Application of steel fibre concrete for underwater concrete slabs

Falkner, Horst; Henke, Volker

doi:10.1016/s0958-9465(98)00005-5

Cited by 17 publications

(12 citation statements)

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“…This may explain why steel fibres have been extensively adopted in construction of flat slabs, slabs on pile, and slab on ground. Higher flexural strength and much higher ductility has been reported for FRC slabs on grade as compared to similar concrete slabs made of plain concrete [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

2018

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Fibre reinforced concrete shows enhanced performance in statistically redundant bi-dimensional structural elements that undergo biaxial bending. However, the lack of reinforcing rebars in fibre reinforced structural elements may affect the structural ductility which may further affect the overall load bearing capacity of these structures. To investigate the influence of fibres in such elements, six concrete plates of 2000 9 2000 9 150 mm reinforced with steel fibres and/or reinforcing rebars are tested under a central concentrated load. Two of the elements are reinforced with only 35 kg/m 3 of steel fibres, two are reinforced with 2-way conventional reinforcing rebars (35 kg/m 3 , in each direction) and two are reinforced with both steel fibres and rebars. The specimens are simply supported at the middle of each side by means of a bilateral restraint; the deflection response and cracking behaviour of all the specimens are recorded and compared. Moreover, the methodology introduced in the fib Model Code 2010 for design of steel fibre reinforced concrete is implemented to predict the ultimate load bearing capacity of these elements and its reliability is determined in comparison with the experimental values. The comparison of the behaviour of the specimens reinforced only with steel fibres, with those reinforced with steel rebars, shows the higher efficiency of steel fibres in terms of load carrying capacity, but with a lower ductility. The combination of steel fibres and rebars allows for a better exploitation of the capacity of both reinforcement solutions. Finally, the reliability of the approach implemented for the ultimate load prediction is shown and the need of rebars in providing ductility in fibre reinforced concrete members is underlined.

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Section: Introductionmentioning

confidence: 99%

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

2018

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“…Steel fibre‐reinforced concrete (SFRC) is a well‐known construction material that has been used quite extensively to build industrial pavements , , harbour and airport pavements , shotcrete linings , tunnel segments –, precast sewer pipes , retaining structures , foundation slabs , slabs on piles and elevated slabs supported on columns . The use of SFRC in these structures is particularly convenient because it gains advantages from the redundancy of these structures.…”

Section: Introductionmentioning

confidence: 99%

On the reliability of the design approach for FRC structures according tofibModel Code 2010: the case of elevated slabs

Prisco

Martinelli

Parmentier

2016

Structural Concrete

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The paper focuses on the reliability of the design approach proposed in Model Code 2010 for the estimation of the ultimate capacity of fibre-reinforced concrete (FRC) elevated slabs on the basis of different tests for material characterisation. The fracture properties of the material are determined through three-point bending tests on notched beams, and through double edge wedge splitting (DEWS) tests carried out on cylinders cored in the full-size test structure. As a case study, an FRC elevated flat slab is considered, consisting of 9 bays (panels) of a 6×6 m² dimension and supported by sixteen circular concrete columns having a thickness of 0.2 m and a full-size of 18.3×18.3 m². The ultimate bearing capacity of the slab experimentally determined is compared with the design value predicted by means of a procedure based on limit Accepted Article www.ernst-und-sohn.de Even if the tests are affected by a significant standard deviation and the two experimental campaigns with 3-point bending tests give a significant difference from class "5c" to class "3e", the structural test presents a bearing capacity that is always larger than the predicted one, which considers a safety coefficient for the material γ F = 1.5.

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“…At the same time, the mixture maintains pumping consistency and self-compacting properties. Finally, it allows to obtain UWC of high strength and quality [19][20][21].…”

Section: Fly Ashmentioning

confidence: 99%

Influence of selected additives and admixtures on underwater concrete and the environment

et al. 2018

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The intensive civilization development implies searching for new possibilities connected with extension of city agglomerations, both the areas of flat building and the industrial areas. One of the most interesting solution is to use water reservoirs, rivers and sea areas. The extension of buildings affects the building materials, especially hydrotechnical concrete. Water structures are usually the objects of huge dimensions exposed to extreme conditions. In most cases these buildings are specific and complicated. They require an individual approach to concrete mix design and should be monitored by measurement technologies supported by automated numerical examinations. Nowadays health monitoring systems are applied to large variety of engineering structures. In order to get the required quality of hydrotechnical concrete, additives and admixtures are necessary. The material properties of underwater concrete can be also improved using polymer and steel fibers of various content and length. The majority of areas are built of concrete, that is the reason to be aware of admixture influence on the environment and living organisms. The attempt to evaluate the description of different kinds of hydrotechnical concrete as potential habitat of water organisms, was indicated in the paper.

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Application of steel fibre concrete for underwater concrete slabs

Cited by 17 publications

References 0 publications

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

On the reliability of the design approach for FRC structures according tofibModel Code 2010: the case of elevated slabs

Influence of selected additives and admixtures on underwater concrete and the environment

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