Gotowe bibliografie tematyczne / Reinforcement in concrete

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Gotowa bibliografia na temat „Reinforcement in concrete”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 5 lutego 2022

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Artykuły w czasopismach na temat "Reinforcement in concrete"

Hollý, Ivan. "Experimental Investigation of Bond between GFRP Reinforcement and Concrete". Solid State Phenomena 309 (sierpień 2020): 140–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.309.140.

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The reinforcing steel embedded in concrete is generally protected against corrosion by the high alkalinity (pH = 12.5 to 13.5) of the concrete pore solution. The structural degradation of concrete structures due to reinforcement’s corrosion has an impact on the safety, serviceability and durability of the structure. The corrosion of reinforcements in the construction of a transport infrastructure (especially bridges), parking areas, etc., is primarily initiated by chlorides from de-icing salts. Glass fiber reinforcement polymer (GFRP) bars are suitable alternatives to steel bars in reinforced concrete applications. The bond between concrete and reinforcement is one of the basic requirements for the composite action of both materials. The transfer of forces between the steel reinforcement and the concrete is provided by the following mechanisms: adhesion, friction and mechanical interlocking. The bond between GFRP reinforcement and concrete is different and it is ensured by friction and mechanical interlocking of the rebar surface. The chemical bond does not originate between GFRP reinforcement and the surrounding concrete, so adhesion does not contribute to transfer of the bond forces. Some few test methods are used to determine the bond between GFRP reinforcement and concrete. The pull-out tests were used to determine the bond behavior between GFRP rebars and concrete. This paper describes the preparation, process, results and evaluation of the pull-out tests.

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Hollý, Ivan, i Juraj Bilčík. "Effect of Chloride-Induced Steel Corrosion on Working Life of Concrete Structures". Solid State Phenomena 272 (luty 2018): 226–31. http://dx.doi.org/10.4028/www.scientific.net/ssp.272.226.

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The reinforcing steel embedded in concrete is generally protected against corrosion by the high alkalinity (pH = 12.5 to 13.5) of the concrete pore solution. The structural degradation of concrete structures due to reinforcement’s corrosion has an impact on the safety, serviceability and durability of the structure. The corrosion of reinforcements in the construction of a transport infrastructure (especially bridges), parking areas, etc., is primarily initiated by chlorides from de-icing salts. When corrosion is initiated, active corrosion results in a volumetric expansion of the corrosion products around the reinforcing bars against the surrounding concrete. Reinforcement corrosion causes a volume increase due to the oxidation of metallic iron, which is mainly responsible for exerting the expansive radial pressure at the steel–concrete interface and development of hoop tensile stresses in the surrounding concrete. When this tensile stress exceeds the tensile strength of the concrete, cracks are generated. Higher corrosion rates can lead to the cracking and spalling of the concrete cover. Continued corrosion of reinforcement causes a reduction of total loss of bond between concrete and reinforcement.

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Kliukas, Romualdas, Ona Lukoševičienė, Arūnas Jaras i Bronius Jonaitis. "The Mechanical Properties of Centrifuged Concrete in Reinforced Concrete Structures". Applied Sciences 10, nr 10 (21.05.2020): 3570. http://dx.doi.org/10.3390/app10103570.

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This article explores the influence of transverse reinforcement (spiral) and high-strength longitudinal reinforcements on the physical-mechanical properties of centrifuged annular cross-section elements of concrete. The test results of almost 200 reinforced, and over 100 control elements are summarizing in this article. The longitudinal reinforcement ratio of samples produced in the laboratory and factory varied from 1.0% to 6.0%; the transverse reinforcement ratio varied from 0.25% to 1.25%; the pitch of spirals varied from 100 mm to 40 mm and the concrete strength varied from 25 MPa to 60 MPa. Experimental relationships of coefficients for concrete strength, moduli of elasticity and limits of the longitudinal strain of centrifuged concrete in reinforced concrete structures in short-term concentrically compression were proposed.

