Search results

The coarse aggregate used is natural pebbles from Ruhe River which is made up of different maximum grain size of pebble.
Coarse aggregate of artificial pebbles screening were obtained 5-10mm, 10-20mm, 20-40mm and 40-60mm diameter range of the four aggregates, the proportions of size and the concrete mix are shown in Table 5 and 6, in which L represents pebbles concrete, followed by numbers that is water-cement ratio, the last digit is the maximum size of pebbles aggregate.

A large number of free crystal water inside the foaming gypsum mold has been removed by the thermal baking process, under the temperature range from 50℃ to 100℃, generating the α hemihydrate gypsum.
Changes in plaster microstructure by pre-stressing or by adding gypsum grains: microstructural and mechanical investigations [J]:Materials Science and Engineering A. 325-332 (2003)

A cellular microstructure is displayed in the central zone of the welds done using low current, see Figs. 1a) and 1c), while columnar grain growth is observed close the fusion line.
The technique for determination of the ferrite volume fraction by systematic point count is sensitive to the observer, but the accuracy of the estimation can be increased by increasing the number of fields counted.

By simulating at 860℃(initial grain size is below 200μm) with JMATPRO, the TTT curve and CCT curve of the materials were obtained.
Results of thermal stress field   Enter thermophysical properties parameters of as-cast 42CrMo steel, grid number divided 40,000, atomic concentration 0.44, and cooling rate according to the corresponding values derived from the actual cooling rate curve of research on pure AQ251 quenching liquid by Kang Xichun [5].

The fill materials are: a crushed quarry limestone, 80-120 mm in grain size for the front and back layers cells, and a sand-scrapped tires mixture for the kernel layer cells.
Measurement device In order to understand the mechanical behaviour of these structures under dynamic loading, a large number of different types of measurement devices are installed.

In Fig. 1 (right), where the sample tempered at higher temperature is shown, we can instead see how grain boundaries have developed and that secondary carbides have decreased in number but got bigger in size.

Firstly, the metal surface was mechanically polished with fine grained emery paper followed by diamond paste on polishing cloth to obtain a mirror surface.
The impedance of a CPE is illustrated by [6]: , (2) where: Z = impedance of CPE, j = imaginary number (j2 = -1), w = angular frequency [rad/s], np/2 = constant phase angle of the CPE [rad], Y0 = constant of CPE [S (s/rad)n].

A large number of studies show that the filter paper moisture and suction values have a certain relationship, measuring balance moisture content of filter paper , and use the same rate curves got soil matrix suction and suction.
According to the literature studying on the [8] filter rating curve take the following rating curve: （1） In the formula, S as the matrix suction (Kpa );ωas filter paper water content ( % ). 2 Test of soil material In the test particle size as the standard divides soil and stone , defined particle size less than 2.0mm as soil, grain size of more than 2.0mm for stone.

The roof lithology is mainly mudstone, silty mudstone and local for small, medium grain of sandstone and the bottom for powder sandstone and mudstone.
Table.1 Main parameters of hydrology and 3# coal reservoir in the south block of Shizhuang Well number Thickness of coal seam (m) Reservoir pressure(Mpa) Initial dynamic liquid level(m) Transformed permeability(md) T(m2/d) 1 6.1 2.54 520 0.8 0.143 2 6.37 3.86 400 4.9 0.079 3 5.98 2.13 545 0.7 0.074 4 6.3 3.88 240 0.9 0.144 5 6.37 2.72 380 0.8 0.063 6 6.5 3.12 470 1.0 0.059 7 7.3 3.62 390 0.8 0.204 8 6.4 3.37 430 0.9 0.059 9 6.39 4.63 360 0.7 0.036 10 6.5 4.29 300 0.9 0.258 11 6.5 3.69 380 1.1 0.076 12 5.8 3.85 370 0.9 0.041 From Table1, the area of the original permeability and modified permeability are both poor.

Sawn lumber laminations bonded with an adhesive so that the grain of all laminations runs parallel with the long direction [2].
This shows that finger joint position and FRP length make significant impacts on the MOE of glulam and FRP position do Number Finger Joint Position [mm] FRP Length [mm] FRP Position MOE [N/mm 2] MOR [N/mm 2 ] 1 600 1200 up 11391.3 49.4 2 600 600 down 10626.9 45.4 3 600 400 up 10504.2 45.0 4 600 200 down 10055.4 44.3 5 500 1200 down 11925.1 49.8 6 500 600 up 10950.6 46.4 7 500 400 down 10894.7 45.7 8 500 200 up 10865.9 45.7 9 400 1200 up 12144.1 50.2 10 400 600 down 11625.2 48.2 11 400 400 up 11488.1 47.2 12 400 200 down 11451.7 47.0 13 300 1200 down 12143.8 50.3 14 300 600 up 11947.6 48.3 15 300 400 down 11930.1 48.8 16 300 200 up 11929.9 47.9 0 5000 10000 15000 20000 pine poplar p-600 p-500 p-400 p-300 FRP position MOE[N/mm 2] 0 10 20 30 40 50 60 MOR[N/mm 2] MOE MOR 9500 10000 10500 11000 11500 12000 12500 300 400 500 600 Finger joint position[mm] MOE[N/mm 2] 45 46 47 48 49 50 MOR[N/mm