川田建設 List of Products and Services

We would like to introduce our "KK Grout Injection Method." In post-tensioned PC structures, when there is a cavity within the sheath through which PC steel materials are inserted, a powdered KK rust inhibitor is pressed into the cavity inside the sheath. Next, grout (KK grout if necessary) is injected into the cavity. This method suppresses the corrosion of PC steel materials through injection. 【Features】 ■ By pressing powdered KK rust inhibitor into the cavity, PC steel materials are protected from rust. ■ By injecting KK grout mixed with the rust inhibitor, macrocell corrosion is suppressed. *For more details, please refer to the PDF materials or feel free to contact us.

• grout
• Civil Engineering Method

The "KK Rationalization Joint" can be applied to thin "Precast PC Slabs." The shear key can resist shear forces in both directions. It can also be used for rebar storage during installation. Additionally, it can be applied to thinner slabs compared to loop joints, allowing for smooth construction. 【Features】 ■ Patent No. 5995788 ■ As a precast PC slab, it allows for thinner slab thickness and improved durability ■ Can be applied to thinner slabs compared to loop joints, enabling smooth construction ■ The shear key can resist shear forces in both directions ■ Can be used for rebar storage during installation *For more details, please refer to the PDF materials or feel free to contact us.

• Fittings
• Steel structure construction
• Reinforced concrete structural systems (including PCa)

"I Fix" is a construction method developed for the intermediate anchoring of PC steel wire with a diameter of 12φ5mm. By using wedges to anchor the horizontally prestressed PC steel material, the anchoring is completed before cutting the steel material, maintaining the prestress. Additionally, the anchoring device is compact and easy to work with, making construction management simple. It allows for control of the steel tension according to construction specifications. 【Features】 ■ Patent No. 6316864 ■ Anchoring is completed before cutting the horizontally prestressed PC steel material, maintaining prestress ■ The anchoring device is compact and easy to work with, simplifying construction management ■ Steel tension can be controlled according to construction specifications ■ A version compatible with multi-wire 12φ7mm has been introduced ■ Applicable to various types of steel materials *For more details, please refer to the PDF document or feel free to contact us.

• Bridge Construction
• Bridge Materials

"High-Quality FA Concrete" is a concrete for PC components that ensures stable quality and maintains the required air content by using modified fly ash (CfFA). In comparison to conventional early-strength concrete for precast PC components, we replaced 12% to 20% of the cement weight with sand containing CfFA and conducted tests. We have confirmed that it secures the necessary strength during prestressing, suppresses the penetration of chloride ions, and prevents carbonation. 【Features】 ■ Improved durability using modified fly ash (CfFA) ■ Stable quality ■ Maintains the required air content ■ Confirms the necessary strength, suppresses the penetration of chloride ions, and prevents carbonation *For more details, please refer to the PDF materials or feel free to contact us.

• grout
• Ready-mix concrete
• Reinforced concrete structural systems (including PCa)

Precast PC underground water storage tank that enables rational and economical design and construction adapted to site shape, avoiding water damage caused by rainwater runoff. 【Features】 ○ It is a rainwater retention facility composed of a one-layer multi-span structure made of factory precast roof components, side wall components, column components, etc., and a cast-in-place concrete base slab. ○ The roof components include a 10m roof beam and a 5m roof slab, which can be combined to accommodate the planned water storage volume and suitable shapes for the site. ○ The obstruction rate by columns is low, allowing for the construction of economical and efficient facilities. ○ The wide column spacing provides good visibility during maintenance, enabling cleaning with small machinery, etc. ○ By adopting a pin structure for the connection of precast major components and roof components, the construction period on site can be shortened. ● For other functions and details, please contact us.

• Joints between components
• Roof and gutter construction

A system that utilizes the central reservation of roads and underground spaces of sidewalks to mitigate peak flow during floods. 【Features】 ○ Surface drainage and watershed drainage are filtered and purified through a carbon layer, allowing clean water to flow through the waterway. ○ It can also be used as a regular sewer or drainage system, and by applying the "Midori-chan" system on the surface, it enables low-maintenance vegetation that does not require watering. ○ By combining with wood chip paving, a more comfortable sidewalk space can be created. ● For other functions and details, please download the catalog.

• Paving of sidewalks, roads, parking lots and stadiums
• Other construction services