Evaluation of Interfacial Fracture Toughness and Interfacial Shear Strength of Typha Spp. Fiber/Polymer Composite by Double Shear Test Method

Ikramullah, Ikramullah; Rizal, Samsul; Nakai, Yoshikazu; Shiozawa, Daiki; Khalil, H. P. S. Abdul; Thalib, Sulaiman

doi:10.3390/ma12142225

Cited by 18 publications

(6 citation statements)

References 46 publications

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“…IFSS increased in fibers by alkali treatment from UF of 2.49 MPa to 2.94 MPa for Al 3 treatment and in Al 6 by 3.67 MPa. Increased shear forces in alkaline treatment of typha fibers with a concentration of 5% NaOH from 1.48 MPa to 3.05 MPa [42]. Coconut fibers soaked with NaOH at a concentration of 5% for 72 h increased IFSS by 55.60% [43].…”

Section: H Interfacial Shear Strength (Ifss) Test Resultsmentioning

confidence: 99%

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The Effect of Alkali and Fumigation Treatments on King Pineapple Fiber Properties and Interfacial Bonding of King Pineapple Fiber/Unsaturated Polyester on Microcrystalline Cellulose Reinforced Composite

Sakuri¹,

Sugiarto²,

Sugiantoro³

et al. 2021

Journal of Southwest Jiaotong University

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This study aims to determine and compare the effect of alkaline and fumigation treatment on the properties of King pineapple fibers (KPF) and the interfacial bond between King pineapple fibers/ unsaturated polyester and microcrystalline cellulose. Chemically, King pineapple fiber was extracted and dried at room temperature. The fiber was made using the alkaline method by soaking in 5% NaOH for 4 hours, 6 hours, 8 hours, and 10 hours. The fumigation treatment method was carried out for 0 hours, 4 hours, 8 hours, and 12 hours. The single fiber tensile strength test results showed an increase of 51.99% after the fumigation treatment and 59.62 % after the alkaline treatment. The increase in interface shear strength (IFSS) was 32.12% after fumigation treatment and 47.38% after alkaline treatment. The increase in fiber tensile strength and interfacial shear strength (IFSS) is caused by the loss of hemicellulose, pectin, lignin, and other impurities. These results indicate that the alkaline treatment is still better than the fumigation treatment.

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Section: H Interfacial Shear Strength (Ifss) Test Resultsmentioning

confidence: 99%

“…Coconut fibers soaked with NaOH at a concentration of 5% for 72 h increased IFSS by 55.60% [43]. The condition of increasing the interfacial shear force on the fibers is due to increased surface roughness; the amount of hemicellulose, lignin, and pectin was reduced after alkaline treatment [42].…”

Section: H Interfacial Shear Strength (Ifss) Test Resultsmentioning

confidence: 99%

The Effect of Alkali and Fumigation Treatments on King Pineapple Fiber Properties and Interfacial Bonding of King Pineapple Fiber/Unsaturated Polyester on Microcrystalline Cellulose Reinforced Composite

Sakuri¹,

Sugiarto²,

Sugiantoro³

et al. 2021

Journal of Southwest Jiaotong University

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“…Fracture toughness under shear of some of the above-mentioned structural elements are presented, among others, in papers [ 100 , 101 , 102 , 103 , 104 , 105 , 106 ]. The wide range of examples of constructions, in which mode II fracture may determine the destruction, show the undoubted importance of the analyzed scientific problem.…”

Section: The Importance Of Researchmentioning

confidence: 99%

Changes in the Fracture Toughness under Mode II Loading of Low Calcium Fly Ash (LCFA) Concrete Depending on Ages

