Taisei Corporation

Other

Toho Rayon Co., Ltd.

Kuniomi Suzuki

Yasuro Ito

Hiroyasu Ogawa

Kenji Sugimoto

Yasuhiro Yamamoto

Hideharu Kaga

Kazuhisa Saito

Tadayuki Sumita

Mitsutaka Hayakawa

Kenji Kuroha

Yutaka Tsuruta

Takakazu Ishii

Toshikazu Matsuhashi

Teruo Yamamiya

Masahide Aga

A carbon fiber-reinforced cementitious composite having high strength, which comprises continuous carbon fibers and a cured cement composition, comprising cement particles having an average particle size up to about the average diameter of the carbon fibers, the cured cement composition being substantially interposed between the individual carbon fibers; and a method for producing it.

Carbon fiber-reinforced cementitious composite and method for producing

The fluidity of a plastic fluid, cement mortar for example, is measured by passing the fluid through a flow passage packed with an aggregate for simulating an actual mould, measuring the flow pressure, and measuring the quantitative flow coefficient between the fluid and the flow passage. The pressure remaining in the passage after the fluid has been poured into the passage and after the flow speed has been decreased to zero or the pressure after a quantity of the fluid has been added to the passage and prior to the discharge of the fluid from the passage is measured to determine the relative shear stress yielding value. Thereafter, the fluid is caused to flow to determine again the relative shear stress yielding value, and the relative closure coefficient is determined by the difference between said two relative shear stress yielding values. After the elapse of a predetermined time the plastic fluid is caused to flow under a pressure and the pressure at the commencement of the flow is measured to quantitatively determine the variation in the shear stress yielding value with time, thereby determining the relative initial flow pressure. The relative flow viscosity coefficient is measured by varying the flow speed of the plastic fluid and by determining the relationship between the speed and the pressure of the plastic fluid. In the actual moulding operation the plastic fluid is prepared by using the factors thus determined and the pouring conditions are predetermined, or automatically controlled.

Method and device for measuring the characteristics of plastic fluid and

Growing community of inventors

Tokyo, Japan

Kuniomi Suzuki