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The surface modification of carbon nanotubes (CNTs) has been recently observed to influence the distribution of CNTs in epoxy resin and the mechanical properties and electrical conductivities of these CNTs.
This investigation studies the consequent enhancement of the mechanical properties and electrical conductivities of CNTs.
Additionally, all of these factors critically affect the creep behavior and the strength of composites.
Hadjiev,“A strategy for improving mechanical properties of a fiber reinforced epoxy composite using functionalized carbon nanotubes,”Composites Science and Technology, vol. 71,(2011), pp.1089-1097 [12] T.
Shimamura,“Mechanical properties of alighed multi-walled carbon nanotube/epoxy composites processed using a hot-melt prepreg method, ”Composites Science and Technology.(2011) [13] Chen, C.

As clayey soil has weak physical and mechanical properties, stabilizers are added in the soil to increase its strength .The waste materials were Palm Oil Fuel Ash (POFA) and lake water (waste water).
The soil index properties was determined by carrying out the physical test and compaction test.
A total of 50 samples were prepared which were tested for unconsolidated undrained Triaxial test and pH test to determine its relative mechanical and chemical properties.
The factors that can change the properties of the soil are the ion changes (Cation and anion) and the degree of acidity and alkalinity of those waste in the water [4].
Mechanical Property of the soil specimens are determined.

Selection of filler material is key factor of the weld, with major impact over mechanical properties of assemble, stability at high temperature and corrosion resistance.
Realization of Prototype Choosing of parent materials From mechanical point of view, ram must have high mechanical properties at high temperature.
Another factor which requires preheating is dimension of welded parts (90mm diameter).
Taking into account these factors, result a preheating temperature of 360 ℃.
This type of alternation (zip shape) is optimal in terms of the mechanical strength of the joint.

On the other hand, mechanical factors such as low strength and toughness, has restricted the application of hydrogels for load-bearing surfaces such as synthetic cartilage, where formidable mechanical performance is required as well as wear resistance and damage tolerance.
Mixing of a less swellable, stiffer hydrogel with softer but more swellable one, will lead to tuning in mechanical properties of IPN, as well as its swellability.
It was observed that friction properties were significantly affected by lubrication and they decreased with an increase in the amount of applied load.
The sliding speed did not significantly affect the friction properties of the hydrogel, as shown in Fig. 2 (b), while the presence of the boundary lubricant contributed to reducing the friction coefficient by nearly 80%.
This shows the fairly strong wear properties of PAAm-Alg hydrogels that can be enhanced by other factors such as crosslinking density, which is the subject of future studies.

However, the results were wanting because of many factors.
Finally they concluded that nano-measurement is too far removed from representing macro wood mechanical properties stemming from the complexity of wood structural hierarchy [8].
It is well known that the physicomechanical properties of wood are controlled by three factors: the proportion of void volume (can be determined from the wood density); the organization of the cell wall ultrastructure (in addition to the ultrastructure of the cell wall, variety and proportion of cell types), and the moisture content [9].
Crystallinity affects significantly the physical, mechanical and chemical properties of cellulose fibers, including wood hardness [11, 12].
Čufar, Mechanical properties of sapwood versus heartwood in three different oak species.

ramie fiber with coupling agent can improve the anti-thermo-oxidative properties of the composites.
Introduction Natural fiber is abundant and has proper properties,it has been widely used to form “green” composites [1-3].
Thermo-oxidative aging The thermo-oxidative aging tests of the composites were carried out.The mechanical properties,color stability and thermal properties of the composites were measured when the composites were aged for 0,500,1000,1500 and 3000h Flexural tests Flexural properties of composites were determined using a MTS Universal Mechanical Tester(model CMT4204).Three-point bending tests were carried out following ASTM D790 standard[6] methods.Impact strength was measured in an impact tester(Charpy) according to ASTM D6110.All the results were taken as the average of five samples.
Results and Discussion Effects of the treatment on mechanical properties of the composites The flexural properties of different composites at different aging stages are shown in Fig.1.The flexural strength and modulus of the unmodified composites(UC) before aging are 30.17MPa and 1628MPa respectively,while those of the modified composites(MC) are correspondingly increased by 15.9% and 21.7% to 34.96MPa and 1928MPa,indicating that treating the ramie fiber with KH550 is good for the improvement of the flexural properties of the composites.
,in a composite,the aging may happen to not only the matrix,but also the reinforcement,and even the interface.In addition,the aging of the material will affect the diffusion and comsuption of oxygen in the material,as a result,the crosslinking density of the molecular chains inside a material is affected,which has effects on the properties of the material.

