![\"\"](\"https:\/\/www.toyo-const.co.jp\/en\/wp\/wp-content\/uploads\/2021\/01\/20201030-3.jpg\")
Certificate of Technical Performance for Construction Materials for CELBIC<\/p><\/div>\n
![\"\"](\"https:\/\/www.toyo-const.co.jp\/en\/wp\/wp-content\/uploads\/2021\/01\/20201030-4.jpg\")
Mock-up specimen fabricated in the development experiment<\/p><\/div>\n
<\/p>\n
\u25a0Environmental considerations<\/p>\n
Ground granulated blast-furnace slag is made by pulverizing by-product slag produced during pig iron making in the
\nblast furnaces of ironworks and has hydraulic properties.
\nSince the amount of carbon dioxide emitted during the manufacture of ground granulated blast-furnace slag is less
\nthan 1\/20 than that of ordinary Portland cement, effective use of this granules is desired to reduce the environmental
\nimpact.
\nGround granulated blast-furnace slag is a concrete material used as a substitute for cement as one of the admixture
\nmaterials under JIS A 5308 (ready-mixed concrete). In general, it is distributed as blast furnace slag cement class B,
\nwhich is pre-mixed with Portland cement in a prescribed amount (at 40-45%) at a cement plant.<\/p>\n
<\/p>\n
\u25a0Features<\/p>\n
CELBIC is produced in a ready-mixed concrete plant using ordinary Portland cement and ground granulated blast-
\nfurnace slag as the concrete material, and according to the application parts or components of the building and the
\nspecified performance, 10% to 70% of the cement is replaced with ground granulated blast-furnace slag.
\nCELBIC is classified into three classes according to the amount of ground granulated blast-furnace slag: Class A,
\nClass B and Class C.
\nOf these, Class A has performance similar to concrete made of ordinary Portland cement, while Class B has
\nperformance similar to that of blast furnace slag cement Class B. Class C reduces carbon dioxide emissions by more
\nthan 60%, although the application at sites are limited. In addition, since these three types of CELBICs use the same
\nground granulated blast-furnace slag, the burden of material management at the ready-mixed concrete plants is
\nalleviated, and generic application for building structures by taking advantage of the distinctive features of each type
\nis expected.<\/p>\n
![\"\"](\"https:\/\/www.toyo-const.co.jp\/en\/wp\/wp-content\/uploads\/2021\/01\/20201030-5-1024x330.png\")
Names of CELBIC types, ground granulated blast furnace slag content ratio, Co2 reduction rate, and applicable parts and components<\/p><\/div>\n
<\/p>\n
\u25a0Development experiment<\/p>\n
In the development experiment, we confirmed the strength development and durability of concrete under various
\nconditions using several kinds of ground granulated blast furnace slag mainly distributed in Japan, and verified the
\nbasic performance of the concrete according to the content ratio of ground granulated blast-furnace slag.
\nBased on the results, we determined the selection of the plant and the method of concrete mix design, followed by
\nthe construction verification assuming the manufacture of CELBIC and actual parts and components at the actual
\nready-mixed concrete plant, and prepared the mix design & construction manual for CELBIC.<\/p>\n","protected":false},"excerpt":{"rendered":"
The CELBIC Study Group (consisting of thirteen companies: Haseko Corporation (organizer), Asunaro Aoki Construction Co., Ltd., Asanuma Corporation, Hazama Ando Corporation, Okumura Corporation, Kumagai Gumi Co., Ltd., Konoike Construction Co., Ltd., Penta-Ocean Construction Co., Ltd., The Zenitaka Corporation, Tekken Corporation, Tokyu Construction Co., Ltd., Toyo Construction Co., Ltd, and Yahagi Construction Co., Ltd.) has obtained a Certificate of Technical Performance for Construction Materials (GBRC Material Certification No. 20- 02) from General Building Research Corporation of Japan as of October 5, 2020 for \u201cEnvironmentally Friendly BF Concrete (CELBIC)\u201d, a concrete made of ordinary Portland cement mixed with 10-70% ground granulated blast-furnace slag. CELBIC, an acronym for \u201cConsideration for Environmental Load […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[358,354,104],"tags":[],"class_list":["post-6362","post","type-post","status-publish","format-standard","hentry","category-2020-t","category-technicalnews","category-topics","posttemplate-topics-typed"],"_links":{"self":[{"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/posts\/6362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/comments?post=6362"}],"version-history":[{"count":12,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/posts\/6362\/revisions"}],"predecessor-version":[{"id":7680,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/posts\/6362\/revisions\/7680"}],"wp:attachment":[{"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/media?parent=6362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/categories?post=6362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.toyo-const.co.jp\/en\/wp-json\/wp\/v2\/tags?post=6362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}