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Due to the complexity of composition, severe regional difference, effective on using of construction waste will be affected by many factors.
Through the research of construction performance and mechanical properties of recycled concrete , the results showed that in the same mixture ratio conditions, recycled concrete shows reduced liquidity, good cohesion and water retention.
Usually level many factors such as experiment, using La (BC) orthogonal experiment design.
factors affect are: primary and secondary aggregate varieties, PNF expansion agent, air-entraining jianshuiji, poly (acrylic fibers; Above the optimal combination for A2 C3 B1D1.
Factors in primary and secondary analysis of four factors affect are primary and secondary aggregate varieties, PNF expansion agent, air-entraining Jianshuiji, poly (acrylic fibers; Aggregate varieties had the greatest influence among all the influence factors; For A2 C3 B1D1 experiments the optimal solution.

In contrast, stainless steel screens have many advantages such as precise punching size, excellent mechanical properties, and good corrosion resistance.
(3) Determination of mechanical properties.
Analysis and Discussion of Experimental Results Effect of Solution Treatment on Mechanical Properties of 20LH5 Stainless Steel.
Table 3 shows the effect of solution treatment under water cooling conditions on the mechanical properties of 20LH5 stainless steel sheets.
Thus, the precipitates will damage the bonding between grains, which has adverse effects on the mechanical properties of the material.

To realize dynamic properties oriented tolerance analysis and design of mechanical products, a data-driven based tolerance analysis method was proposed.
The static and dynamic stiffness and damping in the structure assembly joins can be changed to affect the product dynamic characteristics by adjusting the clearance and preload in the product assembly process.
Considering mechanical and electrical products in batch production generally accords with the normal distribution, and there are multiple factors but none decisive factor in the case.
To ensure the quality of the product and progress its assembly properties consistency, we put forward a theory that based on measured data mining the key factors of impacting on assembly performance accuracy, thereby changing the structure precision design to improve the consistency of its quality.
Using the same method, you can get the concept of other factors and the results are shown in Table 2.

The functional properties of electrodeposited Ni-Co alloy depend greatly on their composition, which should be strongly affected by deposition parameters such as chemical composition of electroplating bath, electrolyte pH, current density and temperature.
In this paper behaviours of mechanical and tribological properties of Ni-Co coatings with different wt. % cobalt on the current density of electrodeposited process which ranged 1 to 6 A/dm2 were documented and discussed.
According to the authors [4,6] a current density is one of the major factors which influence structure and morphology of the deposited coating.
Tribological properties rated pin-on-disc test using corundum balls with defined test conditions showed good wear resistant properties of Ni-Co coating; the thickness approx 30 mm coating to avoid sanding straight to the copper substrate.
Gavendová, Properties of Ni-Co alloy coating prepared from sulphate bath.

However, like other buildings, university buildings built for learning is also disposes to the forces of change released by various factors.
Nevertheless, all buildings deteriorate and decay with age as a result of various factors, including poor quality materials, bad workmanship, excessive usage, abuse and inadequate and poor maintenance.
The following provides the description of health risk and safety risk: a) Health Risk: Associated with human health effects; either direct or indirect exposure of building factors that can cause health risks.
It also demonstrates that there is a plethora of risk factors with the potential to affect the different dimensions of building performance.
Baldry, “Building Performance Evaluation In Higher Education Properties: Towards A Process Model,” in COBRA 1999, 1999

Rosa 1, b 1 Federal University of Rio Grande do Sul (UFRGS), Mechanical Engineering Department (DEMEC), Porto Alegre, RS, Brazil.
As consequence, it may affect the process performance by reducing the tool-life and causing damage to the machined surface finish.
The tool geometry is the set of geometric properties composed for edges, angles, corner radius (re) and so on [3] and its geometry affects the chip formation, power required, tool-life and finishing surface [4].
During turning processes the tool is subjected to wear, as it is exposed to a combination of abrasive, mechanical, chemical and thermal factors [4].
This affects the two geometries in a similar way (change of the cutting edge and folding of the chip) and cannot be considered as the primary factor in determining the selection cutting tool type.

In order to investigate the progressive failure process of brittle rock, the mechanical properties of red sandstone from southeast Shandong province were systemic studied.
Beside the stress concentration and dissipative effect, there are several other factors that have influence on the deformation and failure properties of rock.
Study on Mechanical Properties of Granites under High Pressure Conditions and its Constitutive Models[D].
Temperature and pressure under deep conditions and their influences on mechanical properties of sandstone[J], Chn J Rock Mech Engng, 2006, 25(6): 1177-1181.
The Time Effect and Main Influence Factors of the Splitting of Deep-seated Rock with Nonuniformities[J].

