Hayes was shown a straight red for tackling Mikael Lustig during the Dons' dramatic 2-1 win at Pittodrie last weekend.
Hayes appealed the sending-off with the Scottish Football Association, but a disciplinary tribunal has upheld referee Craig Thomson's crazy decision.
And the 28-year-old will now sit out Sunday's trip to Hearts, which is live on Sky Sports, and next Wednesday's League Cup tie at Hibernian.
Source: Sky Sports