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Fire-Temperature Influence on Portland and Calcium Sulfoaluminate Blend Composites
Konrad A Sodol1, Łukasz Kaczmarek1, Jacek Szer2
1Institute of Materials Science and Engineering, Lodz University of Technology, 90-924 Łódź, Poland.
Materials (Basel, Switzerland)
|November 24, 2020
Summary
Calcium sulfoaluminate (CSA) cement blends enhance Portland cement (OPC) composites for fire systems. These modified materials show improved cooling performance and slower temperature rise during high-temperature exposure, acting as passive fire extinguishers.
Area of Science:
- Materials Science
- Civil Engineering
- Fire Safety Engineering
Background:
- Fire systems require effective cooling materials for infill and covers.
- Portland cement (OPC) and calcium sulfoaluminate (CSA) cements are common construction materials.
- Understanding high-temperature material response is crucial for fire safety.
Purpose of the Study:
- To investigate the fire-temperature influence on OPC and CSA cement blend composites.
- To evaluate these composites as cooling materials in fire systems.
- To compare their performance against conventional cooling materials like gypsum blends.
Main Methods:
- Testing four types of cement blend composites under high-temperature exposure (0-60 min).
- Monitoring core heat curves, specimen color changes, and mechanical strengths (flexural and compressive).
- Utilizing Differential Scanning Calorimetry (DSC) to determine material enthalpies.
Main Results:
- Composites with CSA cement exhibited slower temperature increase rates (100-150 °C) during high-temperature exposure.
- The 75% OPC/25% CSA composition showed the highest flexural and compressive strength after 60 min.
- Cooling property improvements were independent of strength variations.
Conclusions:
- Modifying OPC composites with CSA cement significantly enhances cooling performance in fire scenarios.
- These cement blends show potential as passive extinguisher solutions for future fire resistance systems.
- CSA cement incorporation offers a promising approach to improving fire safety in civil engineering applications.
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