Search results

Bed materials frequently present clogging problems whose causes are related to the variation of its properties (e.g. compressive strength, specific surface area, void fraction and porosity), the release of fine material, excess of particulate matter and suspended solids and the development of precipitates [1] leading to resistance to flow and, therefore, to the decrease in treatment.
It is a potential material for WWTP due to its high strength, good durability, low shrinkage, sulphate and acid resisting properties.
Pratt, Factors affecting the strength of alkali-activated slag, Cem.
Kriven, J. van Deventer, Understanding the relationship between geopolymer composition microstructure and mechanical properties, Colloids and Surfaces A: Physicochem.
Lukey, The effect of composition and temperature on the properties of fly ash- and kaolinite-based geopolymers.

However, tensile strength of fibers is affected by many factors, such as the temperature and concentration of coagulating bath, the negative draw ratio of spinneret, and so on.
factors and levels are listed in Table 1.
Table1 Coupling state of factors and levels Levels Factors A（%） B（%） C（℃） 1 50% 80% 25 2 40% 70% 35 3 30% 60% 45 All the results at each step of the design are expressed as the mean of three experiments.
As shown in Table 2, according to the Rj values, the effect order of the three factors is: A > B > C.
Yu, Structure and properties of polyimide (BTDA-TDI/MDI co-polyimide) fibers obtained by wet-spinning, Macromol.

Influencing factors optimize the design of the wedge clamp so that the ACCC can be more widely used.
Fig. 2 describes the components and main influencing factors of the CFRP and the wedge clamp.
Definition of material properties.
The axial and radial mechanical property parameters are shown in Table. 1.
The mechanical properties are obtained according to the test data provided by the manufacturer.Fig. 2: Components and main influencing factors of CFRP and strain clamp Fig. 3: Dimension of CFRP and strain clamp Meshing.

The weak masonry (made from bricks and bounded with low-strength mortars) were created using mortars which, depending on different external factors, were degraded and there are necessary urgent rehabilitation interventions in order to assure the masonry’s durability by protecting the joints with new, compatible and reversible materials and techniques (according to Venice charter requirements).
It is important to understand that the life span as well as the environmental factors such as: water and freeze-thaw cycles, differential settlements accompanied occasionally by extraordinary actions including earthquakes and windstorms, produce permanent deteriorations on masonry buildings, imposing remedial actions, restoration or reconstruction.
Therefore the current concept of sustainable construction should include the idea of reversibility caused by the daily changes, resulting from the emerging of new technologies and material properties that are becoming more efficient.
In addition to the above mentioned factors the amount of water used in mixtures that can interact with the compounds of the degraded structure should be considered.
The failure modes of the reinforced joint masonry differs from those observed on the control specimens, namely with vertically developed cracks near the joint reinforced area, with a less affected central area.

An IM phase involving filling of the injection mold’s cavity with molten plastic is computed using a middle-plane two-dimensional equation employed for non-Newtonian fluids, that are also incompressible, under non-isothermal properties for polymers [28].
The selection of Taguchi method was based of its accuracy in analyzing results from a limited number of experiments involving more than two factors.
The possible reason for this could be that the depth and pitch are mathematical factors of the diameter hence are directly affected by a change in the value of the diameter.
Amongst the variable factors in CCS-CCC design (diameter, depth and pitch), the diameter was the only significant factor affecting all the multiple responses, with a contribution of 80.26 %. 3.
[5] Autodesk, 11 Factors for Efficient Mold Cooling: Balancing speed and quality to reduce cycle time, (2017), 1-24

The microstructure and properties such as transmittance and sodium resistance of polycrystalline alumina have improved.
Several programs worldwide [1] on structural ceramics based on silicon have focused on the challenge of improving mechanical properties.
Structural ceramic demands foremost acceptable mechanical properties, whereas optical ceramic requires a threshold light transmission.
Microstructural features such as grain size are widely known to strongly affect mechanical strength and optical transmittance of Al2O3.
Translucent Al2O3 lamp envelopes are anticipated to continue to improve in properties and processing.

Others are convinced that rheological phenomena may have affected the wood in his long stay at the museum (Bertolini-Cestari 2009).
Other scientists have attributed the cause of these phenomena to the combination of some of these factors, while, until now, the inadequacy of keel blocks has not been considered enough.
As far as the mechanical properties of materials is concerned, the wood should be considered as a hyper elastic transversely orthotropic material, which depends on the four parameters E0, E90, υ90,0, and G.
Fig. 3b lists the mechanical properties adopted for the two-dimensional FEM model. ___________________________________________ _ Material E0 E90 G Density* ______ ______ _____ ______ MPa MPa MPa Kg/m 3 ___________________________________________ _ Oak 10000 600 625 0,03 950 Pine 9500 570 594 0,03 850 Steel 210000 0.3 7800 ___________________________________________ _ * Moisture content 12% (a) (b) Figure 3: Extruded view of the cross section and materials assignment (a;.
Mechanical properties adopted for the two-dimensional model (b) In absence of better determination, the adopted Young's modules are quite low, to account for the little knowledge of the material and the state of conservation.

Thermoplastic starch absorbs water easily and has relatively fewer thermal and mechanical properties compared to synthetic polymers [10].
Where this variation in the values can be related mainly to the factors that changed during the test or the presence of defects in the characteristics of the plant.
The mechanical properties of the bio-composites are generally improved after the fibers are added.
Kalantari, Preparation of biodegradable composite starch/tragacanth gum/nanoclay film and study of its physicochemical and mechanical properties, Chemical Review and Letters, 3 (2020) 98-103
Debeaufort, How glycerol and water contents affect the structural and functional properties of starch-based edible films, Polymers, 10 (2018) 412

The location of site , the speed and direction of wind, surface structure, vegetation, soil and water affect the overall situation.
The human survival, health, nutrition and work efficiency, all of these factors are closely linked with the sun.
This pressure difference associates with architectural form, the angle of building and wind, the surrounding building layout and other factors.
From the perspective of high-rise public building energy consumption, to improve the thermal insulation properties of the building envelope structure is the most important measure for energy saving design.
The protective measure for the thermal radiation on the external wall is the use of materials with the absorption and emission properties in hot conditions.

This leads to non-uniform distribution of mechanical stresses in a sample already at the earliest stages of mechanical affecting.
In our previous work [18], there was established interconnection between polarization current and EMS amplitude in all stages of changing SSS of the rock samples differing by electric properties.
During the experiment, mechanical characteristics, such as a loading and strain, were measured.
Along with change of a variation factor, also amplitude increase in certain stages of a straining and its dispersion increase were observed.
Let's assume that a sign of a change of state of fracture process is magnitude of the module of the first derivative of : , (1) Using (1), it is possible to calculate integral characteristics of time series on which changes it is possible to interpret properties of process of a straining and fracture.