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Non-Hazardous Inorganic Waste Mixed to Metakaolin Geopolimers A good number of industrial inorganic wastes as well as civil waste mainly derived from water treatments, contains a sufficient amount of alumina and silica to be substituted to natural aluminosilicates to reduce the environmental impact.
The SEM image (Fig.2, a) of the first formulation considering the theoretical Si/Al ratio, presents a dense solid with some non reacted polyhedral grains.
The reformulation allowed the alkaline attack to ne more aggressive and to increase the number of soluble species which then bonded more strongly the polyhedral grains to the matrix (Fig. 2, b).

Numbers inside the map indicate the values for the iso-SRSP contours.
The numbers inside the map indicate the values for the iso-efficiency lines while the white and colored regimes represent the unstable and stable domains, respectively.
A closer look at this structure signifies the presence of the equiaxed pre-austenitic grains prior to the phase transformation.
The longer lath size hints at the larger pre-austenite grain size which is similar to those observed in austenitic steels after deformation at low strain rate and high temperature.

Oil and anti-corrosive coating residue were detected, as well as a significant number of corrosion pits in the shaft-flange transition zone radius (Fig. 4).
Quantitative metallography results Standard Grain size - scale Number of grains/mm2 Grain diameter ISO 643:2003 7 1204 32µm GOST 5639-82 8 2048 22µm a) b) Fig. 5.
As it is often difficult to define an accurate fatigue limit, the stress range corresponding to a given number of cycles, usually in the order of 1–10 million, is generally used instead.
The next step and further extension of TCD is the calculation of the number of cycles for which a crack will occur on a machine part of arbitrary geometry.

Second, the linear dilatation measurements can be classified by the number of axes and direction of the displacement recording as it is represented in Figure 1. [34–36] Figure 1.
Examples for the classification of linear volume change measurements by the number of axes and the direction of the displacement registration.
The radial displacement is a result of the interaction between the internal equiaxed grains, the cylindrical mantle of the columnar zone, and the molding material.
The equiaxed grains are expected to have a random orientation which should have an equally distributed influence on the total radial and axial displacement.
Consequently, the measurement layout must consider the right number of measuring directions and devices.

Otherwise there is a restaurant; the number of repast one day is about 300 people.
The biological bed area is 90m2, height is 800mm.The height from the bottom of the biological bed to the surface 0-300mm is gravel of 30-50mm grain size, 300-800mm is gravel of 10-20mm grain size.
Table 1 Plankton List Phytoplankton name 1# 20# Chlorophyta Chlorella + ++ Small crescent algae + + Scenedesmus quadricauda + + Capricornutum + + Oocysts algae + Chlamydomonas + Sharp crescent algae + Set star algae + Real cruentum + Quadrilateral cross algae + Ring wire algae + Soil prochlorococcus + The wing membrane algae + ++ Smooth desmidiaceae + Gymnodinium + Oval chlamydomonas + Bizarre variations of Sickle-shaped fiber algae + Distorted horseshoe algae + Micractinium pusillum + Bacillariophyta Hat-shaped nitzschia + + Fine heteropolar algae + + Cyclotella + Synedra acus + Navicula exigua + Pool nitzschia + Double radial section algae + Cyanophyta Dactylococcopsis + Chroococcaceae + Limnology chroococcaceae + Oscillatoria algae + Cryptophyta Eclipse cryptalgal + + Oval cryptalgal + Euglenophyta Fine grained capsule Euglena + + Sharp end of flat Euglena + Cylindrical flat Euglena + Table 2 Protozoa List Protozoa 1# 20# Semicircle case worm +
Analysis and discussion Plankton species and biomass. 35 species of phytoplankton in five types and six species of protozoa were found in the two observation points, and the average biomass was 0.6006mg/l, which was much lower than the species number and biomass of plankton of the Jiaxing Shijiuyang wetland in winter[1].
As the water was rich in plankton, even with the treatment of subsurface flow constructed wetland, there was still a large number of plankton.

A large number of numerical models, e.g. those using cohesive zone techniques, have also been developed to simulate the nucleation of cracks.
The total number of misorientation to be examined in an element is 28. 4.
For misorientations smaller than 15o, the interface is commonly called sub-grain boundary.
Thus the definition of misorientation energy in this paper generally refers to the energy of both grain and sub-grain boundaries.
A larger number of removed elements that are adjacent with each other form a larger void than that results from a single removed element.

Introduction Ceramic fibers possesses a number of highly desirable properties which render it useful in a wide variety of applications [1], it is highly corrosion resistant [2], being inert to most organic liquids and many corrosive chemicals and displaying excellent resistance to attack by various molten metals.
It is clearly that diffraction rings are observed and the (002) is the widest and the strongest one, indicating that the obtained BN grain is disordered.
(2) When the fibers is sintered above 2000 °C, the boron nitride grains in fibers could be orderly aligned, so the tensile strength and elastic modulus of the fibers could be improved substantially.

Table 1 Gear parameters of the two-speed gearbox Item Number of teeth Modulus Tooth width [mm] Helical angle [º] Modification coefficient Z1 48 14 175 12 0.748 Z6 83 14 395 8 0.728 Z3 53 12 170 12 0.429 Z4 53 12 170 12 0.429 Z5 21 14 400 8 0.406 Z2 54 14 170 12 0.8126 Table 2 Parameters relevant to strength calculation of gear box Input revolution speed[r/min] Transmitted power[Kw] Reduction ratio Input torque [N.m] Output torque [N.m] All shafts material All gears material 620 3310 4.446:1 50975.9679 226661 42CrMo 20CrMnMo Strength Calculation on the Gearbox Transmission System Fracture occurred in the output shaft of the gearbox.
And Fig. 5(d) illustrates that fracture spreads along the grain boundary, which may be relevant to the defect concentration on the grain boundary.

Fig. 2 Evolution of crystallite mean size vs milling time The evolution of mean crystallite grain size with the milling time is presented in the fig. 2.
The mean crystallite grain size is in the range of nanometres.
Acknowledgements This work was supported by CNCSIS – UEFISCSU, project number PNII – IDEI 1519/2008.

The number of samples of A and B type was 15.
The brown corundum (F22) with a grain average dz=0.9 mm was utilized.
For the rotation roller of the machine a corundum abrasive linen with a marking of grains P 80 was prepared.