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Online since: September 2021
Authors: Cristian Ciobanu, Irina Aura Istrate, Gheorghe Voicu, Paula Tudor
Introduction In the rotary kilns of cement factories, the raw materials coming from the raw material mill are turned into clinker.
It grinds inside the clinker's necessary components (limestone, clay, marl), together with other materials (aluminum oxides, iron oxides).
Releases come from the physical and chemical reactions of raw materials and fuels.
Material and Method Romanian Portland cement is obtained in a dry process, in which the raw materials are ground and dried to raw flour in the form of fluid powder.
Font, Organic and inorganic pollutants from cement kiln stack feeding alternative fuels, Journal of Hazardous Materials, 158(2-3) (2008) 585-592
Online since: July 2011
Authors: Viacheslav A. Yermishkin, Pedro Alejandro Tamayo Meza, Pablo Schabes Retchkiman, Luis Armando Flores Herrera, Carlos F. Ordáz Yañez, Hammurabi Sierra
Radiation alters the physical properties of materials, such as electro-conductivity, deformation, mechanical properties, etc.
Internal nuclear reactions are totally excluded, and the phenomena related to the generation of Helium in irradiated materials and other the fission products; iii.
For materials in which the diffraction patterns show clear signs of textures, they slowly begin to disappear as a result of radiation. 5.
Beardmore: Molecular Dynamics Study of Particle Impacts with Carbon-Based Materials, Thin Solid Films, 272, pp. 255-270 (1996) [2].
Urals Section, Academy of Sciences (USSR).
Online since: December 2024
Authors: Vu Viet Linh Nguyen, Dinh Hung Le, Minh Khanh Hao Phung, Thanh Trung Nguyen
Natural fibers, such as cotton, coconut, sial, and WH, are sustainable materials for producing lightweight composites [1, 2].
They help reduce the use of synthetic materials and mitigate the greenhouse effect [1, 5].
WH exhibits a rich source of raw materials for this aquatic plant, with the highest percentage of cellulose content, significantly contributing to its enhanced thermal stability and tensile properties.
Materials and Methods Materials The WH plants were collected from a lake in Dong Tang Long, District 9, Ho Chi Minh City, Vietnam, with an approximate 50 cm length.
Version B of Vietnam Journal of Science and Technology, 65 (5) (2023) 31-36. https://doi.org/10.31276/VJST.65(6).31-36 [20] ASTM International - ASTM D882-18 Standard Test Method for Tensile Properties of Thin Plastic Sheeting, ASTM Int. (2018)
Online since: August 2016
Authors: Roland Golle, Wolfram Volk, Martin Feistle, Isabella Pätzold
Materials The tool material used for this study is a conventional high chromium, high carbon tool steel (material number 1.2379), which is commonly used in shear cutting processes.
Furthermore, the rough surface and micro-cracks, both caused by the shearing process limit the materials formability.
Using the process-parameters mentioned above, a decrease in strain by 5 % can be determined for both materials.
Stamping Journal FMA Publication, Rockford, IL, USA
N., Metallic materials - Sheet and strip - Hole expanding test, ISO 16630, ISO copyright office, Geneva, Switzerland, (2009)
Online since: January 2012
Authors: Zhen Bao Li, Yun Da Shao, Wei Jing Zhang, Bing Zhang, Mei Guang Fan, Shuang Ping Lin, Wen Jing Wang
The results also indicate that the stress redistributions of the hoops and the concrete sections are obvious, and long-lasting when specimens achieve the ultimate bearing capacity after the yield of the rebar and local damage of concrete materials, at this time the strain of the specimens develops a lot, especially stress - strain curves of specimens with high-strength hoop all show a wide and flat top.
Table 2 Mechanical properties of the steel Materials Longitudinal reinforcement Transverse hoops Diameter [mm] 20 16 14 10 7 9 Es [MPa] 177400 206200 181700 174700 191300 168700 Yield strength fy [MPa] 415 474 460 511 1115 1044 Ultimate strength fu [MPa] 570 651 677 641 1200 1092 Table 3 Mechanical properties of the concrete Materials Grade Ec [MPa] Axial compressive strength fc [MPa] Compressive strength fcu [MPa] Concrete C40 32463 43.4 47.9 The multi-function electro-hydraulic servo loading system with 40000kN capacity was used for the test of the monotonic axial compression, and force-displacement mixed control method was used as the loading rules.
Acknowledgements This work was financially supported by Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (2009BAJ28B01-06) and Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (2008BAE61B01).
(Natural Science Edition), Vol.41 (2009), p. 161, (in Chinese)
[6] Zhenbao Li, Wenjing Wang, Meiguang Fan and so on: Journal of Industrial Construction, Vol.
Online since: December 2014
Authors: Hui Ming, Chong Jian Ma, Ravi Naidu
Materials and methods Test materials.The tested soil is red mud.
While the growth of sweet sorghum can also provide raw materials for the exploitation of energy plants and has a good application prospect.
