| An Application of High-strength Concrete with
Design Strength of 130N/mm2 |
 |
| Shusuke KUROIWA *1, Satoshi WATANABE *1, Hiroshi
JINNAI *2, Satoru NAMIKI *1, Kunihiko KAWAI *3, Rieko TERAUCHI *4 and Masato
IIJIMA *4 |
| The latest high rise residential buildings must
have not only long-term durability, but also often require designs that allow
ease of changing the room layout, which enables use beyond a single generation.
Therefore it is required that more space be provided between columns by reducing
the number of columns. In our company, concrete of specified design strength
of 100 N/mm2 has been used in columns of high rise residential buildings from
1997, and minister of authorization of concrete of specified design strength
of 150 N/mm2 was acquired in 2002. Recently, concrete of specified design strength
of 130N/mm2 was used in an actual structure for the first time in Japan. It
is shown from quality control data, such as unit water content tests, slump
flow tests, air content tests and compressive strength tests, that the quality
was sufficiently stable. Core specimens were cored through column models produced
during the construction in this project, and it was found that the strength
of concrete in the structure satisfied design strength. |
| keywords: |
high-strength concrete, quality control,
unit water content, strength of concrete in structure, spalling |