日本コンクリート技術 List of Products and Services

The "ND Rebar Method" is a temperature crack prevention technique for mass concrete that effectively utilizes reinforcing bars. It suppresses cracks that occur and grow within the cross-section using the reinforcing bars placed inside. This method is effective for temperature crack prevention in large cross-sectional structures with a thickness of approximately 1.2 meters or more. Please feel free to contact us when you need our services. 【Features】 ■ Suppression of temperature cracks ■ Increased durability for longer lifespan ■ Effective utilization of reinforcing bars *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method

"Finish Coat" is an anionic surfactant with a molecular weight close to that of soap. It improves the efficiency of surface finishing work on concrete and reduces moisture evaporation from immediately after pouring to the early curing stage, thereby suppressing plastic shrinkage cracking, but it does not leave a "film" that would reduce the adhesion of the concrete. [Features] - Reduced moisture loss from the surface, improving crack resistance - Improved trowel glide, shortening the surface finishing work time - Significantly enhances the finishing efficiency of high-flow, high-strength concrete with minimal bleeding - Suppresses initial cracking *For more details, please refer to the PDF document or feel free to contact us.

• Concrete construction

This document introduces information about temperature cracking. It explains the "history of handling mass concrete" and the "effects of measures to suppress temperature cracking" using photos and graphs. Additionally, it includes examples of temperature stress analysis. Please take a moment to read it. 【Contents】 ■ History of handling mass concrete ■ 2017 Established Concrete Standard Guidelines Design Edition - Chapter 12 "Verification of Initial Cracking" - Section 6 "Verification of Temperature Cracking" ■ Effects of measures to suppress temperature cracking ■ Summary ■ Examples of temperature stress analysis *For more details, please refer to the PDF document or feel free to contact us.

• Heat insulation and heat shielding methods

This is a high-durability embedded formwork made of high-strength mortar with a water-cement ratio of 30% or less, reinforced with corrosion-resistant stainless steel rebar to achieve thin and lightweight construction. Instead of conventional embedded inserts, it features the use of truss steel materials for connecting and assembling with internal supports. It is applicable to both new construction and repair/reinforcement of existing structures, meeting the expectations of i-Construction through process shortening and labor-saving. 【Features】 (1) It improves the durability of reinforced concrete structures, particularly effective in high-corrosive environments such as coastal splash zones and roads where deicing agents are applied. (2) The use of truss steel materials ensures that the SDP form and the post-poured concrete are securely integrated, preventing delamination at the interface. (3) It allows for a reduction in cross-section thickness, thereby minimizing the increase in thickness during repair and reinforcement work. It can accommodate restrictions such as architectural limits and riverbed obstruction rates. For more details, please refer to our website and feel free to contact us. *We will hold a concrete diagnosis certification exam preparation course in May.

• Heat insulation and heat shielding methods
• Reinforced concrete construction
• Concrete construction

The ND Retarder Method is a temperature crack suppression technology that improves construction workability and economic efficiency by using concrete with a super retarder "ND Retarder (NDR)" that has a hydration heat suppression effect added to the upper part of the base slab. Currently, there are seven achievements, including those planned for structures such as culverts and wall-type bridge piers, mainly in projects directly overseen by the Ministry of Land, Infrastructure, Transport and Tourism. 【Features】 ○ Use of hydration heat suppression type super retarder ○ Improvement and enhancement of workability and economic efficiency ○ Suppression of temperature cracking ○ Increased durability leading to longer lifespan ○ Control of setting time with super retarder For more details, please contact us or download the catalog.

• Heat insulation and heat shielding methods