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The construction of highway engineering needs a lot of materials such as asphalt and aggregates.
But the natural raw materials are in great shortage.
Reclaimed asphalt pavement (RAP) reuses the milled pavement materials.
In grading 2, the RAP amounts to 68% and 30.5% virgin materials are used.
The usage of virgin materials can improve the strength and stability of the cold recycled asphalt mixture.

The testing materials were nanofiber based on poly-vinyl alcohol (PVA) with addition of silver and copper in ions form.
Moreover, they contribute to the destruction of building materials by their biodegradation [11].
Silica materials with biocidal activity.
Marotta, Antibacterial and Bioactive Silver Containing Na2O·CaO·2SiO2 Glass Prepared by Sol Gel Method, Journal of Materials Science: Materials in Medicine, Vol.15, No.7, July 2004, pp. 831-837
Applied Clay Science, 53(4), 642-645.

Zirconia ceramic is the outstanding one among ceramic materials.
Shen: Diamond and Related Materials, Vol.12 (2003), p. 711 [2] P.J.
Robert: Dental materials.
Collins: Journal of Applied Physics.
Erdemir: Journal of Physics.

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On the one hand, the water resource provide the necessary material basis and conditions for social and economic development.
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Environmental Science Journal,2001,21( 3) : 312-317.
Water conservancy science and technology and economy,2010,16( 9) :1039-1041.
Based on the AHP method of water resource carrying capacity in chongqing[J].Water conservancy science and technology and economy,2012,18(5):3-6.

Journal of China University of Mining & Technology, 2006, 16(4): 385-388
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Mining Science and Technology, 2009, 19(4): 435-440.
Journal of Xi’an University of Science and Technology,2003,23(2):156-159.
Research on development mechanism of coal seam permeability based on coal evolution degree[J].Journal of Shandong University of Science and Technology: Natural Science, 2009, 28(2): 22-27.

Forging method is suitable for mass production due to simple tooth, stripping easy, forging directly in the mold of straight bevel gears, and can shorten the preparation time of gear production and saving material, but forging method requires an expensive mold, and different size specifications of straight bevel gears requires a corresponding mold.
Acknowledgements This research is sponsored by Tianjin City High School Science & Technology Fund Planning Project (No.20140408), the National Natural Science Foundation of China (No. 51475324 and No.51105269 ), National Science and Technology Supporting Plan (No. 2013BAF06B00), Tianjin Science and Technology Plan Projects (No. 13JCZDJC34000，No.14JCZDJC39600) References [1] Yi-Pei Shih, Study on the Flank Modification of Face Hobbed Hypoid Gear , Ph.
C, Surface Geometry of Straight and Spiral Bevel Gears Transactions of ASME, Journal of Mechanisms, Transmissions, and Automation in Design.109 (1987)443~449
[4] Shih Y P, Mathematical Model for Face-Hobbed Straight Bevel Gears, Journal of Mechanical Design, 134(2012) 91~106
B, Mathematical Model of Straight Bevel Gears with Octoid Form, Journal of the Chinese Society of Mechanical Engineers, 21(2000) 239~245

Introduction Improvement of properties of traditional ceramic materials and creation of new ceramics is impossible without expanding the range and improving the quality of initial powders and changing their chemical composition.
The development of new technologies, principles for the selection of additives contributes to the creation of materials with improved (often unique) physical and technical characteristics, or with a number of special properties.
Cao, Consolidation/synthesis of materials by electric current activated/assisted sintering, Materials Science and Engineering. 63 (2009) 127-287
SiC nanocomposite, Materials Letters. 33 (1998) 273-277
Roberts, Pressureless sintering and elastic constants of A12O3 – SiC nanocomposites, Journal of the European Ceramic Society. 17 (1997) 565-573

So it can provide science proofs for the countermeasures on pollution control of traffic noise pollution in urban district.
Materials and Method Data Preparation.
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Journal of Beijing University of Technology,vol.35(7),pp:953-959,2009

Table 1 Model parameters of micro-beam Material Length[µm] Width[µm] Thickness[µm] Finite element Au 200 20 2 SOLID45 Critical damping Relaxation.
General solutions for coupled equations for piezoelectric media: International Journal of Solids Structures, Vol. 33 (1996) No.16, p.2283
Effect of Air Slide-film Damping on Micro-mechanical Sensor at Atmosphere (In Chinese): Journal of Engineering Design, Vol. 10 (2003) No.5, p.271
Lin Analysis of Nano-beam Nonlinear Vibration Based on the Non-local Effects Using Multi-scale Method (In Chinese): Science China (Technological Sciences), Vol. 40 (2010) No.2, p.152
Dynamics of Transversely Vibrating Beams Using Four Engineering Theories: Journal of Sound and Vibration, Vol. 225 (1999) No.5, p.835.