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Analysis and Comparison on Mechanical Properties between Full-Graded and Wet-Screened Concretes Shi Hua Zhou 1,2,a, Hua Quan Yang 1,2,b and Yun Dong 1,2,c 1Changjiang River Scientific Research Institute, Hubei China 2Center on Water Engineering Safety and Disaster Prevention of the Ministry of Water Resources, Hubei China azhoush@mail.crsri.cn, byanghq@mail.crsri.cn, cDongyun@mail.crsri.cn Key Words: Full-Graded Concrete; Wet-Screened Concrete; Mechanical Properties Abstract: Based on typical hydraulic engineering, difference of performances between full-graded and wet-screened concrete was studied.
This directly affects physical and mechanical properties, deformation performances and durability of concrete, which together with the size effect of specimen and the gradation effect of aggregates, cause the discrepancy between experimental results and actual full-graded dam concrete [2-3].
Based on several typical hydraulic engineering, this paper investigates mechanical properties of full-graded mass concrete, analyzes the difference of properties between full-graded concrete and wet-screened concrete, providing the technical support for the design and construction of mass concrete.
Moreover, compared with full-graded concrete, wet-screened concrete has larger quantity of cementitious materials that is the main factor to affect tensile strength of concrete, leading to a higher splitting tensile strength.
Experimental Study on Full-graded Concrete Properties with Phosphorus Slag Power [J].Journal of Yangtze River Scientific Research Institute, No.3, Vol. 26(2009), p:53-56.

The results have shown that current, velocity and load are important factors to affect the frictional wear properties of C/C composite with electric current.
Comparing with traditional friction couples, the contact behavior of current-carrying friction couples is affected by the action of electric field and arc due to the introduction of electrical factor into tribology process.
The sliding plate should meet series of properties such as: good electric conduction property, good antifriction property and wear resistance property, lower damage to contact wire, higher impact resistance and ductility, light mass and low price, and so on.
C/C composite is suitable for making pantograph sliding plate owe to it’s advantages of low density, good wear resistance(low coefficient of friction), good electrical and thermal conductivity and good mechanical properties under high temperature,etc[4~6].
Conclusion This paper studied the frictional wear properties and main wear mechanism of C/C composite with electric current.

Through selecting the proper ratio of fly ash, cement, water, and right amount of sodium silicate additives, the author made high content of fly ash cement wet shotcrete materials, and tested their main physical properties, mechanical properties and technical performance, a type of environment-friendly underground wet shotcrete is developed.
The Ratio of Wet Shotcrete Support Materials Fly ash, sodium silicate and cement are chosen as the main raw materials, and clean water is chosen as water source, by mixing experiment, found the factors that affect the performance of high content of fly ash cement new wet shotcrete material, determined the standard condition of each factor, the best proportion of materials and the process.
Main Physical Properties Density.
The influence of fly ash, cement and water on stone rate Main Mechanical Properties Compressive Strength.
Accordingly, various factors need to be considered comprehensively, and the position of mixing point, nozzle shapes and sizes may be changed.

Mechanical test were performed to measure effect of fly ash on affecting compressive.
For quantitative addition to the fly ash, the foam concrete other dosage factors, including cement, water, calcium stearate, gray calcium, fly ash and fiber, as shown in Table 1.
Various factors affect the composition of the cell wall and cell type affect the foam concrete strength.
,and Wee,T.H.(2005).Properties of lightweight expanded polystyrene aggregate concretes containing fly ash.
Influence of filler type on the properties of foam concrete.

Initially, the mechanical and micro-structural properties of the materials were investigated by FSW.
Additionally, mainly four factors were measured in analysis of variance.
The mechanical properties of AA6061 and AA6101 are given in Table 1 [14-15].
"The effect of mechanical alloying on SiC distribution and the properties of 6061 aluminum composite." 
"Mechanical properties of al 6101-T6 welds by friction stir welding and metal inert gas welding." 

The model takes into account friction forces and identifies the mechanical properties of the injector.
Their robustness and relative insensitivity to fuel properties and quality are attractive features.
The identification procedure for the mechanical properties of the model parameters was changed and the simulations of the needle lift, pressure in the injection sac and the fuel dose injected were conducted.
[2] Idzior M., A study of compression ignition engine injector nozzle parameters in the aspect of their operating properties.
(in Polish) [7] Bąkowski A., Radziszewski L., Identifying the mechanical properties of the fuel injector of an internal combustion engine, In Problems of maintenance of sustainable technological systems eds.

It was found that the compounding method was important for the derived mechanical properties of the blend.
Furthermore, cooling method of the extrudate also affected the mechanical properties of the blends.
The air cooling in the extrusion process provided higher mechanical properties than the water cooling.
Testing of Mechanical Properties The tensile properties and impact resistance were carried out at room temperature (25-27°C) according to ASTM D412 and ASTM D256, respectively.
Sun, Mechanical and thermal properties of poly(lactic acid)/starch blends with dioctyl Maleate, J.

This article describes the possible effect of heat treatment to the properties of springs made from VDSiCr.
Reduction of residual stresses on springs made from oil hardened and tempered wire, d=6mm, w=5 and nt=6.5 after 22 different heat treatments Mechanical properties of oil hardened and tempered wire The mechanical parameters of spring steel wires vary due to heat treatment.
As to be seen in Fig. 4 the heat treatment influences not only the residual stresses but also the mechanical properties of the wire material.
Afterwards the spring properties were tested.
In the heat treatment of springs from oil hardened wire material with temperatures exceeding 400°C must be noted, that the strength properties of the springs are significantly affected and the heat treatment time greatly affects the spring properties.

It should degrade at a controlled rate while releasing drugs and/or bone growth factors and its mechanical properties should match those of the host tissues.
In this work, we demonstrate how robotic assisted deposition can be used to build organic and hybrid organic/inorganic parts with custom compositions, designed porosity and tailored mechanical properties.
The final line thickness depends on several factors: nozzle diameter, printing speed, printing height (�Z in Fig. 1b) and drying shrinkage (typically ~ 25% in volume).
For example, for a 410 µm tip, the line diameter does not depend on the speed, but for a 5 µm diameter nozzle, the diameter of the printed lines can be reduced from 400 µm to 100 µm, without affecting the pore size, by increasing the printing speed from 5 to 20 mm/s.
The mechanical properties of the scaffold are anisotropic and the data shows how they can be easily adjusted by controlling the composition.

The study of the electrical properties of concrete was performed using the voltmeter – ammeter scheme.
However, the reliability of the results of determining the state of structures is also affected by changes in the properties of materials, which is associated with various factors.
The influence of technological and operational factors on the results of determining the properties of concrete in structures using non-destructive methods is given in [13].
The use of plasticizing additives was rejected a priori in order to reduce the influence factors on the properties of electroconductive concrete.
The study of the electrical properties of concrete was performed using the voltmeter – ammeter scheme.