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Many factors can affect the early strength of steam-cured concrete; the basis of research on pre-curing，adding materials and other factors [8], study on different experimental factors of water-cement ratio, sand ratio, fly ash and admixtures differently influenced on the early strength of steam-cured concrete by the method of orthogonal experiment.
JOURNAL OF NINGBO UNIVERSITY(NATURAL SCIENCE & ENGINEERING), 2010 23(4):112-116
JOURNAL OF BUILDING MATERIALS, 2003(2): 123-128
Resistance to chloride intrusion of concrete crued at different temperatures [J].ACI Materials Journal 1991, 88(1): 19-24
China Academy of Railway Sciences.

Materials with good bendability have good ductility [2].
Ragab, Ch.A Saleh: Evaluation of Bendability of Sheet Metals Using Void Coalescence Models, Materials Science and Engineering A Vol. 395 (2005), p. 102 [3] D.K.
Leu: Simplified Approach for Evaluating Bendability and Springback in Plastic Bending of Anisotropic Sheet Metals, Journal of Materials Processing Technology Vol. 66 (1997), p.9 [4] M.
Marciniak: International Journal of Mechanical Sciences Vol. 21 (1979), p.609 [6] A.
International Journal of Key Engineering Materials Vol. 410-411 (2009), p 611

Study on determining mechanical properties of the materials is less.
Ceraldi et al. (2001) found the strength of the ancient wooden materials is related with resistograph.
However, so far, there is no research about determining modulus of elasticity (MOE) of the materials with both stress wave and resistograph integrated.
The materials were cut into standard specimens first, and then stress wave transmission times, resistograph and densities were tested.
The final goal is to do some basic work on in-situ nondestructive test and evaluation of mechanical properties of ancient timber component materials.

Research Progress of Co-pyrolysis of Waste Plastics Contained Chlorine with Biomass Bin Han1, a and Wei Feng1, b, * 1School of materials science and engineering, Tianjin University, Tianjin, China, 300072 ahanbin@tju.edu.cn, *bweifeng@tju.edu.cn Keywords: waste plastic, chlorine, biomass, co-pyrolysis Abstract.
Different type raw materials of plastics and biomass, the experiments and facilities were presented.
The materials, experimental devices, co-pyrolysis characteristics and mechanism were introduced.
Raw Materials of Co-pyrolysis Many researchers studied the co-pyrolysis of PVC-containing plastics and biomass.
The materials of plastics mainly contain kinds of polyolefins, and the biomass mainly contains woods, nutshells, crops residue, etc.

Journal Of Materials Chemistry C, 2016, 4(32): 7520-7536
Journal of Materials Chemistry A, 2017, 5(24): 12068-12072
Nature Materials, 2003, 2(8): 528-531
Physica Status Solidi a-Applications and Materials Science, 2010, 207(2): 354-359
Journal of Electronic Materials, 2015, 44(10): 3637-3645

Materials and Testing Procedure The materials used were 99.9% pure-copper and 99.9% pure-aluminum.
We discussed the effects of pre-torsional deformation on the strength of the materials.
Swift H: Journal of Iron and Steel.
Itokazu: Journal of Testing and Evaluation.
Tanaka: Materials Strength.

Materials used as supporting elements for hybrid compost materials.
Series: Materials Science and Engineering.
Materials Science (MEDŽIAGOTYRA) vol. 22, 1, (2016): 40-43 [5] Pramono A, Sulaiman F, Suryana and Milandia A.
Damaging Prediction of Difficult-to-Work Aluminum Alloys during Equal Channel Angular Pressing Journal of Materials Engineering and Performance vol 21, 3 (2012): 287-297
Journal Applied Mechanics and Materials. vol 771 (2015): 252-256

Such stresses can cause plastic deformation and cracking near interface and affect the mechanical integrity of the bonded materials.
In order to reduce the residual stresses and the singular stresses field, many studies on the material combinations and the method of joining of bonded materials have been conducted theoretically and experimentally [2-3].
In this study, all the materials were assumed to be isotropic, linear elastic and plastic.
The X-ray method is one of the recommended nondestructive methods for measurement of residual stress in materials and has been widely applied [7].
Kamachi: Influence of shape and size on residual stress in ceramic/metal joining, Journal of Materials Science 22 (1987), p. 2702-2706 [8] Snejana Raevska: Reduction of the stresses introduced during the diffusion bonding of dissimilar materials, Journal of Materials Processing Technology 77 (1998), p. 50-53

Ultrasonic Effect on Refinement of Mg2Si and Mechanical Properties of in situ Al-Mg-Si Composites Dae-gyun KO 1, a , Geun-Hong Yu1,b, Jeong-IL YOUN1,c and Young-jig KIM 1,d 1School of Advanced Materials Science and Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, 440-746, Korea a kdk121@skku.edu, brmsghd1114@skku.edu, cyounj1@skku.edu, dyjk1122@skku.edu Keywords: high intensive ultrasound, Al-Mg-Si alloy, primary Mg2Si, refinement Abstract.
References [1] Chong Li, Xiangfa Liu, Guohua Zhang: Material Science and Engineering A497 (2008) 432437 [2] Q.D.Qin, Y.G Zhao, C.
Zhou: Journal of Alloys and Compounds 454 (2008), p. 142-146 [3] R.
Nemati: Material Science and Engineering A 490 (2008), P. 250-257 [4] Chong Li, Xiangfa Liu, and Yuying Wu: Journal of Alloys and Compounds 465 (2008) p. 145-150 [5] J.I.
Kim: International Journal of Cast Metals Research vol 21.

Introduction Composite materials are widely used in many fields, such as aviation, spaceflight, cars, architecture, chemical industry, shipbuilding etc because of their superior strength, stiffness, anti-fatigue and anti-knock over most metallic materials.
Journal of Dalian University of Technology, 1998, 38 (5)
Journal of Dalian University of Technology, 2004, 44 (5): 634-639
Journal of Hunan University (N atural Sciences Edition), 2000, 27 (1)
Composites Science and Technology, 1999, 59: 1247-1260