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At higher than 20% (mass) HCl concentration, the physical properties of the resulting gels did not significantly change.
One of the most important technological factors in the technique of selective action on the well bottom, based on the use and of the gel, the setting time, is its rheological properties.
Of the rheological characteristics of gels, their plugging and resisting properties are of particular importance, which have been studied extensively [11].
Processing, properties and applications of highly porous geopolymers: a review.
Amiri, Factors affecting alkaline sodium silicate gelation for in-depth reservoir profile modification, Energies, 7 (2) 2014 568-590

This phenomenon can be probably explained by the properties of coal gangue which comes from Shuo Zhou in Shanxi province and its generation technology which is Circulating fluidized bed combustion.
The parameters of autoclave of this experiment adopted are as follows: temperature rises for 2 h and reaches 195℃, keep on 6 h, press reaches l.3 MPa, and then 2h temperature decreases. 3 Results and Discussions Due to the properties of coal gangue fly ash, a lot of experiments are done and the factors which influence the compressive strength of AAC made of coal gangue fly ash are detailed studied based on the mix proportion of B05 autoclaved aerated concrete (AAC), which is coal gangue fly ash 62.5％, active siliceous powder 5%, cementing material composed of cement and lime 31％, gypsum 1.5％,. 3.1 Influence of water-binder ratio on the compressive strength of AAC The suitable water binder ratio makes the gas unblocked in slurry and gets the better stomata structure.
And that big water-binder ratio results in couch of modeling, so the suitable water-binder ratio is very important which will effect on properties of aerated concrete.
Form table 5, we can see sodium sulfate do not affect strength obviously.
Table 6 The mechanical properties of AAC blocks Items Standard value Determined value Compression strength (MPa) ≥2.5 3.5 Dry density (Kg/m3) ≤525 516 Dry shrinkage (mm/m) ≤0.50 0.49 Frost resistance Quality loss (%) ≤5.0 3.1 Strength after frozen (MPa) ≥2.8 2.8 5 Conclusion In this paper, the possibility of low-silicon coal fly ash as siliceous material for the production of B05 AAC blocks is discussed.

Identification of Crack Damage with Wavelet Finite Element Chen Xuefenga , He Zhengjiab , Gao Qiangc and Zi Yanyang d School of Mechanical Engineering, the State Key Lab. for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, P.R.
The important property of wavelet analysis is the capability to represent functions in a dynamic multiscale manner, so solution with WFE enables a hierarchical approximation to the exact solution.
The important property of wavelet analysis is the capability to represent functions in a dynamic multiscale manner, so solution with WFE enables a hierarchical approximation to the exact solution.
According to the linear fracture mechanics relations between the strain energy release rate and stress intensity factor and the Castigliano theorem [9], the local flexibility can be expressed as ()qF EBH q c 2 2 72π = , (7) where, E is Young's modulus, q denotes the crack depth r versus the height H, and F(q) is the function of stress intensity factor of crack depth.
The corresponding material properties are Young's modulus GPa209=E , Possion ratio 3.0=µ , and density 3 kg/m7917=ρ .

In this study, we propose and verify the innovative design of QCM and a thorough investigation of the electric and mechanical response were performed with evidence marvelous efficiency.
Introduction Recently, due to low cost and easy-operating property, QCM has been used in different kinds of areas.
In order not to be affected by temperature drift, we make choice to take AT-cut quartz crystal as substrate for QCM.
Thus, in order to meet the demand of people, we have to overcome the drawbacks of miniaturization, for example, low quality factor (Q value) and high crystal impedance.
As the electric potential flux become larger, the piezoelectricity of QCM could become stronger, and the QCM mechanical stain getting larger.

The melt flow rate (MFR) represents an intrinsic property of the studied polymer system, proportional to its molecular weight distribution and hence its viscosity in molten state.
Fig. 5 Apparent viscosity variation for the PPinj melt Degradative factors influence on the polymer chain structural integrity (cracking, oxidation) or simply molecular reorientation limit both the processing temperatures and number of processing cycles/steps.
Galgali, Connecting Linear Polymers Molecular Structure to Viscoelastic Properties and Melt Flow Index, Macromolecular Theory Simul. 25 (2016) 392-398
Younes, Simple Rheological Analysis Method of Spinnable-polymer Flow Properties Using MFI Tester, Indian Journal of Materials Science. 2015 (2015) 1-9
Rek, Effect of EPDM on Morphology, Mechanical Properties, Crystallization Behavior and Viscoelastic Properties of iPP/HDPE Blends, Macromol.

