東亜建設工業 List of Products and Services

Foundation construction methods with functions as permanent structures for underground facilities, including temporary retaining walls, underground outer walls, two-way slab lateral pressure walls, composite walls, seismic walls, and support piles. 【Features】 - Expansion of underground space through composite walls and two-way slab lateral pressure walls. - Simple joint structure providing excellent workability and water-tightness. - High-precision construction management through a unique system, including excavation machine management, excavation accuracy management, concrete placement management, and stabilizing fluid management. For other functions and details, please contact us.

• Earthworks
• Piles, caissons, sheet piles
• Pile and foundation work

Recycled concrete aggregate made from concrete debris generated as a byproduct of construction.

• Ready-mix concrete

Concrete that combines high strength with fluidity and fillability.

• Concrete sheet piles and piles

A structural form that fills concrete inside steel pipes, enabling large spaces and large spans, thus expanding design freedom. 【Features】 ○ Large spaces, large spans, and high-rise buildings → Excellent structural strength and deformation capacity allow for larger column spacing and floor heights compared to other structural forms. ○ Shortened construction period → No formwork or rebar work for columns, leading to reduced construction time. ○ Cost-effectiveness → Smaller column cross-sections enable large spans, resulting in cost reductions compared to other structural forms. ○ Environmental measures → By not using formwork materials, construction waste can be reduced. ● For other functions and details, please contact us.

• Formwork material

We provide a safe and secure living environment through the diagnosis of aging buildings. 【Features】 ○ After conducting a detailed deterioration survey and seismic diagnosis of the building through visual inspections and sampling of the concrete structure on-site, we will assess the necessity for seismic reinforcement and propose reinforcement methods that take seismic performance into account. ○ Comprehensive support from building inspection to diagnosis, reinforcement design, and construction. ○ Detailed deterioration survey on-site. ○ Proposal of reinforcement methods suitable for the building. ● For other functions and details, please contact us.

• Other construction services

A method for suppressing explosive spalling by mixing a small amount of polypropylene resin powder, which has a relatively low melting point, into high-strength concrete to improve the fire resistance of reinforced concrete members. 【Features】 - Achieves 3 hours of fire resistance with a small amount of polypropylene resin powder. - The concrete itself has properties that suppress peeling and spalling, eliminating the need for fireproof coating, and costs less than 1/10 of that required for fireproof coating. - Has strength and durability equivalent to that of normal high-strength concrete. - No special equipment is required during concrete production. - Minimal changes in the properties of fresh concrete. ● For other functions and details, please contact us.

• Special Construction Method

Ensure building quality with a wet curing period equivalent to ordinary cement. 【Features】 ○ Achieves required strength and durability with a wet curing period similar to ordinary Portland cement and rapid hardening Portland cement. ○ A reasonable management method allows for a short construction period (curing period of 2-3 days), resulting in concrete structures with fewer cracks. ● For other functions and details, please contact us.

• Concrete curing material

A system that exhibits damping properties in a viscoelastic damper by managing temperature within a certain range. 【Features】 ○ A simple structure with a viscoelastic material sandwiched between steel plates ○ Can be installed not only in new buildings but also as seismic reinforcement for existing buildings ○ Provides consistently stable damper performance through temperature management ● For other functions and details, please contact us.

• Other construction services

Structural Design Method for Super High-Rise Reinforced Concrete Buildings Using Ultra-High Strength Materials 【Features】 ○ When constructing super high-rise buildings in reinforced concrete (RC) rather than steel-reinforced concrete (SRC), it is possible to achieve approximately a 10% cost reduction in the structural framework compared to SRC. ○ By utilizing precast components for columns, beams, floors, balconies, etc., and adopting a rational formwork system, it is possible to shorten the construction period by about 10% compared to SRC. ○ The use of high-strength concrete and high-strength rebar allows for longer spans and reduced cross-sections of components, enabling the creation of highly flexible spaces. ○ Adopting a ductile reinforced concrete structure improves seismic resistance. ● For other functions and details, please contact us.

• Balcony/Sunroom Unit
• Steel construction
• Other construction services

A construction method that sandwiches "laminated rubber" between the foundation and the building, isolating the building from the ground to prevent intense seismic vibrations from being transmitted to the building.

• Vibration isolation, vibration control, and earthquake resistance construction

A method for semi-fixed pile heads for cast-in-place piles, where a precast concrete ring (PC ring) is placed over the pile head to connect the pile and the foundation. 【Features】 ○ The arrangement of the pile head is simple, and there are no protruding rebar during installation, making the construction fast and easy. ○ The bending moment at the pile head can be reduced, resulting in less damage to the pile material compared to conventional methods, thus improving seismic resistance. ○ By reducing the pile head moment, the cross-section of the foundation beams and piles can be minimized, allowing for significant reductions in the amount of concrete and rebar used. ○ It is an environmentally friendly method that reduces the amount of excavated soil. ○ It can be applied to all cast-in-place piles (800-3000), including those with steel pipe wrapping. ● For other functions and details, please contact us.

• Concrete sheet piles and piles
• Piles, caissons, sheet piles
• Pile and foundation work

Lifting scaffold and associated fall prevention net installation protection unit 【Features】 ○ Reduces the number of temporary materials, leading to labor savings in temporary construction. ○ As a result of the above, the reduction in lifting temporary materials allows for a shortened construction period. ○ There is almost no need to rearrange temporary materials such as clamps, enabling safe work without the risk of falling objects during operations. ● For other functions and details, please contact us.

• Temporary Construction Materials
• Scaffolding and Support Materials
• Unit and other construction