Effect of matrix strength on pullout behavior of steel fiber reinforced very-high strength concrete composites

Abu-Lebdeh, Taher; Hamoush, Sameer; Heard, William F.; Zornig, Brian

doi:10.1016/j.conbuildmat.2010.06.059

Cited by 169 publications

(61 citation statements)

References 4 publications

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“…These increases are not valid in the case of the smooth fibers. It is well known that the fiber-matrix bond strength increases by an improving in mechanical properties of cement based composites matrix [9][10][11][12][13][14][15][16]. On the other hand, pozzolanic reaction between the metakaolin and Ca(OH)2 which exists in the fiber-matrix transition zone (Fig.…”

Section: Figmentioning

confidence: 99%

“…1 The interface of steel fiber and cement based matrix Generally, it can be summarized from many researches that the pull-out behavior depends on both matrix and fiber characteristics. The mechanical properties of matrix, curing conditions, incorporation of mineral additives, and durability problems can affect the fiber-matrix bond characteristics [10][11][12][13]. Furthermore, the effect of steel fiber morphology, type and embedment length and fiber type on fiber-matrix bond characteristics has been investigated by many researchers [10][11][12][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Yalçınkaya

Beglarigale²,

Yazıcı³

2014

uujms

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SIFCON (Slurry Infiltrated Fiber Concrete) can be described as a special type of cement based composite produced with fiber volume fraction values between 5 to 30%. As a result of superior mechanical properties such as compressive, tensile, shear and flexural strengths with extraordinary toughness values, SIFCON can be used in in industrial floors, repair and reinforcement works and military applications such as anti-missile hangers. Mechanical properties of fiber reinforced cement based composites are dramatically influenced by steel fiber-matrix bond characteristics. Many parameters such as fiber type and geometry, matrix strength, curing conditions and properties of fiber-matrix interface affect the fibermatrix bond characteristics. The density of this zone can be increased with supplementary cementitious materials such as metakaolin. In this study the effect of metakaolin and end type of steel fiber on bond characteristics has been investigated. The fiber-matrix bond characteristics were determined by applying single-fiber pull-out test. Utilization of metakaolin has improved the compressive strength and fibermatrix bond characteristics. In addition, hooked-end fiber has a better performance compared to the smooth fiber.

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Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Yalçınkaya

Beglarigale²,

Yazıcı³

2014

uujms

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“…Several other researchers from NC A&T State University James et al (2011); Ellie et al (2011); Abu-Lebdeh et al (2010a;2010b); Fini and Abu-Lebdeh (2011) and Hamoush et al (2011) and other governmental and academia agencies investigated several green materials technologies that reduce environmental effects and use recycled materials in infrastructures applications. The researchers developed several green material technology programs which maintain or improve current practices in construction engineering and ensures green products or methods arising from these programs that would be cost effective and would confer benefits on society, the economy and the environment.…”

Section: Ajeasmentioning

confidence: 99%

Thermal Conductivity of Rubberized Gypsum Board

Abu-Lebdeh¹,

Fini²,

Fadiel³

2014

American Journal of Engineering and Applied Sciences

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The disposal of scrap tires is a challenging task and hence an innovative solution to meet these challenges is needed. Extensive work has been done on the utilization of waste tires in a variety of applications in asphalt pavements and concrete. However, previous investigations focus only on the mechanical properties of the rubberized materials, but few on the thermal performance. This is especially true for rubberized gypsum. Limited or no experimental data on the thermal performance of rubberized gypsum board are available. In this study, an experimental program is established to investigate the effect of amount and size of crumb rubber on the thermal properties of gypsum materials. Gypsum is replaced by four different percentage of crumb rubber: 10, 20, 30 and 40% by weight of gypsum and two sizes of crumb rubber (#30, #10_20) to make eight rubberized gypsum specimens. The prepared specimens were tested for thermal conductivity using an apparatus specially designed and constructed for this purpose. The experimental program was concluded by proposing an empirical equation to predict the thermal conductivity of rubberized gypsum board. Results indicated better thermal performance of the gypsum board due to the addition of crumb rubber. Thermal conductivity of the rubberized gypsum was 18-38% lower than the ordinary gypsum. It is concluded that thermal conductivity of rubberized gypsum decreases with the increase of crumb rubber regardless the size of the rubber and that thermal conductivity of mixtures contained 40% of rubber was about 38% lower than conventional mixture when crumb rubber #10_20 was added, while the thermal conductivity reduced by 22% when crumb rubber #30 was added. The study suggested for future work to investigate the effect of air voids size and ratio on the thermal conductivity of rubberized gypsum.

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“…Moreover, the mechanical interlock provided by fibre hook not only increases resistance to pull-out but also has significant effect on the whole tensile behaviour of SFRCCs [19]. To investigate the influence of fibre geometry on pull-out behaviour of SFRCCs, extensive pull-out tests have been done during the last three decades [20][21][22]. However, all single fibre pull-out tests have been conducted on hooked end fibres with two curvatures or hinges.…”

Section: Introductionmentioning

confidence: 99%

Anchorage mechanisms of novel geometrical hooked-end steel fibres

Abdallah

Fan

2017

Mater Struct

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This study is aimed at fully understanding the anchorage mechanisms of steel fibres with novel hook geometries, e.g. 4DH and 5DH fibres, which were subjected to pull-out loading. The fibres were also embedded in four different matrixes with a compressive strength ranging from 33 to 148 MPa. The results showed that the anchorage and pull out behaviour was not only dependent on the geometry of the hooked end of steel fibres, but also closely related to the characteristics of matrix. Both maximum pullout load and total pull-out work of 5DH fibre were considerably higher than those of 4DH and the controlled 3DH fibres for all matrixes. All fibres embedded in normal strength concrete and medium strength concrete matrixes were completely pulled out without the occurrence of full deformation and straightening of the hook, while the controlled 3DH and 4DH fibres ruptured at hook portion when embedded in ultra-high performance mortar matrix. To fully utilize the high mechanical anchorage, 5DH fibres should be used for reinforcing high or ultra-high performance matrixes in practice.

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Effect of matrix strength on pullout behavior of steel fiber reinforced very-high strength concrete composites

Cited by 169 publications

References 4 publications

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Thermal Conductivity of Rubberized Gypsum Board

Anchorage mechanisms of novel geometrical hooked-end steel fibres

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