Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites
Abstract
:1. Introduction
2. Experimental Methods
2.1. Materials
2.2. Preparation of Reversible Photochromic PUC
2.3. Mechanical Properties Test
- F—ultimate load (N);
- A—compression area (mm2).
2.4. Fatigue Test
- P = the peak load (N);
- = the width of the bending specimen;
- h = the height of the bending specimen;
- = the maximum strain of the specimen center;
- a = the intermediate spacing between adjacent collets (m).
- f = loading frequency (Hz);
- t = time of hysteresis deformation (s).
- = dissipated energy of a single cycle (J/m3).
2.5. Characterizations
3. Results and Discussion
3.1. Mechanical Properties
- (1)
- Compression properties
- (2)
- Tensile properties
3.2. Analysis of Microscopic Morphology and Failure Mode
- (1)
- Microscopic morphology analysis
- (2)
- Failure mode analysis
3.3. Fatigue Properties
- (1)
- Analysis of bending stiffness modulus
- (2)
- Analysis of initial stiffness modulus
- (3)
- Analysis of lag Angle
- (4)
- Analysis of dissipated energy
- (5)
- Fatigue equation of EPUC
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Mesh Size (mm) | 9.5 | 4.75 | 2.36 | 1.18 | 0.6 | 0.3 | 0.15 | 0.075 | Mineral Powder |
---|---|---|---|---|---|---|---|---|---|
Percentage of through sieve | 95.0% | 60.0% | 44.0% | 32.0% | 22.5% | 16.0% | 11.0% | 6.0% | —— |
Aggregate mass (per 1000 g) | 50.0 | 380.0 | 319.2 | 170.5 | 62.2 | 15.2 | 2.6 | 0.3 | 0.02 |
Number | F01 | F02 | F03 | F04 | F05 | F06 | Average | Standard Deviation | Coefficient of Variation (%) |
---|---|---|---|---|---|---|---|---|---|
Density(kg/m3) | 1760 | 1775 | 1774 | 1781 | 1759 | 1762 | 1768.5 | 86.7 | 4.902 |
Compression strength (MPa) | 58.5 | 58.9 | 60.3 | 58.7 | 60.6 | 61.2 | 59.7 | 1.3 | 2.178 |
Number | ZL01 | ZL02 | ZL03 | ZL04 | ZL05 | ZL06 | Average | Standard Deviation | Coefficient of Variation (%) |
---|---|---|---|---|---|---|---|---|---|
Density(kg/m3) | 1760 | 1775 | 1774 | 1781 | 1759 | 1762 | 1768.5 | 86.7 | 4.902 |
Tensile strength (MPa) | 40.9 | 41.9 | 40.3 | 41.6 | 40.9 | 41.1 | 41.1 | 0.322 | 0.783 |
Number | Temperature | S-N Fatigue Equation |
---|---|---|
1 | −20 °C | lgN = 7.4397 − 0.0672σ |
2 | 0 °C | lgN = 7.6141 − 0.0559σ |
3 | 20 °C | lgN = 7.5484 − 0.0332σ |
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Jia, Z.; Jia, D.; Sun, Q.; Wang, Y.; Ding, H. Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites. Materials 2021, 14, 3839. https://doi.org/10.3390/ma14143839
Jia Z, Jia D, Sun Q, Wang Y, Ding H. Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites. Materials. 2021; 14(14):3839. https://doi.org/10.3390/ma14143839
Chicago/Turabian StyleJia, Zhen, Dongzhe Jia, Quansheng Sun, Yanqi Wang, and Hongjian Ding. 2021. "Preparation and Mechanical-Fatigue Properties of Elastic Polyurethane Concrete Composites" Materials 14, no. 14: 3839. https://doi.org/10.3390/ma14143839