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On grade C60 concrete, the limiting grain size of it’s coarse aggregate should not be greater than 31.5mm.
On above C60 grade concrete, the limiting grain size of it’s coarse aggregate should not be greater than 25mm.
Specimes code Design strength Slump (mm) Compressive strength （MPa） 3d 7d 28d 1 C60 210 56.3 64.3 73.0 2 C60 220 54.0 68.3 72.1 3 C60 190 57.6 63.5 71.1 4 C65 220 58.5 69.2 75.6 5 C65 220 57.5 67.2 75.3 6 C65 200 55.2 61.8 76.3 7 C70 180 60.7 68.2 81.9 8 C70 190 63.0 72.2 83.0 9 C70 190 65.6 73.7 82.4 10 C75 170 68.4 76.4 85.1 11 C75 170 69.1 78.2 86.4 12 C75 180 67.3 77.9 85.7 Engineering application Through a large number of preparation experiments, the optimum mixture ratio of high strength and high performance concrete in deep alluvium freezing shaft lining is obtained, and then engineering application is conducted in three freezing shaft in kouzi East Coal Mine .

Now lot of new concretes are investigated, tested and used, for example, nanomodificated concrete [14], high-strength concrete [15], concrete on the basis of fine-grained dry powder mixes [16], concrete with using recycling concrete aggregates [17] etc.
In accordance with experimental data [19, 20] dependence is well approximated, where: A=D (when c =1) – value of D after first thermo cycle; c – number of thermo cycles; q – constant of material.
Next generation concrete on the basis of fine-grained dry powder mixes (2012) Magazine of Civil Engineering, 34 (8), pp. 47-53

In the view of protecting China’s grain production safety, it is a waste of land resources.
It is a main grain production area of the town.
In the households who were no longer planting anything, only a small number of them let their relatives or friends plant crops on the idle lands.

The first annealing temperature is higher than ordinary annealing temperature, above or close to recrystallization temperature, making recrystallization sufficiently while grains not obvious grow up.
A number of important observations could be made from these curves.
The grains with adiabatic shear deformation are badly stretched, resulting in clear shear deformation streamlines extending along shear direction.

Researchers have developed a variety of machine vision system for a wide range of agricultural products, including potatoes[1], mango[1], citrus[2], starfruit[3], grain[4], peach[5], apples [6,7], chestnuts[8], Medjool date[9,10].
Through a large number of tests, the size of the mean filter can be determined by (2) Where, min (M, N) represents the smaller one between M and N.
Jayas, “Evaluation of variations in the shape of grain types using principal components analysis of the elliptic Fourier descriptors”, Computers and Electronics in Agriculture, Vol.80, pp.63-70, 2012 [5] A.Herrero-Langreo, E.Fernández-Ahumada, J.M.Roger, “Combination of optical and non-destructive mechanical techniques for the measurement of maturity in peach”, Journal of Food Engineering, Vol.108, pp.150-157, 2012 [6] Kavdir I., Guyer D.E, “Comparison of artificial neural networks and statistical classifiers in apple sorting using textural features”, Biosystem Engineering , Vol.89, No.3, pp.331-344, 2004 [7] Mehl, P.M., Chen, Y.R., Kim, M.S., “Development of hyperspectral imaging technique for the detection of apple surface defects and contaminations”, Journal Food Engineering, Vol.61, pp.67-81, 2004 [8] Zhan Hui, Li Xiaoyu, Zhou Zhu, “Detection of chestnut defect based on data fusion of near-infrared spectroscopy and machine vision”, Transactions of the CSAE, Vol.27, No.2, pp.345

Under the same power consumption of the mill, it can increase the mill production, or reduce the cement fineness, increase the cement specific surface area and optimize the grain composition of cement.
The polar group number of the molecule will be increased by synthesis. 3) Add double bond structure.
Table5 Cement particle size distribution (%) Grinding aid ＜3μm 3-32μm 32-65μm ≥65μm Blank 8.49 60.24 30.06 1.21 TEA 9.96 62.48 27.34 0.22 TIPA 9.64 62.79 26.73 0.84 A 9.57 63.01 26.98 0.44 B 10.03 65.83 24.12 0.02 The particle size distribution is an important parameter affecting the performance of cement and different particle size distribution directly affects the chemical and mechanical properties of the cement.Tsivilis and other scholars had proposed the optimum grain composition ofPortland cement: the particle size distribution is more than 65% is 3-32μm and less than 10% is smaller than 3μm.

The use of conventional sintering methods to consolidate composite powder often results in grain growth which affects the properties of the end product.
Minimizing grain growth of the matrix is possible through carefully control of consolidation parameters, particularly heating rate, sintering temperature, and time of process.
The financial support of the State Committee for Scientific Research of Poland under the grand number 11.11.180.653 is acknowledged.

The use of refractory filler with the grain size of 30...40 µm determines high sedimentation stability of the paint composition and the required permeability to gases of the model overlayer.
Introduction of the nanostructured diamond powder, whose particles are the centres of crystallization, into the coating enables getting line grain structure of the overlayer of steel and cast-iron mouldings, moreover, it promotes the rise of the surface hardness and strength.
For every composition there was defined the percent of quality castings from their general number.

indentation number HIT[GPa] EIT[GPa] hmax[nm] S[mN/nm] 1 71.311 1093.7 47.51 0.1740 2 70.565 1233.8 46.64 0.1857 3 73.155 1268.9 44.58 0.1847 4 67.101 1235.7 48.72 0.1902 5 68.250 1410.6 46.63 0.2004 6 71.026 1141.1 47.20 0.1781 7 69.896 1169.5 47.63 0.1817 Average value 70.186 1221.9 46.99 0.1850 SD 2.012 103.2 1.28 0.0086 RSD (%) 2.87 8.44 2.72 4.65 After the first group indentations on the diamond sample, the indenter was checked with fused silica.
Shin, et al, Grain size dependent physical and chemical properties of thick CVD diamond films for high energy density physics experiments, Diamond Relat.
Flöter, et al, Grain size dependent mechanical properties of nanocrystallineline diamond films grown by hot-filament CVD, Diamond Relat.

With the increasing distance from the item boundary deeply to the honeycomb joint, the temperature gradient lowers, therefore the number of grains per unit area lowers also.
In the article [7] it was observed that columnar grains strongly elongated parallel to build direction with decreasing wall thickness.