EXHIBIT 23.8
 
Consent of Independent Auditors
 
We consent to the reference to our firm under the caption "Experts" and to the
use of our reports on
1) the consolidated financial statements of JTM Industries, Inc. and Subsidiary,
dated February 20, 1998, except for Note 8, as to which the date is March 27,
1998, 2) the consolidated financial statements of Pozzolanic Resources, Inc. and
Subsidiaries, dated February 10, 1998, except for Note 8, as to which the date
is March 4, 1998, 3) the consolidated financial statements of Power Plant
Aggregates of Iowa, Inc. and Subsidiary, dated March 13, 1998, except for Note
10, as to which the date is March 20, 1998, 4) the combined financial statements
of Michigan Ash Sales Company (d.b.a U.S. Ash Company) and Affiliated Companies,
dated March 11, 1998, except for Note 6, as to which the date is March 25, 1998,
and 5) the financial statements of Fly Ash Products, Incorporated, dated March
6, 1998, except for Note 7, as to which the date is March 27, 1998, in the
Registration Statement (Form S-4) and related Prospectus of JTM Industries, Inc.
dated June 5, 1998.
 
                                          /s/ Ernst & Young L.L.P.
 
Salt Lake City, Utah
June 5, 1998