Analysis of comprehensive utilization of red mud in China.The  Chinese Journal  of Process  Engineering, 10: 264-270 (2010) [2].
Advanced Materials Research Vols. 807-809 pp 392-401(2013) [3].
Jiangxi Science, 29(6):724-728 (2011) (In Chinese)
Online since: May 2012
Authors: Dong Ping Zhao, Ling Li Jia
Region landscape should accept new material and new technologies, at the same time.
Modern landscape design neglects the regional and cultural difference, only pursues the graceful composition of geometry, and uses large numbers of expensive materials, it looks like be pomposity, because of its lack of the building emotional situation, and these landscapes can not cause the resonance of experiencer.
Soil, stone and other material can be used if they can be got conveniently, and the technology also is unconstrained.
Acknowledgements The author would like to thanks for the financial support by the humanities and social science key research base of Sichuan education department.
Meng: Journal of Anhui Agricultural Sciences.
Online since: June 2021
Authors: Yi Dan Zeng, Jin Zhang, Li Tong He
Numerical Simulation of Casting Deformation and Stress of A356 Aluminum Alloy Thin-Walled Frame Casting Yi Dan Zeng1,a, Li Tong He1,b, Jin Zhang1,c 1Inner Mongolia University of Technology, College of Materials Science and Engineering, Huhehaote,010051, China azyidan@sina.com, btongtong_helen@163.com, c1024364179@qq.com Keywords: Casting Deformation and Stress Simulation; A356 Aluminum Alloy; ProCAST software Abstract.
When σ>=σy,, the stress on the material is greater than the plateau stress, and the material undergoes viscoplastic deformation (see literature[9] for viscosity coefficient and index). 3 Casting Structure Characteristics The casting is a thin-walled frame casting, and the material is A356 aluminum alloy.
When the pouring speed is 1, 1.8kg/s, the maximum equivalent stress has reached the yield stress of the material.
When the pouring speed is 1.5kg/s, the maximum equivalent stress is always lower than the yield stress of the material.
Bai et al, Study on solidification contraction of aluminum alloys, Journal of Northeastern University (Natural Science). 36( 2015) 646-650
Online since: April 2012
Authors: Zong Shou Lin, Essossinam Beguedou, Hua Dong Shi
Effect of Polycarboxylate superplasticizer on Properties of Phosphogypsum-based cement LIN Zongshoua, SHI Huadongb and BEGUEDOU ESSOSSINAMc State Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology,Wuhan 430070, China azongshoulin@163.com, bshihuadong2005@163.com, c beguedou@163.com Keywords: phosphogypsum; polycarboxylate superplasticizer; carbonation; cement degradation Abstract: By using XRD, SEM and other experimental methods, some details of polycarboxylate superplasticizer on the hydration products and performance of phosphogypsum-based cement(PBC) can be obtained.
Experimental 1.1 Materials The PG used in this research was supplied by Hubei Huangmailing Phosphoric Chemical Group Corp. of China.
Table 1 Chemical composition(mass%) of raw materials Item Loss SiO2 Al2O3 Fe2O3 CaO MgO SO3 TiO2 F- Mn2O3 P2O5 Total GGBFS -0.30 32.65 16.05 0.46 35.87 8.74 0.04 0.82 0.42 0.01 95.33 PG 11.91 3.21 1.09 0.31 34.52 0.06 47.30 0.20   1.10 99.70 Clinker 0.41 22.30 5.04 3.36 65.60 2.32 99.03 1.2.
Testing methods Using the raw materials of Table 1, according the ratio of Table 2 porvided to ingredients, mix it 5min to get PBC, the physical and mechanical properties are shown in Table 2.
[4] Lidan Wang, Xuehong Huang.Influence on cement hydration process by adding polycarboxylic series, Journal of Fujian Normal University (Natural Science Edition), 2007(1):54~58
Online since: May 2010
Authors: Viktória Rontó, Jenő Sólyom, András Roósz, Erzsebet Nagy
Roósz1,d , 1 Hungarian Academy of Sciences-University of Miskolc, Materials Science Research Group, Miskolc-Egyetemváros H 3515, Hungary a femzsofi@uni-miskolc.hu, bfemvicki@uni-miskolc.hu, cfemsj@uni-miskolc.hu, dfemroosz@unimiskolc.hu, Keywords: Cu-based alloys, bulk metallic glasses, Cu-Hf-Al alloys Abstract.
The new types of Cu-Hf-Al alloys are suitable structural materials in the engineering industry and motorcar industry owing to their excellent mechanical properties, strength as well as corrosion- and wear resistance.
Inoue, Materials Transactions Vol. 44 No. 11 (2003) pp. 2346-2349 [2] A.
Inoue, W Zhang, Journal of Material Research Vol. 18 No. 6 (2003) 1435-1440 [3] A.
Saida, Materials Transactions Vol. 45 No. 4 (2004) pp. 1153-1162 [5] P.
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