日本海上工事 List of Products and Services

In recent years, there have been many cases in new construction projects for urban civil engineering and architectural structures where cavities and underground installations in the foundation ground have become obstacles in design and construction. Among these, damage to buried gas pipes in urban areas, as well as ground subsidence and collapse due to cavities, pose significant risks, making their investigation crucial. Various exploration methods are applied for the investigation of buried objects and cavities depending on the target object and depth, and it is important to select the appropriate exploration method.

• Structural Survey

Hydrocrete was born in 1979 as the first non-segregating underwater concrete in Japan, enabling the construction of underwater structures with thin and wide components, reinforced concrete components, and highly reliable components, which were difficult to achieve with conventional underwater concrete. It has been used in many projects, including ports, fishing ports, rivers, and dam construction. Additionally, long-term durability has been confirmed through specimens exposed to the sea since 1985.

• Harbor Construction
• Airport facilities
• River construction

The "Penetrating KS Primer" is a high-durability epoxy-based adhesive that penetrates fine cracks to strengthen loose or weak areas of the base concrete. By combining it with the second layer adhesive "KS Bond" for fresh concrete joints, stable adhesion performance can be ensured even when cracks are inherent in the base concrete (achieving both penetration and adhesion performance). 【Features】 ■ Fills fine cracks (microcracks) in concrete ■ Integrates with the substrate due to strong adhesion performance ■ Allows adhesive application in accordance with the opening time of ultra-rapid hardening concrete (above 10°C) ■ Possesses water resistance, heat resistance, and fatigue resistance ■ Suitable for application over a wide temperature range (5–40°C) *For more details, please refer to the PDF document or feel free to contact us.

• glue
• Reinforcement and repair materials

"KS Bond" is a high-durability epoxy adhesive used for joining fresh concrete with steel or concrete substrates. It allows for adhesive application that matches the opening time of ultra-rapid hardening concrete, which is typically released in 3 hours (at temperatures above 10°C). To accommodate a wide temperature range (5 to 60°C), we offer three types with adjusted viscosity for summer, winter, and spring/autumn use. 【Features】 ■ Adhesive application that matches the opening time of ultra-rapid hardening concrete ■ Strong bonding performance that integrates with the substrate ■ Fatigue resistance, water resistance, and heat resistance ■ Excellent salt resistance, good freeze-thaw resistance, and rust prevention performance ■ Three types available for summer, winter, and spring/autumn *For more details, please refer to the PDF document or feel free to contact us.

• glue

The asphalt mat is formed by embedding reinforcing core materials, lifting wire ropes, and lifting fittings within asphalt aggregate. It is widely used in hydraulic structures from rivers and coastlines to oceans, and can also be used for prevention of permeability, slope protection, water cutoff works, and anchoring measures. 【Main Uses】 ■ For Increasing Friction - By installing it between caissons, block walls, etc., and the riprap, it is possible to use a friction coefficient of 0.8, allowing for a reduction in cross-sectional width. ■ For Erosion Prevention - It can bend into the slopes of erosion holes that occur on the front and back surfaces of riprap mounds and wave-dissipating blocks in ports and coastal structures, stopping the progression of erosion. ■ For Preventing Suction - It can be laid on the bottom surfaces of riprap mounds and wave-dissipating blocks to prevent the suction of bottom materials (sand). - It can be laid on the back side of riprap mounds for reclaimed shorelines to prevent the loss of backfill materials due to suction. *For more details, please download the PDF or contact us.

• Reinforcement and repair materials