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The subject of the paper is to present additional knowledge and data on the sulfate attack of cement based materials.
The chemical compositions of these materials are shown in Table 1.
Acidic attack of cement based materials-a review.
Construction and Building Materials, 15(2001) :331-340 [3] N.Bouzoubaa, M.H.Zhang, V.M.Malhotra.
Journal of materials in civil engineering/July-August 2001

Introduction Magnesium alloys are the most attractive among the materials group because of their low density [1-3].
[2] Mordike B L, Ebert T: Materials Science and Engineering A Vol. 302 (2001), p 37
[3] Kinji Hirai, Hidetoshi Somekawa, Yorinobu Takigawa, Kenji Higashi: Materials Science and Engineering A Vol.403 (2005), p276
De Marco: Materials Science and Engineering A Vol.462 (2007), p393
Sato, and H.Kokawa: The Minerals, Metals & Materials Society and ASM International Vol. 41A (2010), p1016

Preparation and nonlinear optical property of triazole-based fluorene functional polymer Xiaoli Ji1,2, Shanyi Guang1, Xinyan Su1, Hongyao Xu1* 1 College of Material Science and Engineering & State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, 201620, China. 2 Department of Chemical Engineering, Anhui University of Science and Technology, Huainan, 232001, China *Corresponding author, hongyaoxu@163.com Keywords: Fluorene, Polytriazole, Click Chemistry, Nonlinear optical property Abstract.
Introduction With the rapid development of laser technology, organic materials with good nonlinear optical property have been prepared and used for optical communication, optical limiting, optical data storage, information processing, and so on[1-2].
The new organic materials with high third-order optical nonlinearities and their controllable preparation have been the challenge for their development and application of nonlinear optical materials.
Experimental Section Materials.
Vanstryland: Ieee Journal of Quantum Electronics. 760-769 (1990), 26

● The structure of the spiral blade parts The method which used in stamping springback parts for a certain type of cement mixer truck spiral blade, plate thickness 4 mm, material for QSTE420TM, as shown in figure 1 shows. figure AD, BC for section line, AB, CD is helix.
It is pointed out that die correction process is to reduce material part at the same time also had an increasing part of the material, the actual repair mode is not possible, the solution is the type for the ascension, make negative into zero or positive, to reduce the amount of material increase.
Tooling Design in Sheet Metal Forming Using Springback Calculations [J].International Journal of Mechanical Sciences,1992,34 (2):113-131
Journal of Plasticity Engineering,1996,13(4):27-33
Chinese Journal of Aeronautics,2002,23(3):285-288 [7] Yuanqing Jiang,Peijun Liu.

Wang: Grinding force control in an automatic surface finishing system, Journal of Materials Processing Technology, Vol.170(2005), p.367-373 [5] F.
Koç: Design of an automatic tool changer with disc magazine for a CNC horizontal machining center, International Journal of Machine Tools and Manufacture, Vol.37 (1997), p.277-286 [7] X.
Wang: An integrated CNC accumulation system for automatic building-around-inserts, Journal of Manufacturing Processes, Vol.15 (2013), p.432-443 [8] S.
Deshpande: Automatic CNC Part Programming for through Hole Drilling, Procedia Materials Science, Vol.5 (2014), p.2513-2521

Model Test 3.1 model sample production Instruments, ZBL-U520 nonmetallic ultrasonic detector, belong to Beijing ZBL Science and Technology Co.
ACI Journal of Structural Engineering, 2000,126(2):228-234
[4] Odile Abraham, Phillippe Cote.Impact-Echo Thickness Frequency Profiles for Detection of Voids in Tendon Ducts[J].ACI structural Journal,2002,99(3):239-247
Construction & Building Materials.2007,21(3):527-537
The Journal of Central South Forestry College [J]. 2006,26(6):44-48

This implies that motor cars, motorcycles and tricycles emit more than the accepted limits of the criteria air pollutants (HC, CO and CO2) into the environment which is detrimental to materials, plants, animals and human beings.
In IOP Conference Series: Materials Science and Engineering Vol. 413, No. 1 (2018) p. 012055
International Journal of Ambient Energy, 36 5 (2015) 235-241
Journal of the Brazilian Chemical Society, 24 3 (2013) 375-384
International Journal of Mechanical Engineering and Technology (IJMET), 9 9 (2018) 671-684.

Acknowledgements Financial support provided by National Natural Sciences Foundation, China (No. 41172274) is gratefully acknowledged.
Li: Chinese Journal of Geotechnical Engineering Vol. 25 (2003), p. 754 (In Chinese)
Cui: Canadian Geotechnical Journal Vol. 39 (2002), pp. 757–764
Hua: Applied Mechanics and Materials Vol. 90-93 (2011), pp. 1307-1312
Zhu: Advanced Materials Research Vols. 261-263 (2011), p. 1329

A Study on Liquid-Liquid Mixing in a Stirred Tank with a 6-Blade Rushton Turbine, Iranian Journal of Chemical Engineering. (2008) 5(4): 12-22
Computational studies of the pitched blade turbines design effect on the stirred tank flow characteristics, European Journal of Mechanics B/Fluids. (2010) 29:236-245
IchemE, 7(1994) 2:657-668 [7] Franco M., Giuseppina M., Davide P., and Alessandra P, Mixing time in high aspect ratio vessel with multiple impeller, Chemical Engineering Science, (2013) 101:712-720 [8] Zalc J.M., Szalai E.S., Alvarez M.M. and Muzzio F.J., Using CFD to understand chaotic mixing in laminar stirred tanks, AIChE Journal, (2002), 48;2124-2134
CFD Analysis of Circle Grid Fractal Plate Thickness on Turbulent Swirling Flow, Applied Mechanics and Materials. (2014) 466: 109-113 [10] Manshoor B, Nicolleau FCGA and Beck SBM.
Applied Mechanics and Materials. (2010) 390:111-115 [12] Hurst D. and Vassilicos J.C., Scalings and decay of fractal-generated turbulence.

Materials and Methods Materials.
Greger: Journal of Industrial Textile, Vol. 3l (2) (2001), p. 135-145 [4] Q.
Xia: Journal of Huzhou Teachers College, Vol. 28 (1) (2006), p.60 -63(In Chinese) [7] H.
Du: Journal of Northwest A&F University (Natural Science Edition), Vol. 30 (3) (2002), p.119-121 [8] Y.