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Online since: May 2012
Authors: Wei Guo, Hong Gen Qin, Qian Tian, Zhi Hua Fei
The Effects of Water-reducer on early-age plastic
Shrinkage of Concrete
Hong-gen Qin1.a,Zhi-hua Fei 1.b, Wei Guo 1.c, Qian Tian 2.d
1Jiangsu Key Laboratory of Construction Material, Southeast University, Nanjing 211189,China
2Jiangsu Institute of Building Science, Nanjing 210009,China
aqinhonggen@126.com,b Feizhihua2002@163.com,cguowei_133909@126.com,
dTianqian17@hotmail.com
Keywords: water-reducer; plastic shrinkage of concrete; plastic settlement; evaporation rate; capillary pressure
Abstract.
Materials and concrete mix proportion 1.1 Materials Cement: P•II 52.5, produced by Jiangnan-Onoda Cement.Co.
Research for the contraction and its mechanism of low water-binder ratio cement-based materials with high-content mineral admixtures, Nanjing, Southeast University, 2005
[4]C.W.Miao, Q.Tian, J.P.Liu, W.Sun.Journal of the Chinese Ceramic Society, Vol.35-4(2007) pp.509-516 [5] Q.Tian, Y.J.Wang, J.P.Liu, C.W.Miao.
“An Initial Curing Procedure Based on Pore Water Under Pressure Measurement of Cementitious Materials” in Proceedings for the 13th fiber reinforced concrete and the second conference cross-straits three concrete technology seminar,Oct.28-29,2010, pp.659-667.
Materials and concrete mix proportion 1.1 Materials Cement: P•II 52.5, produced by Jiangnan-Onoda Cement.Co.
Research for the contraction and its mechanism of low water-binder ratio cement-based materials with high-content mineral admixtures, Nanjing, Southeast University, 2005
[4]C.W.Miao, Q.Tian, J.P.Liu, W.Sun.Journal of the Chinese Ceramic Society, Vol.35-4(2007) pp.509-516 [5] Q.Tian, Y.J.Wang, J.P.Liu, C.W.Miao.
“An Initial Curing Procedure Based on Pore Water Under Pressure Measurement of Cementitious Materials” in Proceedings for the 13th fiber reinforced concrete and the second conference cross-straits three concrete technology seminar,Oct.28-29,2010, pp.659-667.
Online since: January 2014
Authors: Mei Li
“Cultural routes” content contains not only tangible material also non-material intangible cultural heritage, which have both individual value, but also cultural value as a whole line, as well as the value of carrying the natural environment and ecological system.
The tangible heritage is fragile in “Cultural routes”, and the preservation of material heritage is facing some difficulty.
The inner spirit of cultural heritage, unique skills and other intangible heritage passed down, so following the historical context to make the material remains repair or restoration is possible, in this sense material remains will be renewable.
Journal of Tonghua Teachers College, 2007,28(3):1-5
Jiangxi Social Sciences, 2008(4):201-205.
The tangible heritage is fragile in “Cultural routes”, and the preservation of material heritage is facing some difficulty.
The inner spirit of cultural heritage, unique skills and other intangible heritage passed down, so following the historical context to make the material remains repair or restoration is possible, in this sense material remains will be renewable.
Journal of Tonghua Teachers College, 2007,28(3):1-5
Jiangxi Social Sciences, 2008(4):201-205.
Online since: October 2013
Authors: Chong Wang, Almir Barros Da Silva Santos Neto
The present work gives a general suggestion for toughening in brittle materials through addition of reinforcement particulates
Essentials of Boundary Element Formulations
For an elastic body with volume W and boundary G subjected to a boundary traction t(x), the displacement u(X’)can be, in the absence of body forces,determined as:
(1)
where for an internal source point X’ÎW; and for a source point X’ÎG on a smooth boundary while the second integration is a Cauchy principal-value integration.
is the equivalent mode I stress intensity factor for the crack tip in the composite; is that in the pure matrix phase material.
Acknowledgements The author Wang acknowledge the National Council for Scientific and Technological Development (CNPq, an agency linked to the Ministry of Science and Technology, Federal Republic of Brazil)for its finance aid (Grant Numbers: 501660/2009-7) in this work.
