Alkali-silica reaction‚ÄîJapanese experience

Ono, Kohei; Kobayashi, Kazuhiko; Miyagawa, T; Kojima, Toshikatsu; Nakano, Kin-ichi; Okada, Kiyoshi; Kawamura, MZtsunori; Nishibayashi, Shinzo

doi:10.4324/9780203036631.ch10

Cited by 1 publication

(4 citation statements)

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“…Considering that the presence of cracks increases concrete permeability and water is essential for the development of ASR, it is possible to infer that the kinetics of the reaction must be related to the evolution of tensile cracking 43–45 . When RC is considered the reinforcement can exert certain restrictions on ASR expansions 46,47 . The literature reports a great decrease in strains along the longitudinal direction and deflections in real‐scale RC beams subjected to flexure compared with plain beams 46 .…”

Section: Introductionmentioning

confidence: 99%

“…The literature reports a great decrease in strains along the longitudinal direction and deflections in real‐scale RC beams subjected to flexure compared with plain beams 46 . Differences in stiffness of RC beams with and without ASR damage were also reported without effects on the ultimate load 47 . The shear behavior of RC elements damaged by the development of ASR was studied by different authors 48–52 ; some research works indicate that the shear capacity is reduced as the ASR expansion takes place 53 .…”

Section: Introductionmentioning

confidence: 99%

“…[43][44][45] When RC is considered the reinforcement can exert certain restrictions on ASR expansions. 46,47 The literature reports a great decrease in strains along the longitudinal direction and deflections in real-scale RC beams subjected to flexure compared with plain beams. 46 Differences in stiffness of RC beams with and without ASR damage were also reported without effects on the ultimate load.…”

Section: Introductionmentioning

confidence: 99%

“…46 Differences in stiffness of RC beams with and without ASR damage were also reported without effects on the ultimate load. 47 The shear behavior of RC elements damaged by the development of ASR was studied by different authors [48][49][50][51][52] ; some research works indicate that the shear capacity is reduced as the ASR expansion takes place. 53 However, there are few studies on the effect of fibers on the shear response of damaged RC 54,55 ; further studies in this area are needed.…”

Section: Introductionmentioning

confidence: 99%

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Contribution of steel fibers to the flexural and shear behavior of RC beams damaged by alkali‐silica reaction

Torrijos

Zerbino

Giaccio³

et al. 2023

Structural Concrete

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The study of damage processes in concrete and their effects on the residual properties represents a key point related to the service life of reinforced concrete (RC) structures. The use of steel fibers in RC beams mainly improves the cracking control and the shear bearing capacity. Considering the shear behavior, the presence of fibers not only leads to partial or total substitution of secondary reinforcement, but they can also result in a modification of the failure behavior from a shear failure (brittle) to a bending (ductile) one. The contribution of fibers on flexural and shear behavior of sound and damaged RC beams was investigated using alkali‐silica reaction as a damaging tool. First, the evolution of deformations and cracks were measured on creep tests of RC beams with and without fibers and reactive aggregates. Second, the flexural and shear behavior of damaged and undamaged beams incorporating steel fibers were compared. Results showed that alkali‐silica reaction damage can provoke a reduction of RC beam ductility, while the flexural strength is preserved. Regarding shear, it was observed that even in damaged concrete, fibers were able to control the crack propagation and increase the bearing capacity.

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Section: Introductionmentioning

confidence: 99%