Advanced Materials Research Vol. 676

Abstract: The thermoplastic composite material is glass fiber, carbon fiber, aromatic fiber and other materials to enhance various thermoplastic resins abroad collectively, known as a FRTP. Enhanced Oil Recovery (EOR) techniques helps to recover residue oil after Primary and secondary recovery of reservoir. This paper deals with a new Carbon Di Oxide (CO2) EOR technique, “HOT CO2” which includes combination of thermal and solvent techniques where miscibility and viscosity reduction are primary concern. In the proposed method CO2 will be superheated above the reservoir temperature to reduce the oil viscosities at the same time partially mix with crude oil which improves oil mobility. “HOT CO2 flooding” will going to be one the best option for EOR in future.

Abstract: Viscometer is analysis instrument which is available in measuring viscosity of liquid material. The viscometer is widely used in food, inks, paints, solvents, petroleum products and various fields of industrial production. In the field of oil drilling, viscometer is mainly used for evaluation rheological parameter of drilling fluid that is beneficial to safety, fast and scientific drilling. Circular magnetic grid could improve precision and stability when it is applied in torque measurement of automatic viscometer, and its non-contact measurement and high antipollution characteristics meet the design requirements of viscometer. The improved automatic viscometer has strong stability, good consistency and automatic reading function. According to needs of users, it would automatically draw various rheological curves.

Abstract: The ligament injury is the common sport injury in the athletic sports training, the progress and development of suture technique provides a good guarantee for the treatment of tear and rupture tendon, ligament tissue units, the use of absorbable suture materials can prevent in partly risk of Treatment induced by no absorbable suture materials. Therefore, the absorbable suture materials are generally favored by both doctors and patients. The absorbable sutures can be degraded into soluble product in the body, thereby it reducing the patients with second operation pain and minimize patient suture in scar formation, it get the more and more favor of both doctors and patients. The different materials of absorbable sutures were appeared, which meet the people's needs to some extend.

Abstract: According to the unified theory of general concrete filled steel tube, this paper puts forward a constitutive relationship model of the self-stressed concrete filled steel tube, which was verified by experiments and finite element methods. On the basis of the above, the influences of the bearing capacity of self-stressed CFST members were analyzed about the strength grades and magnitudes of self-stress of confined concrete. The results show that the bearing capacity of the self-stressed concrete filled steel tube members will be improved with the increase of the magnitudes of self-stress and concrete strength grades. Compared to the general CFST in same conditions, the maximum extent of the bearing capacity can be approximately enhanced 20%.

Abstract: The safety of Tongluoshan Tunnel construction and permanent structure , in the 6th light rail line in Chongqing City, is seriously interfered with coal mining area collapsed. Some characters of the goaf, such as the position, scale, groundwater and filling characteristics, had been probe by Ground Penetrating Radar. And then some measures had been taken, such as pipe roof ahead of support, sealers goaf filling pore grouting reinforcement. After disposal in accordance with the monitoring Data of the dynamic adjustment of the support program and to ensure construction safety, and proved the validity of the aforementioned prediction and disposal techniques similar goaf treatment.

Abstract: Manual rectangle pipe-jacking technology is adopted to jack the pre-fabricated hollow box girder slowly and evenly into the load bearing wall of masonry structure, and then core beam is poured to form a whole, therefore, the constructions will be gradually located at a “tray” with enough rigidity, which solves the structural damage caused by inadequate bearing capacity of foundation soil or unsymmetrical support. In actual masonry structure protection, there have been successful examples where such technology is used, however, till now its related fundamental problems have not been researched yet. In this paper, based on study of on-site actual measurement, its fundamental is introduced, such items as action mechanism of box girder and soil body, calculation of jacking force and its influencing factors, and more, are discussed and empirical formula for calculation of jacking force is presented.

Abstract: A method of prefabricating beam on bridge floor is sometimes employed in mountain difficult terrain. Four forms of longitudinal pedestal layout and three analysis cases obtained by orthogonal analysis method were drawn up, the mechanical behavior of the tool girder were studied by the finite element software and the role of deck pavement for tool girder was discussed. The results show that when the end of pedestal was situated in mid-span, the tool girder will reach the most disadvantageous status. Moreover, reinforced concrete deck pavement not only can improve the stiffness and integrity of the tool girder, but also can effectively decrease internal forces and deformations of the tool girder.

Abstract: The effect of scanning rate on the AA 5083 electrochemical behavior in 3.5% NaCl solution has been investigated using measurements of potentiodynamic polarization and cyclic polarization experiment. The results showed that when the scanning rate was in the range of 0.2mV/s to 5.0mV/s, the influence on the potential of pitting Epit was small, thus the scanning rate 0.5mV/s was selected. The pitting originated from intermetallic inclusions Mg2Si and resulted in corrosion of aluminium matrix adjacent to the inclusions. Experiment revealed that decrease in the chloride concentration slightly shifted both the pitting Epit and corrosion potentials Ecorr to more active values. But the effect was changed slight when the chloride concentration exceed to 1.0%.

Abstract: Experimental investigation was conducted on a low-grade copper ore in Tajikistan with grade of 0.89% and oxidation rate of 99%, which belongs to refractory oxide copper with low-grade and high oxidation rate. According to the property of process mineralogy, using vulcanization xanthate flotation process, determined once rough concentration, three times cubic concentration and three times scavenger concentration process, eventually obtained copper concentrate with grade of 15.26% and recovery rate of 85.90%.

Abstract: Forests cover 30% of global land area and maintain 73% of global soil carbon which is important to the global carbon cycle. In forest ecosystem, climate was expected to affect the quality and quantity of environmental materials (detritus) inputs to soil and soil chemical and physical processes which then affected carbon storage technically. Thus, altitude provided a wonderful site for this environmental research. We collected five soils along the altitudinal gradient on the Changbai Mountain in the North Temperate Zone to analyze the soil properties and carbon content. The results showed the highest SOC content was observed at lowest altitude for the larger plants residues (environmental materials). Except the lowest altitude, the amount of SOC increased with altitude for the low decomposition under the cold temperature. Multiple environmental factors (such as soil type, topography and vegetation) were thought to regulate SOC technically.