MORE THAN $1 BILLION

1 OLDCASTLE INC. / ATLANTA

No. 1 for five years running, this is North America's leading manufacturer of building products and materials. This Irish subsidiary of CRH plc has 1900 locations in all 50 states and four Canadian provinces. www.oldcastle.com

2 CEMEX INC. / HOUSTON

With a presence in 50 countries, this Mexico-based producer provides concrete and cement products to many sectors, including industrial, commercial, residential, and municipal. www.cemexusa.com

3 LAFARGE NORTH AMERICA / HERNDON, VA.

This is one of North America's largest building materials manufacturers with 1000 locations in North America. It introduced a LEED product guide app for mobile phones in 2011. www.lafargenorthamerica.com

4 HOLCIM / WALTHAM, MASS.

A subsidiary of Holcim, Ltd. in Switzerland, this company has 15 manufacturing facilities and more than 76 distribution terminals in the U.S., contributing to 14.5% of the company's revenue. It supplies cement and mineral components to 70 countries. www.holcim.com/us

5 COLAS S.A. / ROSELAND, N.J.

Headquartered in France, the North American operations account for 19% of revenue. Concentrating on road, air, rail, and maritime infrastructure, it completes more than 100,000 projects per year in 45 countries. www.colas.com

6 HEIDELBERG CEMENT / ALLENTOWN, PA.

This German company has operations in more than 40 countries, including the U.S. and Canada. U.S. operations include 163 ready-mix plants, 100 precast plants, and 226 aggregate facilities. www.heidelbergcement.com

7 VULCAN MATERIALS CO. / BIRMINGHAM, ALA.

The largest producer of construction aggregates in the U.S., this company has more than 300 facilities in more than 20 states, as well as the Bahamas and Mexico. 2010 showed signs of recovery, the company says. www.vulcanmaterials.com

8 TRINITY CONSTRUCTION PRODUCTS GROUP / DALLAS

Company serves construction, industrial, and energy sectors. The Construction Products Group was its only division whose revenue increased in 2010. www.trin.net/trinbusi/construct.html

9 MARTIN MARIETTA MATERIALS INC. / RALEIGH, N.C.

This producer of ready-mixed concrete saw improvements in aggregate volume, sales, and earnings in 2010. Infrastructure sales represent more than half of its business. www.martinmarietta.com

10 KNIFE RIVER CORP. / BISMARCK, N.D.

Since buying its first aggregate company in 1992, this company has acquired 69 more, with operations in the central, southern, and western U.S. Employs 5000 men and women at the peak of construction season. www.kniferiver.com

11 BUZZI UNICEM / BETHLEHEM, PA.

This Italy-based company manufactures construction materials with its core activity in production and distribution of cement, ready-mix concrete, and natural aggregates. It serves the Midwest, Southwest, Northwest, and Southeast, and Mexico. www.buzziunicemusa.com

$501 MILLION TO $1 BILLION

12 TITAN AMERICA LLC / NORFOLK, VA.

A subsidiary of Greek Titan Cement Co. S.A., this company operates in the Eastern U.S., manufacturing and distributing concrete, cement, and building materials. It serves the public and private sectors of concrete and building construction industries. www.titanamerica.com

13 MITSUBISHI MATERIALS / CORONA, CALIF.

Headquartered in Japan, concrete and cement account for 15% of revenue. Nevada Ready Mix is part of its operations in the U.S., where it anticipates moderate demand increase. www.mmc.co.jp/english/

14 TAIHEIYO CEMENT CORP. / GLENDORA, CALIF.

Japanese company manufactures concrete, cement, and environmental products. Its U.S. operations are primarily in the West Coast region and account for 7.5% of total revenue. www.taiheiyo-cement.com

15 TXI / DALLAS

In April 2011, this company bought Transit Mix Concrete and Materials, a subsidiary of Trinity Industries. This adds to TXI's ready-mix presence in Central Texas. The deal also included three sand and gravel plants. www.txi.com

16 ITALCEMENTI GROUP / NAZARETH, PA.

Based in Italy, this company's North American subsidiary accounts for 8.7% of revenues generated from production of ready-mix concrete, aggregates, cement, and related construction materials. Its 2010 fourth quarter showed signs of recovery. www.italcementigroup.com

17 GRUPO CEMENTOS DE CHIHUAHUA / CHIHUAHUA, MEXICO

This company produces, markets, and distributes ready-mix concrete, cement, aggregates, and other construction materials in the U.S. and Mexico. It has continued to expand and modernize its older facilities. www.gcc.com

$101 MILLION TO $500 MILLION

18 VOTORANTIM GROUP / BRIDGEVIEW, ILL.

Brazil-based company is one of the world's 10 largest producers of cement with operations in 24 countries. It sells about 4 million yards of concrete per year in North America. www.votorantim.com

19 U.S. CONCRETE / HOUSTON

This producer emerged from Chapter 11 bankruptcy last year, and although it reported losses for 2010, it remains optimisticforf a slow recovery. It has 102 fixed and 11 portable ready-mix concrete plants. www.us-concrete.com

20 CLYDE COMPANIES / OREM, UTAH

This company is a player in heavy civil construction, aggregate production, and construction products manufacturing. Two subsidiaries, Geneva Rock and Sunroc Building Materials, partnered with TV's Extreme Makeover, Home Edition to build a dream house for a Utah family. www.clydeinc.com

21 EAGLE MATERIALS INC. / DALLAS

Company produces and distributes wallboard and cement, as well as ready-mix concrete, aggregates, and recycled paperboard. Concrete and aggregate businesses are Centex Materials, Matthews Readymix, and Western Aggregates. www.eaglematerials.com

22 COUNTY MATERIALS CORP. / MARATHON, WIS.

This family-owned company supplies more than 30 locations throughout the Midwest with circular and elliptical concrete pipes, along with precast concrete products. www.countymaterials.com

23 CRETEX COMPANIES INC. / ELK RIVER, MINN.

Manufactures specialty and customized reinforced precast concrete products for residential and commercial construction in the Midwest and West. Recently acquired Concrete Products of Wyoming. www.cretexinc.com

24 CEMENTOS ARGOS S.A. / MEDELLIN, COLUMBIA

This Columbia-based company is the largest cement producer in Latin America and exports cement and clinker to 27 countries. The greatest concrete production capacity belongs to its subsidiary in the U.S., Argos USA, which operates 134 plants. www.argos.com.co

25 BORAL INDUSTRIES / ROSWELL, GA.

A subsidiary of Australian-based Boral Ltd., this company has several U.S. divisions which manufacture and distribute various building products. The U.S. subsidiary experienced a 16% increase from last year's revenue. www.boral.com