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Vlach, Tomáš, Magdaléna Novotná, Ctislav Fiala, Lenka Laiblová i Petr Hájek. "Cohesion of Composite Reinforcement Produced from Rovings with High Performance Concrete". Applied Mechanics and Materials 732 (luty 2015): 397–402. http://dx.doi.org/10.4028/www.scientific.net/amm.732.397.

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The reinforcement of concrete with composite technical textile creates a tensile load-bearing capacity. It allows the elimination of steel reinforcement and minimisation of concrete cover. Based on this, the concrete cover is designed with respect to the cohesion of reinforcement with concrete. By using of textile reinforcement very thin structures could be created. The aim of this paper was to determine the interaction conditions of carbon and basalt composite reinforcement in a matrix of epoxy resin with high performance concrete (HPC). The tensile strength of used composite reinforcement and the other mechanical parameters of HPC were determined by experimental tests. Experiments copied the production method of technical textiles. These two combinations of materials present the influence on the design of the structures with textile reinforcements.

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Zhang, Shuang, Hai Jun Wu, Zheng Jun Tan i Feng Lei Huang. "Theoretical Analysis of Dynamic Spherical Cavity Expansion in Reinforced Concretes". Key Engineering Materials 715 (wrzesień 2016): 222–27. http://dx.doi.org/10.4028/www.scientific.net/kem.715.222.

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This paper aims to establish a model that considers the penetration resistance caused by the constraint effects of steel reinforcements on concrete. Firstly, based on the experiment phenomena that reinforcements increase the toughness and tensile strength of concretes, the fitting relational expression between toughness of reinforced concrete and ratio of reinforcement was used to improve the Griffith yield criterion for reinforced concrete. Then, the dynamic spherical cavity expansion analysis was developed using the improved Griffith yield criterion as constitutive model and the dilation equation as equation of state, and the response regions were consisted of six distinct zones: cavity, compaction zone, dilation zone, radially cracked zone, elastic zone and undisturbed zone. This dynamic analysis considered the compression and dilation of concretes at the same time and was applicable to the penetration problem of reinforced concrete target. At last, based on the theoretical model of this paper, the experiments of projectiles with different weights penetrating into reinforced concrete targets with different reinforcement ratios were calculated using penetration analysis method of rigid projectiles. The comparison results showed that the theoretical analysis model of this paper can be used to predict the depth of penetration and other physical parameters such as velocity and deceleration with certain rationality.

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Bilčík, Juraj, i Ivan Hollý. "Experimental Analysis of Reinforcement Corrosion on Bond Behaviour". Advanced Materials Research 1106 (czerwiec 2015): 140–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1106.140.

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The corrosion of reinforcement is the major cause of damage of reinforced concrete structures. This has an impact on safety, serviceability and durability of the structure. The corrosion of steel in concrete reduces the cross sectional area of the reinforcement and decreases the bond between reinforcement and concrete. Corrosion products have a higher volume than steel, which produces internal stresses that lead to the cracking and spalling of the concrete cover. The paper analyses the effect of the chloride-initiated corrosion of reinforcements on bond behaviour.

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Rezaei, Mehdi, Siti Aminah Osman i Nandivaram E. Shanmugam. "PRIMARY AND SECONDARY REINFORCEMENTS IN REINFORCED CONCRETE CORBELS". Journal of Civil Engineering and Management 19, nr 6 (24.10.2013): 836–45. http://dx.doi.org/10.3846/13923730.2013.801896.

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The study is concerned with normal-strength concrete corbels. 30 such corbels were studied by finite element modelling and the variables considered include ratios of primary and secondary reinforcement, type of applied loading, vertical or horizontal. Finite element modelling with a software package LUSAS was used to analyse four series of corbels namely PV series (primary reinforcement with vertical loading), SV series (secondary reinforcement with vertical loading), PH series (primary reinforcement with horizontal loading) and SH series (secondary reinforcement with horizontal loading). The results indicate that corbels with neither primary reinforcement nor secondary reinforcement fail suddenly. In the case of PV series and SV series, corbels increase in ratio of primary and secondary reinforcement generally resulted in enhancement of strength and ductility when subjected to only vertical loading. This increase is significant up to 0.4% in the case of primary reinforcement and 0.3% in the case of secondary reinforcements. No noticeable change in ultimate load or ductility was observed for corbels in PH series and SH series.

