Search results

Characteristics of Aeolian Sand Aeolian sand in the Horqin desert sand is fine-grained, and it is without viscidity and plasticity.
The test results shows in Table 1, the CBR of aeolian sand is functions of its water content and dry density γ, and hammering the number [6].

A number of studies in recent years have concentrated on powder metallurgy based processing of boride reinforced Ti-alloy composites [1–6].
So, fine-grained matrix microstructure was significant formed in composite coatings.

But cracks initiated in the ferrite grains for all of the pre-strained and non-pre-strained specimens, and there is no effect on the crack branch point.
S-N curves 105 106 107 108 120 130 140 150 160 170 180 190 200 210 220 230 240 250 Stress amplitude, MPa Number of cycle to failure εp= 0% εp= 2% εp= 5% εp= 8% εp=12% εp=22% 0 5 10 15 20 25 30 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 Fatigue limit ratio Pre-strain ratio, % εp= 0% εp= 2% εp= 5% εp= 8% εp=12% εp=22% Fig. 3.

Fresh concrete and cement mortar are suspended gels and they are semisolid during graining process.
From the cavity surface it can be seen that there are a larger number of radial cracks around the cavity, the deepness of them are from 1cm to 2cm.

The hydraulic diameter (defined as H) and the turbulence intensity (defined as I) are calculated separately using the below formulas: (1) (2) where, A is the burner jet orifice area, χ is the interface perimeter, Rh is the hydraulic radius, Re is the entry Reynolds number.
The coal consumption is set according to operation parameters and the particle size of pulverized coal is empirical data or grain-size analysis result of the coal sample.

Carbohydrates are the storage of luminous energy; biomass is the carrier of light cycle conversion and the only renewable carbon source, which can be converted into a number of solid, liquid and gaseous fuels or energy of other forms, so it is known as the Biological materials energy.
In recent years, China's biomass fuel has made great achievements, especially the fuel ethanol production taking grain as raw material has basically formed the scale.

The inner diameter is correlated with the cable designed pulling force (the number of the strand the strand used), and the outer diameter and shape of ribbed stirrup are correlated with the cable designed tension, properties of rock soil and the protective level of the cable.
The shape and arrangement of ribs can 　 Fig.3 Plain concrete specimen to model the surrounding rock (a) grain side (b) cross ri (c) longitudinal rib Fig. 4 The supporting body of the anchorage cable of the pressure type affect the shear strength between the steel pipe and bearing mortar, thus affecting the pressure decay rate on the pipe.To study the influence outer ribs of steel pipe have on transferring power, three kinds of shape of supporting body surface are selected, smooth, with transverse ribs and with longitudinal ribs.

Especially, particulate reinforced Al MMCs have received considerable attention over a number of years because of their improved mechanical and wear resistance properties，availability, low cost, and isotropic properties[3,4].
In the case of the composites, there are three typical morphologies as follows: dark gery α-Al matrix, white net-like phase existed on grain boundary, and fine particles phase dispersed in the matrix uniformly.

Table 3 Results of Orthogonal Experiment Number Depth of Tanks[mm] Glue Spread [g/m 2] Adhesive Type Ultimate Tension[N] 1 12 140 PVAc 1184.5 2 12 160 MDI 1437.0 3 12 180 PVAc 1557.0 4 12 200 MDI 1287.3 5 9 160 PVAc 1546.0 6 9 140 MDI 1364.5 7 9 200 PVAc 1421.3 8 9 180 MDI 1238.0 9 6 180 PVAc 1920.3 10 6 200 MDI 1585.3 11 6 140 PVAc 1428.3 12 6 160 MDI 1569.7 13 15 200 PVAc 1314.0 14 15 180 MDI 1392.7 15 15 160 PVAc 1139.0 16 15 140 MDI 1364.5 600 800 1000 1200 1400 1600 1800 3 6 9 12 15 18 Depth of The Tanks[mm] Ultimate Tension[N] 1200 1250 1300 1350 1400 1450 1500 1550120 140 160 180 200 220 Glue Spread[g/m 2 ] Ultimate Tension[N] Fig.4 Effect caused by different depth of tanks on ultimate tension of wood I-joists.
(2) The main destructional form is the fracture in the direction parallel to grain on the flanges which was mainly caused by adhesive type.

It is caused by the two main factors[5]: (1) the straw is a microporous material by itself and has good thermal insulation performance. (2) due to existence of straw fiber, big air bubbles introduced into slurry water is cut into small bubbles by large number of fiber, and the average pore size in the material is thus reduced, which helps to improve the thermal insulation.
Therefore, the larger the size of grain and pore, the lower the thermal conductivity of straw boards will be.