Pinoneer of the PC Technology

Pre‐Stressed Concrete Tank
Pioneer of the PC Technology
ABE NIKKO KOGYO CO., LTD.

A distributing reservoir is a required matterof a water system.
• A distributing reservoir must be got ready in awater system.
Reservoir

Water purification plant

Water supply
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ABE NIKKO KOGYO CO．，LTD．

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Pinoneer of the PC Technology

Pre‐stressed Concrete Tank
• The PC tank is strong structure and resistant toan earthquake and a tsunami.
• The PC tank is superior durable and water‐tightness by using a high‐strength concreteand PC tendon. There is no limitation of thedepth of the water. The required area for theconstruction may be narrowed.

Pre‐stressed Concrete Tank
• Construction cost is cheap. The PC tank of
3000m3 or more will be cheaper than the RC
tank. However, when the PC tanks which aresmaller than 3000m3 are constructed on ahighland and hillside, the amount ofearthwork and site area will be reduced, as aresult it is more economical. Therefore, the PC
tank is now widely recognized in the Japanesetank market.

ABE NIKKO KOGYO CO．，LTD．

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The principle of PC‐tankStave

Compression

Hoop

TensionStave
Hoop
BarrelPC‐tank

Stave → Concrete
Hoop → P S‐tendon
5CHARACTER of PC TANK TECHNOLOGYOur Technology①CONSTRUCTED THE FIRST PC WATER TANK IN JAPAN.
We designed and constructed the first PC water tank in Japan
in 1957.More than 8,000 PC tanks have been built before now ,and we engaged in more than 60% of them. We have muchtechnical know‐how about design and construction.
②AIR DOME METHOD
We developed and have diffused the breakthrough method ofbuilding the dome roofs , which is ecological , safe and durable.
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Pinoneer of the PC Technology

CHARACTER of PC TANK TECHNOLOGY
Advantage of products and technology①The PC tank needs low materials and lightweight. It will notoccur cracks and leakage. There is no limitation of the depthof the water , so the required area for the construction may
be narrowed. PC tanks have been in widespread use becauseof the economic efficiency.

② Air‐Dome Engineering is safety construction method anddoesn't require formwork and support.

It is superior in term of durability of inside of the dome
because the membrane remained in inside of the dome.
There are 227 results in Japan.
7Air‐Dome Engineering
Membrane(1.15mm thick)

A Formwork and support is unnecessary.
Not require the skilled workers and also
can sharply reduce labors.

Rising the air pressure

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Pinoneer of the PC Technology

Air Dome Engineering
Characteristics• The air dome Engineering is an labor‐saving
method for building the dome roofs of pre‐stressed concrete tanks.
• Instead of the conventional formwork
materials and shoring materials, it is used amembrane material which is fixed by airpressure and mortar shell that is placed on themembrane.
9ON‐SITE APPLICABILITY• Most materials are “local production and localconsumption”, and construct by local labors.
Cement , aggregate and rebar are local materials.
Limited materials, for example, PC steel is supplied
from neighbor countries. Local labors constructforms , cast concrete and so on.
• Bring up PC engineers
From designing to constructing , engineers needmuch technical know‐how.
So we’ll coach and bring up local engineers , andengage in technology transfers.
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