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Materials and Methods Synthesis of Hydroxyapatite Powder (HAg) from Natural Gypsum Powder The natural gypsum rock was sorted and washed with water for removal of sand and other impurities.
Finaly, hydroxyapatite powder that synthesized from natural gypsum are safe and possible to use as raw materials for bone substitutes.
Skrtic, In vitro Cytotoxicity of Amorphous Calcium Phosphate Composites, Journal of Bioactive and Compatible Polymers, 20 (2005) 279-295
[3] Suchaneck, W. and Yoshimura, M., Processing and Properties of Hydroxyapatite Based Biomaterials for Use as Hard Tissue Replacement Implants, Journal Material Research, 13 (1998) 94-117
[6] R.M., German, Powder Metallurgy Science, 2th Edition, Metal Powder Industries Federation, New Jersey (1994)

Synthesis of Zeolite A from Mongolian Coal Fly Ash by Hydrothermal Treatment Ulambayar Rentsenorova*, Batmunkh Davaabalb, Jadambaa Temuujinc Laboratory of Materials Science and Technology, Institute of Chemistry and Chemical Technology, Mongolian Academy Science, Ulaanbaatar, Mongolia ae-mail: R.Ulambayar@gmail.com, be-mail: davaabalb@gmail.com, ce-mail: temuujin.mgl@gmail.com Keywords: Fly ash, zeolite, hydrothermal treatment, analcime, faujasite, hydroxyl-sodalite Abstract.
Materials and Methods 2.1.
However, these cubes had smooth edges and were likely to be covered with unconverted amorphous materials. 3.4.
El-Dessouky, A.K.Ghonaim, Two-step method for preparation of NaA-X zeolite blend from fly ash for removal of cesium ions, Journal of Hazardous Materials 154 (2008) 963–972
Samanta, Zeolite from fly ash: synthesis and characterization, Bulletin of Materials Science 27 (2004) 555–564.

Results and Discussion Characterization of Mesoporous Silica Materials.
The results reveal that the uniform mesoporous characteristic of the materials are preserved even though the grafting.
Fredickson, B.F. and Chmelka, G.D.: Science.
Arsuaga: Journal of Hazardous Materials.
Kawi: Microporous and Mesoporous Materials, Vol. 3 (2010), p. 494 [19] Yang, P.

Materials and Methods The following raw materials were used to develop the composition of heat-efficient concrete: cement CEM 42.5 H, sand, active granulated aggregate.
Conclusions Compositions of energy-efficient composites using active granulated aggregate from natural raw materials are developed.
Energy-efficient concretes for green construction, Research Journal of Applied Sciences. 9 (12) (2014) 1087-1090
Grinev // Construction materials, M. 10 (2009) 23-25
[11] Ogurtsova Y., Strokova V., Zhernovsky I., Maksakov A., Kozhukhova M., Sobolev K., Тhe efficiency of SIO2 based materials in granulated artificial aggregates, Materials Research Society Symposium Proceedings 22. (2014) 117-122

Materials and Methods Raw materials.
Malhotra, Role of supplementary cementing materials in reducing greenhouse gas emissions.
Siligardi, Sustainable mineral coating of alkali-resistant glass fibres in textile-reinforced mortar composites for structural purposes, Journal of composite materials 53 (2019) 4203-4213
Keppert, Freeze-Thaw Resistance of Cement Screed with Various Supplementary Cementitious Materials, Reviews on advanced materials science, 58(1) (2019) 66-74
Construction and Building Materials, 23(8) (2009) 2821-2828.

Materials and methods Study area The middle reach of the Yangtze River is 898 km long, has a drainage area of approximately 680,000 km2, and is the main spawning area of migratory fish.
Science Pro, Beijing, P.2–20 (1987).
[22] Duan XB, Chen DQ, Li ZH, Wang, et al. : Journal of Fisheries Science in China, VOL.15 (2008), P.523–532 (in Chinese)
[28] Dong ZR, Zhang J: Journal of Hydraulic engineering.
Special Publication of the Journal of Canadian Fisheries and Aquatic Sciences 106(1989)

Approaches appeared for the manipulation of sheet form objects with low rigidity such as foam sheet based on the integration of visual tracking and shape reconstruction with a physical modeling of the materials and their deformations as well as action learning techniques [6].
They examined the international research effort of automatic manipulation of flexible materials through a classification of workpieces in terms of their broad geometric shape, industrial applications, and individual processes.
The fabrics are non-homogeneous, non-isotropic and non-linear materials.
Nan, Industrial applications of automatic manipulation of flexible materials, Industrial Robot: An International Journal Volume 29, Number 5, 2002, pp. 434-442 [14] B.
Lin,Trajectory and orientation analysis of the ironing process for robotic automation, International Journal of Clothing Science and Technology, Vol. 16 Iss ½ pp. 215 - 226 [16] Panagiotis N.

Compaction is an important influencing factor that makes various structural materials of road embankment and surface sufficiently dense, and it becomes more and more important that effective detecting methods of the compaction degree are employed to monitor the quality of compaction.
Compaction operation is an important link that makes various structural materials of the road embankment and surface obtain sufficient density.
China science and technology press, Beijing, (2003)
Journal of Chongqing Jiaotong University Natural science , 4 (2008), pp. 643-646
Electronic Science and Technology University Press, Chengdu, (2005)

Key Engineering Materials 917 (2022): 207-227
International Journal of Engineering, Science and Technology, 3(9), 95-102
Materials Today: Proceedings, 44, 1511-1519
Materials Today: Proceedings, 33, 360-366
Materials Today: Proceedings, 45, 6083-6086

So this large-scale reform for the wall materials brings new challenges and opportunities.
Brick and tile are the oldest building materials in China.
Compared with other materials, it has very excellent insulation properties.
Thermal Evaluation of Several Configurations of Insulation and Structural Materials for Some Metal Stud Walls.
Journal of Structural Engineering, 2002, 128(1):32-38.