| 摘要 |
<P>PROBLEM TO BE SOLVED: To inexpensively provide a drum of a ready-mixed concrete mixer vehicle excellent in heat resistance, abrasion resistance, adhesion resistance and shock resistance, by forming the drum of a ready-mixed concrete mixer vehicle with two-layer resin to reduce the weight of the drum. Ž<P>SOLUTION: The inner surface of the drum body of a ready-mixed concrete mixer vehicle, where ready-mixed concrete gets in touch, is formed of a urethane resin with 20-30 mm thickness, and the outer shell of the urethane resin is formed of an FRP so as to make a two-layer structure. By making the rotary drum 2 into a two-layer structure of synthetic resins, the weight of the rotary drum 2 can be reduced so that fuel consumption decreases. Also heat resistance, abrasion resistance and adhesion resistance against ready-mixed concrete can be improved because of forming the two layers with synthetic resins having a lower thermal conductivity compared to a steel plate. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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