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Introduction The combined aggregate concrete is a kind of transitional concrete, the properties of which are between light aggregate concrete and common concrete.
According to the test results, the experimental phenomena of the combined aggregate concrete beams are similar with the ordinary concrete beam, and the factors affecting the strength of diagonal section is same.
References [1] Muyu Liu, Huaquan Yin, Qingjun Ding, Shuguang Hu: Journal of Wuhan University of Technology, Vol. 28 (2006) ,No.12, p.85-87 [2] Leishun Zhang, Xiaolei Zhang, Guoxin Yan:Industrial construction, Vol. 37 (2007),No9,p 57-60 [3] Fazhou Wang, Dinghua Zou, Shuguang Hu, Hongwei Han, Hua Xu: Journal of Henan Polytechnic University, Vol 24 (2005),No.2,p.136-139 [4] The Technical Specification for Light-weight Aggregate Concrete(JGJ 51-2002), China, Architecture and Building Press(2002) [5] Code for design of concrete structures(GB 5010-2010), China, Architecture and Building Press(2010) [6] The Standard for Test Method of Mechanical properties on ordinary concrete(GB 50081-2002),China, Architecture and Building Press(2002).

Fanc School of Mechanical Engineering, Hebei University of Technology, Tianjin, P.
The stress concentration factors were obtained for the clamp joint.
Mo [4] studied the three main factors which affect the dynamic performances of the bed using Ansys and optimized the place machine by decreasing the lower order natural frequencies.
It can also be seen with little surprise that the structural pre-stress affects the frequencies with a small degree.
Zhang: Static/dynamic property analysis and optimization design for mechanical structure based on generalized modular design, [Doctoral dissertation], Tianjin University, 2004 (In Chinese) [6] T.Fang and P.Xue: Vibration theory and application.

Plumtree Department of Mechanical and Mechatronics Engineering, University of Waterloo, Ontario, Canada.
The initial surface properties are changed and the increase in surface roughness with its accompanying local stress concentration tends to accelerate the crack nucleation stage [2], countering the work hardening.
The induced compressive residual stresses and work hardening are two essential factors which improve the fatigue behaviour of the shot peened steel.
The mechanical properties of the steels are given in Table I below.
Mechanical Properties Steel Yield Strength (MPa) Tensile Strength (MPa) Elongation (%) Reduction of Area (%) AISI 1141 576 921 16 39 AISI 1151 945 1007 14 31 Powder Forged (P.F.) 593 924 16 30 AISI 1070 552 993 15 27 Following their respective heat treatments, all the steels were machined with a gage width of 11.5 mm, thickness 1.8mm and length 180 mm and a generous shoulder radius of 20mm at the gripped ends.

Consequently various standard sizes and lengths of reinforcing steel bars are the main factors used for the design of reinforced concrete beam or column structures.
The material properties of reinforced concrete were designed as follows: 35 MPa for compressive strength of concrete and 240 MPa for yield stress of reinforcing steel.
Variety of beam specimens Results and Discussion Material properties.
This strength achievement was directly affected by several factors, such as material quality, mix design, compacting and curing processes.
The reinforcement ratio, material characteristics, and typical joint treatments can be categorized as key factors affecting the flexural ductility of beams. 4.

An effective method used to improve the mechanical properties of Mg alloys is grain refinement.
This is due to the obstruction of dislocation activity by grain boundaries, which is known to improve mechanical properties [15].
Mukai, Microstructure and mechanical properties of AZ91 alloy produced with ultrasonic vibration, Mater.
Shih, The effect of ultrasonic treatment on microstructural and mechanical properties of cast magnesium alloys, Mater.
Zhai, Effect of ultrasonic power on microstructure and mechanical properties of AZ91 alloy, Mater.

Study on the relation between the properties and the blended ratio of soybean protein fiber/cotton blended yarn Qingbin Yang1,a 1College of Textile，Qingdao University，Shandong, Qingdao，266071,China aqdbrian@163.com Key words: soybean protein fiber; blended yarn; blended ratio Abstract: The strength and elongation, the unevenness and the number of hairiness of the soybean protein fiber/cotton blended yarn are tested.
It has so excellent cashmere handle, silk softness and heat resistant properties that it has been called manmade cashmere and found wide application.
The pure cotton yarn, the pure SPF-PVA yarn and the blended yarn are of 18tex and 320 twist factor.
This results from the mechanical property of the fibers.
Although the fibers are blended and twisted with each other in forming the yarn, this does not affect or change the facts of the non-matching due to the difference of the mechanical property of the blended fibers.

Numerous laboratory tests worldwide and in our country have shown that a crucial impact on the physical - chemical properties of the ash and slag, have the following factors [21]: · type and genesis of coal · the degree of fragmentation of coal · where the fly ash is poured Studies showed that the fly ash and slag from lignite and brown coal vary considerably in composition and quality compared to ash and slag obtained by burning stone coal.
Physical and mechanical properties of fly ash and fly ash stabilized with the addition of a binder is a suitable material for the construction of roads and other infrastructure (elements) systems (levees, fill ditches, fill behind the building, etc.).
Effects of rice husk ash and fiber on mechanical properties of pervious concrete pavement (2014) Construction and Building Materials, 53, pp. 680-691
Quantification of the effects of environmental leaching factors on emissions from bottom ash in road construction (2006) Science of The Total Environment, 362, pp. 42-49
Determination of Ash Mixture Properties and Construction of Test Embankment – Part A (2006) Indianapolis, 335 p

It was found that that the measured improvement of mechanical properties is significant also in the statistical point of view.
Mechanical properties of the stressed samples were determined using a T 2000 Tensile tester (Alpha Technologies) with the displacement rate in 2 stages.
Conclusion As has already been mentioned, in practice, in the preparation of nanocomposite polymer systems, multiple influences and process conditions interact and affect more properties of the resulting nanocomposites.
Therefore, statistical methods have been used for a more comprehensive assessment of the properties and their relationship.
This result is also important for the practical preparation of nanocomposites based on polymers and clays as it has been confirmed that in these systems the improvement obtained in this case mechanical properties can be considered significant even in a more comprehensive view of the whole system and its properties.

With same density, the new syntactic foam have better compressive properties.
The wall thickness of hollow particles had been regarded as an important factor which would affect the mechanical properties of syntactic foam[1].
The result shows that SF-M4 foam have better compressive properties than SF-K25 foam but with almost same density.
It is because that the density of S38HS HGMs is higher than M4 HGMs, and its mechanical property is better.
Before crushed, S38HS, S60HS HGM acted as energy absorber which leads to better compressive properties of SF-M4 foam.

Electropulsing treatment was applied to high carbon pearlitic steel to assess the effects of the treatment on microstructure and properties.
At 40μs, no visible electropulsing effect was observed and no change in electrical or hardness properties was noted independent of the frequency applied.
No change in electrical properties was observed but microhardness was found to decrease after electropulsing compared to cold-rolled, unelectropulsed samples.
However, the literature suggests that other factors such as athermal effects (electron wind) may also affect the microstructure [8-10].
Liu, Effect of Electropulsing on Recrystallization and Mechanical Properties of Silicon Steel Strips, J.