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Zhou, Jun Long, Zhong Wen Ou, Qiao Chen i Yun Chen. "The Influence of Admixtures on the Corrosion Protection Afforded Steel Reinforcement in Seawater-and-Seasand Concrete". Advanced Materials Research 250-253 (maj 2011): 81–89. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.81.

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It is inevitable for steel reinforcement to be corroded when mixed with seawater-and-seasand concrete. In order to improve steel corrosion protection properties of seawater-and-seasand concrete, reduce the chloride ion’s attack on steel reinforcement in structural concrete and lengthen the steel reinforcement’s service time, this paper presents an experimental study on whether admixtures like fly ash, slag and metakaolin in the seawater-and-seasand could retard the corrosion to steel reinforcement and provide protection to steel reinforcement in seawater-and-seasand concrete. The results indicated that metakaolin had a significant anti-corrosion effect and greatly enhanced the steel corrosion protection properties of seawater-and-seasand concrete whereas both fly ash and slag did not appear to have any obvious influence on curbing the corrosion of steel reinforcement.

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Kim, Joung Rae, Hyo-Gyoung Kwak, Byung-Suk Kim, Yangsu Kwon i El Mahdi Bouhjiti. "Finite element analyses and design of post-tensioned anchorage zone in ultra-high-performance concrete beams". Advances in Structural Engineering 22, nr 2 (20.07.2018): 323–36. http://dx.doi.org/10.1177/1369433218787727.

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This article presents analyses and the design of a post-tensioned anchorage zone made of ultra-high-performance concretes with three-dimensional finite element analyses. The structural behavior was investigated through the failure modes and cracking patterns to show the anchorage zone resistance enhancement with an increase of the strength in concrete. Since the anchorage failure is usually initiated from the local zone in the case of ultra-high-performance concrete beams that have compressive strength of more than 80 MPa, the placement of reinforcements can effectively be used to enhance the strength and ductility for the local zone. However, ultra-high-performance concrete requires a smaller amount of reinforcement than normal-strength concrete. Parametric analyses are carried out to show the effect of the spiral reinforcement on the strength of the anchorage zone, and comparison with the design guidelines in NCHRP Report 356 is made. Finally, improved guidelines are suggested to cover the design of ultra-high-performance concrete.

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Křížová, Klára, i Petr Novosad. "Verification of Rheological Properties of Self-Compacting Concrete with Reinforcement". Solid State Phenomena 249 (kwiecień 2016): 41–45. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.41.

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The paper presents results of mechanical and physical tests of self-compacting concrete with fibre reinforcement. Self-compacting concretes belong to special types of concretes with filling ability without invoking external dynamic forces. Especially high storage rate and concrete access even in densely stored reinforcement, high homogenisation, low water-cement ratio and exclusion of external vibrations are benefits of SCC concretes. The highest risks that must be considered when designing this type of the concretes are their resistance to segregation, sedimentation, blocking and bleeding. Several SCC formulas with two types of fibres (steel, polypropylene) were designed and compared and the effects of fibres reinforcement on concrete selected properties were monitored in fresh and hardened condition, too.

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Rozprawy doktorskie na temat "Reinforcement in concrete"

Ward-Waller, Elizabeth 1982. "Corrosion resistance of concrete reinforcement". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/31125.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2005.
"June 2005."
Includes bibliographical references (leaves 39-40).
The objective of this thesis is to investigate the mechanism of corrosion of steel reinforcement in concrete and epoxy coated reinforcing bars as corrosion resistant alternatives. Several case studies explore the durability and deterioration issues for epoxy-coated bars discovered through 30 years of implementation in reinforced concrete structures. The methods for predicting the end of functional service life for structures reinforced with uncoated reinforcing bars and with epoxy-coated reinforcing bars are detailed and tested in a design problem in the final section of this report.
by Elizabeth Ward-Waller.
M.Eng.

