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Material Property The design strength grade of concrete was C25, but the real strength grade of concrete was C15 due to bad material and construction.
Huazhong University of Science and Technology Press, Wuhan, China, 2002.
China Civil Engineering Journal, 1997, Vol. 30, No. 5, 37-42.
Journal of Building Structures, 2005, Vol. 26, No. 2, 94-100.
Journal of Southeast University (Natural Science Edition), 2002, Vol. 32, No. 5, 737-740.

Guangdong Agricultural Science, 2011, (23): 155-157
J Food Science, 2003, (8), 24: 196-200
Journal of Hygiene Research, 2004, 55 (4): 404-406
Chinese Journal of Geochemistry. 2008(1) 27:041-045
Environmental Science and Management,2008, 6, 33(6):20 -23.

Acknowledgments This study was majorly supported by State Major Major projects for Science and Technology ‘High-Grade NC Machine Tools and Basic Manufacturing Equipment ’, the People's Republic of China, under the grant number 2009ZX04001-081 and 2009ZX04011-041.
Ni, “Dynamic modeling for machine tool thermal error Compensation”, Journal of Manufacturing Science and Engineering, Vol 125, pp. 245–254, 2003
[4] Wu Hao, Zhang Hong tao, Guo Qianjian, Wang xiushan, Yang Jianguo, “Thermal error optimization modeling and real-time compensation on a CNC turning center”, Journal of Materials Processing Technology, Vol 207, pp. 172-179, 2008 [5] J.S.
Chen, “Neural network-based modelling and error compensation of thermally induced spindle errors”, The International Journal of Advanced Manufacturing Technology, Vol 12, pp. 303–308, 1996 [6] J.Y.
[8] Deng JL, “Basis of grey theory”, Huazhong University of Science and Technology Press, People’s Republic of China, 2002

Graça, C.A.A Cairo, Densification study of titanium powder compacts,Materials Science Forum, 498-499 (2005) 211–216 [6] R.M.
Materials Science & Engineering A, 347 (2003) 315-324
G.Lemos, Production of Ti 13Nb 13Zr alloy for surgical implants by powder metallurgy, Journal of Materials Science, 45 (2010) 5844-5850
Cairo Production of New Titanium Alloy for Orthopedic Implants, Materials science & engineering C, 24 (2004) 683-687
Cairo Characterization of Ti-35Nb-7Zr-5Ta Alloy Produced by Powder Metallurgy, Materials Science Forum, 498-499 (2005) 34-39.

Materials and Test Methods To investigate the bond between asphalt layers in asphalt pavement, two typical HMA (AC-25 and ATB-25) were used.
Table 3 shows summary shear testing results for normal stress of all the tack coat materials tested.
Millien: Road Materials and Pavement Design Vol.10 (2009) No.3, p.609
Petit: Construction and Building Materials Vol.25 (2011) No.1, p.1123
Khabiri: Journal of Civil Engineering and Management Vol.13 (2007) No.1, p.71

They contain the researches, which were conducted within the project GP – 489, financed by Ministry of Education and Science of Ukraine.
The quality changing of raw materials during the thermal field action also causes the qualitative transformations of the environment [4, 5].
International Journal of Mining Science and Technology, 24(4), 573–580. doi:10.1016/j.ijmst.2014.06.001 [9] Falshtynskyi, V.S., Dychkovskyi, R.O., Saik, P.B., Lozynskyi, V.H., & Cabana, E.C. (2017).
The influence of fine particles of binding materials on the strength properties of hardening backfill.
Journal de Physique IV (Proceedings), 134, 977-982. doi:10.1051/jp4:2006134149 [34] Pisarenko, G.

This has become possible with the availability of the new cutting tool materials (cubic boron nitride and ceramics) [1].
This material, when used for cutting edge allows the cutting of materials above 50 HRC at speeds up to 300 m/min.
Machining hardened steel is one of the types of difficult-to-process materials.
Mehrotra, Applications of ceramic cutting tools, Key Engineering Materials 138-140 (1997) 1-24
Key Engineering Materials 496 (2011) 205-210

Therefore, the effects and mechanism of oxalic acid and citric acid on Al availability in dark brown forest soil is analyzed in order to preferably evaluate vital roles of organic acids in temperate forest ecosystem. 2 Materials and methods 2.1 Soil samples Soil samples were collected from broadleaf secondary forest area in Maoershan experimental station of northeast forestry university.
Acknowledgements The work was supported by National Natural Science Foundation of China (30901145), China Postdoctoral Science Foundation funded project (200801277), the Fundamental Research Funds for the Central Universities (DL12CA01) and National Science and Technology Support Program (2008BAD95B06).
[2] Jiangfeng You and ZhenmingYang:Journal of Plant Physiology and Molecular Biology Vol.31 (2005),p.111-118,in Chinese
[5] Qingru Zeng, Xihong Zhou, Baihan Liao et.al: Journal of Tea Science Vol.21(2001),p.48-52,in Chinese
[9] Wenlong Lu,Yiping Cao,Fusuo Zhang:Chinese Journal of Applied Ecology,Vol.10(1999), p.379-382,in Chinese

Chinese Journal of Mechanical Engineering, Vol.38 (2002) [2] Materials & Processes.
Journal of Tongji University ('atural Science).
Journal of Materials Processing Technology.
Journal of Materials Processing Technology, Vol. 204 (2008), 70-79 [10] S.
Journal of Materials Processing Technology, Vol. 132 (2003), 95-101

With the development of modern mechanical, aeronautic and astronautic industry, and the breakthrough of materials science, the ball bearings made from silicon nitride are widely used for high speed, high temperature, vacuum, radiation, running dry and strong erosion conditions because of their high-temperature resistance, erosion resistance, low expansion coefficient, low density, high hardness, etc.
The machining efficiency of ceramic balls is very low because the hardness of engineering ceramic materials is very high, and the materials are difficult to be machined, being a main reason that why the cost of ceramic balls is so high.
A diverging magnetic field is thus achieved in the fluid, which causes non-ferromagnetic materials (the balls and grits) to float.
Jin, et al: Journal of Materials Processing Technology Vol. 129 (2002), p. 446 [2] C.Z.
Jin, et al: Journal of Materials Processing Technology Vol. 129 (2002), p. 423 [3] S.