Sáez:DualBEManalysis of differentcrackface boundary conditions in 2D magnetoelectroelastic solids, European Journal of Mechanics - A/SolidsVolume 31 (2012), p.152
Okamura: J integral of a mixed mode crack and its application,in:Proceedings of the Third International Conference on Mechanical Behavior of Materials Vol.3, Pergamon, Oxford (1980)
is the equivalent mode I stress intensity factor for the crack tip in the composite; is that in the pure matrix phase material.
Acknowledgements The author Wang acknowledge the National Council for Scientific and Technological Development (CNPq, an agency linked to the Ministry of Science and Technology, Federal Republic of Brazil)for its finance aid (Grant Numbers: 501660/2009-7) in this work.
Sáez:DualBEManalysis of differentcrackface boundary conditions in 2D magnetoelectroelastic solids, European Journal of Mechanics - A/SolidsVolume 31 (2012), p.152
Okamura: J integral of a mixed mode crack and its application,in:Proceedings of the Third International Conference on Mechanical Behavior of Materials Vol.3, Pergamon, Oxford (1980)
Online since: September 2013
Authors: Qian Dong, Da Lin Qian, Cheng Hua Li, Hai Bo Fan
Specifically, factors affecting are human, material, environment and management.
Accidents in road transportation of dangerous goods are caused by employees, materials, environment and management, as well as their interaction.
Materials refer to vehicles and accessories, and packing goods.
(2) “Material factor M”, as the material basis of accidents occurred, mainly refers to the material objects controlled and managed in the transit, including a variety of machinery and equipment as well as the dangerous goods.
References [1] Yuanchun Yan, Haoxue Liu: China Safety Science Journal. 2010, 20(9):32-37, in Chinese
Accidents in road transportation of dangerous goods are caused by employees, materials, environment and management, as well as their interaction.
Materials refer to vehicles and accessories, and packing goods.
(2) “Material factor M”, as the material basis of accidents occurred, mainly refers to the material objects controlled and managed in the transit, including a variety of machinery and equipment as well as the dangerous goods.
References [1] Yuanchun Yan, Haoxue Liu: China Safety Science Journal. 2010, 20(9):32-37, in Chinese
Online since: December 2024
Authors: Ida Royana Tambunan, Heru Purnomo
The materials used in this bridge are concrete, steel reinforcement, and steel.
It is very important to have information regarding the materials properties.
Those material properties are put in as material data in structural modeling.
Material Properties.
A., Design of Highway Bridges Based on AASHTO LRFD Bridge Design Specifications, Canada: A Wiley-Inter Science Publication, 1997
It is very important to have information regarding the materials properties.
Those material properties are put in as material data in structural modeling.
Material Properties.
A., Design of Highway Bridges Based on AASHTO LRFD Bridge Design Specifications, Canada: A Wiley-Inter Science Publication, 1997
Online since: September 2016
Authors: Nilkanta Barman, Himadri Chattopadhyay, Sudip Simlandi
Introduction
Since the last few decades, semisolid forming (SSF) is a developing technology and gaining ever increasing attention from both the materials scientists and production engineers for near net shape and cost effective products.
It is observed from the available literature that the theoretical models for such semisolid materials are less developed and the models available are mostly established from experiments.
Adequate knowledge on the properties of the semisolid materials during cooling is necessary for successful execution of the method.
Entov, Thixotropic rheology of semisolid metal suspensions, Journal of Materials Processing Technology. 110 (2001) 164-176
Mallik, Manufacturing Science, Second Edition, East-West Private Ltd., New Delhi, 1997.
It is observed from the available literature that the theoretical models for such semisolid materials are less developed and the models available are mostly established from experiments.
Adequate knowledge on the properties of the semisolid materials during cooling is necessary for successful execution of the method.
Entov, Thixotropic rheology of semisolid metal suspensions, Journal of Materials Processing Technology. 110 (2001) 164-176
Mallik, Manufacturing Science, Second Edition, East-West Private Ltd., New Delhi, 1997.
Online since: May 2022
Authors: Francesco La Via, Riccardo Reitano, Laura Meda, Antonio Trotta, Miriam Parisi, Alessandro Meli, Annamaria Muoio
Introduction
Silicon carbide (SiC) is a wide bandgap semiconductor material with a rigid stoichiometry of Si:C=1:1.
Improvements in SiC wafer growth processes and the good quality of the material, with a low defect density, makes this material competitive with Single-Crystal Diamonds (SCD) detectors, currently used in this field.
