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Low-CO2 Optimization Design of Quaternary Binder Containing Calcined Clay, Slag, and Limestone
Run-Sheng Lin1,2,3, Yongpang Liao1,2,3, Yi Han4
1Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China.
Materials (Basel, Switzerland)
|October 14, 2023
Summary
This study optimized low-CO2 quaternary binders using calcined clay, slag, and limestone for sustainable concrete. The developed response surface method achieved target strength, workability, and reduced CO2 emissions effectively.
Area of Science:
- Materials Science
- Civil Engineering
- Sustainable Construction
Background:
- Blended cements are crucial for sustainable concrete production.
- Reducing CO2 emissions in cement production is an environmental imperative.
- Developing novel composite binders is key to achieving these goals.
Purpose of the Study:
- To experimentally investigate and optimize a low-CO2 quaternary binder.
- To evaluate the binder's workability, strength, and CO2 footprint.
- To establish a design methodology for composite cements balancing performance and sustainability.
Main Methods:
- Utilized a Box-Behnken design for quaternary binder composition (calcined clay, slag, limestone).
- Conducted experimental tests for workability and compressive strength (3 and 28 days).
- Employed response surface methodology and a composite desirability function for optimization.
Main Results:
- Determined optimal binder compositions based on experimental data.
- Achieved target 28-day strengths (30-45 MPa) and workability (160 mm flow).
- Demonstrated consistency between predicted and experimental properties of optimal combinations.
Conclusions:
- The proposed optimization design effectively balances strength, workability, and low CO2 emissions.
- This approach provides a viable method for designing sustainable composite cements.
- The study contributes to the development of eco-friendly construction materials.
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