10 Cement Companies in the United States

Cement production in the United States is a complex and multifaceted industry that plays a crucial role in the country’s infrastructure and construction sectors. With an annual output of approximately 120.5 million metric tons, it is the third-largest cement producer in the world, following China and India. In this extensive educational blog post, we will delve deep into the United States cement industry, exploring not only the key players but also the entire cement manufacturing process, its environmental impact, technological advancements, and the role of cement in sustainable construction.

Cement, a fundamental building material, serves as the backbone of countless construction projects, from roads and bridges to residential and commercial buildings. Its production involves intricate processes, with a significant impact on the environment. In this educational journey through the U.S. cement industry, we will explore the following areas:

  1. Cement Production Process: An in-depth look at how cement is manufactured, from the extraction of raw materials to the final product.
  2. Key Players in the U.S. Cement Industry: A comprehensive overview of the prominent companies and their operations.
  3. Environmental Considerations: A discussion of the environmental impact of cement production and the industry’s efforts to mitigate its carbon footprint.
  4. Technological Advancements: An exploration of the innovations shaping the future of cement manufacturing.
  5. Sustainable Construction: An examination of how cement is used in sustainable building practices, including eco-friendly alternatives.

Cement Production Process

1. Raw Material Extraction

The journey of cement begins with the extraction of raw materials. The primary components of cement production are limestone, clay, and silica. These raw materials are extracted from quarries or mines and transported to the cement plant.

2. Crushing and Grinding

Once the raw materials reach the plant, they undergo a series of crushing and grinding processes. This reduces the materials into a fine powder, known as “raw meal.”

3. Preheating and Pre-calcining

The raw meal is then heated in a preheater to remove moisture and carbon dioxide. This preheated material is sent to the kiln for further processing.

4. Clinker Formation

The heart of the cement production process is the rotary kiln, where the raw meal is heated to extremely high temperatures, typically around 1450°C (2642°F). This process, known as clinkering, leads to the formation of clinker, a crucial intermediate product in cement production.

5. Grinding Clinker into Cement

The clinker is then finely ground with gypsum and other additives to produce the final product: cement. This grinding process ensures that the cement achieves the desired fineness.

6. Packaging and Distribution

The finished cement is packaged in bags or loaded into bulk transport vehicles for distribution to construction sites, ready-mix concrete plants, or storage facilities.

Key Players in the U.S. Cement Industry

1. CRH Plc

CRH Plc, the North American arm of the Ireland-based conglomerate, has a significant presence in the U.S. cement industry. Operating across the entire United States and several Canadian provinces, CRH is known for its rapid growth, particularly between 2015 and 2016 when it acquired assets from the merger of Lafarge and Holcim. With a total cement production capacity of 50.5 million metric tons per year across 39 integrated and 15 grinding plants, CRH is considered the largest building materials company in North America.

Website: CRH Plc

2. Cemex

Mexican company Cemex entered the U.S. market in 1994 and has since become one of the world’s leading cement manufacturers. Acquisitions, such as that of Australia’s Rinker Materials, significantly increased Cemex’s market share in the United States. The company owns 61 plants, including 52 active integrated plants and nine active grinding plants, with a combined capacity of 91.6 million metric tons per year. Cemex is headquartered in Houston.

Website: Cemex

3. Lafarge Holcim

Lafarge Holcim, established in 2015 through the combination of assets from former multinational producers Lafarge and Holcim, is a major player in the U.S. cement industry. The company owns a total of 220 plants and boasts an impressive 345.2 million metric tons per year of cement capacity, including 149 integrated cement plants and 57.9 million metric tons per year of grinding capacity.

Website: Lafarge Holcim

4. Lehigh Hanson

Lehigh Hanson, with its origins as a single mill operation in 1897, now operates as part of Heidelberg Cement. This company has made its mark in the United States through the acquisition of the Lehigh Cement Company in 1977. Lehigh Hanson produces various types of cement and owns 19 cement plants and over 70 distribution terminals across the United States and Canada, with its headquarters in Irving, Texas.

Website: Lehigh Hanson

5. Argos USA Corporation

Argos Cement Company, founded in 1936 in Colombia, expanded its operations to the United States by acquiring Southern Star Concrete and Concrete Express in 2005. Recognized as the fourth-largest cement production company in the United States in 2011, Argos has received distinctions for its sustainability efforts.

Website: Argos USA Corporation

6. Ash Grove Cement Company

Established in 1882, Ash Grove Cement Company opened its first cement production plant in 1908. Currently, it is recognized as the fifth-largest cement production company in the United States. Ash Grove Cement owns eight cement plants and 27 cement terminals, in addition to two deep-water import terminals. In 2018, Ash Grove Cement was acquired by CRH Plc, further solidifying its position in the industry.

