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Due to a number of technological and manufacturing reasons, it is preferable to concrete massive foundation mats and other massive structures as a single block of equal height.
Malinin [5], the instantaneous elastic deformation modulus of concrete is represented by the formula , (1) where = 38000 MPa is the limit value of the concrete deformation [18-22], and the slump of the concrete cone higher than 8 mm and coarse aggregate with 40 mm grain are used.
We calculated a number of variants in which the electric heating was switched on right after the concrete pouring, while the constant temperature in the electric cable installation area was maintained for 15 days.

Introduction In the Czech Republic, the number of heating plants fueled by various types of straw (rape, wheat, etc.), wooden chips and pellets has been increased over the last few years.
The principle of determination of shape index is to measure the thickness E and length L of each grain in a sample of several hundred stones and then to calculate the ratio L/E between the smallest and the longest size of each particle.
Acknowledgment This work was financially supported by Ministry of Education, support of specific academic research - Student grant competition VŠB - TU Ostrava, the identification number SP2014/161 –Utilization of glassy waste material from biomass combustion.

So far a number of reports are mainly about the nickel plating on AZ series magnesium alloy and little information has been reported on ME20M magnesium alloy[3，13，14].
It can be attributed to the rare earth element in the ME20M magnesium alloys, which decreases the size of grains and increases the strength of magnesium alloys.
The diameter of bigger nodular structure was 10 mm, which is composed of a number of smaller granules.

Coatings produced by FS are also known to be free of pores and solidification cracks and present a fine grained structure caused by dynamic recrystallization during the process [2, 8].
This work was partially funded by FAPEMIG (grant number PPM-00662-18), CNPq (grant number 409139/2016-5) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

As expected, such kind of equations requires complex and expensive laboratory trials to obtain the flow stress as a function of grain dimension, dislocation density, etc.
Equivalent stresses (s) and deformations (e) were derived from t and γ as: where M is the torque in Nm, N the number of revolutions.
· In that way each complex equation can be put in the linear form: (7) The same consideration can be made for equations characterised by a more elevated number of variables.

The fine-grain structure of the mix enables to produce concrete paving blocks by precisely repeating moulding process.
A number of research articles analyse the characteristics of paving blocks where crushed concrete waste [2, 3], crushed ceramic brick waste [4] and marble waste [5] is used as aggregates.
In Northern European climate conditions these blocks are often exposed to high humidity and freeze-thaw cycles, the number of which has a great effect on the durability of the paving blocks.

Introduction The process of production of high-energy permanent magnets (HEPM) having rare-earth metals, using the method of powder metallurgy, includes the stage of production of powders of appropriate alloys having desired size of grains and physical-mechanical parameters.
On a number of occasions the reaction proceeds rather actively even at a room temperature.
In a number of cases, metallographic samples of the alloy were used as a preform to carry out the metallurgical study of modification of the sample surface during hydrogenation.

Especially in the recent century, to meet rapid grain needs with increasing population, intensive farming, chemical fertilizers overusing and machine tilling to agriculture changed fertility and productivity of arable lands, and also biogeochemical cycles of carbon and nitrogen in agro-ecosystems, which led to more greenhouse gas emission s including CO2, CH4 and N2O from rural ecosystems [4], and then affected global climate.
Main soil types in Gaoyi County a) Code Soil type Soil group Area (hm2) Area percentage % Number of samples 1 Sandyloam limestone cinnamon soil Cinnamon soil 140.28 0.67 2 2 Lightloam cinnamon soil 3522.37 16.8 26 3 Thick-stone lightloam cinnamon soil 67.84 0.32 1 8 Low-stone lightloam cinnamon soil 54.74 0.26 2 10 Sandyloam meadow cinnamon soil 184.76 0.88 1 12 Lightloam meadow cinnamon soil 15226.9 72.54 58 15 Deep-clay lightloam meadow cinnamon soil 923.81 4.39 8 a) Soil codes instead of soil type names will be used in the contents below.
In this region, these driving factors included the increasing numbers of harvest machine, farming machine and irrigation machine etc.

The value L, m was determined by the height of the grinding chamber and the number of passes of the material through it.
The average size of the crushed grains was determined from the data obtained from "SK LAZER MICRON SIZER".
The material was put through the grinding chamber a certain number of times to set the grinding path L equal to 1, 2 and 3 m.

It allowed for consideration of the fine morphological features of the scale and the scale/metal interface while, at the same time, reducing the number of elements under consideration (Fig.1).
Rolling of the specimens at higher speeds and aspect ratios resulted in rapid removal of material from the stock surface due to abrasion and adhesion, a churned up a subsurface layer with fine grains and mechanically entrained oxides.
The numerical results indicated a tendency for an abrupt increase in the number of through-thickness cracks and decrease of crack spacing at some level of the tensile strain.