Pore Characteristics and Their Effects on the Material Properties of Foamed Concrete Evaluated Using Micro-CT Images and Numerical Approaches
Abstract
:1. Introduction
2. Preparation of Foamed Concrete Specimens
3. Micro-CT Image and Characterization of the Pore Structure
3.1. SEM and Micro-CT Imaging Method
3.2. Probabilistic and Quantitative Characterization Methods
3.2.1. Low-Order Probability Functions
3.2.2. Local Volume Ratio and Shape Factor
4. Properties Evaluation Using Experiments and Numerical Methods
4.1. Experiments for the Evaluation of Material Properties
4.2. Numerical Simulation for Thermal and Mechanical Analysis
5. Results and Discussion
5.1. Micro-CT Image and Characteristics of the Pore Structure
5.2. Material Properties of the Foamed Specimens
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Specimen | LithoPore®100 | LithoPore®200 | LithoPore®450 | LithoPore®600 |
---|---|---|---|---|
Target (dry) density (kg/m) | 100 | 200 | 450 | 600 |
Wet density (kg/m) | 150–158 | 305–315 | 530–545 | 710–760 |
Cement content (kg/m) | 61 | 170 | 215 | 285 |
Water (kg/m) | 28 | 77 | 125 | 225 |
Foam content (kg/m) | 67.2 | 64.3 | 59.2 | 52.0 |
Filler (fly ash and calcium carbonate) (kg/m) | - | - | 95 | 215 |
Network former LithoFoam® (kg/m) | 6 | 5 | 5 | 4 |
Stabilizer LithoFoam® (kg/m) | 0.6 | 0.6 | 0.6 | 0.6 |
Specimens | LithoPore®100 | LithoPore®200 | LithoPore®450 | LithoPore®600 |
---|---|---|---|---|
Thermal conductivity (W/m/K) | 0.05 | 0.08 | 0.14 | 0.24 |
Density (kg/m) | 100 | 200 | 450 | 600 |
Specific heat (J/g/K) | 435 | 380 | 250 | 178 |
Specimens | LithoPore®100 | LithoPore®200 | LithoPore®450 | LithoPore®600 |
---|---|---|---|---|
Elastic modulus (GPa) | 0.6 | 0.9 | 2.5 | 2.9 |
Poisson’s ratio | 0.3 | 0.3 | 0.2 | 0.2 |
Yield strength (MPa) | 0.45 | 0.9 | 4.2 | 7.2 |
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Chung, S.-Y.; Lehmann, C.; Abd Elrahman, M.; Stephan, D. Pore Characteristics and Their Effects on the Material Properties of Foamed Concrete Evaluated Using Micro-CT Images and Numerical Approaches. Appl. Sci. 2017, 7, 550. https://doi.org/10.3390/app7060550
Chung S-Y, Lehmann C, Abd Elrahman M, Stephan D. Pore Characteristics and Their Effects on the Material Properties of Foamed Concrete Evaluated Using Micro-CT Images and Numerical Approaches. Applied Sciences. 2017; 7(6):550. https://doi.org/10.3390/app7060550
Chicago/Turabian StyleChung, Sang-Yeop, Christian Lehmann, Mohamed Abd Elrahman, and Dietmar Stephan. 2017. "Pore Characteristics and Their Effects on the Material Properties of Foamed Concrete Evaluated Using Micro-CT Images and Numerical Approaches" Applied Sciences 7, no. 6: 550. https://doi.org/10.3390/app7060550
APA StyleChung, S. -Y., Lehmann, C., Abd Elrahman, M., & Stephan, D. (2017). Pore Characteristics and Their Effects on the Material Properties of Foamed Concrete Evaluated Using Micro-CT Images and Numerical Approaches. Applied Sciences, 7(6), 550. https://doi.org/10.3390/app7060550