Clad-Reinforcing Effect of Sifcon on Blast Resistance of Reinforced Concrete Slabs

Yamaguchi, Makoto; Nagato, Takeyuki; Morishima, Shintaro

doi:10.3130/aijs.82.279

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…However, subsequent studies (Yamaguchi et al 2007(Yamaguchi et al , 2008(Yamaguchi et al , 2010(Yamaguchi et al , 2012(Yamaguchi et al , 2015(Yamaguchi et al , 2017 focusing on the fracture properties of spall proved that SIFCON using steel fiber reduces spall better than other FRCCs. Furthermore, the authors developed mortar-preparation grout that can fill the narrow gaps of the fibers in SIFCON to reduce the matrix contraction as well as the environmental burden associated with SIFCON production.…”

Section: Introductionmentioning

confidence: 99%

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

Morishima

Yamaguchi

Shibuya

et al. 2020

ACT

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When designing blast-resistant concrete members that are subject to contact detonation, it is necessary to reduce the spall damage due to tensile stress waves reflected from the back sides of the members. In a previous study, the authors confirmed the good spall-reducing performance under contact detonation of slurry-infiltrated fiber concrete (SIFCON), which is manufactured by first placing fibers into an empty mold and then infiltrating them with grout. In this study, to obtain SIFCON with further improved spall reduction, experimental investigations were conducted regarding the effects of different fiber types on the blast resistance of SIFCON slabs against contact detonation. Five types of steel fibers and four types of synthetic fibers were employed as reinforcing fibers. The thickness of the SIFCON slabs was fixed at 80 mm, and contact detonation tests were conducted using two amounts of SEP explosives. All of the SIFCON samples investigated reduced the spall damage due to contact detonation more effectively than normal concrete and other conventional fiber reinforced cementitious composites. Furthermore, by using SIFCON with fine straight steel fibers, the spall-limit thickness of the slab could be reduced by 54% or more.

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Section: Introductionmentioning

confidence: 99%

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

Morishima

Yamaguchi

Shibuya

et al. 2020

ACT

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“…Mortar infiltrated fiber concrete has a very good potential for use in areas where resistance to impact and high ductility are needed especially in designing the seismic retrofit, in the structures under impact and explosive effects and repair of the structural reinforced concrete element [4]. mortar infiltrated fiber concrete exhibits better spallreducing performance than normal concrete and other fiber-reinforced [5].…”

Section: Introductionmentioning

confidence: 99%

Using Mortar Infiltrated Fiber Concrete as Repairing Materials for Flat Slabs

2020

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This search aims to study and test the effect of using a new material (mortar infiltrated fiber concrete) as repair material in crucial regions that need a special type of repair like (deck of bridges, pavements, and defense structures). This work consisted of three stages: the first stage; testing the engineering properties of slurry infiltrated fiber concrete (compressive, splitting tensile, flexural and bond strengths), by using different types of fibers (End hooked steel fiber, Micro steel fiber, Polypropylene fiber, and Synthetic fiber), in five different types of mortar infiltrated fiber concrete mixes (with a volumetric ratio of fiber 6%), and the age of test was 28 days. After studying the behavior of these mixes in these tests, the second stage of this study was concluded casting reference slab with dimensions 900×900×80 mm from normal strength concrete and repairing two sets of damaged slabs (with dimensions 900×900×50 mm, the first set consist of five slabs damaged in the compression zone, and the second set consist of five slabs damaged in tension zone), the two sets repaired with repair layer from mortar infiltrated fiber concrete with thickness 30 mm. The third stage of the study was testing the effect of the repair material (mortar infiltrated fiber concrete) on the flexural behavior of the repaired slab specimens in (flexural strength, deflection characteristics, and ductility), through using a hydraulic jack with a four-point load system. The results of testing slab specimens indicated significant improvement in the flexural behavior of the repaired slab when compared with the reference slab, the slabs repaired in the compression zone recorded increasing in range 2-39% in ultimate load and the slabs that repaired in tension zone recorded 4-71% increasing in ultimate load .also recorded better deflection values through testing the slabs specimens that repaired. The ductility of the repaired slab specimens increased significantly from 25 to 91% compared with the reference slab specimens. These results indicated excellent effect mortar infiltrated fiber concrete as a perfect repair material for slabs that damaged in compression and tension zones.

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Clad-Reinforcing Effect of Sifcon on Blast Resistance of Reinforced Concrete Slabs

Cited by 2 publications

References 4 publications

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

Using Mortar Infiltrated Fiber Concrete as Repairing Materials for Flat Slabs

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