Golewski

2020

Materials

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This study investigated the influence of the curing time on the fracture toughness of concrete produced with different content of low calcium fly ash (LCFA). During the study, the amounts of 20% and 30% of pozzolanic additive were used. In order to observe the effect of the applied pozzolanic additive on the analyzed concrete properties, the obtained results were compared with the values obtained for the reference concrete. Compressive strength—fcm and fracture toughness, by using mode II loading—KIIc (shearing), were determined between the 3rd and 365th days of curing. In the course of experiments, changes in the development of cracks in individual series of concrete were also analyzed. In addition, the microstructures of all composites and the nature of macroscopic crack propagation in mature concretes were assessed. It was observed that the greatest increase in fracture toughness at shear was in the case of reference concrete during the first 28 days, whereas, in the case of concretes containing LCFA, in the period of time above 4 weeks. Furthermore, concrete without the LCFA additives were characterized by a brittle fracture. In contrast to it, concretes with LCFA additives are mainly characterized by a quasi-plastic process of failure. Moreover, most of the samples showed a typical pattern of the destruction that occurs as a result of shearing. The presented test results may be helpful in selecting the composition of concrete mixtures containing LCFA to be used in concrete and reinforced concrete structures subjected to shear loads.

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“…However, from previous reports, it is known that the addition of FA to concrete has a positive effect on the parameters of fracture mechanics of 28-day and older concretes and a negative effect on the properties of composites at a young age [ 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. This disadvantageous property of the material could be improved by substituting the cement binder FA in combination with SF.…”

Section: Introductionmentioning

confidence: 99%

Studies of Fracture Toughness in Concretes Containing Fly Ash and Silica Fume in the First 28 Days of Curing

Golewski

Gil

2021

Materials

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This paper presents the results of the fracture toughness of concretes containing two mineral additives. During the tests, the method of loading the specimens according to Mode I fracture was used. The research included an evaluation of mechanical parameters of concrete containing noncondensed silica fume (SF) in an amount of 10% and siliceous fly ash (FA) in the following amounts: 0%, 10% and 20%. The experiments were carried out on mature specimens, i.e., after 28 days of curing and specimens at an early age, i.e., after 3 and 7 days of curing. In the course of experiments, the effect of adding SF to the value of the critical stress intensity factor—KIcS in FA concretes in different periods of curing were evaluated. In addition, the basic strength parameters of concrete composites, i.e., compressive strength—fcm and splitting tensile strength—fctm, were measured. A novelty in the presented research is the evaluation of the fracture toughness of concretes with two mineral additives, assessed at an early age. During the tests, the structures of all composites and the nature of macroscopic crack propagation were also assessed. A modern and useful digital image correlation (DIC) technique was used to assess macroscopic cracks. Based on the conducted research, it was found the application of SF to FA concretes contributes to a significant increase in the fracture toughness of these materials at an early age. Moreover, on the basis of the obtained test results, it was found that the values of the critical stress intensity factor of analyzed concretes were convergent qualitatively with their strength parameters. It also has been demonstrated that in the first 28 days of concrete curing, the preferred solution is to replace cement with SF in the amount of 10% or to use a cement binder substitution with a combination of additives in proportions 10% SF + 10% FA. On the other hand, the composition of mineral additives in proportions 10% SF + 20% FA has a negative effect on the fracture mechanics parameters of concretes at an early age. Based on the analysis of the results of microstructural tests and the evaluation of the propagation of macroscopic cracks, it was established that along with the substitution of the cement binder with the combination of mineral additives, the composition of the cement matrix in these composites changes, which implies a different, i.e., quasi-plastic, behavior in the process of damage and destruction of the material.

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Evaluation of Interfacial Fracture Toughness and Interfacial Shear Strength of Typha Spp. Fiber/Polymer Composite by Double Shear Test Method

Cited by 18 publications

References 46 publications

The Effect of Alkali and Fumigation Treatments on King Pineapple Fiber Properties and Interfacial Bonding of King Pineapple Fiber/Unsaturated Polyester on Microcrystalline Cellulose Reinforced Composite

The Effect of Alkali and Fumigation Treatments on King Pineapple Fiber Properties and Interfacial Bonding of King Pineapple Fiber/Unsaturated Polyester on Microcrystalline Cellulose Reinforced Composite

Changes in the Fracture Toughness under Mode II Loading of Low Calcium Fly Ash (LCFA) Concrete Depending on Ages

Studies of Fracture Toughness in Concretes Containing Fly Ash and Silica Fume in the First 28 Days of Curing

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