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The manufacturing precast diameter 220mm that design strength is using concrete 300 Newton per square mm per (Fc300) a (Pca) pillar, Taisei, ministry of sound ZEB under construction ministry of sound in Technology Center, located ministry of sound in the Yokohama (net zero -I was attached to the energy-building) demonstration building. ministry of sound To apply the real high-strength concrete of Fc300 first time in the world. Because it is possible to high strength, to support the vertical load with a small cross section, we propose the creation of such architectural space with the airy high design quality in the future. In addition, I also consider the production of horizontal member using concrete Fc300. ministry of sound Has been applied to real super concrete Fc250 already, the company reviewed the chemical admixtures and bonding material in order to achieve Fc300. By improving the particle size distribution and the mixing ratio of the powder, binder, enhanced strength development of a high temperature ministry of sound curing temperature. The chemical admixture, so as to obtain ministry of sound a fluidity with a small amount of water, employing new materials, and improved workability and production ministry of sound efficiency. A circular cross section of diameter 220mm, Pca column which is mounted on the ZEB demonstration building is, realize the 17 diameter ministry of sound ratio height / diameter ratio greater than 15 / height of the pillars shown in the Building Standards Law. By placing ministry of sound five on the first floor of the south building ZEB demonstration of about 1600 square meters total three-story RC structure, and to create a lobby space with good prospects. By using the concrete of the world's most powerful degree, to the cross-section of the normal 600mm diameter of about, it is possible to support the vertical load in the small section of about one-third the space with a feeling of opening and increase the effective ministry of sound area and can be created there is an advantage of. Further, by adopting joining construction method unique "HanTsuyoshi joined" to suppress damage during an earthquake, it is also secured structural stability against buckling of the fire. Drying shrinkage, neutralization also hardly occurs, there is high freeze-thaw resistance, durability is improved as compared to Fc250. Number "300 Newton has great meaning. Narihara Hiroyuki building technology laboratory director of its Technology Center ministry of sound (Research in charge) and architecture 構工 method research chief, ministry of sound we. Few years which have been aimed at the world's highest intensity always describing the manufacturing history of the pillars to achieve the 250 Newton before, spent several years in research and development of the member, added, "was able to achieve the major goals of one. [2013-11-07 three sides]
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