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(t); =consumption of building materials industry in the core of city m in the end of planning.
(t); = consumption of building materials industry in buffer of city m in the end of planning.
(t); =carbon emissions of building materials industry in urban agglomerations in the end of planning.
Zhang: Journal of Arid Land Resources and Environment.
Li: Geography and Geographic Information Science, Vol. 26 (2010), p. 76 [5] G.H.

Introduction One of the oldest techniques for processing metals with the aim to shape and join various materials is forging [[] O.D.
Wadsworth, Ancient blacksmiths, the Iron Age, Damascus steels, Journal of Materials Processing Technology 117 (2001) 347 - 353. ].Damascus steels are fabricated by forging iron and ferrous alloys resulting in a final product with versatile microstructures and thus a combination of the mechanical properties of the individual materials.
Haubner, Characterisation of steel composites produced by the Damascus technique, Materials Science Forum, 825-826 (2015) 852 - 859. ].

The Establishment of Comprehensive Evaluation Model of Manufacturing Process Resources and Environmental Attributes Based on Artificial Neural Network The entire manufacturing process that transforms raw materials into finished products is shown in Fig. 1.
Input the raw materials, auxiliary raw materials (such as cutter, cutting fluid, etc.), energy (electricity, etc.), after the course of roughcast shaping, parts machining, materials modification and processing, assembly, to produce qualified products or parts, at the same time, solid waste such as waste products, by-products and emissions such as waste gas, waste fluid, noise, vibration, radiation will generate during the production process, which is harmful to the ecological environment, human health and safety, workshop environment and manufacturing safety.
The resources and environmental parameters involved in manufacturing process can be divided into: the consumption of raw materials and auxiliary raw materials, energy consumption, gas waste, liquid waste, solid waste, other pollution (noise, radiation, etc.), occupational health and safety hazards, each classification guidelines has specific targets, the frame structure as shown in Fig. 3.
Zhang: Green Manufacturing Theory and Technology (Science Press, China 2005)
Wang: Journal of Industrial Engineering/Engineering Management, (1995), pp. 26-33.

Maybe those materials are the revenge of the ceramic on the cement1 Fig.
For instance, phosphate-based cements have potential as bio-materials and cementitious materials open new perspective on waste (in particular radioactive waste) management.
Suda: "Hydroxyapatite and Related Materials," Ed.
Yoshimura: Solid State Science, ,1 [ 1-2] 183-188 (200 I) [21] M.
Yosl1imura, et al.: Chemistry of Materials, lQ [8] 2183-2 188 ( l 998) (22] S-W.

One approach is to recycle materials used in road construction.
In addition, these excavated pavements can be recycled, saving valuable landfill space needed for unloading materials.
However, by using polymer modification, the bond between materials is significantly increased, resulting in better fatigue performance of rejuvenated RAP materials.
Series: Materials Science and Engineering 660 (2019) 012046 IOP Publishing doi:10.1088/1757-899X/660/1/012046
Fatigue Performance of Recycled Hot Mix Asphalt: A Laboratory Study, Advances in Materials Science and Engineering, vol. 2017

Diouri1,e 1Laboratory of Applied Chemistry of Materials, Faculty of Science, Mohammed V University in Rabat, Morocco anissrineelfamii@gmail.com, bhind.agourrame@gmail.com, cnkhachani@gmail.com, dalibkhr100@gmail.com, eabdeljebbar.diouri@gmail.com *Corresponding author Keywords: Limestone; Fly ash; Grinding; Composite cement; Mortars; Mechanical behavior Abstract.
The development of the range of Portland composite cements using the available mineral raw materials as supplementary cementing materials is interesting for the Moroccan cement industry.
The chemical composition of the used materials; clinker, gypsum, limestone and FA, is shown in Table 1.
All the materials of each type of cement are ground together, up to 4.3% retained at 80 μm.
EFFECT OF FLY ASH ON PHYSICAL AND MECHANICAL PROPERTIES OF MORTAR, THE UNIVERSITY OF DANANG, JOURNAL OF SCIENCE AND TECHNOLOGY, VOL. 17, NO. 6, 2019 [14].

Orthogonal experiment designs Experimental materials. (1) The Cement: PC 32.5 compound portland cement, produced by Huaxin Cement Company Limited, Hubei.
At the same time under the reference of The United States Materials Association Standards (ASTM Cl0l8-98)[8], values of residual strength R5,10, R10,20 are calculated.
Acknowledgements This research is supported financially by National Natural Science Found under the project number of 50908182, and by Wuhan Technology Research Fund under the project number of 200810321150.
Journal of Building Materials. 2005, (3): p.250 ~ 255. in Chinese [4] Hongping Qian, Haoping Gong, Wei Sun.
Guangdong Building Materials. 2006 in Chinese [7] Steel Fiber Reinforced Concrete Test Method (CECS13:89).

Effects of Texture on Tensile Property of Extruded AZ31 Magnesium Alloy Investigated by Acoustic Emission Chuankai Suna, Hongyun Luob and Zhiyuan Hanc Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing, 100083, China asunchuankaisdu@126.com, bluo7128@163.com, chzy19851227@163.com Keywords: AZ31 magnesium alloy, Texture, Tensile property, Acoustic emission.
Nominal compositions of materials(wt%) Alloy Al Zn Mn Fe Cu Si Ni Mg AZ31 3.5 0.91 0.44 0.003 0.00096 0.027 0.00037 Bal.
From these pole figures, it can be recognized that the strong texture of formed in this material.
Anand, A constitutive model for hcp materials deforming by slip and twinning: application to magnesium alloy AZ31B, Int.
Li, Tensile-compressive yield asymmetry and microstructure evolution during deformation of coarse-grained AZ31D magnesium alloy, Chinese Journal of Materials Research, 21 (2007 )38-42

Experimental materials and test method Experimental material 1) Cement: Hailuo Brand P.O42.5; 2) Gravel: 5~10mm continuous grading pebble, good grading; sand: medium sand, good grading; 3) Additive: Polycarboxylate superplasticizer, MNC-NC thickener, Sodium gluconate retarder; 4) Active mineral admixture: Class I fly ash, density is 2200Kg/m3; 5) Water: plain tap water.
In the experiment, ratio of water to binding material ≤0.40, sand percentage 40%—50%.
Acknowlegements This work was financially supported by the Teaching Innovation (JXJG-12-7-20) and the Science Plan Program (DB201311176) of Jiangxi Provincial Education Development.
Ge: Journal of Nonh China Institute of Water Conservancy and Hydroelectric Power (In Chinese), Vol. 1 (2012), p.37 [4]V.
Uysal: Construction and Building Materials, Vol. 1 (2011), p.321 [6] X.

One is the cladding materials are pre-placed, it has a poor utilization efficiency of powder particles.
The second is the cladding materials are delivered by side and coaxial powder-feed system.
Chemical compositions of the materials are summarized in Table 1.
Pashby: Journal of materials Processing Technology, Vol. 138 (2003), pp.411-416
Zhou: Materials Science and Engineering-A, Vol. 360 (2003) No.1-2, pp.18-25.