2022 SFP 4-1 COMPLETED
Release time: 2024/07/17 Publisher： original Views：
Investigation on Recycled Polystyrene Particles/Foamed Concrete Composite Insulation Material and Its Application in Composite Sandwich Panel
Principal Investigator：
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Li Fangxian South China University of Technology |
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Project Background:
Expanded Polystyrene (EPS) foam products made of styrene extracted from petroleum resources are used in various fields of society, and most of them are discarded after use, resulting in great resource waste and great damage to the ecological environment. How to effectively use abandoned EPS foam, turn waste into treasure, and reduce the secondary pollution of EPS foam is of great significance to the sustainable development of society. Waste EPS foam is used as light aggregate for recycling and utilization. Based on the problems existing in the preparation of lightweight concrete with recycled EPS as aggregate and the current development trend of building assembly, recycled EPS particles, foamed concrete and calcium silicate board are used to prepare composite sandwich wall panels.
Aims & Goals:
1. By pre-wrapping method to avoid the floating of recycled EPS particles, to achieve the uniformity and stability of recycled EPS particles/foam concrete insulation material slurry;
2. To study the bubble stability in recycled EPS particles/foamed concrete slurry, and explore the solution of slurry collapse to promote the application of recycled EPS particles/foamed concrete insulation in composite sandwich wall panels;
3. To propose the method of solving core material cracking and stripping core material from panel, and improve the quality of composite sandwich panel;
4. To optimize the performance and construction method of recycled EPS particle/foamed concrete composite sandwich panels.
1. A double-coating particle pre-treatment method with coated slurry and composite coating was used to achieve the uniform distribution of EPS particles in cement-based materials, which improved the adhesion between EPS particles and cement-based materials. The mechanical properties of the resulting lightweight insulation materials were increased by more than 20%.
2. The production process for composite wall panels using EPS particles/foamed concrete as the core material and silicate calcium board as the surface material were obtained, and the panel has a surface density of ≤80 kg/m2 and a thermal transmission coefficient of ≤2.0 W/m2·K for 90mm thick, with mechanical and thermal properties improved by over 10%.
PAPER 2: 'Inffuence of slurry characteristics on the bubble stability in foamed concrete' Journal of Building Engineering, Volume 71, 15 July 2023, 106500
DOI: https://doi.org/10.1016/j.jobe.2023.106500
PATENT 1: The invention relates to a pretreatment method for EPS particles and a preparation method for EPS particles foamed concrete (filed)
STANDARD: Group standard - Light weight panels for exterior wall used in buildings (Draft)
DEMONSTRATION 1: 'Demonstration of recycled EPS particle foam concrete composite sandwich wallboard in building energy-saving reconstruction'.
DEMONSTRATION 1: 'Demonstration of recycled EPS particle foam concrete composite sandwich wallboard in building energy-saving reconstruction'.