Experimental and analytical study of the mechanical and flexural behavior of hybrid fiber concretes

Nassani, Dia Eddin

doi:10.1016/j.istruc.2020.10.014

Cited by 27 publications

(9 citation statements)

References 11 publications

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“…This is because fiber reinforcement suppresses crack formation and growth, the main factors responsible for concrete fracture [31]. In addition, crack suppression is more effective with hybrid fiber mixtures than with single-type fibers [27][28][29][30]. In the current study, the hybrid fiber system satisfied the 4.2 MPa requirement after only 7 days.…”

Section: Splitting Tensile Strengthmentioning

confidence: 62%

“…Furthermore, hybrid fiber mixtures were more effective than single fiber mixtures in terms of strength enhancement. This can be attributed to the greater diversity in fiber length and diameter of the hybrid mixtures, which was more effective for filling voids within the concrete, thereby suppressing crack formation and growth [27,28]. Notably, the PVA+nylon hybrid fiber mixture developed the highest compressive strength.…”

Section: Compressive Strengthmentioning

confidence: 99%

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Strength and Durability of Hybrid Fiber-Reinforced Latex-Modified Rapid-Set Cement Preplaced Concrete for Emergency Concrete Pavement Repair

Shin

Park

2021

Applied Sciences

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The benefits of using reinforcing fibers in latex-modified rapid-set cement preplaced concrete for emergency pavement repairs were examined in terms of strength, permeability, and durability as functions of the type of fiber. Single-type fibers, including jute, poly (vinyl alcohol) (PVA), and nylon fibers, as well as hybrid fiber mixtures prepared with two of the aforementioned fibers at a 1:1 weight ratio, were evaluated. Fibers were incorporated into the concrete mixture at 1.2 kg/m3. A vibratory press compactor that simulates roller compaction was used to increase compaction and densification of the resulting pavement repair material. The hybrid fiber-reinforced latex-modified rapid-set cement preplaced concrete (HFLMC) was manufactured to satisfy the criteria for opening traffic, i.e., compressive strength of 21 MPa or higher, and flexural strength of 3.5 MPa or higher after 4 h. Pavement requiring repair was removed and replaced with coarse aggregate. The rapid-set binder, fibers, and latex were then mixed and placed onto the coarse aggregate layer. The repair was considered complete after compaction. The resulting HFLMC satisfied all of the test criteria. Furthermore, concretes made with hybrid fibers were more mechanically sound than those made with a single fiber variety. Hybrid fiber concretes made with PVA and nylon fibers exhibited the best properties for emergency pavement repair. These results indicate that HFLMC is suitable for emergency pavement repair.

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Section: Splitting Tensile Strengthmentioning

confidence: 62%

Section: Compressive Strengthmentioning

confidence: 99%

Strength and Durability of Hybrid Fiber-Reinforced Latex-Modified Rapid-Set Cement Preplaced Concrete for Emergency Concrete Pavement Repair

Shin

Park

2021

Applied Sciences

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“…Another option would be to maximize the effect of fiber reinforcement using a hybrid fiber [ 16 , 17 , 18 ]. Hybrid fiber improves the performance of concrete by simultaneously controlling the occurrence and growth of micro- and macro-cracks [ 17 , 18 , 19 ]. This approach has been described in many studies [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Hybrid fiber improves the performance of concrete by simultaneously controlling the occurrence and growth of micro- and macro-cracks [ 17 , 18 , 19 ]. This approach has been described in many studies [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Durability Properties of Latex-Modified Hybrid Fiber-Reinforced Roller-Compacted Rapid-Set Cement Concrete for Pavement Repair

Shin

Park

2021

Materials

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This study evaluated the mechanical properties and durability performance of latex-modified hybrid fiber-reinforced roller-compacted rapid-set cement concrete (LMHFRCRSC) for emergency repair of concrete pavement. Experimental parameters included the blend ratio of the hybrid fiber, which comprised natural jute fiber (0–0.2 vol.%) and structural synthetic fiber (0–2 vol.%). The mechanical performance of LMHFRCRSC of various blend ratios was evaluated in terms of compressive, flexural, and splitting tensile strength. Durability assessment included chlorine ion penetration and abrasion resistance measurements. Compressive and flexural strength values of 21 and 3.5 MPa, respectively, were the set targets after 4 h of curing; a compressive strength of 35 MPa, a flexural strength of 4.5 MPa, a splitting tensile strength of 4.2 MPa, and chloride ion penetration of 2000 C or less were required after 28 days of curing. Our test results confirmed that all mix proportions satisfied the target values, regardless of the blend ratio of the hybrid fiber. Specifically, the mechanical performance of the concrete improved as the blend ratio of the structural synthetic fiber increased. With regard to durability, a greater amount of jute fiber, a hydrophilic fiber, enhanced the concrete’s durability. Additionally, incorporating jute fiber of 0.6 kg/m3 provided excellent chlorine ion penetration resistance. The optimal blend ratio for the hybrid fiber was natural jute fiber at 0.6 kg/m3 and structural synthetic fiber at 13.65 kg/m3 (mix: J0.6 + P13.65); with this mix proportion, a chloride ion penetration amount of 1000 C or less and maximum mechanical performance were achieved.

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“…In another word, early age properties such as plastic shrinkage will be improved by small or soft fiber and mechanical properties will be enhanced by long or strong one [8][9][10] [11]. The usage of fibers in RC has been evaluated by many researchers [12]. It has been found that shear, tensile strength, and fracture toughness will be improved by fibers addition to concrete.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hybrid Fiber on Flexural Behavior of Green RC Beams in Oman Sea

Safayenikoo

2021

ijcoe

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Steel rebar corrosion because of the cracks in marine reinforced concrete (RC) structures is the main type of deterioration that leads to decrease the loadcarrying capacity, ductility, and service life. The use of different fibers such as steel fiber (SF), glass fiber (GF), and polypropylene fiber (PF) in RC beams can reduce the cracks and increase the load-bearing capacity and toughness of RC beams. Moreover, it seems that RC beams containing hybrid of SF, GF, and PF have been higher flexural capacity and toughness rather than RC composites with only one type of fiber. However, the role of mono or hybrid fiber will be depended on environmental conditions. Consequently, load-bearing capacity and toughness of Green RC beam with 15% metakaolin (MK) as a cement replacement, containing SF, PF, GF, (S+P)F, and (S+G)F as fibers, at 28, 90, and 180 days in tidal zone of Oman Sea were determined. The dimension of the beams was 200×200×750 mm. The fibers included macro and microfibers. Macro fiber was steel with 50 mm length. Microfibers were GF and PF with 12 mm length. Results indicated that by the addition of PF, GF, SF, (S+P)F, and (S+G)F to RC beams the load-bearing capacity and toughness are increased up to 41%. Meanwhile, the hybrid effect of fiber was more than the mono one.

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Experimental and analytical study of the mechanical and flexural behavior of hybrid fiber concretes

Cited by 27 publications

References 11 publications

Strength and Durability of Hybrid Fiber-Reinforced Latex-Modified Rapid-Set Cement Preplaced Concrete for Emergency Concrete Pavement Repair

Strength and Durability of Hybrid Fiber-Reinforced Latex-Modified Rapid-Set Cement Preplaced Concrete for Emergency Concrete Pavement Repair

Mechanical and Durability Properties of Latex-Modified Hybrid Fiber-Reinforced Roller-Compacted Rapid-Set Cement Concrete for Pavement Repair

Effects of Hybrid Fiber on Flexural Behavior of Green RC Beams in Oman Sea

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