| 摘要 |
PROBLEM TO BE SOLVED: To obtain an asphalt emulsion which can ensure an enough aggregate mixing time and provides a slurry having a fluidity suitable for application by incorporating an amidoamine or its water-soluble salt, a nonionic surfactant, and a naphthalenesulfonic acid-formalin condensate into the same. SOLUTION: This emulsion contains 0.01-10 wt.% amidoamine of formula I or its water-soluble salt, 0.01-10 wt.% nonionic surfactant (e.g. a polyoxyethylene alkylphenyl ether) having an HLB of 15-19.5, and 0.01-10 wt.% naphthalenesulfonic acid-formalin condensate, preferably the sum of these ingredients being 0.3-5.0 wt.%. The content of asphalt in the emulsion is 40-75 wt.%, and the emulsion further contains an acid for pH adjustment, a synthetic rubber latex, an emulsifying aid, etc. The emulsion is mixed with an aggregate in a wt. ratio of the emulsion to the aggregate of (5/95)-(30/70) before being used. In the formulas, R1 is a 7-21C alkyl or an alkenyl; R2 and R3 are each a 1-4C alkyl; m is 2-3; n is 1-1,000; and X is a cation.
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