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Preparation and Process Optimization of Hot-Pressed Straw-Sulfate Magnesium Cement Composite Panels
Dongqing Zhong1, Jianyong Lu1, Jin Wang1
1Institute of Straw Ecological Building Materials, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China.
This study developed lightweight, fire-resistant artificial boards using wheat straw and magnesium oxysulfide cement. Optimal processing yielded boards with excellent mechanical properties and low water absorption expansion.
Area of Science:
- Materials Science
- Construction Materials
Background:
- Magnesium oxysulfide cement offers lightweight and fire-resistant properties.
- It shows potential for producing artificial boards.
Purpose of the Study:
- To prepare and evaluate artificial boards using wheat straw and magnesium oxysulfide cement.
- To determine optimal processing parameters for enhanced board performance.
Main Methods:
- Wheat straw and magnesium oxysulfide cement were used to create artificial boards.
- Uniform laying and hot pressing techniques were employed.
- Orthogonal experiments were conducted to optimize process parameters.
Main Results:
- Optimal conditions (12 min, 120 °C, 7.5 MPa) were identified.
- Peak performance included static bending strength of 6.09 MPa, elastic modulus of 764 MPa, and internal bonding strength of 2.21 MPa.
- The 2-hour water absorption thickness expansion rate was 242.6%.
Conclusions:
- Straw-magnesium oxysulfide cement artificial boards demonstrate promising mechanical properties.
- The developed boards are suitable for applications requiring lightweight and fire-resistant materials.
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