Influence of fibres and hardening accelerator on concrete for rigid pavements

Kos, Željko; Kroviakov, Sergii; Kryzhanovskyi, Vitalii; Crnoja, Andjelko

doi:10.1680/jmacr.22.00181

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…Steel fiber also reduces the shrinkage of concrete pavement during hardening, which is important for road pavements [12].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

Kos,

Kroviakov,

Mishutin

et al. 2023

Materials

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The complex effect of the amount of cement, polypropylene fiber (the fiber length was 39 mm, and the diameter was 0.45 mm), and polycarboxylate superplasticizer on concrete properties for rigid pavement was determined using the methods of experiment planning and experimental–statistical modeling. The fluidity of all the mixtures was S1. The W/C of the mixtures depended on the composition of the concrete and variable from 0.32 to 0.46. It was found that, by increasing the amount of superplasticizer from 1% to 1.8–2%, the compressive strength of concrete increased by 4.5–6 MPa after 3 days and by 7–9 MPa after 28 days. The flexural strength in this case increased by 0.6–0.9 MPa. The use of polypropylene fiber in the amount of 1.5–1.8 kg/m3 increased the compressive strength of concrete by an average of 3 MPa, increased the flexural strength by 0.5–0.6 MPa, reduced the abrasion capacity by 9–14%, and increased the frost resistance by up to 50 cycles. When using a rational amount of superplasticizer and fiber, the compressive strength of concrete, even with a minimum cement amount of 350 kg/m3, was at least 65 MPa, its flexural strength was at least 6 MPa, its frost resistance was F200, and its abrasion capacity was not more than 0.30 g/cm2. Concrete with such properties can be used for roadways of any type. Low abrasion capacity and high frost resistance provide the necessary durability of concrete for rigid pavement during operation.

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“…Steel fiber also reduces the shrinkage of concrete pavement during hardening, which is important for road pavements [12].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

Kos,

Kroviakov,

Mishutin

et al. 2023

Materials

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“…Control of the structure and properties of concrete on secondary aggregates is carried out by methods that are generally similar to methods of controlling of "ordinary" concrete on mass-using aggregates [12]. For concrete road surfaces and their bases, dispersed reinforcement is one of the most effective methods of increasing the tensile strength, frost resistance, and wear resistance [13,14]. Various types of fibres are used in road construction, but polypropylene, glass, and basalt fibres are the most effective considering cost and corrosion resistance [15,16].…”

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confidence: 99%

Properties of Concrete and Fiber-Reinforced Concrete for Bases of Road Clothes Based on Secondary Aggregates With Heterogeneous Composition

Kroviakov,

Chystiakov

2024

Modern Construction and Architecture

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The problem of disposal of concrete scrap of dismantled building structures is relevant for most countries of the world. For Ukraine, this problem is even more acute due to the significant amount of destruction caused by hostilities and rocket attacks. In current research the properties of concrete and fibre-reinforced concrete for the bases of road clothes based on natural and secondary aggregates were compared: granite river gravel, secondary crushed stone with a heterogeneous composition, quartz sand and secondary sand from recycled reinforced concrete structures. CEM III/A slag Portland cement with a blast furnace slag content of 65% and a polycarboxylate type superplasticizer were used. Three series of samples were studied: without fibre; with glass fibre ANTI-CRAK HP 12 (length 12 mm, diameter 0.017 mm, equivalent thread diameter 0.3 mm) in the amount of 1 kg/m3; with polypropylene fibre BeneSteel 55 (length 55 mm, equivalent thread diameter 0.48 mm) in the amount of 4 kg/m3. In each series, concrete on granite gravel and quartz sand, concrete on secondary crushed stone and quartz sand, concrete on secondary crushed stone and secondary sand were studied. The workability of all mixtures was equal to S1. Due to the use of different types of aggregates and fibres, the W/C of concrete mixtures differed significantly. Concretes on secondary aggregates had a higher W/C than on natural aggregates. When using the Anti-Crak HP 12 fibre, the mobility of mixtures with equal W/C increased by 5.5 – 6.9 %. When using BeneSteel 55 fibre, W/C increased by 10.6 – 15.5 %. The type of aggregate had a significant effect on the average density of concrete. When using secondary crushed stone and quartz sand, the average density decreased by 3.8 – 4.6 %. When using secondary crushed stone simultaneously with secondary sand, the average density of concrete decreased by 5.2 – 8.5 %. When using Anti-Crak HP 12 fiber, the average density of concrete decreases by 2 %, when using BeneSteel 55 fibre – up to 4.1 %. Concretes on secondary crushed stone with heterogeneous composition and quartz sand had 4 % higher compressive strength and 2 % higher tensile strength in bending than concretes on granite gravel and similar sand (29.8 MPa and 3.18 MPa, respectively). When secondary crushed stone is used simultaneously with secondary sand, the compressive strength of concrete is only 1.1 % lower than the strength of concrete on natural aggregates, and the tensile strength in bending is 10 % lower. This confirms the possibility of effective use of these concretes for arranging of bases of road clothes. The high-quality performance of secondary aggregates in concrete explains due to their better adhesion to the cement-sand matrix. Dispersed fibre reinforcement with Anti-Crak HP 12 has a positive effect on the compressive strength of concrete on all types of aggregate and increases the tensile strength of concrete on natural aggregates. The use of BeneSteel 55 fibre was not effective due to a significant increase in the W/C of the mixture when it was introduced. In general, taking into account the economic factor, dispersion reinforcement of concrete on secondary aggregates with the types of fibres used in the research is not advisable.

