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Wang, X.D.Li, H.Wang and Y.Shang: Chinese Journal of Materials Research Vol. 22(2008),p.292-294(In Chinese) [3]E.
Zhou: Materials Science & Technology Vol. 14(2006),p.301(In Chinese) [7]P.
Zhou: Materials China Vol. 30(2011),p.6(In Chinese) [21]Z.
Jia: Materials Science and Engineering A Vol. 489(2008),p.187-192(In Chinese) [22]Z.
Zhou: Material Science and Engineering A Vol. 528(2011),p.1944-1948(In Chinese) [23]R.

It consumes more than 25 % of the raw materials consumed in the EU [1].
Materials and Methods Three different materials are going to be analyzed for their use as aggregate in mortars: a natural aggregate, a ceramic waste and a concrete waste.
The chemical composition by XRF of the materials is shown in the next table.
It is proposed to carry out mortar mixes to compare the behavior of natural materials with the behavior of aggregate substitutions by recycled materials.
On the other hand, the ceramic materials are more brittle than concrete materials so ceramic aggregates waste will reduce the mortar strength.

The Analysis of the Interface States of Low-density Materials in the Forming Process Qiaoli Wang1, a, Yudong Zheng1, b*, Xin Liang2, c, Ying Ling2, d, Kun Qiao1, e, Yonglin Kang1, f, Guoming Zhu1, g 1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2Institute of Aerospace Materials and Technology Beijing, Beijing, China awangqiaoli@163.com, bzhengyudong@mater.ustb.edu.cn, cliangxbj@163.com, dkuangslian@vip.sina.com, e12208374@qq.com, fkangylin@mater.ustb.edu.cn *Corresponding author.
The interface of two low-density materials is bent in the forming process, which decreases the performance of materials.
The decay rates of frictional force of these two materials are △fa, △fb .
Adam: Journal of Materials Processing Technology Vol. 107(2000), p. 267 [7] A.
Ebrahimi: Materials and Design Vol. 31(2010), p. 493

Based on the gradient source representation of functionally gradient materials Qiang Li1,2, a , Mingqing Wu1,b 1Shandong Transport Vocational College, Shandong Weifang, 261206, China; 2School of Transportation Science and Engineering, Beihang University, Beijing, 100191, China; aljzylq@126.com; bwmq1977@qq.com  Keywords: functionally gradient material (FGM), grading source,function image Abstract.
Therefore, in the course of modeling, functional gradient materials are generally a one-dimensional entity model.
The information mathematical description of functionally gradient materials The material composition array: Define an array of for functionally gradient materials entity within the material composition of each.
References [1] CHENG Xiao-nong,DAI Qi-xun,ZHAO Yu-tao.et a1．Developmem of materials calculation design.journal of Jiangsu university,2003,24 (1): 15-18(in chinese) [2] Siu.Y K,Tan.S.T.”Source based” hererogeneous solid modeling.Computer Aided Design, 2002, 34 (1);41-55 [3] WU Xiao-jun,LIU Wei-jun,WANG Tian-ran.Heterogeneous material objects modeling for 3D CAD part.Chinese Journal of Mechanical Engineering,2004,40 (5):111-117.
(in chinese) [5] Zhou Manyuan,Xi Juntong,Yan Junqi.Modeling and processing of functionally graded materials for rapid prototyping.Jourmal of Materials Processing Thecnology,2004,146(3):396-402.

Ma: Materials Science and Engineering R, Vol. 29 (2000), p. 49
Suryanarayana: Progress in Materials Science, Vol. 46 (2001), p. 1
Alexandrov: Progress in Materials Science, Vol. 45 (2000), p. 103
Langdon: Progress in Materials Science, Vol. 51 (2006), p. 881
Ringer: Journal of Materials Science, Vol. 42 (2007), p. 1551

Functionally graded materials. finite element method Abstract.
Introduction Functionally graded materials (FGMs), as a kind of typical nonhomogeneous materials, have excellent thermomechanical properties and have absorbed great attention from many scholars in recent years.
The results indicate that the TSIF at the early stages of thermal shocks are dominant factors for fracture failure of the materials.
Paulino: International Journal of Fracture 107(2001), p. 73-98 [2] and Acta Mechanica Vol. 195(2008), p. 157-166 [3] L.C.Guo, N.Noda and L.Z.Wu: Composites Science and Technology.
Paulino: Journal of Applied Mechanics-Transactions of the ASME Vol. 72(2005), p. 351-364 [7] K.C.

Jalali, Journal of hazard materials 297 (2015) 127-133
Oreffo, Advance materials 25 (2013) 4069-4086
Thompson, B.E. van Dongen, Journal of archaeological science 39 (2012) 2506-2514
Goh, Journal of environmental Science and health B 43 (2008) 21-26
Borthakur, Current science 9 (2006)

Journal of Materials and Structure, 29-43
Journal of Materials and Structure, Volume 23, (134), 81-102
Journal of Archeological Science, VOL 37, 2346-2355
Journal of Materials and Structure, Volume 38, (134)., 771-780
Journal of Construction and Building Materials., 4338-4350

Particular focus has been given to fracturing heterogeneous materials.
Feyel, Multiscale FE2 elastoviscoplastic analysis of composite structures, Computational Materials Science, 16: 344–354, 1999
Brekelmans, Multi-scale constitutive modelling of heterogeneous materials with a gradient-enhanced computational homogenization scheme, International Journal for Numerical Methods in Engineering, 54: 1235–1260, 2002
Song, Multiscale aggregating discontinuities: A method for circumventing loss of material stability, International Journal for Numerical Methods in Engineering, 73: 869–894, 2008
Sluys, Coupled-volume multi-scale modelling of quasi brittle material, European Journal of Mechanics A/Solids, 27: 302–327, 2008

Meng: Metallic Functional Materials, Vol. 17 (2010) No.1, p.31.
Li: Journal of Henan Normal University (Natural Science Edition), Vol. 40 (2012) No.2, p.86.
Du: Materials Review, Vol.23 (2009) No.12, p.92.
Zhang: Journal of Central South University (Science and Technology), Vol.41 (2010) No.5, p.1668.
Peng: Journal of Central South University (Science and Technology), Vol.38 (2007) No.6, p.1106.