American Concrete Products S-4/A Registration of securities issued in business combination transactions (amended)

Exhibit 21

Subsidiaries of U.S Concrete, Inc.

Alliance Haulers, Inc.
Alberta Investments, Inc.
American Concrete Products, Inc.
Atlas Investments, Inc.
Atlas-Tuck Concrete, Inc.
B.W.B., Inc. of Michigan
Beall Concrete Enterprises, Ltd.
Beall Industries, Inc.
Beall Investment Corporation, Inc.
Beall Management, Inc.
Builders’ Redi-Mix, LLC
Central Concrete Corp.
Central Concrete Supply Co., Inc.
Central Precast Concrete, Inc.
Concrete XXXI Acquisition, Inc.
Concrete XXXII Acquisition, Inc.
Concrete XXXIII Acquisition, Inc.
Concrete XXXIV Acquisition, Inc.
Concrete XXXV Acquisition, Inc.
Concrete XXXVI Acquisition, Inc.
Eastern Concrete Materials, Inc.
Ingram Enterprises, L.P.
Ingram Enterprises Management, Inc.
Kurtz Gravel Company
Redi-Mix Concrete, L.P.
Redi-Mix G.P., LLC
Redi-Mix, L.P.
Redi-Mix Management, Inc.
Ready Mix Concrete Company of Knoxville
San Diego Precast Concrete, Inc.
Sierra Precast, Inc.
Smith Pre-cast, Inc.
Superior Concrete Materials, Inc.
Superior Materials, Inc.
Titan Concrete Industries, Inc.
USC GP, Inc.
USC LP, Inc.
USC Atlantic, Inc.
USC Management Co., L.P.
USC Michigan, Inc.
USC Payroll, Inc.
U.S. Concrete On-Site, Inc.
Wyoming Concrete Industries LLC