Sustainability
California’s Concrete producers are engaged in a wide range of initiatives to reduce the carbon footprint of their product and from their operations. Nationally, concrete producers have reduced their carbon footprint by 21% since 2014. These are examples of their sustainability initiatives:
- Use of recycled concrete materials
- Reuse of returned fresh concrete.
- Using supplementary cementitious materials, such as fly ash, slag, and rice hulls
- Recycling materials from waste streams, such as glass and plastic
- Converting their mixer truck fleets to alternative fuels
- Sequestering carbon from manufacturing operations in concrete
- Evaluation of environmental impact in Environmental Product Declarations (EPD)
Resources to assist with providing low-carbon concrete:
Performance Specifications & Lower Carbon:
- Understanding Specifications for Structural Concrete – a presentation from CalCIMA’s Technical Committee
- NRMCA Guide to Improving Specifications for Ready Mixed Concrete
- NRMCA’s Prescription to Performance (P2P) specifications
- NRMCA’s The Top Ten Ways to Reduce Concrete’s Carbon Footprint
- Quantifying and Reducing the Carbon Footprint of a Concrete Building
- NRMCA’s Concrete Carbon Calculator
Portland Limestone cement
- CalCIMA workshop on Portland Limestone Cement
- Structural Engineers Association of Southern California – white paper on PLC
- Caltrans policy to allow PLC
- Oregon State study for Caltrans on PLC
- CA NV Cement Association on PLC
- “Greener Cement” web page
Recycling:
- AB 2953 San Diego County Compliance Overview
- Environmental Impacts of Recycled Plastic Concrete - Caltrans, Central Concrete Supply, Co., Inc, & Climate Earth, 2013
- FHWA on Concrete Recycling
- A Comprehensive Literature Review of Using Recycled Concrete Aggregates in Concrete Pavement - Caltrans & California Pavement Preservation Center, CSU Chico, 2019
Other Resources and Reports
National Ready Mixed Concrete Association – Sustainability
NEU - American Concrete Institute Center of Excellence for Carbon Neutral Concrete
MIT - Concrete Sustainability Hub
California Nevada Cement Association – Achieving Carbon Neutrality for California Cement Products
Incorporating the Effect of Carbonation in Concrete Life Cycle Assessment