PROCEEDINGS OF TUNNEL ENGINEERING, JSCE
Online ISSN : 1884-9091
ISSN-L : 1345-0832
Development of high performance shotcrete with high early strength
Osamu OCHIKatsumi OZAWANobuyuki YOSHIWARAAtsumu ISHIDA
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JOURNAL FREE ACCESS

2003 Volume 13 Pages 303-308

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Abstract

High performance shotcrete with high early strength, over 3 N/mm2 after 10 minutes, has been developed for improvement of safety and application of high-speed excavation. High strength additive and super self-hardening acceralator, together to form ettringite, are applied to high quality shotcrete, which is achieved by adoption of two-stage mixing, known as SEC method, and usage of silica-fume, limestone fine-powder. Both table tests and shotcrete experiments in a model tunnel are described.

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© by Japan Society of Civil Engineers
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