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.