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Kravaev, Plamen, Steffen Janetzko, Thomas Gries, Bong-Gu Kang, Wolfgang Brameshuber, Maike Zell i Josef Hegger. "Commingling Yarns for Reinforcement of Concrete". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1244040840310-74290.

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Textile reinforced concrete (TRC) is an innovative composite material, which is being intensely and practice-oriented investigated on national and international level. In the last few years this material has gained increasing importance in the field of civil engineering. In the context of the collaborative research project SFB 532 at the RWTH Aachen University, research was carried out to understand and to predict the behaviour of different yarn structures in fine grained concrete. Based on the results, innovative commingling yarns were made of alkali-resistant glass fibres and water soluble PVA. These hybrid yarns have an open structure, which improves the penetration of the textile reinforcement by the concrete matrix. Hence, the load bearing capacity of TRC structural elements was significantly improved. This paper presents a technique for the production of such commingling yarns for concrete applications. The mechanical properties of the new yarns are determined due to tensile stress tests. The bond behaviour of the commingling yarns was investigated by pull-out- and tensile stress tests on TRC-specimens. The results of the different tests are being presented and briefly discussed.

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Thomas, Jeff Scott. "Plastic fiber rolling for concrete reinforcement". Diss., Rolla, Mo. : University of Missouri-Rolla, 1996. http://scholarsmine.mst.edu/thesis/pdf/Thomas_09007dcc805b0f25.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 1996.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 24, 2008) Includes bibliographical references (p. 117-118).

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Sigman, Jonathan Joshua. "Behavior of concrete with composite reinforcement". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43375.

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QUINTANA, CONSUELO BELLO. "INFLUENCE OF TRANSVERSE REINFORCEMENT AND OF CONCRETE COVER OF LONGITUDINAL REINFORCEMENT ON THE ULTIMATE STRENGTH OF CONCRETE COLUMNS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7986@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Neste trabalho é feito o estudo da influência do cobrimento da armadura longitudinal e dos grampos suplementares na resistência de pilares de concreto submetidos à compressão excêntrica. Para este fim foram ensaiados pilares curtos, com armadura longitudinal contínua e pilares com emenda na armadura. Foi elaborado um modelo para o cálculo da distribuição da tensão normal e da tensão de aderência nas barras de emendas comprimidas que reproduziu bem o verificado experimentalmente. Mostra-se a importância da tensão de ponta na transmissão de forças na emenda. Se alerta sobre como a técnica normalmente empregada no reparo dos pilares onde as armaduras apresentam corrosão, que consiste na retirada parcial ou total do que restou do cobrimento para o tratamento e/ou substituição da armadura, e posterior reposição da camada de cobrimento, pode levar a ruptura do elemento por perda de aderência. Mostra-se como não colocar os grampos suplementares pode levar a perda da estabilidade do elemento.
In this work, the influence of the longitudinal reinforcement cover and supplementary transversal reinforcement on the ultimate strength of the concrete columns under eccentric compression is studied. For this purpose, tests on short columns with continuum and lapped spliced bars were carried out. A theoretical model for the calculation of the stress and bond distributions on the splice length is proposed and tested with the experimental data of this work, showing a good agreement. The relevance of the end bearing effect on the transmission of the forces in the splice is shown. An alert again the usual technique used to repair the corroded bars inside the column, i.e., to remove partially or totally the remaining concrete cover to treat or substitute the damaged reinforcement bars, and lately to put back the concrete cover. This technique may provide the element failure by the lost of bond between the remaining concrete surface and reinforcement bars. It is shown how the absence of supplementary transversal reinforcement can lead to the instability of column.

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McLeod, Robert G. "Minimum reinforcement for high-performance concrete slabs". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/MQ31397.pdf.

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Gowripalan, N. "Reinforcement of concrete elements with modified polymers". Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378032.

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Yang, Yuanzhang. "Novel reinforcement for flexibly-formed concrete structures". Thesis, University of Bath, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.767581.