Website: Ash Grove Cement Company

7. Buzzi Unicem

Buzzi Unicem is considered one of the leading cement manufacturing companies in the U.S. Established in 2004 through the merger of Buzzi Unicem SpA and Lone Star Industries, the company operates seven cement plants with a production capacity of nearly 9 million metric tons. Buzzi Unicem produces various types of cement and operates 34 cement terminals across 21 states in the United States.

Website: Buzzi Unicem

8. CalPortland Company

Founded in 1891, CalPortland Company has a rich history of quality cement production and innovation. It offers several types of cement, including Portland cement types I to V, blended Portland-limestone type IL cement, oil and well cement, and more. CalPortland has been recognized nationally for its efforts in energy conservation, emission reduction, recycling, and plant safety. The company operates thirteen cement production plants in the USA.

Website: CalPortland Company

9. Eagle Materials

Eagle Materials, established in 1960 with the opening of the Nevada cement plant, has cement manufacturing facilities in various states, including Illinois, Missouri, Nevada, Ohio, Oklahoma, Texas, and Wyoming. Recent upgrades and expansions have increased its production capacity by nearly five million tons per year.

Website: Eagle Materials

10. Essroc Cement Corp.

Founded in 1866 as Coplay Cement Co., the production of Portland cement began in 1872. Several acquisitions and name changes led to the formation of Essroc Cement Corp. In 1992, Italcementi SpA acquired Ciments Francais, resulting in the current entity. Essroc Cement Corp. produces a range of cement products and offers bulk cement, including Portland cements and supplementary cementing materials.

Website: Eagle Materials

Environmental Considerations

1. Environmental Impact of Cement Production

Cement production, while crucial for construction, has a notable environmental impact. The carbon emissions associated with the energy-intensive clinkering process contribute to global carbon dioxide emissions. Additionally, limestone quarrying can lead to habitat destruction.

2. Mitigating Environmental Impact

To address these concerns, the cement industry has been actively working on reducing its carbon footprint. Efforts include using alternative raw materials, adopting more energy-efficient kiln technologies, and exploring carbon capture and storage (CCS) methods. Sustainable practices such as reforestation and habitat restoration have also gained prominence.

Technological Advancements

1. Alternative Raw Materials

One notable advancement in the industry is the utilization of alternative raw materials. By incorporating materials like fly ash, slag, and natural pozzolans, cement manufacturers reduce their reliance on traditional raw materials, thereby decreasing environmental impact.

2. Energy-Efficient Kilns

Cement manufacturers have invested in energy-efficient kiln technologies. Modern kilns are designed to optimize combustion, minimize heat loss, and improve energy efficiency.

3. Carbon Capture and Storage (CCS)

Carbon capture and storage (CCS) technology has shown promise in mitigating the carbon emissions associated with cement production. CCS systems capture carbon dioxide emissions at the source and store them underground, preventing their release into the atmosphere.

Sustainable Construction

1. Green Building Practices

Cement plays a crucial role in sustainable construction. Green building practices, such as LEED (Leadership in Energy and Environmental Design) certification, prioritize environmentally responsible construction. Sustainable cement products, like low-carbon cements and eco-friendly additives, are becoming integral to achieving these certifications.

2. Sustainable Cement Alternatives

In addition to traditional Portland cement, there is a growing interest in sustainable cement alternatives. These include geopolymers, which use industrial waste materials to produce cement-like binders, and alkali-activated materials, which have lower carbon footprints.


The United States cement industry is a vital component of the construction sector, supporting infrastructure development and building projects across the country. Cement production involves a complex and energy-intensive process, but the industry is actively working to mitigate its environmental impact through innovative technologies and sustainable practices.

Key players like CRH Plc, Cemex, Lafarge Holcim, Lehigh Hanson, Argos USA Corporation, Ash Grove Cement Company, Buzzi Unicem, CalPortland Company, Eagle Materials, and Essroc Cement Corp. contribute significantly to the industry’s growth and development.

As the demand for sustainable construction practices grows, the cement industry continues to evolve. Innovations in alternative raw materials, energy-efficient kilns, and carbon capture and storage are changing the landscape of cement production. Sustainable construction, with a focus on green building practices and eco-friendly cement alternatives, is shaping the future of the industry.

With a deeper understanding of the cement production process, the key players in the U.S. cement industry, their environmental initiatives, technological advancements, and sustainable construction practices, it becomes evident that cement is more than just a building material—it’s a critical element in the quest for a more sustainable and environmentally responsible construction industry.

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