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And we now urgently need to do is to regulate the emissions of waste concrete and deepen the regeneration of abandoned properties of concrete, early introduction suited to China's production and use of recycled concrete specifications for the next construction cycle of recycled concrete and lay a solid theoretical foundation.
These factors ultimately lead to some performances of recycled aggregate is worse than natural aggregate.
Research shows that physical reinforcement method can greatly improve the frost resistance of recycled concrete, carbonation resistance and anti-penetration properties.
When the original concrete is waste, those differences of waste concrete in performance will lead to different performances of recycled aggregates, and such different performances of recycled aggregates will lead the physical or mechanical properties of recycled concrete to be different.
Little difference exit in between mixing matrix strength of recycled aggregate concrete and native concrete The affect which come from the age of the original concrete on the performance of recycled aggregates is weak. 28d and 111d three instars native concrete were broken each other by Changsheng Guo, etc. [9], and then different blocks of concrete for test had been made with recycled aggregates which came from those broken materials, they had made many test on these blocks to study the influences which are generated by the age of original concrete on the mechanical properties of recycled concrete.

The reasons for the increased interest in magnesium are driven by three key factors of importance to governments [5]: petroleum consumption, climate change and urban pollution.
For Automotive manufacturers these factors translate into the need to reduce vehicle weight.
However, cost is a major factor affecting the implementation of magnesium and despite the relatively higher cost of magnesium it has major manufacturing advantages which are related to ease of high pressure die casting large complex parts with thin sections.
• Additionally these projects develop databases of alloys and properties.
The Centre was established in April 2006 and undertakes magnesium research programs on surface properties, durability and mechanical behaviour.

Introduction Magnesium alloy has been used in the 3C and transportation industries as well as other structural applications because of high strength-to-weight ratios, anti-electromagnetic field properties and high thermal conductivity [1, 2].
It shows that most films mentioned above present good corrosion resistance and mechanical properties while remain many problems such as weak bonding between film and substrate, residual stress for further study and potential applications.
TiAlN film is characterized with excellent mechanical properties and good chemical stability [12].
The effect of different partial pressure of N2/Ar in magnetron sputtering process on the microstructure and properties of TiAlN films was explored by means of SEM, XRD and tests of microhardness, hydrophile.
Moreover, changes of the ratio of reactive gas may lead to a change in the adsorption-reaction dynamics during the deposition process, which is one of the factors that affect the film surface morphology and preferred orientation [15].

However, land management has several limiting factors: the available phosphate content, cation exchange capacity (CEC), and low population of functional soil organisms.
To know the dynamics of the chemical and biological properties of the soil due to the treatment of these materials is an essential aspect for strategy and planning in its proper application to improve the properties of Inceptisols.
On the other hand, the quality of phosphate rock depends on its mineralogical properties, such as carbon content, P content, and particle size.
The CRD was used with two factors.
Chemical properties of Inceptisols Cilembu.

The mechanical properties of CNTs reinforced composites depend on a lot of factors [7-9], among which the most important two of them are the distribution of CNTs and the interface between CNTs and matrix.
Ruoff, Tensile loading of ropes of single wall carbon nanotubes and their mechanical properties, Physical review letters. 84 (2000) 5552-5555
Li, Improvement of interface and mechanical properties in carbon nanotube reinforced Cu–Cr matrix composites, Materials & Desig. 45 (2013) 407-411
Agarwal, An analysis of the factors affecting strengthening in carbon nanotube reinforced aluminum composites, Carbon. 49 (2011) 533-544
Benson, Mechanical properties of nanocrystalline materials, Progress in Materials Science. 51 (2006) 427-556

The chemical composition and mechanical properties of the material are listed in Table 1.
Table 1 Chemical composition and mechanical properties of workpiece material Chemical composition wt.% ZrO2 < 96 Y2O3 > 4 Al2O3 < 1 SiO2 < 0,02 Mechanical properties Density ρ (g/cm3) 6.05 E-modulus E (GPa) 210 Fracture Toughness KIC (MPa m1/2) ~10 Vickers Hardness HV10 H (kg/mm2) 1200 Machine tools and Micro end mills.
They were affected by some factors such as tool wear or change of tool geometry.
Some other factors such as diamond coating delamination and cutting vibrations may also cause unstable milling process and result surface damages, which need to be confirmed in further study.
This may be caused by the changes of tool tip geometry or some other factors such as cutting vibration.

Although these methods for surface treatment improved aramid/matrix interfacial properties, they often lead to negative effects on the damaging of the mechanical strength, elevated production cost and complicated work procedures.
Zheng investigated the effects of SCCO2 fluid on the structures and properties of PMIA fiber[22,23].
During the supercritical carbon dioxide treatment, three important factors, including treatment temperature, pressure and time dramatically affect the interfacial adhesive performance between the reinforcing PPTA-pulp and the rubber.
Effect of supercritical carbon dioxide treatment on the dyamic mechanical properties of PPTA-pulp reinforced rubber composites.
DMA was conducted to investigate the dynamic mechanical properties of PPTA-pulp reinforced rubber composites.

Titanium is a metal with good mechanical properties, corrosion resistant and biocompatibility which makes it have a wide range of applications.
UFG structures have better mechanical properties.
It is clearly shows that the particles are metallurgically bonded, the major factor which affects the densification aided by diffusion is the temperature, pressure and time.
Bauri, Microstructure and Mechanical Properties of Titanium Processed by Spark Plasma Sintering (SPS), Metallogr.
Jayasankar, Microstructural and mechanical properties of Al 7075 alloy processed by Equal Channel Angular Pressing, Mater.

While the matrix material surrounds and supports the reinforcement by maintaining their relative positions, the reinforcements, on the other hand, pass on their extraordinary mechanical and physical properties to enhance the matrix elements [3].
Composite degradation factors that initiate or accelerate the deterioration of building materials, and components can be categorized into the following factors [13]: · Weathering.
Steel Shear Steel can shear under imposed loads, steel members to be designed to suit loading criteria Steel Buckling Steel can distort and fail under imposed loads when not laterally restrained deforming the appearance of the beam Table 2 summarises the degradation factors affecting the service life of building components.
This highlights the importance of such factors during the material design and manufacturing stages.
Composite materials degradation factors.

It has harmful influences on the properties of Ni-base superalloy, even if there is a trace amount of nitrogen in it.
Usually, the higher the nitrogen content, the more the microporosity and inclusions that made the mechanical properties of the Ni-base superalloys decreased.
The nitride inclusion remarkably affects the mechanical behavior of Ni-base superalloy.
The process of movement of nitrogen in liquid was the main controlling factor.
The process of movement of nitrogen in liquid was the main controlling factor.