Exhibit 23.1
Consent
of Independent Registered Public Accounting Firm
We
consent to the incorporation by reference in the Registration Statements (Form
S-8 Numbers 033-61461 and 333-133013) pertaining to the Astec Industries, Inc.
401(k) Retirement Plan of our report dated June 19, 2008, with respect to the
financial statements and schedules of the Astec Industries, Inc. 401(k)
Retirement Plan included in this Annual Report (Form 11-K) for the year ended
December 31, 2007.
/s/ Ernst
& Young LLP
Chattanooga,
Tennessee
June 19,
2008