As declared in [8], there is a gap according to the clarification of the effectiveness of lithium compounds on macroscopical properties of cement such as workability and mechanical properties.
The conclusions in this paper may be useful to provide some evidences for adjusting the workability and mechanical property of concrete during concrete mix design.
The effect of lithium-based admixtures on the properties of concrete[].
The mechanical and microstructural properties of LiSO4, LiNO3, Li2CO3 and LiBr added mortars exposed to alkali-silica reaction [J].
Rheology and early age properties of cement systems [C].

Properties of concrete.
P.Ⅱ42.5 Portland cement, quartz sand, tap water, superplasticizer: high consistency naphthalene water reducing agent, detail properties as shown in table 1, fiber: PVA fiber, in order to obtain high toughness and controllable microcrack(≤200μm), PVA fiber needed high hydrophilicity and high modulus, detail parameters shown in table 2: Table 1 Properties of superplasticizer solid-containing content (%) 92.0 PH value 9.0 Sodium sulfate 4.0 water reduction ≥18.0 (0.75%cement) Table 2 Typical geometrical and mechanical properties of the PVA fiber Diameter (mm) Length (mm) Elongation (%) Young’s modulus (GPa) Tensile strength (MPa) 40 12 7 41 1560 Test Methods.
Vessel should be minimized affect on mechanical properties.
The match of Self-healing system and matrix material is important factors on healing efficiency and properties of concrete.
The surface properties wall material strength, geometry parameter and dosage of self-healing system have important role on self-healing effect.

And under the optimum condition, the mechanical properties of SC-CO2 treated wood were not significantly affected.
In order to confirm the optimum penetration craft, this study designed the experiments as following table 1, and retention as well as penetration uniformity were used as the main evaluating factors.
Table 1 SC-CO2 Penetration experiment of IPBC for wood Serial number Pressure[MPa] Temperature [℃] Pressure Time[h] Time for releasing pressure[min] Weight Gain[kg·m-3] 1 10 44 1.5 30 4.547 2 13 41 4 20 3.988 3 16 56 1 10 3.628 4 19 35 2.5 20 5.496 5 22 53 2 10 3.403 6 25 38 0.5 10 2.944 7 28 47 3 20 4.863 8 31 50 3.5 30 4.433 Moreover, several main mechanical properties of wood after treatment of SC-CO2 under the same optimum craft, such as modulus of rupture, modulus of elasticity and compression strength, were also examined.
The results indicated that all the mechanical properties were slightly declined, however, without remarkable loss according to variance analysis.
Under the optimum condition, the mechanical properties of SC-CO2 treated wood were not significantly affected. 2) Compared with traditional penetration ways, preservative penetration by SC-CO2 was more effective with good preservative retention and uniform distribution of preservative. 3) SEM-EDX results showed that IPBC mainly penetrated into wood cell walls, resulting in lower preservative leachability.

Pulse cleaning process affected the durability of the filter.
Porosity and mechanical strength of the filter, that are basic properties of filter elements, were 58% and 10 MPa.
Other factors such as pulse valve opening time and face velocity etc., were fixed.
The properties of the filters were analyzed after thermal shock and pressure shock tests.
Pulse cleaning process was shown to affect the durability of the filter.