The resistance of compressed spun concrete members reinforced by high-strength steel bars

Kudzys, Antanas; Kliukas, Romualdas

doi:10.1617/s11527-007-9255-8

Cited by 11 publications

(15 citation statements)

References 2 publications

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“…In Lithuania, the studies of physical and mechanical properties on reinforced spun concrete have been performed since 1959 at the base of the former Vilnius Civil Engineering Institute (now, Vilnius Gediminas Technical University). These studies mostly were focused on experimental and theoretical research on the supporting poles of overhead power lines and communication systems [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

2020

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The current research paper is focused on the experimental investigation of features of chemical admixtures (superplasticizers C-3, ‘Dofen’ and formaldehyde resin ACF-3M) utilizing in reinforced spun concrete structures. For the sake of comparison, the results of studying the effects of chemical admixtures on physical and mechanical properties on vibrated and spun concrete are provided. As a separate part of spun concrete products, the supporting poles of overhead power lines are introduced. The results obtained indicate, that the positive effect of chemical admixtures for spun and vibrated concrete is most pronounced at an early age of concrete. The effective amount of chemical admixtures for spun concrete is 0.15% of cement mass when formaldehyde resin ACF-3M and 1% of cement mass when superplasticizers C-3 and ‘Dofen’ are used. Moreover, the brief review about the reinforced spun concrete members is provided.

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Section: Introductionmentioning

confidence: 99%

“…As mentioned above, due to the specific method of production (centrifugation) the concrete in the rotated mold is acted upon by centrifugal forces and pressed against the mold walls. Thus, the concrete is compacted greatly and is much (1.3-1.8 times) stronger than the concrete of the same composition, compacted using other methods [13,[19][20][21].…”

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Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

2020

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“…Today even more spun-cast reinforced concrete columns are installed into high-rise buildings and other structures [4,9]. The new application field implies a change in the dominant loading type.…”

Section: Introductionmentioning

confidence: 99%

Concrete strength tendency in the wall of cylindrical spun-cast concrete elements

Völgyi¹,

Farkas²,

Nehme³

2010

Per. Pol. Civil Eng.

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The aim of the research was to characterize the concrete mixtures for spun-cast concrete and to determine the relationship between the compacting ratio and the manner of segregation. In the research 23 specimens of 9 different mixtures with low w/c ratio were tested. Investigated parameters included w/c, spinning speed, duration, and properties of the aggregate. The strength of the concrete in the outer, middle and inner region of the spun-cast element and of the vibrated cube was assessed by testing drilled cores. The optimal compacting energy caused by spinning was defined for different mixtures. Statistical regression functions depending on the parameters above were defined for the change of strength in the wall of the element.Keywords spun-cast concrete · strength · experimental test AcknowledgementThe authors wish to express their gratitude to BVM Épelem LTD, SW Umwelttechnik Hungary LTD, Railone LTD for the research materials and for sponsoring the research. Thanks to the Department of Structural Materials and Engineering Geology for their assistance in the laboratory work. Special thanks to Mr András Eipl. István VölgyiDepartment of Structural Engineering, BME, Bertalan L. u.

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“…A number of advantages with respect to economic, structural and architectural features is characteristic of prefabricated spun concrete building columns (Walochnik 1995). However, the technology advancement promotes the use of spun concrete members only for the poles of high-voltage electrical transmission lines: significant technology advances attach great importance to the strength, lightness and durability of precast spun concrete poles.…”

Section: Introductionmentioning

confidence: 99%

The Limit State Design of Spun Concrete Columns Using Load Combinations Recommended by en 1990 and Asce/Sei 7–05

Kudzys¹,

Kliukas

2009

Journal of Civil Engineering and Management

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The expediency of using precast spun concrete columns of annular cross‐sections reinforced by high‐strength steel bars is discussed. Test material properties, efficiency factors and resisting compressive stresses of plain and reinforced spun concretes are presented. Modelling a bearing capacity of eccentrically loaded members of annular cross‐sections is based on the concepts of compression with a bending moment and bending with a concentrical force. The comparison of test and modelling data of concentrically and eccentrically loaded members is analysed. The expediency to use in design practice the approaches of current methods of partial safety factors design (PSFD) legitimated in Europe and load and resistance factors design (LRFD) suggested in the USA and other countries is considered and illustrated by a numerical example. Santrauka Aptariamas didžiastiprio plieno strypais armuotų žiedinio skerspjūvio centrifuguotojo betono kolonų naudotinumas. Pateiktos armuotojo ir nearmuotojo centrifuguotojo betono medžiagų savybės, efektyvumo veiksniai ir laikomieji gniuždymo įtempiai. Ekscentriškai gniuždomų žiedinio skerspjūvio elementų laikomajai galiai modeliuoti taikomos lenkiamojo gniuždymo ir gniuždomojo lenkimo sampratos. Analizuojamas centriškai ir ekscentriškai apkrautų elementų eksperimentinių ir modeliavimo duomenų sugretinimas, nagrinėjamas Europos, JAV ir kitų šalių projektavimo praktikoje įteisintų ir paplitusių dalinių veiksnių ir apkrovų bei atsparių veiksnių metodų taikymo tikslingumas, kurį rodo skaitmeninis pavyzdys.

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The resistance of compressed spun concrete members reinforced by high-strength steel bars

Cited by 11 publications

References 2 publications

Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

Concrete strength tendency in the wall of cylindrical spun-cast concrete elements

The Limit State Design of Spun Concrete Columns Using Load Combinations Recommended by en 1990 and Asce/Sei 7–05

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