GHG Reduction

• Ways to Reduce Cement GHG at Cement Plants
  • Blending SCM at Cement Plants
  • Environmentally Friendly Fuel for Cement Kilns
  • Use of Interground Limestone
  • Production Efficiency Improvements
• Ways to Reduce Concrete GHG at Batch Plants
  • Blending SCM at Concrete Batch Plants
  • Optimize Cement Content
  • Reduce Concrete Waste
  • Universal GHG Emission Standards

Related Links

This strategy requires that all cement used in California has a maximum GHG intensity factor of the average California intensity factor of 0.86 ton of CO₂ per ton of cementitious material.

The reason for establishing universal GHG emission standards is to avoid GHG emissions "escaping" to other cement plant locations around the globe. Since climate change is a global issue, AB32 implementation should not increase GHG emissions in other parts of the world.

The calculation of cement imported from other parts of the world should include the GHG cost of transportation, which can be significant. For example, assume that cement is imported from from a place 7,000 miles away into California by ship. As a result, the GHG transportation cost is about 0.15 ton of CO₂ per ton of transported material. The following figure shows GHG emissions as a function of traveled distance for three major modes of transportation: by ship, by train, and by truck.

This chart is based on data presented in a publication on transportation options provided by Hydro-Quebec.

 

 

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