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“…For Ukraine, one of the main factors affecting the operational quality of the road surface is the damage caused by the cyclic effects of a dynamic influence and the action of freezing and thawing [3,4,6]. As the studies of many authors show, in such conditions, the most effective materials are fiber concrete with corrosion-resistant dispersed reinforcement [7][8][9][10][11]. Polypropylene, basalt, metal and glass fibers are most often used in road construction [8,9,11,12].…”

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confidence: 99%

“…As the studies of many authors show, in such conditions, the most effective materials are fiber concrete with corrosion-resistant dispersed reinforcement [7][8][9][10][11]. Polypropylene, basalt, metal and glass fibers are most often used in road construction [8,9,11,12]. The use of fiber allows to increase the frost resistance and wear resistance of concrete, as well as their tensile strength and crack resistance.…”

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confidence: 99%

Durability of Rigid Pavement Concrete Reinforced With Basalt Fiber

Kroviakov,

Shestakova

2024

Modern Construction and Architecture

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The purpose of the work is the development of fiber-reinforced concrete compositions for rigid pavements with properties of high strength, frost resistance and wear resistance due to the use of polycarboxylate type superplasticizer and dispersed reinforcement. The experiments were conducted according to an optimal 3-factor 15-point plan. The following composition factors were varied: the amount of Portland cement CEM I 42.5 R (from 290 to 350 kg/m3); the amount of basalt fiber BAUCON®-bazalt (from 0.9 to 1.5 kg/m3); the amount of polycarboxylate superplasticizer STACHEMENT 2570/5/G (from 0.6 to 1 % by weight of cement). The workability of all developed mixtures was S1, which corresponded to a cone slump 2...3 cm. Research results shows when increasing the amount of cement and the amount of superplasticizer to 0.9 – 1.0 %, the W/C of the mixtures decreases. The amount of basalt fiber practically does not affect the W/C of the mixture. Due to increase in the amount of Portland cement, the strength of fiber-reinforced concrete is increases, as expected. With an increase in the amount of basalt fiber to 1.3 – 1.4 kg/m3, the tensile strength in bending of concrete increases by 12 – 21 %, while the compressive strength changes insignificantly. Fiber concrete with a superplasticizer content of about 0.9 % has the highest compressive and tensile strength in bending. Moreover, due to increase in the amount of Portland cement from 290 to 350 kg/m3, the frost resistance of concrete increases to about 100 cycles. Due to the increase in strength of that composition, the wear resistance of concrete was increased. With an increase in the amount of basalt fiber from 0.9 to 1.3 – 1.4 kg/m3, the wear resistance of concrete increases by 11 – 16 %, and frost resistance increases to approximately 50 cycles. The change in the amount of superplasticizer has little effect on the wear resistance of concrete. However, with an increase in the amount of additive STACHEMENT 2570/5/G from 0.6 to 0.9 % by weight of cement, the frost resistance of fiber-reinforced concrete increases to about 50 cycles. Fiber concretes with a rational amount of dispersed reinforcement (1.3 – 1.4 kg/m3) and superplasticizer (0.9 %), depending on the amount of cement, have compressive strength from 43 to 60 MPa; tensile strength in bending from 4.9 to 6.4 MPa; wear resistance from 0.31 to 0.37 g/cm2 and frost resistance from F200 to F300. This ensures the high durability of the developed fiber-reinforced concrete for rigid pavements.

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Influence of fibres and hardening accelerator on concrete for rigid pavements

Cited by 3 publications

References 20 publications

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

Properties of Concrete and Fiber-Reinforced Concrete for Bases of Road Clothes Based on Secondary Aggregates With Heterogeneous Composition

Durability of Rigid Pavement Concrete Reinforced With Basalt Fiber

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