic specimens were casted and tested in four-point bending experiments (4PBT). The current load value versus the Crack Mouth Opening Displacement (CMOD) for all FRCs was analyzed. The crack opening relationship and the influence of fibers on the fracture energy and flexural tensile strength were determined. Rupture surfaces of all samples were investigated using an optical microscope.

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Concrete, Reinforced by Carbon Fibre Composite Structure, Load Bearing Capacity During Cracking

Cited by 5 publications

References 27 publications

Mechanical Behavior of Composite Basalt Short Fiber for Concrete Structure Reinforcement

Mechanical Behavior of Composite Basalt Short Fiber for Concrete Structure Reinforcement

Compressive and flexural behavior of glass fiber-reinforced concrete

Concrete Reinforced by Hybrid Mix of Short Fibers under Bending

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