Maboudian and e. al., “Advances in silicon carbide science and technology at the micro-and nanoscales,” J.
La Via, “A novel micro-Raman technique to detect and characterize 4H-SiC stacking faults,” Journal of applied physics, vol. 116, p. 163506, 2014
La Via, “Epitaxial Growth and Characterization of 4H-SiC for Neutron Detection Applications,” Materials, vol. 14, no. 976, 2021
Improvements in SiC wafer growth processes and the good quality of the material, with a low defect density, makes this material competitive with Single-Crystal Diamonds (SCD) detectors, currently used in this field.
Maboudian and e. al., “Advances in silicon carbide science and technology at the micro-and nanoscales,” J.
La Via, “A novel micro-Raman technique to detect and characterize 4H-SiC stacking faults,” Journal of applied physics, vol. 116, p. 163506, 2014
La Via, “Epitaxial Growth and Characterization of 4H-SiC for Neutron Detection Applications,” Materials, vol. 14, no. 976, 2021
Online since: September 2006
Authors: Ronald Guillén, Sylvain Fréour, Frederic Jacquemin
A self-consistent model based on
Kröner [3] and Eshelby [2] hypotheses is extended to the hygroscopic loading of composite
materials in order to determine localization of the stresses in the constituents of each ply: the matrix
and the fiber.
These constituents define the microscopic scale of the material.
The hygro-elastic behaviour of the material satisfies: (((( ))))α∆Cαααααααααααααααα ββββ−−−−εεεε====σσσσ :L , (1) where α replaces the superscripts I, f or m.
Hill: Journal of the Mechanics and Physics of Solids Vol 15, (1967), pp. 79-95
Morris: International Journal Engineering Science, Vol 8, (1970), pp. 49-61
These constituents define the microscopic scale of the material.
The hygro-elastic behaviour of the material satisfies: (((( ))))α∆Cαααααααααααααααα ββββ−−−−εεεε====σσσσ :L , (1) where α replaces the superscripts I, f or m.
Hill: Journal of the Mechanics and Physics of Solids Vol 15, (1967), pp. 79-95
Morris: International Journal Engineering Science, Vol 8, (1970), pp. 49-61
Online since: October 2012
Authors: Yuan Peng Liu, Zhen Hua Wen, Xin Yin
This method makes use of the physical characteristics, such as the sensing distance, material deformation to transform non-electrical signals into electrical signals and then output them.
The transform accuracy between different types of signals always relies on the characteristics of sensitive materials of sensors.
This requires that the sensitive materials of sensors have good linear features or follow a certain rule within detection range, which is an absolutely ideal state hard to be achieved by sensor technology.
Journal of Nanjing University of Aeronautics & Astronautics.
Journal of Mechanical Strength.Vol. 27(2005) No. 4, pp. 492-497 (in Chinese).
The transform accuracy between different types of signals always relies on the characteristics of sensitive materials of sensors.
This requires that the sensitive materials of sensors have good linear features or follow a certain rule within detection range, which is an absolutely ideal state hard to be achieved by sensor technology.
Journal of Nanjing University of Aeronautics & Astronautics.
Journal of Mechanical Strength.Vol. 27(2005) No. 4, pp. 492-497 (in Chinese).
Online since: December 2012
Authors: Hai Yue Zhang, Peng Li, Fan Jia, Ying Wei, Man Liu
Extraction, purification, structural analysis and antioxidant activity of extracts from Alliums cepa L. var. agrogatum Don
HAIYUE Zhang1, a,*, PENG Li1, b, FAN Jia1, c, MAN Liu1, d, YING Wei1, e
1College of Chemical and Life Science, Changchun University of Technology, Changchun 130012, PR China.
However, there have very few amounts of naturally occurring flavonoids in plant material.
Materials and methods Materials The ACAD were purchased from markets in China.
Journal of Food and Chemical Toxicology Vol. 42(2004), P. 659-666
African Journal of Biotechnology Vol.10 (46) (2011), P. 9428-9437.”In Chinese”
However, there have very few amounts of naturally occurring flavonoids in plant material.
Materials and methods Materials The ACAD were purchased from markets in China.
Journal of Food and Chemical Toxicology Vol. 42(2004), P. 659-666
African Journal of Biotechnology Vol.10 (46) (2011), P. 9428-9437.”In Chinese”