The Effects of Temperature and Time on Cu-Ce Infiltration Layer of 304 Stainless Steel by Double Glow Plasma Surface Metallurgy Feng Tang1, a, JinYong Xu1, b, Yan Tang1, c, Cheng Gao1, d, Bo Gao1, e and Liang Tang1, f, 1College of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004, China atangf3@yahoo.cn, bxujinyong62@163.com, ctangy51@sohu.com, d116710709@qq.com, e412746911@qq.com, f65165123@qq.com Keywords: Cu-Ce Infiltration, Diffusion Layer, Temperature, Time.
Introduction The double glow plasma surface metallurgy technology [1] is an advanced method for surface alloying with self-dependent intellectual property by Chinese scholars, which has great advantages in diffusion speed, bonding strength, energy consumption, materials saving and so on [2].
In order to improve the surface property, the Cu-Ce infiltration layer was prepared on the surface of 304 Stainless Steel by this method.
The source electrode and samples material were pretreated with mechanical grind polish and ultrasonic cleaned by alcohol and acetone solution.
The heat insulation temperature is an important factor to affect the infiltration layer composition, thickness and tissue.

The calculation results show if the reinforced steel bar cross the crack is not rusted and destroyed, the tension stress in the sluice and the general safety factor against sliding will meet the corresponding standard.
Surface cracks usually affect project visual and surface quality of concrete.
(a)Crack location (b)FE Mesh (c)Steel bars in mesh Fig.1 Model and finite element mesh Material properties and Mechanical Parameters According to data, static parameters of materials are shown in Tab1.

Two key factors, i.e. tensile horizontal strains at the bottom of asphalt layers and compressive vertical strains are investigated.
Because of these factors, usually when we want to get numerical solutions, mechanic and mathematic troubles are in our way.
Pavement designers usually introduce some hypotheses into mechanical modles, ignore some influencing factors to simplify the mechanical models.
Meanwhile in order to make more property in one time, truck drivers are inclined to make trucks overloading.
Also, computational time affects the possible level of accuracy.

The extrapolation of these curves obtained at high stress leads to overestimated lifetimes which differ by a factor of five at low stress with respect to experimental data.
Following the literature, the intergranular cavity nucleation and growth might affect the time to fracture.
In Eq. 2, α' is a factor of proportionality which may vary widely from one material to another one.
Auzoux, ‘Reheat cracking of austenitic stainless steels – influence of work hardening on intergranular damage’, PhD thesis, MINES ParisTech and CEA Sacaly. (2004) [8] NIMS, Creep data sheet, No. 45, Data sheets on the elevated-temperature properties of 18Cr-12Ni-Mo-middle N-low C hot rolled stainless steel plate (SUS 316HP), Japan. (1997) [9] C.R.
Brinkman: ‘Elevated-temperature mechanical properties of an advanced type 316 SS’, Journal of Pressure Vessel Technology, volume 123, (February 2001)

Third, after the shaft lining destruction, the thickness of the foam plastic boards laid between outer wall and frozen wall which are used to carry pressure from external load and keep the temperature of newly poured concrete always become about 1.00mm under extrusion, regardless of their original thickness is 50mm, 70mm or 100mm. 2 Main destruction causes of shaft lining structure (1) Additional vertical pressure of shaft lining The basic geological factor inducing the engineering geological disasters is that the under surface ground of ruptured shaft lining there exist thick aquifer sands (also called underground aquifers) directly covering on the coal-bearing rock [1].
Fluid-structure interaction occurs when the fluid and solid have interactions affected by the mining activities.
(4) Aspects of soil performance Before the shaft lining construction [3], the soil mineral compositions and related physical and mechanical properties of the soil layer where shaft lining passes shall be clarified.
Therefore, the mechanic properties and construction performance are the key factors of controlling deep shaft excavation workload and even construction possibility.