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Concrete is the most widely used artificial material around the world, the productionof which is associated with over 5% of total carbon emissions. Conventional concrete structures have prismatic geometries partly due to rigid formworks, resulting in inefficient use of materials. Fabric formwork has been used to enable structural optimisation, capitalising on the flexibility of woven fabrics and unique fluidity of wet concrete. However, a significant drawback is the complexity of fabricating steel reinforcement cages for flexibly formed concrete elements, which normally have variable-depth geometries. Both curving flexural reinforcement into the designed profiles and producing shear links of variable dimensions requires additional costs of time and labour. In this dissertation, a new reinforcing system, Wound-Fibre-Reinforced Polymer (W-FRP), is proposed as a durable alternative for the reinforcement of flexibly formed concrete beams, thereby unlocking the potential to minimise carbon emissions associated with concrete construction. An automated method has been developed to produce W-FRP cages, which are light-weight, easily transported and adaptable to many beam geometries created using fabric formwork. Based on the design and optimisation process developedin this research, three series of structural testing were undertaken to investigate the structural behaviour of W-FRP reinforced concrete beams with both prismatic and variable-depth geometries. Modelling and parametric analysis are undertaken to achieve the optimum design of fabric formed T beams reinforced with W-FRP. Through testing and analysis, further practical guidance is provided for designers. The experimental and theoretical research in this thesis has shown the great effectiveness and constructability of the W-FRP reinforcing system, with which up to 23% concrete saving can be achieved without compromising structural performance. The geometry, W-FRP shear reinforcement, and anchorage design have been shown as the key factors influencing the structural behaviour of W-FRP reinforced beams. It is possible to optimise the W-FRP patterns to achieve up to 50% increase in shear performance without additional reinforcement use. Capitalising on flexible fabric formwork and W-FRP shear reinforcement, this thesis demonstrates that constructing more durable and sustainable concrete structures can be achieved in a feasible and practical manner.

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Shapiro, Nathan. "Optimal fiber yield strength for concrete reinforcement". Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/38044.

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Yu, Jianru. "Stress transfer between FRP reinforcement and concrete". Thesis, University of Bristol, 2007. http://hdl.handle.net/1983/e1707871-89d2-48be-8633-4468d3e82bc1.

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This thesis investigates gaps in the current understanding of some key aspects of Fibre Reinforced Polymer (FRP) strengthened reinforced concrete (RC) members. There are four important issues have been investigated. Firstly, a novel pullout test was developed to investigate the stress transfer mechanics and failure modes of near surface mounted (NSM) FRP strengthened RC blocks at a fundamental level. Secondly, the (FEA) was used to gain a detailed understanding of stress distribution both along the bond line and through the thickness of the adhesive layer for the RC members strengthened either by NSM or externally bonded plate (EBP) FRP technique.

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Książki na temat "Reinforcement in concrete"

Concretes with dispersed reinforcement. Rotterdam: A.A. Balkema, 1995.

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International Symposium on Corrosion of Reinforcement in Concrete Construction (3rd 1990 Wishaw, England). Corrosion of reinforcement in concrete. London: Published for the Society of Chemical Industry by Elsevier Applied Science, 1990.

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ACI Committee 421. Guide to shear reinforcement for slabs. Farmington Hills, Mich: American Concrete Institute, 2008.

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Holmberg, Åke. Force transfoer from cracking concrete to reinforcement. Stockholm: Swedish Council for Building Research, 1989.

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Mindess, Sidney. Developments in the formulation and reinforcement of concrete. Cambridge, England: Woodhead Publishing, 2008.

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Sherwood, L. S. The corrosion of steel reinforcement in concrete. Manchester: UMIST, 1989.

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Berkeley, K. G. C. Cathodic protection of reinforcement steel in concrete. London: Butterworths, 1990.

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Ballast, David Kent. Glass fiber reinforcement in building materials. Monticello, Ill., USA: Vance Bibliographies, 1988.

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Vesikari, Erkki. Service life of concrete structures with regard to corrosion of reinforcement. Espoo, Finland: Valtion teknillinen tutkimuskeskus, 1988.

