Crack-resistant special asphalt pavement *Highly regarded as a maintenance management product.
Relaxphalt HT
Special modified asphalt, which is attracting great attention as a countermeasure to suppress the occurrence of cracks in asphalt pavement and ruts!
"Relaxphalt HT" is a modified asphalt that has very high stress relaxation capability and deformation-following ability, as well as excellent flow resistance at high temperatures. It is effective in suppressing the occurrence of cracks and ruts on heavy traffic routes for large vehicles. 【Do you have these concerns?】 ◯ An asphalt overlay was placed on concrete pavement, but reflection cracks occurred early at the joints of the concrete pavement. ◯ A milling overlay was applied to existing asphalt pavement, but cracks appeared early on the surface due to the remaining cracks in the base layer. ◯ Low-temperature cracks caused by temperature shrinkage in cold regions are a problem. 【Achievements and Features】 ■ There is a case where the crack rate was 0.9% after 10 years of construction on a national highway! ■ It excels in flow resistance (plastic deformation resistance) and can be applied to heavy vehicle traffic routes! ■ It also has excellent stress relaxation capability and deformation-following ability at low temperatures! ■ It contributes to the long lifespan of the pavement and has a significant effect on reducing life cycle costs! *For more details, please download the catalog or contact us directly.
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basic information
The crack-resistant special asphalt pavement, Relaxphalt HT, can cover both cracking and rutting. The mixture used in the surface layer of Relaxphalt HT excels in "flexibility" from low to high temperatures and has excellent "resistance to plastic deformation" at high temperatures, with a fatigue resistance that is 13 times greater than that of modified Type 2 mixtures based on bending fatigue tests. As a result, while suppressing cracking, it also effectively reduces rutting due to its superior "resistance to plastic deformation." **Case Study: National Route 113 in Sekikawa Village, Iwafune District, Niigata Prefecture** On National Route 113 in Sekikawa Village, Iwafune District, Niigata Prefecture, aging occurred on the concrete pavement due to the passage of large vehicles and long-term chain driving. In 2003, as a repair project to overlay asphalt pavement on the existing concrete pavement, Relaxphalt pavement, which is rich in stress relaxation and deformability, was implemented. Now, about 10 years later, the effect of suppressing reflection cracks continues, and it has been confirmed that rutting and flatness are also in good condition! *For more details, please contact us.*
Price information
For more details, please contact us.
Delivery Time
※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
- Measures against reflection cracks in overlay layers on concrete slabs - Measures against reflection cracks in asphalt pavement - Measures against low-temperature cracks in cold regions
Detailed information
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The "Relax Asphalt Pavement" introduced on National Route 113 in Niigata Prefecture shows a remarkable reflection crack suppression effect of only 0.9% in Sekikawa Village, compared to approximately 18% crack rate after 10 years with conventional methods!
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General condition of asphalt pavement 10 years later: Due to the passage of large vehicles and long-term chain driving, aging occurs on the concrete pavement, and repaired areas are noticeable.
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Company information
Taisei Rotec Co., Ltd. is a road paving company established in June 1961 as part of the Taisei Corporation Group. Our history has been cultivated since the era of Okura Gumi Shokai, founded in the early Meiji period, and has been passed down through generations. We have built a track record in paving work such as asphalt and concrete paving, as well as repair work and product sales, marking our history as a road company. As experts in road paving, we cover a wide range of paving projects, including highways, general roads, airports and ports, sports facilities, streets and squares, and parking lot construction. Additionally, through civil engineering projects such as land development, joint trench work, and pipeline work that involve burying lifelines like water supply, sewage, and electrical lines, we contribute to building disaster-resistant communities. Going forward, Taisei Rotec will continue to aim for the creation of better environments so that people can engage in vibrant activities.