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Effects of Zn on Microstructure and Mechanical Properties of Mg-6.0Zn-0.6Zr-1.0Y Magnesium Alloys Quan Li1, a,*, Bin Zeng1, 2, Weibo Zhu1, Siya Wang1, Xianquan Jiang1, Fusheng Pan1, 2 1Chongqing Academy of Science and Technology, Chongqing 401123, China 2College of Materials Science & Engineering, Chongqing University, Chongqing 400030, China a156723583@qq.com Keywords: Magnesium alloy, Mechanical properties, Microstructure, Squeeze.
Experiments Alloy materials include Mg (mass fraction 99.3%), Zn (mass fraction 99.9%), Mg-31% Zr master alloy Mg-30% Y, and an intermediate alloy, low carbon steel refined in a crucible furnace 60kW resistor, the 5th flux as a refining agent and covering agent, by a water-cooled semi-continuous casting system Ф92 mm cast into ingots.
Materials Science and Engineering A349 (2003) 207-212
Materials Transaction, 2001,42(7):1176-1181
AZ91D magnesium alloy high temperature during compression microstructure, Chinese Journal of Nonferrous Metals, 2007, 17 (7), p.1041-1047.

Due to the possible changes of the production of raw materials and the replacement of cement varieties, we need to adjust the process parameters of poly carboxylic acid mother liquor and the ratio of the production of raw materials.The purpose of this study is through adjusting process parameters, to meet the requirements of commercial concrete adaptability.
The authors previous study showed that after adding the same dosage and type of mixed materials (such as fly ash and slag, etc.)
Acknowledgments This work was financially supported by Rizhao City Science and Technology Development Project (2013), Qingdao Institute of Technology Project (2014KY009).
References [1] Xiangyin MO,Yingjie Jing.New research progress and summarization of polycarboxylate-type high performance superplasticizer[J].Concrete,2009(3) [2] Xuejiang Huang,Muxia Zheng.Effect of side-chains structure of polycarboxylate superplasticizer on cement hydration and hydrated[J].Journal of Molecular Science,2007(23)
[4] Hui Chen,Tingting Zhao.Research and application of polycarboxylate slump retaining agent[J].Journal of Shanxi University(Nat.Sci.Ed.),2011(34):71-72

Besides, the introduction of shrinking-reducing functional groups to the ordinary PCE molecular structure can reduce the polymer solution surface tension, control the air content in the concrete and decrease the drying shrinkage of cement-based materials.
So it is necessary to research the performance and mechanism of SRPCA Materials and methods Materials Cement.
A and Series B were different SRPCA, which were produced by Jiangsu Bote new materials company and synthesized in the lab respectively.
[2] Qian Xiaoqian, Zhan Shulin, Fang Minhui et al, Negative Influence of Superplasticisers on Shrinkage and Cracking of Concrete, Journal of railway science and engineering. 1(2004) 19-25
[9] Zan Q, Wang C A, Huang Y, et al, Interface-layer and Interface in the Al2O3/ Ti3SiC2 Multilayer Composites Prepared by in Situ Synthesis, Materials Letters. 57(2003) 3826-3832.

Introduction Hydrogenated microcrystalline silicon(μc-Si:H) is a kind of complicate multiphase material,which is composed of amorphous silicon phase and micro crystal phase. μc-Si:H has excellent photoelectrical properties and stability, so be wildly used in photovoltaic field[1-3].
RF-PECVD is a key method for the preparation of high quality thin film materials in industry, and is also main method for preparation of μc-Si:H thin film.
At present, a lot of research has focused on effect of the parameters,such as RF power, substrate temperature, deposition pressure, silane concentration etc. on the quality of microcrystalline silicon thin films[4-6].But the thickness of thin films also has important effect on the structure and properties of thin film materials.This paper mainly studied the effect of the thickness on the structure and photoelectrical properties of μc-Si:H thin films.
Madan: www.sciencedirect.com [3] Amartya Chowdhury, Sumita Mukhopadhyay and Swati Ray: Solar Energy Materials & Solar Cells, 92 (2008)，P.385 [4] S.A.Filonovich, P.Alpuim and L.Rebouta : Journal of Non-crystalline Solids, 354(2008)，P.2376 [5] F.Edelman,A.Chack and R.Wei:Solar Energy Materials & Solar Cells, 77(2003),P.125 [6] B.Rech, T.Roschek and J.Muller:Solar Energy Materials & Solar Cells, 66(2001),P.267 [7] Chen Zhiming and Wang Jiannon: Basic material physics for semiconductor devices(Beijing, Science Press, 1999), p.327 [8] He Yuliang, Chen Guanghua and Zhang Fangqing:Amorphous Semiconductor physics(Beijing, Higher Education Press,1989) ,p.136 [9] Z.
Djessas: Materials Science and Engineering C , (2007)

