|تعداد مشاهده مقاله||103,260,227|
|تعداد دریافت فایل اصل مقاله||81,331,124|
The Effects of Cold-Drawn Crimped-End Steel Fibers on the Mechanical and Durability of Concrete Overlay
|Civil Engineering Infrastructures Journal|
|دوره 54، شماره 2، اسفند 2021، صفحه 319-330 اصل مقاله (465.41 K)|
|نوع مقاله: Research Papers|
|شناسه دیجیتال (DOI): 10.22059/ceij.2020.297941.1657|
|Jafar Sobhani ؛ A Pourkhorshidi|
|A bonded concrete overlay consists of a new concrete overlay placed directly on top of an existing concrete pavement. The properties of such layer have a distinguished factor for reliable service-life extending of concrete pavements repairing systems. In this paper, the engineering properties of cold-drawn crimped-end steel fiber reinforced (CFCSF) concrete mixtures as overlays are evaluated. To this end, CFCSF mixtures are made with fiber contents of 15 and 25 kg/m3 with diameters of 0.8 and 1 mm and water-cement ratio of 0.5 in comparison with reference concrete. The engineering properties of these types of concrete in the properties of the fresh and the hardened concrete including Compressive Strength (CS), Tensile Strength (TS), flexural strength (FS), Modulus of Elasticity (ME), depth of Water Penetration (WP), Impact (IR) and Abrasion Resistance (AR) are investigated. The results show that at an early age, the addition of fibers had no significant effects on the CS but at higher ages, the samples containing steel fibers have higher compressive TS and FS than the control ones. Also, the use of steel fibers increases the ME, IR and AR of CFCSF specimens. Moreover, models are developed to correlate the mechanical properties of mixtures with AR and IR. The comparison between the relation of AR and IR to other mechanical properties, made of the linear regression and polynomial relationships in aspects of R2, indicates that stronger relations are available between TS with IR and AR with ME.|
|Abrasion Resistance؛ Concrete Overlay؛ Impact Resistance؛ Mechanical Properties؛ Steel Fiber|
ACI 544.2R-89. (1989). Measurement of properties of fiber reinforced concrete, American Concrete Institute.
ASTM A820/A820M. (2016). Standard specification for steel fibers for fiber-reinforced concrete, ASTM International, West Conshohocken, PA.
ASTM C150/C150M. (2019). Standard specification for Portland cement, ASTM International, West Conshohocken, PA.
ASTM C192/C192M. (2019). Standard practice for making and curing concrete test specimens in the laboratory, ASTM International, West Conshohocken, PA.
ASTM C469/C469M. (2014). Standard test method for static modulus of elasticity and Poisson's ratio of concrete in compression, ASTM International, West Conshohocken, PA.
ASTM C496/C496M. (2017). Standard test method for splitting tensile strength of cylindrical concrete specimens, ASTM International, West Conshohocken, PA.
ASTM C779/C779M. (2019). Standard test method for abrasion resistance of horizontal concrete surfaces, ASTM International, West Conshohocken, PA.
ASTM C78/C78M. (2018). Standard test method for flexural strength of concrete (using simple beam with third-point loading), ASTM International, West Conshohocken, PA.
Atis, C.D., Karahan, O., Ari, K., Sola, Ö.C. and Bilim, C. (2009). “Relation between strength properties (flexural and compressive) and abrasion resistance of fiber (steel and polypropylene) reinforced fly ash concrete”, Journal of Materials in Civil Engineering, 21, 402-408.
BS EN 12390-8. (2019). Testing hardened concrete. Depth of penetration of water under pressure, BS Standards.
Fwa, T.F. and Paramasivam, P. (1990). “Thin steel fiber cement mortar overlay for concrete pavement”, Cement and Concrete Composites, 12, 175-184.
Harrington, D. and Fick, G. (2014). “Guide to concrete overlays sustainable solutions for resurfacing and rehabilitating existing pavements”, 3rd Edition, ACPA Publication.
Isla, F. Luccioni, B. Ruano, G. Torrijos, M.C. Morea, F. Giaccio, G. and Zerbino, R. (2015). “Mechanical response of fiber reinforced concrete overlays over asphalt concrete substrate: Experimental results and numerical simulation”, Construction and Building Materials, 93, 1022-1033.
Jafarifar, N., Pilakoutas, K. and Bennett, T. (2016). “The effect of shrinkage cracks on the load bearing capacity of steel-fiber-reinforced roller-compacted-concrete pavements”, Materials and Structures, 49, 23-29.
LaHucik, J. Dahal, S. Roesler, J. and Amirkhanian, A.N. (2017). “Mechanical properties of roller-compacted concrete with macro-fibers”, Construction and Building Materials, 135, 440-446.
Madhkhan, M., Azizkhani, R. and Torki Harchegani, M.E. (2012). “Effects of pozzolans together with steel and polypropylene fibers on mechanical properties of RCC pavements”, Construction and Building Materials, 26(1), 102-112.
Neves, R.D. and Fernandes de Almeida, J.C.O. (2005). “Compressive behaviour of steel fiber reinforced concrete”, Structural Concrete, 6(1), 1-8.
Ramezani, A.R. and Esfahani, M.R. (2018). “Evaluation of hybrid fiber reinforced concrete exposed to severe environmental conditions”, Civil Engineering Infrastructures Journal, 51(1), 119-130.
Shadafza, E. and Saleh Jalali, R. (2016). “The elastic modulus of steel fiber reinforced concrete (SFRC) with random distribution of aggregate and fiber”, Civil Engineering Infrastructures Journal, 49(1), 21-32.
Song, P.S., Hwang, S. and Sheu, B.C. (2004). “Statistical evaluation for impact resistance of steel-fiber-reinforced concretes”, Magazine of Concrete Research, 56(8), 437-442.
Sukontasukkul, P., Chaisakulkiet, U., Jamsawang, P., Horpibulsuk, S., Jaturapitakkul, C. and Chindaprasirt, P. (2019). “Case investigation on application of steel fibers in roller compacted concrete pavement in Thailand”, Journal of Case Studies in Construction Materials, 11, e00271.
Tavakoli, H.R., Fallahtabar Shiadeh, M. and Parvin, M. (2016), “Mechanical behavior of self-cnthetics and steel fibers”, Civil Engineering Infrastructures Journal, 49(2), 197-213.
Zhang, M.H., Li L. and Paramasivam, P. (2004). “Flexural toughness and impact resistance of steel-fiber-reinforced lightweight concrete”, Magazine of Concrete Research, 56(5), 251-262.
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