Cement Carrier

cement carrier

[si′ment ‚kar·ē·ər]
(naval architecture)
A special ship designed to carry bulk cement; usually fitted with an air-mixing system to allow pumping dry cement powder through pipes to unload or load the ship.

Cement Carrier

 

a transport vehicle for bulk cement. Cement carriers include motor vehicles, railroad cars, and river and oceangoing vessels. They may be equipped with horizontal or vertical tanks, and the cement feed from the tanks may be pneumatic (most common) or by gravity.

Motor vehicles are used to transport cement over distances up to 150 km. Those used in the USSR have load capacities of 8, 13.5, and 22 tons. The carrier consists of a tank on a semitrailer. Mounted inside the tank are chutes that feed air into the cement; the chutes consist of a metal trough, a porous partition made of cotton or Lavsan, and a metal incline. An air compressor is mounted on the chassis of the tractor. The carriers are usually loaded by gravity, but vacuum loading may also be used. Unloading is accomplished by starting the air compressor; air then passes through the partition of the chute into the cement in fine jets. The aerated cement flows like a liquid through the chutes (which are inclined at an angle of 6°) to a feed nozzle. Compressed air feeds the cement through the nozzle to a tower, which may be up to 25 m high.

Equipment used to transport cement by railroad over distances up to 1,000 km includes hopper cars with a load capacity of 60 tons, tank cars with a load capacity of 58 tons, and platform cars, on which several tanks may be mounted.

Cement-carrying ships are used in cases where the cement factory is located near waterways. The load capacities of such ships may reach 5,000 tons. Transportation by ship is also used for cement loaded in containers.

REFERENCES

Pnevmotransportnye ustanovki: Spravochnik. Leningrad, 1969.
Matveev, A. I. Sostoianie i perspektivy razvitiia oborudovaniia dliasistem pnevmotransporta. Moscow, 1975.
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Cement carrier Cemfjord went down with skipper Pawel Chruscinski and seven crew on Saturday.
Authorities said on Monday that the search for the seven Polish crew members and one Filipino of the Cyprus-registered cement carrier Cemfjord has been called off.
The 83-metre bulk cement carrier, which had been bound for Runcorn, Cheshire, on the west coast of the UK, sank below the water earlier this afternoon.
The 272ft (83m) bulk cement carrier had been bound for Runcorn, Cheshire, on the west coast of the UK.
Lifeboatmen involved in the operation fear the men's bodies remain trapped inside tb h the 272ft cement carrier.
Four lifeboats, two rescue helicopters and other ships were searching for the crew of the Cypriot-registered cement carrier Cemfjord, whose upturned hull was seen from a ferry in the Pentland Firth.
1% investment in Belden Shipholding Pte Ltd ("Belden"), a company that owns and operates cement carrier vessels, for $27.
Swire Bulk Logistics has joined forces with New Zealand s Golden Bay Cement, a trading division of Fletcher Building, for constructing, owning and operating a dedicated, self-discharging cement carrier.
And lifeboatmen involved in the operation fear the eight men's bodies remain trapped inside the 272ft cement carrier Cemfjord.
lmPw t Lifeboatmen involved in the operation fear the men's bodies remain trapped inside tb h the 272ft cement carrier.
7 million) contract from Norway's Belden Shipping Group to build a 20,200 dwt cement carrier.