This test method has high explanatory power of information on the response of materials to fire and is a suitable method for the prediction of the real behaviour of the wood materials finish [7].
The ignitability test provides the data for a complex understanding of fire-technical properties of these materials as well as the reactions of the tested materials to fire for the needs of the practice and to predict their behavior in real conditions.
References [1] E.Ružinská: Plastics and Coating Materials in Woodworking Industry (in Slovak).
Applied Mechanics and Materials, Vols. 501-504, p.2451-2454.
European Journal of Environmental and Safety Sciences.

Xu: Journal of Huazhong University of Science and Technology (Natural Science Edition) Vol. 35 (2007) p. 31 (In Chinese)
Wu: Journal of Building Materials Vol. 8 (2005) p. 250(In Chinese)
Xu: China Civil Engineering Journal Vol. 46(2013) p. 29(In Chinese)
Zhou: Journal of Wuhan University of Technology Vol. 31(2009) p. 5(In Chinese)
Huang: Journal of Dalian University of Technology Vol. 45 (2005) p. 422(In Chinese).

The highlighted problem of slab diaphragm reinforcing covered in this paper is solved by the Finite Element Method with the strength samples of structurally nonuniform materials using ANSYS software.
This element implements Willam-Warnke’s model [11] used for fragile structurally heterogeneous materials.
Lyu, Influence of T-type rib on flexural fatigue behavior of concrete composite slab with precast prestressed ribbed panel, Journal of Civil, Architectural and Environmental Engineering. 2(38) (2016) 11-20..
Gorbunova, The Influence of Cross Section Shape on Strengthening of Hollow Core Slabs, Materials Science Forum 931 MSF. 931 (2018) 24-29.
Hognestad, Yield-line theory for the ultimate flexural strength of reinforced concrete slabs, Journal Proceedings. 3 (49) (1953) 637-656.

The strength is determined from standard compressive test on three 150mm×150mm×150mm cubic.The material properties of steel bars were tested by the way stated in Chinese specification GB228-87 (Tensile Test Method of Metal).
Acknowledgments Thanks for the sponsoring of National Natural Science Foundation of China (Grant No. 50908118) and Natural Science Foundation of Ningbo City (Grant No. 2010A610079).
Journal of Structural Engineering, 2004, 11: 1820-1828 [3] Lie T T, Rowe T J and Lin T D.
Chinese journal of computational mechanics, 1997, 14(4): 443-453(in Chinese) [7] Wu Bo, Ma Zhong-cheng, Ou Jin-ping.
China civil engineering journal,1999, 32(2): 53-58(in Chinese)

Materials and methods Sampling.
B., Julián B., et al.: Science of the Total Environment.
Roselli: Journal of Radioanalytical and Nuclear Chemistry.
Liu et al.: Journal of Hohai University (Natural Sciences).
Š., et al.: Chemical Engineering Journal.

Upper layer Lower layer Thickness ratio Materials S（3/7） 3 7 0.43 Upper layer AC-13 Lower layer AC-20 S（4/6） 4 6 0.67 S（5/5） 5 5 1 At the same time, plate rut specimens were prepared in accordance with the composite structures in Table 1.Rutting tests were conducted to analyze the deformation properties of asphalt concrete and the relationship between rut deformation and mechanical parameters.
Journal of Wuhan University of Technology, 2007，29(11):14-17(in Chinese) [2] Q.
Material, Design, Construction, Maintenance, and Testing of Pavement.
Journal of Tongji University(Natural Science), 2009,37(11):1487-1491 [7] P.
Journal of Tongji University(Natural Science), 2007,35(2):187-192