Thermal and Physico-Chemical Characteristics of Plaster Reinforced with Wheat Straw for Use as Insulating Materials in Building
Abstract
:1. Introduction
2. Materials and Experimental Methods
2.1. Materials
2.1.1. Wheat Straw
2.1.2. Plaster
2.2. Samples Preparation
3. Characterization
3.1. Physico-Chemical Characterization of Materials
3.1.1. TGA
3.1.2. DSC
3.1.3. XRD
3.1.4. FTIR
3.1.5. SEM
3.2. Thermophysical Characteristics Measurements
Apparent Density
3.3. Thermal Conductivity
3.4. Time Lag
3.5. Energy Saving
4. Results
4.1. Thermal Property
4.1.1. TGA
4.1.2. DSC
4.2. Microstructure
4.2.1. XRD
4.2.2. FTIR
4.2.3. SEM
4.3. Thermophysical Properties
4.3.1. The Apparent Density
4.3.2. Thermal Conductivity
4.3.3. Time Lag
4.3.4. Energy Saving
5. Conclusions
- The FTIR and DRX results revealed that after incorporating varying amounts of wheat straw into the plaster, there was no influence on the level of chemical characteristics and that it was chemically stable, as well as no changes at the level of the matrix’s microstructure. On the other hand, TGA results showed strong thermal stability with an acceptable drop in mass after wheat straw integration, whereas DSC plots show an increase in peak temperature as well as enthalpy, which increases the thermal capacity of the compounds in which wheat straw was integrated. Wheat straw fibers induced an increase in pores and an acceptable distribution in the plaster matrix, resulting in excellent adhesion between the two compounds, according to SEM pictures.
- As for the thermophysical analytics, the samples were prepared, with different percentages of wheat straw, were prepared and tested to investigate their hygrothermal behavior. The results achieved from the test measurements show that the addition of wheat straw in the plaster matrix resulted in a linear reduction in the density and an increase in porosity. This means a reduction in thermal conductivity and therefore a more insulating behavior of the material. Furthermore, The time lag of a wall with varied configurations is impacted by the thermophysical parameters of the wall’s material, thickness, and orientation. So there is an inverse connection between the time lag and that of thermal energy and thermal diffusion. This is because as the wall thickness gets thicker, its heat storage capacity increases. Plaster containing 15% wheat straw has good energy saving, i.e., a small thermal conductivity.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Refrences | Sample Composite |
---|---|
CP | Comerciale plaster |
CP5 | Comerciale plaster + 5% of Wheat straw |
CP10 | Comerciale plaster + 10% of Wheat straw |
CP15 | Comerciale plaster + 15% of Wheat straw |
Samples | W m | (W m K) | (Jm K) | a (m s) | Time Lag (h) |
---|---|---|---|---|---|
CP | 0.408 | 0.123 | 1200.1 | 3.4 | 1.97 |
CP5 | 0.385 | 0.13 | 1160.3 | 3.32 | 2 |
CP10 | 0.377 | 0.133 | 1196.8 | 3.15 | 2.05 |
CP15 | 0.324 | 0.154 | 1130.0 | 2.87 | 2.15 |
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Saad Azzem, L.; Bellel, N. Thermal and Physico-Chemical Characteristics of Plaster Reinforced with Wheat Straw for Use as Insulating Materials in Building. Buildings 2022, 12, 1119. https://doi.org/10.3390/buildings12081119
Saad Azzem L, Bellel N. Thermal and Physico-Chemical Characteristics of Plaster Reinforced with Wheat Straw for Use as Insulating Materials in Building. Buildings. 2022; 12(8):1119. https://doi.org/10.3390/buildings12081119
Chicago/Turabian StyleSaad Azzem, Lokmane, and Nadir Bellel. 2022. "Thermal and Physico-Chemical Characteristics of Plaster Reinforced with Wheat Straw for Use as Insulating Materials in Building" Buildings 12, no. 8: 1119. https://doi.org/10.3390/buildings12081119