Experimental Study of Mechanical Properties and Relationships between Strengths of Pure and Nanosilica-Steel fiber-contained Roller Compacted Concrete at Different Curing Days

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SEIFOLLAHI FARID; Mohammadi Yaghoub

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Journal Paper

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Journal: Journal of Structural and Construction Engineering Year:2022 | Volume:9 | Issue:7 Page(s): 0-0

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Title

Experimental Study of Mechanical Properties and Relationships between Strengths of Pure and Nanosilica-Steel fiber-contained Roller Compacted Concrete at Different Curing Days

Author(s)

SEIFOLLAHI FARID | Mohammadi Yaghoub

Keywords

Roller compacted concrete pavement (RCCP)

nanosilica

Steel Fibers

Mechanical properties

Strength relations

Abstract

Roller compacted concrete pavement contains conventional concrete components and has differences such as consistency, aggregate gradation, mix design and construction method. In this study, after determination of consistency by Vebe test, compressive, split tensile and flexural strengths were determined at 7, 28 and 90 curing days. Also, the relationships between different strengths were presented at different ages, which is a good match between the relationships obtained in this study and the relationships provided by ACI. Then, in order to reduce the defects of plain concrete and improve the Mechanical properties, Steel Fibers and nanosilica with volume ratios of 0. 33%, 0. 67% and 1% and weight ratios of 0. 5%, 1% and 1. 5%, respectively were added to plain RCCP and strengths at different ages were determined. The maximum increase in strengths occurred in samples containing 1% Steel Fibers and 1% nanosilica which at 28 days compressive, split tensile and flexural strengths increased by 27. 2, 94. 4 and 102. 6%, respectively. The effect of adding Steel Fibers and nanosilica on flexural strength is greater than compressive and split tensile strengths. The trend of strength change in 7-day and 90-day samples is similar to the behavior of 28-day samples. The addition of Steel Fibers and nanosilica increases the Vebe time and reduces the consistency of the mixture. nanosilica by increasing the viscosity of cement paste, reduces the release of cement paste from mortar pores during compaction and reduces the workability. By including Steel Fibers, the thickness of the pavement can be reduced, as a result, the amount and cost of materials will be reduced and the execution speed will be higher, and the dead load will be reduced, which can be important in structures such as bridges.

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APA: Copy

SEIFOLLAHI, FARID, & Mohammadi, Yaghoub. (2022). Experimental Study of Mechanical Properties and Relationships between Strengths of Pure and Nanosilica-Steel fiber-contained Roller Compacted Concrete at Different Curing Days. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, 9(7 ), 0-0. SID. https://sid.ir/paper/1033706/en

Vancouver: Copy

SEIFOLLAHI FARID, Mohammadi Yaghoub. Experimental Study of Mechanical Properties and Relationships between Strengths of Pure and Nanosilica-Steel fiber-contained Roller Compacted Concrete at Different Curing Days. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING[Internet]. 2022;9(7 ):0-0. Available from: https://sid.ir/paper/1033706/en

IEEE: Copy

FARID SEIFOLLAHI, and Yaghoub Mohammadi, “Experimental Study of Mechanical Properties and Relationships between Strengths of Pure and Nanosilica-Steel fiber-contained Roller Compacted Concrete at Different Curing Days,” JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, vol. 9, no. 7 , pp. 0–0, 2022, [Online]. Available: https://sid.ir/paper/1033706/en

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