Effect of Fibre Reinforced Concrete and Behaviour in Rigid Pavement

Kabashi, Naser; Krasniqi, Cene; Hadri, Ragip; Sadikaj, Anite

doi:10.18178/ijscer.7.1.29-33

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…To solve the above-described issues, concretes with fiber reinforcement have been widely used in highway engineering, in which different fiber types are used: steel, basalt, polypropylene and glass [12][13][14][15]. The usage of fiber permits increases in crack resistance and the most important parameters for rigid pavements-flexural strength and reduced abrasion [16].…”

Section: Introductionmentioning

confidence: 99%

Research of Strength, Frost Resistance, Abrasion Resistance and Shrinkage of Steel Fiber Concrete for Rigid Highways and Airfields Pavement Repair

et al. 2022

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High-early strength fiber-reinforced concretes are effective materials for the full depth repair of rigid highway and airfield pavements. A comprehensive study was carried out on the influence of the amount of steel anchor fiber and hardening accelerator on properties that are important for repairing concrete. A two-factor experiment was carried out, in which the influence of the hardening accelerator and fiber dosages on the strength, frost resistance, wear resistance and shrinkage of repaired steel-fiber-reinforced concrete for rigid pavements was studied. The investigated concretes contained 400 kg/m3 of cement and polycarboxylate plasticizer in the amount of 1.2% of the cement content. It has been established that the optimal concrete compositions are with the amount of Sika Rapid 3 hardening accelerator from 1 to 2% of the cement content and the steel fiber amount from 60 to 90 kg/m3. Optimal fiber-reinforced concrete compositions have a reduced shrinkage during hardening, and at the age of 2 days they have a compressive strength of at least 55 MPa and a flexural strength of at least 8.5 MPa. At the design age, the fiber-reinforced concrete compressive strength is 85–90 MPa, its flexural strength ranges from 15.5 to 17.5 MPa, it has a frost resistance of F200 and abrasion not higher than 0.24 g/cm2. These properties ensure the high durability of the repair material.

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Section: Introductionmentioning

confidence: 99%

Research of Strength, Frost Resistance, Abrasion Resistance and Shrinkage of Steel Fiber Concrete for Rigid Highways and Airfields Pavement Repair

et al. 2022

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“…In [7], it is recommended to use fiber-concrete mixtures with the amount of steel fiber from 25 to 50 kg/m 3 as repair material, and it is noted that the most effective use of such repair materials on highways with a rigid pavement. In [8], it is recommended to introduce steel fiber in combination with an air-entraining admixture and a plasticizer. It is shown in [9] that using rational amount of a hardening accelerator, steel anchor fiber and superplasticizer allows achieving modified fiber concretes that are characterized by high compressive strength and flexural strength at an early age and at the age of 28 days.…”

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confidence: 99%

Influence of Fiber Reinforcement on Concrete Shrinkage for Rigid Road and Airfield Pavement Repair

Kroviakov¹,

Kryzhanovskyi²

2021

BOSACEA

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Abstract. The influence of fiber reinforcement with steel anchor fiber on the shrinkage of modified concrete for rigid airfield pavements repair has been determined. A 2-factor experiment was carried out, in which the following composition factors were varied: the amount of hardening accelerator Sika Rapid 3 from 0 to 2.4% of the cement content (0-9.6 kg/m3); the amount of steel anchor fiber with 1 mm diameter and 50 mm length, from 0 to 100 kg/m3. For the concrete batching were used: Portland cement CEM II / AS 42.5 in the amount of 400 kg/m3, granite crushed stone 5-20 mm, quartz sand, plasticizer admixture BASF MasterGlenium SKY 608 in the amount of 1.2% by cement content. The workability of the mixtures was S2 (6-8 cm); W/C ratio depended on the concrete composition. Due to the use of superplasticizers, the W/C of all investigated mixtures was in the range of 0.309-0.343. The shrinkage of the prism specimens was recorded after 3 hours, 6 hours, 1, 2, 3 and 7 days of being in air-dry conditions. The shrinkage process does not end after 7 days of concrete hardening, however, the general nature of the influence of variable factors on its value remains. It has been established that fiber-reinforced concretes, with a fiber amount of 50 kg/m3 and with a fiber amount of 100 kg/m3, have 10-15% less shrinkage compared to unreinforced concretes. Compositions with a fiber amount of 50 kg/m3 and 100 kg/m3 have practically the same shrinkage, which is explained by an increase in W/C ratio with an increase in the amount of fiber reinforcement. The amount of hardening accelerator has a less noticeable effect on the amount of concrete shrinkage. By adding Sika Rapid 3, concrete shrinkage at the age of 7 days is reduced by 2-9%. This effect can be explained by the fact that internal stresses arising in the process of structure formation and moisture loss in concrete are contained in a more durable cement-sand matrix. The concrete shrinkage without fiber and accelerator was also measured up to the age of 98 days. It was found that the limiting shrinkage for such concrete is 2.5×10-4. The analysis of the drawn experimental-statistical model showed that with the amount of metal fiber from 60 to 90 kg/m3 and the amount of the hardening accelerator from 0.9 to 2.4%, the shrinkage of the investigated concretes is minimal (7 = 1.3×10-4). Thus, the use of fiber reinforcement with anchor steel fiber and a hardening accelerator can significantly reduce the concrete shrinkage for the rigid airfield pavements repair is important for this material.

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Improvement in the flexural behaviour of road pavement slab concrete containing steel fibre and silica fume

Fattouh

Tayeh

Agwa³

et al. 2023

Case Studies in Construction Materials

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Effect of Fibre Reinforced Concrete and Behaviour in Rigid Pavement

Cited by 5 publications

References 2 publications

Research of Strength, Frost Resistance, Abrasion Resistance and Shrinkage of Steel Fiber Concrete for Rigid Highways and Airfields Pavement Repair

Research of Strength, Frost Resistance, Abrasion Resistance and Shrinkage of Steel Fiber Concrete for Rigid Highways and Airfields Pavement Repair

Influence of Fiber Reinforcement on Concrete Shrinkage for Rigid Road and Airfield Pavement Repair

Improvement in the flexural behaviour of road pavement slab concrete containing steel fibre and silica fume

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