fine aggregate
②Mixed design
③Mixing the cement
④Produce specimen
⑤Humidity curing
Ⅱ. test description
① Grind the specimen surface
② Strain Gage establishment
③ Measuring creep and shrinkage
④ Measuring strength
◎ Tension strength
- Theoretical value: => 2.12MPa< <3.45MPa, =27.6
- Experimental value:
■ Result discussion
High content of wate
high-test gasoline or naphtha on straight asphalt.
RC method of construction - RC sleeper concrete refers to concrete tie that compression is strong but strengthen reinforcing rod to strengthen seal because is weak to seal.
(1) RC method of construction
Fig 7. RC structure.
If define RC method of construction breifly, because rubing cement and sand, gouge the interval and call method of co
Strength of matrix MMC : Boron fiber/Al (2024) alloy
300M :
Raw material of the MMC
- Boron cost : 5000$/Kg
- Al (2024) alloy : 6000 won/Kg
300M(AMS 6417) : 168$
Produced in single-filament reactors by CVD, boron fiber exhibits a unique combination of High Strength High Modulus and Large Diameter.
Elemental boron is deposited on a fine
tungsten wire(1000~1300℃) substrate