| 摘要 |
PROBLEM TO BE SOLVED: To provide a paving method suitable for repairing a road or the like, low in costs and improvable in construction work efficiency by remarkably shortening a curing time and a construction period, and reducing work processes at a site. SOLUTION: Aggregate crushed to appropriate grain size is spread all over and compacted, and then a moisture-curable polyurethane resin solution is sprinkled thereon and cured. Although the aggregate used in this case may be gravel and crushed stones of course, an asphalt waste material is also usable. The polyurethane resin solution is formed by mixing ethyl acetate used as a diluent, in specially modified moisture-curable polyurethane, and adjusting the viscosity to acquire a solution suitable for sprinkling. As the sprinkled amount of the polyurethane resin solution, it is preferable that the weight ratio to the aggregate is 4-15%. Further, a hardening accelerator may be added in the solution, and carbon or carbon fiber can also be added as a reinforcing agent. COPYRIGHT: (C)2004,JPO
|
