Fracture study of concrete composites with synthetic fibers additive under modes I and III using ENDB specimen

Aliha, M.R.M.; Razmi, A.; Mousavi, Ahmad

doi:10.1016/j.conbuildmat.2018.09.149

Cited by 103 publications

(22 citation statements)

References 39 publications

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“…On the other hand, natural and synthetic fibres (e.g., jute fibre and polyaramid FORTA fibre) with different sizes and volumes or weight percentages are among the previously used materials for mixing in the composition of asphalt mixture as reinforcing material. [53][54][55][56][57][58][59][60] For manufacturing the HMA mixture of this research, LDPE additive (in the granule shape shown in Figure 7) was used as binder modifier, and the fracture toughness results of such modified HMA mixture were compared with the control and unmodified HMA mixture to examine the effect of this modifier on lowtemperature cracking response of asphalt materials. For…”

Section: Materials and Fracture Toughness Testingmentioning

confidence: 99%

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Shahryari

Keymanesh

Aliha

2020

Fatigue Fract Eng Mat Struct

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Mode I fracture resistance of two asphalt mixtures (control and modified with low‐density polyethylene [LDPE] as binder additive) was studied experimentally and theoretically. The fracture toughness experiments were conducted on edge notch disc bend, edge notch disc compression and semi‐circular bend configurations under two loading rates and two low temperatures. The fracture resistance was increased by increasing the loading rate, reducing the test temperature and adding the LDPE additive. A discrepancy due to the influence of specimen geometry and its loading type was also observed on the measured critical stress intensity factors, demonstrating the effect of specimen type on mode I fracture behaviour. By considering the maximum normal strain value as constant material property and taking into account the effect of T‐stress, the fracture toughness value for any of the investigated mode I samples was estimated in terms of the fracture results of the other specimens.

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Section: Materials and Fracture Toughness Testingmentioning

confidence: 99%

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Shahryari

Keymanesh

Aliha

2020

Fatigue Fract Eng Mat Struct

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“…Adding a 0.3% dosage of jute fiber in concrete does not significantly improve the resistance to fracture. Aliha et al [ 24 ] reported that the initiation of fractures and stages of propagation are affected significantly by the content of synthetic forta-ferro (SFF) fibers. Fracture toughness was higher in SFF (0.3%) based concrete than plain cement concrete due to the cracking resistance against both tear and tensile loads.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

et al. 2021

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This research aims to examine the fracture toughness of hybrid fibrous geopolymer composites under mode II. For this purpose, eight geopolymer mixtures were cast and tested to evaluate the influence of steel and synthetic fiber hybridization on mode II fracture response. The first mixture was plain and was kept as a reference, while steel, polypropylene and glass fibers were used in the rest seven mixtures. The first three of which were mono-reinforced with one of the three fibers, while the rest of the four were hybrids reinforced with combinations of steel and synthetic fibers. The Brazilian center notched disc and the double notched cube test configurations were used to evaluate the mode II fracture toughness of the eight mixtures. The results of the tests showed that steel fibers played the vital role in enhancing the fracture toughness, where the mixtures S1.6 and S1.3G0.3 showed the best performance. The results also showed that increasing the notch depth decreased the fracture toughness with an approximate linear decrement fashion. It was found that the use of double-notched cubes resulted in much higher fracture toughness than the Brazilian notched discs, where the ratio of normalized fracture toughness of the disc specimens to cube specimens was approximately 0.37 to 0.47. This is attributed to the concentration of stresses along one defined path in the disc specimens compared to the multi-path stresses in the cube specimens. In addition, the accompanied tensile stresses in the disc specimens may lead to a mode I fracture before the designed mode II fracture.

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“…These two parameters can be determined experimentally by means of appropriate laboratory testing methods. Some test specimens usually in the shape of circular discs including diametral compact-tension (DCT) specimen, [1][2][3][4] centre cracked Brazilian disc specimen, 5 semicircular bend (SCB) specimen, [6][7][8][9][10][11][12][13][14][15][16][17][18][19] edge notch disc bend (ENDB) specimen [20][21][22][23][24][25][26] and edge notch disc diametral compression (ENDC) specimen 27,28 are usually used for conducting the fracture toughness experiments on asphalt mixtures. In addition, beam shape specimens such as rectangular beam specimen containing an edge crack and subjected to three-point bending (TPB) or four-point bending (FPB) [29][30][31][32][33][34][35] or wedge-splitting cube (WSC) 36,37 samples are among the other miscellaneous fracture test specimens employed by the asphalt and bituminous researchers.…”

Section: Introductionmentioning

confidence: 99%

K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

Yuan

Tian

Liu

et al. 2020

Fatigue Fract Eng Mat Struct

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Pure mode I and mode II fracture toughness of asphalt mixture was investigated both experimentally and theoretically using vertical edge crack semicircular bend (SCB) specimen with symmetric and asymmetric bottom loading spans. The thickness of SCB specimen was considered in the range from 30 to 70 mm, and the fracture toughness tests were performed at three subzero temperatures (−5 C, −15 C and −25 C). The results showed that K Ic and K IIc are increased by reducing the test temperature. The thickness had no sound effect on the fracture toughness, but the thickness of 50 mm was more suitable for fracture study on this material. The fracture load of mode II specimen was significantly greater than the mode I fracture load at the same testing condition. The fracture toughness ratio (K IIc /K Ic) that varies in the range between 1 and 1.4 was predicted theoretically using three well-known stress/strainbased fracture criteria. K E Y W O R D S asphalt mixture, fracture toughness ratio prediction, K Ic and K IIc value, low temperature, symmetric and asymmetric SCB specimens, thickness effect

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Fracture study of concrete composites with synthetic fibers additive under modes I and III using ENDB specimen

Cited by 103 publications

References 39 publications

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

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Fracture study of concrete composites with synthetic fibers additive under modes I and III using ENDB specimen

Cited by 103 publications

References 39 publications

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Specimen type effect on measured low‐temperature fracture toughness of asphalt concrete

Evaluation of Mode II Fracture Toughness of Hybrid Fibrous Geopolymer Composites

KIcandKIIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses

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K_IcandK_IIcmeasurement for hot mix asphalt mixtures at low temperature: Experimental and theoretical study using the semicircular bend specimen with different thicknesses