Deflection change analysis of bending steel beam under high temperature and uniform loads Yulai Han, Xiaole Zhang, Dewei Jiao, Zuohua Cai, Yan Li College of Aerospace and Civil Engineering, Harbin Engineering University Harbin 150001 China Emai:zhangxiaole0816@126.com Keywords: High temperature, Uniformly distributed load, Bending beam, Deflection change Abstract: In case a fire occurs in a steel structure building, materials properties and mechanical properties have undergone great changes, especially bending beam, its force complex than other members, charged with an important role in the structure, when the fire broke out the other members also prone to failure.
Introduction The mechanical properties of steel materials is very sensitive to temperature, the threat of fire of high temperature on steel structure building is very large, extremely easy to cause the serious damage of structure.
Fig.1 (c) of the steel beam separator analysis diagram, point A from the left of the cross section of the internal force moment x is: the force moment at x of the cross section from the left of the point A: （1） External torque： （2） Balance equation： （3） Under high temperature the axial temperature internal force (stress) of steel beam: （4） Where: is the temperature at both ends of steel beams at elevated temperatures, is the internal temperature of the steel beams at elevated temperatures, is the elastic modulus of the steel at a high temperature， is the cross-sectional area affected by fire members, is a cross-sectional moment of inertia, is the thermal expansion coefficient of the steel.
Table 1 Material parameters change of steel structure in different temperature Time Temperature Span deflection Bending midspan moment Strength reduction factor Elastic Modulus () 20 91.4 13.8 338681.4 1.0 202.61 40 162.8 14.1 338866.5 1.0 198.49 60 238.2 14.5 339108.6 1.0 193.35 80 304.6 15.0 339438.4 1.0 186.77 100 373.1 15.8 339914.2 0.96 178.05 120 442.5 17.0 340660.8 0.85 165.93 130 476.2 17.8 341219.7 0.78 157.92 135 493.5 18.4 341575.0 0.73 153.23 140 508.9 19.1 342000.9 0.69 147.97 145 531.2 19.9 342520.7 0.65 142.04 150 552.6 21.0 343169.5 0.61 135.29 155 577.9 22.3 344002.1 0.56 127.54 160 585.3 24.0 345109.3 0.52 118.57 165 602.6 26.5 346653.9 0.47 108.04 170 621.3 28.6 347981.4 0.43 100.44 Fig. 3.With heating time deflection change of bending beam at high temperature Conclusion This paper studied calculation method of the bending members span deflection and bending moment at mid span based on elastic theory, and according to the specific examples, the

(a) (b) Fig. 1 Deformations of multi-layer microstructures subjected to thermal loading (a) spherical shape with perfect geometry and material properties (b) ellipsoidal shape with imperfection of geometry.
As a result, forecasting of the structural bifurcation and understanding how it is influenced by various factors are so crucial for the design of MEMS structures and optimization of performance and reliability for MEMS devices.
Material properties were chosen as follows: AlE =70GPa, Alv =0.33, Alα =23.6×10-6/℃ and SiPolyE − =163GPa, SiPolyv − =0.22, SiPoly−α =2.6×10-6/℃.
Therefore, in the following analysis, we introduce three main imperfections to induce structural bifurcation with the purpose of investigating how it is affected by various factors.
Although three kinds of imperfections were taken into consideration, other ones such as nonuniformity in the layer thickness due to deposition process, anisotropy in other material properties can also play a role in the behavior of structural bifurcation.

The tensile properties of the joints were evaluated and correlated with the formation and presence of the FSW zone.
Using this process, it is possible to combine different materials having varying mechanical properties and corrosion-resistance characteristics, thereby achieving a noticeable reduction in cost and an overall improvement in manufacturing operations.
This was driven by the mechanical properties of the welded joints, such as, limiting tensile resistance.
Liu and co-workers [6] from their independent study concluded the tensile properties of the joints to be strongly affected by both the operating parameters and overall mechanical effectiveness of the FSW joints of the aluminum alloy blanks.
The technique has the advantage of producing welds with (a) low heat input, (b) a low degree of distortion, (c) a smaller grain size in the weld, (d) a narrow thermally-affected zone, and (e) properties closer to that of the parent metal.