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The road surface repair material of cold hardening type was tested for workability such as self-leveling, hardened properties, and hardening time for opening the traffic. The flow test was suitable for testing on self-leveling characteristics and the allowable flow time for the characteristic was 4 to 10 s and the handling time after mixing was 10 min at 20°C. The properties of hardened repair material were almost the same as those of a dense-grade hot asphalt mixture. The rutting resistance was superior to the dense-grade hot asphalt mixture. Flexural property and strength of this road repair material were satisfactory for bonding on the existing road surface. Its hardening time could be evaluated by using the durometer with semi-globular shape type of press needle and the hardness for early opening the traffic was approximately 85 at 60 min after finishing the repair work at 20°C.

Examination on Properties of Road Surface Repair Material of Cold Hardening Type and Simplified Evaluation Method of its Hardening Time