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CONCRETE LIBRARY OF JSCE NO. 31, JUNE 1998

 

RECOMMENDATIONS FOR DESIGN AND CONSTRUCTION OF CONCRETE STRUCTURES USING SILICA FUME IN CONCRETE

- DRAFT -

 

 (Translation from the CONCRETE LIBRARY No.80 published by JSCE, March 1995)

 

JSCE Research Subcommittee on Silica Fume in Concrete

 

Chairman of Committee on Concrete of JSCE

Shigeyoshi NAGATAKI

Chairman of JSCE Research Subcommittee

Taketo UOMOTO

 

Members

Syoichi INOUE

Junichiro NIWA

Nobuaki OTSUKI

Tsutomu FUKUTE

Koji SAKAI

Nobuaki TAKAGI

Hidetaka UMEHARA

Makoto HISADA

Esturo SAKAI

Takehiro YAMASAKI

Isao UJIKE

Chikanori HASHIMOTO

Hirotaka KAWANO

Hiroshi MUTSUYOSHI

SeiJi SOEDA

 

Members from Sponsoring Organizations

Kiyohiko UCHIDA

Kenichi MATSUI

Keichi KOSUGE

Kozo MURATA

Masamichi TEZUKA

Izumi FUJIMOTO

Tatsuo KITA

Takehiko MARUYAMA

Kyoichi TANAKA

Toshio YONEZAWA

Takeshi OTOMO

Masahiko YONEDA

Yo TAKEBE

Kenichi MOTOHASHI

 

 

SYNOPSIS

 

Recommendations for the Design and Constructions of Concrete Structures Using Silica Fume in Concrete which have been drafted for the first time in Japan, are presented. Silica fume consists of ultrafine particles obtained when collecting dust from the waste gas generated during the production of metallic silicon and ferrosilicon in an arc furnace. They are ultrafine spherical particles with a diameter of less than 1 ƒÊ m, average diameter of about 0.1ƒÊm, average specific surface area of about 20 m2 /g by the BET method using nitrogen adsorption, and specific gravity of about 2.2. Silica fume is the mineral admixture in use with concrete in order to realize the high-performance concrete structures in the same sort as fly ash and ground granulated blast furnace slag (BFS). In this recommendations, the general requirements for design and construction when concrete containing silica fume is applied to general structures, marine structures, pavement, shotcrete, and precast concrete products are described. In addition to these recommendations, quality standards and new test method as for silica fume are reported.

 

KEYWORDS: concrete structures, silica fume, ultrafine spherical particles, high strength concrete, silica fume replacement ratio, Si02 content, activity index