Improving the brittle behavior of high strength concrete using banana and palm leaf sheath fibers

Saad, M. A. M.; Agwa, Ibrahim Saad; Abdelsalam, Bassam Abdelsalam; Amin, Mohamed

doi:10.1080/15376494.2020.1780352

Cited by 46 publications

(12 citation statements)

References 39 publications

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“…Unit Weight Graph of Samples It has been observed that the unit weights of the mixtures are in accordance with the ACI213R-03 standard. It is seen that the thesis study is in line with different studies in the literature (Mydin et al 2012;Amin et al 2020).…”

Section: Unit Weightsupporting

confidence: 88%

“…It is thought that this increase may be due to the hydrothermal interaction of the free lime released during the hydration reaction and the silica contained in the pumice as a result of the temperature increase. It has been determined that these values are compatible with the studies (Saad et al 2020;Choe et al 2019;Alfahdawi et al 2019;Eidan et al 2019).…”

Section: Figure 7 the Effect Of High Temperature On Compressive Strengthsupporting

confidence: 76%

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The Properties of Glass Fiber Reinforced Lightweight Concrete under the Effect of High Temperature

2022

CER

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This study aimed to produce lightweight concrete by using 50% pumice as coarse aggregate and 0.1% and 0.3% glass fiber. It is aimed to investigate the changes that will occur in the compressive strength and splitting tensile strength properties of the samples when this lightweight concrete produced is exposed to temperatures of 150 °C, 300 °C, 450 °C and 600 °C. The study was carried out in six stages. In the first stage, reference samples were produced. In the second stage, 0.1% and 0.3% glass fiber reinforced lightweight concrete samples were produced. In the third stage, unit weight, porosity, compressive strength and splitting tensile strength tests were applied to the produced samples. In the fourth step, the samples were gradually exposed to different temperatures (150 °C, 300 °C, 450 °C and 600 °C). In the fifth stage, compressive strength and splitting tensile strength tests were applied to the samples exposed to high temperature. In the sixth and final stage, SEM images of 0.1% glass fiber reinforced lightweight concrete samples were analysed. As a result, it was observed that the unit weight value decreased and the porosity values increased with glass fiber reinforcement. There was also an increase in compressive and splitting tensile strengths. In addition, it was observed that the samples exposed to 150 oC temperature had the highest compressive strength and splitting tensile strength. In the analysis of SEM images, with the increase in temperature, it was determined that the samples in microstructure changed into macrostructure as well as the cracks occurred in the sample structure. The importance of this study stem from increasing tensile strength of lightweight concrete with glass fiber reinforcement so as to prevent loss of life and property in an earthquake.This study is important because it increases the tensile strength of lightweight concrete with low tensile strength with glass fiber reinforcement. This will result in less loss of life and property in an earthquake.

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Section: Unit Weightsupporting

confidence: 88%

Section: Figure 7 the Effect Of High Temperature On Compressive Strengthsupporting

confidence: 76%

The Properties of Glass Fiber Reinforced Lightweight Concrete under the Effect of High Temperature

2022

CER

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“…This indicates that when considering the perfect Brazilian Journal of Development, Curitiba, v.9, n.1, p. 4036-4056, jan., 2023 adhesion between the fiber and the matrix and that has a good correlation with the possible real performance of the composite. With regard to concrete and fiber composites, both short fibers and long fibers increase KI as shown in the studies by Saad et al,2020, indicating the good potential of using carbon fibers in a cementitious matrix. These researchers observed an increase in the flexural strength and fracture toughness using the aligned fibers, which is the same behavior observed in this study.…”

Section: Numerical Analysis and Analytical Analysismentioning

confidence: 59%

“…Most of the existing research related to the determination of KI is on concrete with short fibers (carbon, polymer, glass, or natural). The short fibers improve little stress Brazilian Journal of Development, Curitiba, v.9, n.1, p. 4036-4056, jan., 2023 concentration factor in relation to long fibers (Jorbat, et al, 2020;Karamloo, et al,2020;Saad, et al,2020) Safiuddin et al, (2018 researched concrete with short carbon fibers ranging from 0% to 1%, where they observed a significant increase in the flexural strength and fracture toughness up to 0.25% of the volumetric fraction of carbon fibers. However, the compressive strength decreases with increased fiber concentration.…”

Section: Introductionmentioning

confidence: 99%

Analytical and finite element analysis of the concrete stress intensity factor with carbon fibers

Sousa¹,

Macêdo²

2023

Braz. J. Develop.

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Concrete is a material with low tensile strength and fracture resistance. One way to improve these properties is through the insertion of synthetic fibers such as carbon fibers into the concrete. This work determined the stress intensity factor for concrete with aligned carbon fibers (laminate) using an analytical model and finite element methods – macro-mechanical analysis of the composite laminate using the ABAQUS finite element package. Symmetrical laminate models were used with carbon fibers ranging from ± 15° to ± 75°. A single-edge notch bending specimen geometry was used to determine the KI of the laminates. The mechanical properties of the laminate were obtained through analytical models of the laminate theory. Results indicate that the fiber angles influence the stress intensity factor. The behavior is practically linear and a strong correlation was observed between the angle of the fibers and the KI through Pearson’s r. The laminate with a fiber angle of ± 75° showed a higher KI value compared to the others (x14 about ± 15°). Comparisons of the analytical and numerical results showed good agreement in the determined KI.

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“…Natural fibers have a huge market that moves billions of dollars every year [1]. Despite several studies having been conducted on the reuse of natural fibers waste [2][3][4], there is still a long way to go, especially when it comes to specific companies' issues. The maintenance of industrial sustainability is extremely dependent on the correct application of these natural resources.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Polypropylene and Jute Fiber-Reinforced Composites Exposed to Natural and Accelerated Aging: Mechanical Properties and Wettability

2021

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Population growth and the way resources are being exploited are directly affecting the environment. The natural fiber market, for example, is worth billions of dollars and a huge amount of the fibers becomes waste. This considerable amount of waste motivates the study of the fibers as a reinforcement in polymeric matrix, which benefits both the environmental sustainability and technical-commercial development of new materials with good properties and reduced cost. In this study, jute fiber-reinforced composites previously manufactured from an industrial waste (W), polypropylene, compatibilizer, and nano-calcium carbonate (N), were exposed to natural and accelerated aging. The composites were tested by infrared spectroscopy, contact angle (CA) measurement, and tensile test. Infrared analysis showed greater oxidative degradation after accelerated aging. All CA values continued above 90° after natural aging. Among all compositions, the ones with the presence of N had the highest CA values, showing that N acted as a waterproofing agent. After accelerated aging, a significant decrease in all CA values was observed. The composites did not show significant variation in the elastic modulus after either aging. Deformation at break decreased significantly for compositions with no jute fiber in both aging programs. No remarkable reduction was observed in the compositions with jute fibers.

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Improving the brittle behavior of high strength concrete using banana and palm leaf sheath fibers

Cited by 46 publications

References 39 publications

The Properties of Glass Fiber Reinforced Lightweight Concrete under the Effect of High Temperature

The Properties of Glass Fiber Reinforced Lightweight Concrete under the Effect of High Temperature

Analytical and finite element analysis of the concrete stress intensity factor with carbon fibers

Degradation of Polypropylene and Jute Fiber-Reinforced Composites Exposed to Natural and Accelerated Aging: Mechanical Properties and Wettability

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