Creep and Shrinkage of Fibre-Reinforced Concrete and a Guide for Modeling

Kohoutková, Alena; Vodička, Jan; Kř́ıstek, Vladiḿır

doi:10.1061/9780784479346.084

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…The fresh mixture from each half of the cylinder was diluted by additional water and a strong magnet was used to separate the steel fibres from the rest of the mixture. The steel fibres were then dried and weighed to obtain the exact weight ratio of steel fibres in the upper and lower halves of the concrete cylinder [6]. Compressive and flexural strength tests.…”

Section: Methodsmentioning

confidence: 99%

High Performance and Ultra-High Performace Fibre Reinforced Concrete with Stabilized Homogeneity

Musil,

Vesecky,

Kubat

et al. 2024

DDF

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This paper describes the segregation of fibres in high performance and high strength concretes. It focuses on both laboratory and practical conditions. It compares different mixtures produced and processed in the laboratory and in the precast concrete company. Two methods are chosen in the paper to avoid fibre segregation. The first method is a suitable mix design considering the water/cement ratio and the amount of superplasticizer. The second method is the addition of synthetic fibres to the mixture while maintaining sufficient workability. The paper examines the consistence of each mixture according to the concrete placement location, segregation of fibres in the fresh mixture and hardened composite. Both methods under laboratory and practical conditions have shown a positive impact on the reduction of segregation of steel fibres in the mixture. Simultaneously, the strength properties of all mixtures were compared, which depended mainly on the type of synthetic fibres used.

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Section: Methodsmentioning

confidence: 99%

High Performance and Ultra-High Performace Fibre Reinforced Concrete with Stabilized Homogeneity

Musil,

Vesecky,

Kubat

et al. 2024

DDF

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“…Influence of subsoil can be excluded. The most probably causes of cracks are deformation associated with shrinkage and creep of concrete [15]. Shrinkage and creep of concrete can be prevented by curing of fresh concrete and other provisions [16,17].…”

Section: The Most Often Causes Of Failures and Their Surveymentioning

confidence: 99%

Frequent Failures of FRC Industrial Floors

Čajka

Smirakova

Matečková

2017

KEM

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Floors in industrial buildings are often loaded with heavy traffic or stored material. For this reason floors are often created by fiber-reinforced concrete. Fibers contribute to larger impact - or abrasion resistance. The issue of design of fiber concrete slabs is quite complicated. Poorly designed layer structure under slabs or poorly subsoil can have very important effect of result properties and create the first group of source of problem. The second group of causes of problems is real implementation of concrete slab primarily the amount of fibers and correct and even placement. If amount or placement of fibers are incorrectly then significant failure can arise. This paper deals with frequently failures of FRC floors in practice. It will be described several buildings in which were fiber concrete slab constructed and where some failure arose. It will be presented what kind and what range of failure arose. Causes of failures will be also described in this paper. Also possible solution of problem will be designed if it exist.

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“…As compressive strength was used, its strength was calculated experimentally on the concrete cylinders. In addition, for the modeling of steel fiber reinforced concrete, the coefficient reduction of compressive strength was modified (due to cracks resulting from the value of plain concrete (0.2)) to the value of steel fiber reinforced concrete (1.0) [3,4]. At the same ratio as that between the fracture energy of concrete and steel fiber reinforced concrete, there was also an increased item called Critical Compressive Displacement Wd.…”

Section: Nonlinear Fe Analysismentioning

confidence: 99%

Experimental and Theoretical Analysis of I-Pillars of Noise Barriers Made of Prestressed Steel Fiber Concrete, Prestressed Concrete and Reinforced Concrete with Footings Length of 600 mm

Čech

Kolı́sko

Tej

et al. 2016

KEM

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This paper deals with the experimental testing and theoretical analysis of the flexural load-bearing capacity of I-shaped pillars in noise barriers made of reinforced concrete, prestressed concrete and prestressed steel fiber reinforced concrete. The pillars were loaded as a cantilever under a flexural load, which corresponds to their actual loading when the effect of wind on the panels of the noise barrier is taken into account. For the purpose of the present research, three specimens of I-pillars were tested. The results of the experimental loading tests, as well as the calculated results and the comparison between them, are herein presented.

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Creep and Shrinkage of Fibre-Reinforced Concrete and a Guide for Modeling

Cited by 5 publications

References 3 publications

High Performance and Ultra-High Performace Fibre Reinforced Concrete with Stabilized Homogeneity

High Performance and Ultra-High Performace Fibre Reinforced Concrete with Stabilized Homogeneity

Frequent Failures of FRC Industrial Floors

Experimental and Theoretical Analysis of I-Pillars of Noise Barriers Made of Prestressed Steel Fiber Concrete, Prestressed Concrete and Reinforced Concrete with Footings Length of 600 mm

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