Developement of a Shotcrete using Glass Fibers and Construction Examples

Miyata, Shohiko; Tottori, Seiichi; Ushijima, Sakae; Minematsu, Toshikazu

doi:10.3151/coj1975.26.2_15

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2003

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“…This is because the fiber volume fraction in ECC, typically 1 to 2%, gives rise to processing problems such as fiber ball cramming in the pumping system. Sprayed materials comparable to ECC are reported with only dry mix process in literature, which involves glass fiber (Miyata et al 1988).…”

Section: Introductionmentioning

confidence: 97%

Tensile and Anti-Spalling Properties of Direct Sprayed ECC

Kanda

Saito

Sakata

2003

ACT

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The use of Engineered Cementitious Composite (ECC), which has metal-like deformation and crack opening restriction ability, as a retrofit material for structures, has been the subject of high expectations. For this application, the direct spray method has been commonly accepted. This study focused on experimentally clarifying the fundamental properties of direct sprayed ECC containing high-performance polyvinyl alcohol fibers. The experiments that were performed demonstrated that direct sprayed ECC was successfully processed and showed pseudo-strain hardening performance comparable to that of traditionally cast ECC reported in the literature. Furthermore, test results simulating concrete cover cracking due to re-bar corrosion demonstrated that direct sprayed ECC has significant potential to prolong service life of R/C members in a heavy chloride environment.

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Section: Introductionmentioning

confidence: 97%