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ACKNOWLEDGEMENT This work was supported by grants from The National Natural Science Foundation of China (51208386) and The Hubei Provincial Natural Science Foundation of China (2011CDB266) respectlivey.
Journal of Earthquake Engineering, 2003, 7(1): 119-147
Journal of Earthquake Technology, 2004, 41(1):53-73
ACI Structural Journal, 2005. 102(2):275-285
Journal of Building Structures, 2011, 32(9): 1-10.

This encourages development of new sustainable materials.
Materials Poly (L-lactic acid) grade 2002D (MW = 240,000 g/mol) was supplied by NaturalWorks LLC.
Mccarthy, Biodegradable Polymer Blends of Poly (lactic acid) and Poly (ethylene glycol ), Journal of Applied Polymer Science. 66 (1997) 1495-1505
Hillmyer, Polylactide Stereocomplex Crystallites as Nucleating Agents for Isotactic Polylactide, Journal of Polymer Science: Part B: Polymer Physics. 39 (2001) 300–313
Sarasua, Synthesis, structure and properties of poly(L-lactide-co-ε-caprolactone) statistical copolymers, Journal of the Mechanical Behavior of Biomedical Materials. 9 (2012) 100–112

Journal of Cleaner Production, 320, 128772
Materials Today: Proceedings
Journal of cleaner production, 229, 632-639
Science of The Total Environment, 163488
Journal of Building Engineering, 67, 105976

Test were also performed on the base material for comparison purpose.
For the base material specimen, microhardness profile was performed across thickness.
Microhardness of base material ranges from 74 to 84 HV100,15 (Tab. 1).
As a consequence crack growth approaches to the base material at 12 MPa√m.
References [1] Mishra M.S., Mahoney, M.W., Friction Stir Welding and Processing, ASM International, 2007 [2] Moreira P.M.G.P. et al., Theoretical and Applied Fracture Mechanics, 50 2, 2008, 81-91 [3] Uematsu Y. et al., Fracture of Nano and Engineering Materials and Structures, 2T5, 2006, 287 [4] Li B., Materials & Design, 32, 4, 2011, 2073-2084 [5] James, M.N., International Journal of Fatigue, 25, 12, 2003, 1389-1398 [6] John R., Jata K.V., Sadananda K., Inter J Fatigue 25, 2003, 939 [7] Hong S. et al., Journal of Materials Science, 42, 23, 2007, 9888-9893

Materials characters, Vol. 32, 179~187,1994
Journal of Intelligent Material Systems and Structures, Vol. 5, No.3, 382~390, 1994
Thermo-mechanical constitutive modeling and numerical implementation of polycrystalline shape memory alloy materials[D].
Journal of Intelligent Material Systems and Structures, Vol. 6, 817~839, 1995
Journal of Intelligent Material Systems and Structures, 4(2), 229~242, 1993.

Material and Methods Materials.
American Journal of Applied Sciences. 9 (11) (2012). 1862-1867
Cleaner Materials. 6 (2022) 1-13
Malaysian Journal of Analytical Sciences. 21 (1) (2017) 188-196
Journal of Taibah University for Science. 10 (2016) 56-62

Materials and experimental method Experimental materials Common Portland cement (42.5﹟) and common sand were used in this experiment.
It can used for regeneration of active materials.
Acknowledgements This work was financially supported by the Key Laboratory of Silicate Materials Science and Engineering, Ministry of Education of Wuhan University of Technology, and many conversations with academic partners.
China Building Materials Science and Technology, 2006,(4):9-12.
Journal of Building Material.Vol.9,No.1(Feb,2006)

And, fiber materials and durability are also researched.
Because CFRP,GFRP,AFRP and BFRP are fiber reinforced polymer materials, in addition to different elastic modulus and stretch rate, their stress mechanism are basically the same, so the calculation theory of concrete beams reinforced with CFRP can applies equally to the concrete beams reinforced with BFRP.
At present, there are many different methods for the calculations in the fiber reinforced polymer material area.
Experimental Study on Flexural Performance of RC Beams Strengthened with Basalt Fiber Sheet [J].Journal of Zhengzhou University (Engineering Science), 2009(2):61～65
Experimental Study on Reinforced Concrete Beams Strengthened with BFRP [J].Journal of Qingdao Technological University, 2010,31(1):29～32

Effect of Grinding Methods on the Performance of Ground Fly Ash Zhongyuan Lu1, a, Xun Xu1,b and Jun Li1,c 1School of Material Science and Engineering，Southwest University of Science and Technology， Mianyang 621010，P.
Ground fly ash as a excellent active mineral admixture has been widely used in the preparation of concrete materials.
Experiment 2.1 Raw Materials Coarse fly ash was supplied by Jiangyou-Bashu coal-fired power plant in china.
Table 1 Chemical composition of raw materials (%) Raw materials Loss SiO2 Al2O3 Fe2O3 CaO MgO SO3 K2O Na2O ∑ Fly ash 1.56 54.5 32.01 5.61 1.27 1.46 0.58 2.47 0.31 99.77 Clinker 0.97 21.00 3.90 2.73 66.16 1.97 2.30 0.34 0.32 99.69 2.2 Methods Preparation of cement.
Journal of Jiaozuo Institute of Technology (Natural Science) （in Chinese），2003，（1），15～20 [4] Zhu Hongji.

After a long time of intendance, bent-core LCs attracted intense attention when Niori et al reported ferroelectric properties in this kind of materials [3-5].
Color figures are welcome for the online version of the journal.
Clark: Science Vol. 288 (2000), p. 2181
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003) [6] P.G.