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Yoichi, Yoshida. Shear reinforcement for large lightly reinforced concrete members. Ottawa: National Library of Canada, 2000.

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Części książek na temat "Reinforcement in concrete"

Hall, Stephen J. "Concrete reinforcement". W ICE Pocket Guide to Steels in the Built Environment, 129–32. London: ICE Publishing, 2021. http://dx.doi.org/10.1680/icepgsbe.65741.129.

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Izrailovich, Bronstein Vadim, Vainberg Alexander Isaakovich, Gaziev Erast Grigorievich, Landau Yuri Alexandrovich, Mgalobelov Yuri Borisovich i Ju B. Mgalobelov. "Concrete and reinforcement". W Concrete Gravity and Arch Dams on Rock Foundation, 193–208. Boca Raton : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/b22629-6.

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Bos, Freek P., Zeeshan Y. Ahmed, Rob J. M. Wolfs i Theo A. M. Salet. "3D Printing Concrete with Reinforcement". W High Tech Concrete: Where Technology and Engineering Meet, 2484–93. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_283.

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Woodson, R. Dodge. "Reinforcement". W Concrete Portable Handbook, 47–52. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-382176-8.00006-5.

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"reinforcement". W Tailor Made Concrete Structures, 161–64. CRC Press, 2008. http://dx.doi.org/10.1201/9781439828410-40.

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Glass, G. K. "Reinforcement corrosion". W Advanced Concrete Technology, 1–27. Elsevier, 2003. http://dx.doi.org/10.1016/b978-075065686-3/50256-1.

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Levitt, M. "Reinforcement, prestressing, hardware". W Precast Concrete, 48–64. CRC Press, 2014. http://dx.doi.org/10.1201/9781482264791-3.

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Mindess, S. "Fibrous concrete reinforcement". W Developments in the Formulation and Reinforcement of Concrete. CRC Press, 2008. http://dx.doi.org/10.1201/9781439832707.ch7.

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Mindess, S. "Fibrous concrete reinforcement". W Developments in the Formulation and Reinforcement of Concrete, 154–66. Elsevier, 2008. http://dx.doi.org/10.1533/9781845694685.154.

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"SHEAR REINFORCEMENT." W Reinforced Concrete: Standardized Tables, 14–20. Thomas Telford Publishing, 2011. http://dx.doi.org/10.1680/rcst.51904.0003.

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Streszczenia konferencji na temat "Reinforcement in concrete"

Šavija, Branko, Mladena Luković, José Pacheco i Erik Schlangen. "Cracking of SHCC due to reinforcement corrosion". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.118.

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Abdellatef, Mohammed, Elsayed Salem, David Lau, Lauren Stenroos i Mohammed Alnaggar. "Bond degradation of corroded reinforcement: an experimental and numerical study". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.048.

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Sola, Emiliano, Josko Ožbolt i Gojko Balabanić. "Modelling Corrosion of Steel Reinforcement in Concrete: Natural vs. Accelerated Corrosion". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.097.

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Ozbolt, J. "Modeling corrosion of steel reinforcement in concrete: natural vs. accelerated corrosion". W 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.233654.

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Nguyen, Wilson, Gabriel Jen, Jacob F. Duncan i Claudia P. Ostertag. "Effect of hybrid fiber reinforcement on corrosion-induced damage of reinforced concrete". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.181.

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Vasiliev, Alexandr, i Svetlana Daškevič. "ASSESSMENT OF THE DEPTH AND RATE OF CORROSION IN STEEL REINFORCEMENT OF REINFORCED CONCRETE CULVERTS". W 11th International Conference “Environmental Engineering”. VGTU Technika, 2020. http://dx.doi.org/10.3846/enviro.2020.831.

