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In order to make ensure that concrete has good anti-cracking property, volume stability and impermeability, three points of concrete's mix proportion design should be paid attention to: To use cementitious material system with low heat of hydration.
Besides, it should pay attention to key indexes such as the proportion of water quantity, degree of fineness and loss on ignition.
Thus, it is an important work and a key technique of controlling bulky concrete's quality to study how to control bulky concrete cracks.
Key Construction Techniques of the Main Project Construction techniques of pile foundation.
The control of cracks in engineering structures.

Surface Behaviors of ELID Ground Engineering Ceramics Jianyun Shen1, Weimin Lin 2, Hitoshi Ohmori2 and Xipeng Xu1 1 Provincial Key Research Lab for Stone Machining, Huaqiao University, China 2 Materials Fabrication Laboratory, The Institute of Physical and Chemical Research, Japan Keywords: Ceramic, ELID Grinding, Surface Behaviors Abstract.
Based on the analysis of material properties and detailed micro-observation of ground surfaces, it can be concluded that the material removal mechanism of engineering ceramic is closely related to its mechanical properties.
Therefore, it is necessary to understand the effect of grain size and morphology on the material removal mechanisms of engineering ceramics in grinding processes [1].
Bifano deduced a critical depth of cut for the ductile-to-brittle transition in grinding of brittle materials, and proved that it was closely related with the mechanical properties of brittle materials [6].
Fig.5 Smooth surface of Si3N4 ceramic Conclusions Difference in mechanical properties for engineering ceramic materials should lead to difference in the surface behaviours during ELID grinding process.

Acknowledgment Sponsored by the Chinese National Defense Technology Industry Bureau, and the Henan Key Technologies R&D Programme (Grant: 2010C460002) References [1] ZHOU Min.
Procedia Engineering. 2011, 23: 594-599 [2] Kwan H.
A 3-D point sets registration method in reverse engineering.
Research into the engineering application of reverse engineering technology.
Journal of Materials Processing Technology, 2003. 139: 472-475 [7] Maresca P.

Effects of Mechanical Stress on the in vitro Degradation of Porous Composite Scaffold for Bone Tissue Engineering Yunqing Kanga , Guangfu Yin b＊, Lin Luoc, Kefeng Wang d , Yu Zhange College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China a yunqingkang@hotmail.com, b＊corresponding author: nic0700@scu.edu.cn, cguitarboy6933@sohu.com, d fencal@163.com, e zhangyu19820923@163.com Key words: Bone Tissue Engineering; Scaffold; β-tricalcium Phosphate; Poly-L-lactide; Static Compressive Loading; Biodegradation Abstract.
In bone tissue engineering, porous scaffolds served as the temporary matrix are often subjected to mechanical stress when implanted in the body.
Tissue Engineering has been emerging as a valid approach to the current therapies for bone regeneration or substitution.
Scaffolds, one of the key issues in bone tissue engineering research, will act as a temporary matrix for cell proliferation and extracellular matrix deposition.
This can be seen from Fig.4B as a result of different content of β-TCP, that changes in mass loss rate of materials after degradation are different.

The modern tools of today's concurrent engineering (CE) based management are a wide array of instruments, plans, software, technical skills, human capabilities and resources.
Introduction Concurrent engineering (CE) is a work methodology based on the parallelization of tasks (i.e. performing tasks concurrently).
CE proposes a continuous flow of data, information, decisions, materials, tools, human skills and important management decisions that will eventually lead to a viable product which will bring profit.
Demoly, et al., Product relationships management enabler for concurrent engineering and product lifecycle management, Computers in Industry. 64, 7 (2013) 833–848
Vázquez-Bustelo, Concurrent engineering performance: Incremental versus radical innovation, International Journal of Production Economics. 119, 1 (2009) 136-148

Mold material selection and development trends Xiao Sun Xinjiang Polytechnic College, Urumqi, Xinjiang 830091, China XJsunxiao@sina.com Key words: The mold working under normal temperature; cavity model; corrosion has been difficult; special ceramic engineering Abstract: Based on the molding parts work environment analysis to identify the main factors affecting the life of the mold, mold analysis of the choice of principles common to think about the future development trend of the mold.
Appropriate material is required for mold.
Material used in China Currently, material can be divided into 2 parts: mold steel and new materials.
All of them gives it advantage. engineering ceramics is new materials.
It has good abrasive resistance and high temp, which is suitable for mold materials.

The development of Macroporous PEG-based Hydrogel Scaffolds for Tissue Engineering Applications Zuratul Ain Abdul Hamid1,a*, Hanafi Ismail1,b, Zulkifli Ahmad1,c 1School of Materials & Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia asrzuratulain@usm.my, bihanafi@usm.my, czulkifli@usm.my Keywords: hydrogel scaffolds; tissue engineering; crosslinked hydrogel; pores morphology Abstract.
In tissue engineering field, porosity of scaffolds play key role for cell attachment, grow and proliferation consequently help in regeneration of new tissues.
Regardless of the type of materials the scaffolds are derived from, they need to meet several criteria for use in tissue engineering applications.
Materials & Experimental Materials Poly(ethylene glycol) diglycidyl ether (PEGDGE, Mn = 526 Da) were purchased from Aldrich and used as received.
U., Topics in Bio-Mechanical Engineering.

ALIM and TADEUSZ BAKa Solar Energy Technologies, Western Sydney University, Penrith, NSW 2571, Australia aT.Bak@westernsydney.edu.au Keywords: Oxide semiconductor; Segregation; Defect engineering Abstract.
On the other hand it is well known that oxide materials, which are almost free of defects, are not reactive [44-46].
Therefore, search for oxide semiconductors with optimal performance in solar energy conversion should be based on the application of defect engineering in processing of photocatalysts with controlled defect disorder.
Such approach has been considered for TiO2-based materials [46].
Sigmund, Defect chemistry and defect engineering of TiO2-based semiconductors for solar energy conversion.

Ahmari et al[7] fabricated eco-friendly materials with compressive strength of 35 MPa using copper mine tailings as raw materials.
Construction & Building Materials. 96 (2015) 353-359
Key Engineering Materials. 599 (2014) 61-65
Colloids & Surfaces A Physicochemical & Engineering Aspects. 269(1-3) (2005) 47-58
Key Engineering Materials. 711 (2016) 95-102

CECA is used to identify the key disadvantage of the engineering system, accomplished by building cause - effect chain of disadvantages that link the target disadvantage to its fundamental causes.
· Use of composite materials.
Composite materials can be used to create seals and other components that are both strong and lightweight.
With the combination of principle of composite materials and asymmetry – a new idea was conceptualised wherein the engineering system had final their components that could perform all the desired functionality.
Advanced Materials Research 2013;712–715:2966–9 [6] R.