Outline
- Abstract
- Keywords
- 1. Introduction
- 2. Experiment
- 2.1. Airport Pavement Design and Construction
- 2.2. Experimental Equipment
- 3. Results and Discussion
- 3.1. Melting Snow
- 3.2. Energy Distribution of Airport Pavement
- 4. Conclusions
- Acknowledgments
- References
رئوس مطالب
- چکیده
- 1. مقدمه
- 2. آزمایشات
- 2.1. طراحی و ساخت روسازی فرودگاه
- 2.2. تجهیزات آزمایشگاهی
- 3. نتایج و بحث
- 3.1. ذوب برف
- 3.2 توزیع انرژی روسازی فرودگاه
- 4. نتیجه گیری ها
- سپاس گزاری ها
Abstract
In this paper, the method of melting snow with carbon fiber grille buried in airport pavement is presented to avoid the adverse effects of snow-melting chemicals on the structure, function, environment and safety. The outdoor snow-melting experiment of airport cement concrete pavement is conducted when the snow is heavy and the air temperature is from − 3 °C to − 1 °C. Electrical power is supplied to the airport pavement through the use of carbon fiber grille. It is shown that, with an input power of 350 W/m2, the temperature of pavement surface can achieve an increment of 4.63 °C and the 2.7 cm thick snow can be melted within 2 h, which is just for melting snow at this condition. After the heating stopped, the residual heat can melt snow on the pavement in real time when the temperature of pavement surface is kept above 0 °C. The temperature and energy distribution along the depth of pavement are analyzed at different times. The findings indicate that the method of melting snow on airport pavement with carbon fiber grille is feasible in the snowy weather condition.
Keywords: Airport cement concrete pavement - Carbon fiber grille - Energy distribution - Melting snow - Temperature distribution - Three-dimensional infrared ray temperatureConclusions
Melting snow on airport pavement with carbon fiber grille was researched in this paper. The design and construction of airport pavement is reasonable, which the carbon fiber grille is located 5 cm below the pavement surface and the interval of heating wires is 10 cm. From the limited experiments, a snow-melting input power of 200–350 W/ m2 is required according to the snowy weather condition in Beijing. The validity of the proposed method of snow-melting with carbon fiber grille has been verified with the results of field full-scale experiments.
In the process of snow-melting, most of the energy is used to melt snow and heat airport pavement, the system inherently creates a nonlinear temperature gradient within the pavement. Whether the temperature stresses are large enough to induce a thermal expansion which widens existing cracks in the pavement and accelerates corrosion of the reinforcing mesh is still a question that needs to be researched.
The further researches include: the influence of the carbon fiber grille on the function of the structure and the bond between the reinforcing steel and the concrete; the field experiments of snow free all the time; the influence of the electromagnetic field on the aircraft navigation; and the application in practical engineering.