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Based on the results of many research years on concrete carbonisation: both immediately after manufacture (using heat-moisture treatment) and in reinforced concrete elements operated for the periods of various length (in an open atmosphere); the effect of carbonisation on the change in the protective properties of concrete in relation to steel reinforcement; for determination of the dependence of the corrosion state of steel reinforcement on the degree of concrete carbonisation in the area of steel reinforcement; the obtained regression dependences of the change (by time in the cross section) of the degree of concrete carbonisation of various classes in strength, – the analysis of the time of the onset of the boundary values of the degrees of concrete carbonisation (strength classes C12/15–C30/37) for the operating conditions of the open atmosphere was performed. Based on it, the regression dependences of the time variation of the depth of corrosion damage of steel reinforcement were construed (for fixed thicknesses of the concrete protective layer). The obtained nature of dependences made it possible to offer, in a general form, the regression dependences of the depth of corrosion damage and corrosion rate of steel reinforcement for concretes (strength classes C12/15–C30/37) for operating conditions in open atmosphere.

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Peterman, Robert J., Naga Narendra B. Bodapati, B. Terry Beck i Chih-Hang John Wu. "Long-Term End-Slip Measurements and Corresponding Transfer Lengths in Pretensioned Concrete Railroad Ties Fabricated With 15 Different Reinforcements". W 2015 Joint Rail Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/jrc2015-5678.

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Fifteen different reinforcements that are widely employed in manufacturing of railroad ties worldwide were selected for the study presented in this paper. Selected reinforcements include; 12 number of 5.32 mm diameter wires, two 3/8-inch diameter 7 wire strands, and one 5/16-inch diameter 3 wire strand. Twelve wire reinforcements are differed by surface indent geometries with one wire being smooth surfaced profile. Strand reinforcements consisted one smooth and one indented 7 wire strand, and one smooth 3 wire strand. All reinforcements were stored in low-humidity environment to avoid rust. Later, pre-tensioned concrete railroad ties were fabricated at a tie manufacturing plant with the selected 15 different reinforcements in January 2013. Same concrete mix proportions were used during the fabrication of the ties with these 15 reinforcement types. Reinforcement end-slips were measured for each concrete tie at every reinforcement location during August 2014 (after one and half years). Simultaneously, transfer length measurements were measured on all these ties through surface strain measurements. Detailed analysis of the measured end-slips for the ties fabricated with 15 reinforcements is presented. This analysis includes the variation of end-slip measurements at different locations in the cross-section. Variation in end-slip measurements for different types of reinforcements is also discussed. Transfer lengths are compared with end slip measurements and an equation to predict transfer lengths from long term end-slip values is presented.

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Sciegaj, A. "On the micro-to-macro transition of reinforcement slip in two-scale modelling". W 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.235337.

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Sharma, Akanshu, Rolf Eligehausen i Jörg Asmus. "Experimental investigations on concrete edge failure of multiple row anchorages with supplementary reinforcement". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.100.

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Sharma, Akanshu, Rolf Eligehausen i Jörg Asmus. "Analytical model for concrete edge failure of multiple row anchorages with supplementary reinforcement". W 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.101.

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Raporty organizacyjne na temat "Reinforcement in concrete"

Barna, Lynette A., Jr Smith, Bernier Charles E., Smart Andrew, Scholz Aaron i Ann M. Assessment of Asphalt Concrete Reinforcement Grid in Flexible Pavements. Fort Belvoir, VA: Defense Technical Information Center, maj 2016. http://dx.doi.org/10.21236/ada631961.

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Ramirez, J., i Gerardo Aguilar. Shear Reinforcement Requirements for High-Strength Concrete Bridge Girders. West Lafayette, IN: Purdue University, 2005. http://dx.doi.org/10.5703/1288284313393.

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Graybeal, Benjamin, i Stephen Pessiki. Confinement Effectiveness of High Strength Spiral Reinforcement in Prestressed Concrete Piles. Precast/Prestressed Concrete Institute, 1998. http://dx.doi.org/10.15554/pci.rr.seis-019.

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Frosch, Robert, Christopher Mosley i Ahmet Tureyen. Performance-Related Specifications for Concrete Bridge Superstructures, Volume 3: Nonmetallic Reinforcement. West Lafayette, IN: Purdue University, 2002. http://dx.doi.org/10.5703/1288284313291.

