ultrahigh strength concrete - fujita | welcome to fujita · · 2013-03-11ultrahigh strength...
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Materials used
Purpose and usage
Ultrahigh Strength Concrete
Amsler's universal tester
(φ10×20cm)
compressive strength test piece
Scene of compressive strength test
Authorization of Ministry of Land, Infrastructure and Transport
0 0.1 0.2 0.3 0.4 0.5
160
120
80
40
0
160
120
80
40
0
High strength and young modulus
(N
/mm
2 )
stre
ss
strain Stress-strain curve
Ultrahigh strength concrete is used in the lower layer columns of high rise RC buildings. It has very high compressive strength and high density.
Slump flow test
Test pieces after fire resistance test under load (fire endurance: 3 hours)
Not mixed Mixed
・A special kind of cement and hard aggregate is used to ensure high compressive strength. ・Expanding admixture and shrinkage reduction agents are used to reduce autogenous shrinkage. ・Synthetic fiber is incorporated to absorb thermal stress and water vapor pressure to prevent explosion of concrete.
Synthetic fiber(polypropylene fiber)
FUJITA acquired authorization from Ministry of Land, Infrastructure and Transport for manufacture of ultrahigh strength concrete (design strength 130 N/mm2) at two factories.