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Using burnt clays in mortars may influence the number of their properties; the increase in compressive and flexural strength values is monitored in particular.
If it is assumed that the durability of these composites is connected with the number of microcracks affecting them, and their ability to resist the propagation of such cracks, it is possible to quantify this durability using different brittleness parameters.
Due to having different properties to those required from the raw material additives used in ceramic products, it is often impossible to utilize such waste in ceramics in production.
These compounds are more resistant to the effect of acid in the atmosphere in comparison with the product of lime carbonation in lime mortars, and they generally increase corrosion resistance and improve mechanical properties, which lengthens mortar durability.
Influence of metakaolin on the properties of mortar and concrete: A review, Applied Clay Science, 43 (2009) 392-400

Experimental Investigation on Air-aided Water EDM Junjie Yang1,a, Zhijiang Zuo1,b and Wuxin Yu1,c 1School of Electrical-mechanical Engineering, Jianghan University, Wuhan, 430056, China atoolyang@163.com, bdongfc2001@sohu.com, cyuwux@126.com Keywords: electric discharge machining (EDM), dielectric, water, air, energy factor Abstract.
An energy factor E is introduced and employed to estimate unit-area effective power input.
Higher discharge current and higher energy factor E obtain the higher MRR in air-aided water EDM with positive polarity tool.
Oil-related properties are degraded during long-term machining.
Therefore the total energy input affects the workpiece MRR directly.

The final quality of SAP geopolymers is affected by several factors, including material fineness, reactivity, acid concentration, curing temperature, and molar ratios (Si/Al, Si/P, and P/Al).
Higher phosphoric acid concentrations can significantly improve the mechanical properties of geopolymers because phosphoric acid, as an acidic activator, can promote bonding reactions in the polymer structure, making the material denser and stronger.
Therefore, choosing the right curing temperature is a key step in optimizing the properties of geopolymers.
Excessively high temperatures affect the properties.
Properties of Red Mud-Based Foamed Geopolymer [J].

Friction stir processing (FSP) is a thermos-mechanical process for modifying the microstructural and material properties of metals.
First of all, FSP may change material properties over the thickness and material behavior is the same as functionally graded materials [5-7].
Influence of TiO2 nanoparticles incorporation to friction stir welded 5083 aluminum alloy on the microstructure, mechanical properties and wear resistance.Journal of Alloys and Compounds, 712, 795–803, 2017
Effect of multi-pass friction stir processing on the microstructure, mechanical and wear properties of AA5083/ZrO2 composites.
Correlating the microstructure to mechanical properties and wear behavior of an accumulative back extruded Al-Mg2Si in-situ composite, Tribology International, Volume 115, November 2017, Pages 199-211

To achieve these properties of structures it is necessary to define the needed number of fastening elements in separate areas of the roof – in detail, see EN 1990, EN 1991-1-4 a ETAG 006.[2] The number of fastening elements is closely connected with the thermal properties of the roof composition.
The heat transfer coefficient U [W/m2K] is one of the elementary and most clarifying values to characterize the thermal properties of selected building construction.
In the table 2 there are defined materials which formed individual models and their properties.
Table 2 – Selected properties of materials used in models Layer name λ [W/mˑK] Cu [J/KgˑK] р[Kg/m3] 1.
Unfortunately these values cannot be used in structural design because each composition consist of different order of layers, differ in material thickness, structural composition or material properties which affect value of the pint heat transfer coefficient.

Table 1 lists the properties of test specimens.
The mechanical properties of concrete and shear reinforcements were given in table 2 and table 3.
Table.2 Mechanical properties of concrete Specimen /MPa /MPa /MPa Specimen /MPa /MPa /MPa 1 40.6 27.15 3.585×104 6 34.1 22.81 3.328×104 2 24.0 16.05 2.647×104 7 37.1 24.81 3.484×104 3 24.0 16.05 2.647×104 8 37.1 24.81 3.484×104 4 34.1 22.81 3.328×104 9 24.0 16.05 2.647×104 5 27.4 18.33 2.798×104 Table.3 Mechanical properties of shear reinforcement reinforcement /MPa /MPa /MPa 10 388.54 559.23 1.88×105 Arrangement of Measuring Points.
It reflected that the mechanical properties of specimens were not good enough under the cyclic reversed loading.
The test results showed that moment was not the main factor affecting on the interface shear capacity, which is similar to the conclusion drawn by Mattock[3].

Wang et al. [7] found that the cutting force was a main factor affecting surface roughness, and observed that when these forces increase up to 250 N, an increase in roughness values was seen, and that when the forces increase above 250 N, roughness values would decrease for the milling of CFRP.
Chatelain et al. [8] found that the fiber angle is an important parameter affecting the roughness profile.
One important factor affecting the quality of machining is the tool condition.
It could lead to a false good quality cut surface interpretation, while the mechanical properties of the material for the trimmed area may decrease due to thermal damage of the matrix and the breaking of the carbon fibers beneath the trimmed surface, as shown in Fig. 3b.
Fig. 5 Surface roughness as a function of cutting length in Test 3 (in up-milling in -45˚ ply) Conclusions One of the important factors affecting machining quality is the tool condition.

The nanocomposites showed higher tensile mechanical properties when compared to the properties of pure polyamide, and the various conditions of aging influenced the degradation of these materials.
These improvements are related to mechanical properties, barrier properties, optical properties, etc. [1].
Mechanical properties.
In general, there was a reduction in the mechanical properties.
The condition of aging influences on the mechanical properties of the polyamide 6 and of the nanocomposites.

Zhao[3] founded that stir-head rotation speed, welding speed, welding angle were of the key factors to influence quality of welded zone; and only suitable matching process combination might ensure to form excellent welded zone.
Bi[4] had studied microstructure and properties of welded joint of 7A52 aluminum alloy by electron beam welding and pointed out that average impact toughness of welded joint reached to 27.67Jcm-2, which was 82.4% of that of the 7A52 matrix.
The mechanism of rare earth element addition in welding wire to improve mechanical property of welded joint was analyzed.
Microstructure and Properties of Welded Joint of 7A52 Aluminum Alloy by Electron Beam Welding [J].Hot Working Technology,2011,40(7):151-152 [5] YU Jin, WANG Kehong, XU Yuelan,LIU Yong.
Microstructures and properties of 7A52 aluminum alloy welded joint by twin wire welding [J].

And finally we got a new kind of hyperbranched polymer bactericides.The relevant key factors to influence those reaction was studied.
Introduction In recent years, hyperbranched polymer with its novel structure, the unique physical and chemical properties, wide range of application prospect has caused great attention of chemists.
Affect the substitution reaction factors are: reactant ratio, reaction temperature, reaction time, catalyst dosage.
Affect the substitution reaction factors are: reactant ratio, reaction temperature, reaction time, catalyst dosage.
The best condition for those factors are: sodium hydroxide and bromination of hyperbranched polymer Moore feeding ratio 1.2:1, reaction temperature of 180 ℃, divinyl three amine and bromination of hyperbranched polymer Moore feeding ratio 1.2:2, and the reaction time for 4 hours.