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Mariano Velez. High-Strength / High Alkaline Resistant Fe-Phosphate Glass Fibers as Concrete Reinforcement. Office of Scientific and Technical Information (OSTI), marzec 2008. http://dx.doi.org/10.2172/926221.

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Ragalwar, Ketan, William Heard, Brett Williams, Dhanendra Kumar i Ravi Ranade. On enhancing the mechanical behavior of ultra-high performance concrete through multi-scale fiber reinforcement. Engineer Research and Development Center (U.S.), wrzesień 2021. http://dx.doi.org/10.21079/11681/41940.

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Steel fibers are typically used in ultra-high performance concretes (UHPC) to impart flexural ductility and increase fracture toughness. However, the mechanical properties of the steel fibers are underutilized in UHPC, as evidenced by the fact that most of the steel fibers pull out of a UHPC matrix largely undamaged during tensile or flexural tests. This research aims to improve the bond between steel fibers and a UHPC matrix by using steel wool. The underlying mechanism for fiber-matrix bond improvement is the reinforcement of the matrix tunnel, surrounding the steel fibers, by steel wool. Single fiber pullout tests were performed to quantify the effect of steel wool content in UHPC on the fiber-matrix bond. Microscopic observations of pulled-out fibers were used to investigate the fiber-matrix interface. Compared to the control UHPC mixture with no steel wool, significant improvement in the flexural behavior was observed in the UHPC mixtures with steel wool. Thus, the addition of steel wool in steel fiber-reinforced UHPC provides multi-scale reinforcement that leads to significant improvement in fiber-matrix bond and mechanical properties of UHPC.

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Fanous, Ann-Marie, Sri Sritharan, Muhannad Suleiman, Jinwei Huang i Arul K. Arulmoli. Minimum Spiral Reinforcement Requirements and Lateral Displacement Limits for Prestressed Concrete Piles in High Seismic Regions. Precast/Prestressed Concrete Institute, 2010. http://dx.doi.org/10.15554/pci.rr.seis-003.

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Yosefani, Anas. Flexural Strength, Ductility, and Serviceability of Beams that Contain High-Strength Steel Reinforcement and High-Grade Concrete. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.6286.

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Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski i Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), maj 2021. http://dx.doi.org/10.21079/11681/40683.

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A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.

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Rahman, Mohammad, Ahmed Ibrahim i Riyadh Hindi. Bridge Decks: Mitigation of Cracking and Increased Durability—Phase III. Illinois Center for Transportation, grudzień 2020. http://dx.doi.org/10.36501/0197-9191/20-022.

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Early-age cracking in concrete decks significantly reduces the service life of bridges. This report discusses the application of various concrete mixtures that include potential early mitigation ingredients. Large-scale (7 ft × 10 ft) experimental bridge prototypes with similar restraint conditions found in actual bridges were poured with different concrete mixtures to investigate mitigation techniques. Portland cement (control), expansive Type K cement, internally cured lightweight aggregate (LWA), shrinkage-reducing admixture (SRA), and gypsum mineral were investigated as mitigating ingredients. Seven concrete mixtures were prepared by using individual ingredients as well as a combination of different ingredients. The idea behind combining different mitigating techniques was to accumulate the combined benefit from individual mitigating materials. The combined Type K cement and LWA mixture showed higher concrete expansion compared with mixtures containing Portland cement, Type K cement, LWA, and SRA in the large-scale experimental deck. Extra water provided by LWA significantly enhanced the performance of Type K cement’s initial expansion as well as caused larger total shrinkage over the drying period. A combination of Type K cement and gypsum mineral showed insignificantly higher expansion compared with the individual Type K mixture. Overall, the experimental deck containing SRA showed the least total shrinkage compared with other mixtures. Finite-element modeling was performed to evaluate and predict concrete stress-strain behavior due to shrinkage in typical bridges. A parametric study using finite-element analysis was conducted by altering the structure of the experimental deck. More restraint from internal reinforcement, less girder spacing, larger girder flange width, and more restrictive support conditions increased the concrete tensile stress and led to potential cracking in the concrete deck.

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