Advanced Materials Research Vol. 382

Abstract: The correlation performance between polymer/cement ratio and corrosion resistance to nitric acid of latex modified sulphoaluminate (SA) cement mortar was investigated by testing the compressive strength, flexural strength and weight change rate of latex modified SA cement mortar in the nitric acid solution at different ages. In addition, considering the appearance of the specimen, the results show that the corrosion resistance to nitric acid of latex modified SA cement mortar is influenced positively by the polymer/cement ratio. With the ratio of emulsion to cement increasing, the corrosion resistance to nitric acid was enhancement. when the polymer/cement ratio was 0.2, the latex modified SA cement mortar showed the best performance in compressive strength, flexural strength, weight change rate and the appearance.

Abstract: Water lubricated plastic alloy bearing molding technology determines the mechanical properties and performance of the product. The influence of molding temperature and time are significant on the performance of water lubricated bearing. The experiment selected five vulcanization temperatures from 110°C-190°C, and five time points from 5-25min to assess their influence on the tensile strength, stretching strength and abradability of bearing material. The corelation between temperature and time is analyzed and a vulcanization curve of plastic alloy production in the situation of 170°C (vulcanization temperature), 2Mpa (vulcanization pressure). The curve realizes a long vulcanization induction period at a fast vulcanization speed with a broad vulcanization plateau that reduces the vulcanization time in the production process and enhances efficiency massively.

Abstract: In this paper, we discussed the principle of material tracking and auto coiling sequence of the coilbox. The maths model of coiling master speed is built, It provides the reference for optimization and adjustment of Control parameters in the production process .

Abstract: This paper presents an automatic program to track in moving objects, using segmentation algorithm quickly and efficiently after the division of a moving object, in the follow-up frame through the establishment of inter-frame vectors to track moving objects of interest. Experimental results show that the algorithm can accurately and effectively track moving objects of interest, and because the algorithm is simple, the computational complexity is small, can be well positioned to meet real-time monitoring system in the extraction of moving objects of interest and tracking needs.

Abstract: In order to recover the iron in copper smelting slag quenched with water in smelters, carbothermic reduction was adopted to reduce the iron oxide existing in different phase such as fayalite,vitreous and magnetite in the slag to metal iron. In the optimum conditions, it was demonstrated that the metallization efficiency of iron could reach more than 86.1%. Furthermore in the process the calcium carbonate is used not only as desulfurization agent，but also as accelerated gasification of solid carbon，which improved the ratio of CO among reaction atmosphere and enhanced the reduction rate of iron oxide as well as increased the metallization rate of iron．In addition this study proved that the combination ability between calcium positive ion and silicon oxygen anion is bigger than that between iron positive ion and silicon oxygen anion. As a result SiO2 combined with CaO and FeO existed in a form of freedom state which guaranteed the reduction process went with a swing.

Abstract: Since coal gangue can destroy the environment, we aim at improving coal gangue to absorbing material by changing it in different temperature and chemical liquor. Base on the microstructure and the adsorption experiment, we detect microstructure and absorption property of improved coal gangue. The microstructure experiment shows that the average pore size and specific surface area of improved coal gangue appear distinguish obviously as the increasing of chemical liquor pH value and temperature. Absorption experiment shows that the absorption capacity of improved coal gangue decrease as the chemical liquor pH value increase, increase as the temperature increase. The adsorption capacity of improved coal gangue increases with an increase of average pore size and specific surface area.

Abstract: A novel visible-light-active C-N-Cl-codoped TiO2 photocatalyst was prepared by a simple process. The as-prepared sample was characterized by XRD, XPS, and UV-Vis. The analysis results showed that the as-synthesized sample was anatase and possessed a narrow bad gap of 2.4 eV after the doping of carbon, nitrogen and chlorine. An obvious absorption for visible light was observed in the range of 400~700 nm for C-N-Cl-codoped TiO2. By degrading of methyl orange (MO) solution under the visible light (l>420 nm) irradiation, the synthesized photocatalyst showed 5 times photocatalytic activity than that of P25.

Abstract: A visible-light-driven photocatalyst Ag3PO4 was prepared by a novel precipitation- replacement process. The synthesized sample was cubic crystals with the bandgap of 2.16 eV. And most of the particles size was among 0.5~2 mm. The Ag3PO4 shows high photocatalytic activity for the degradation of methyl orange (MO) solution under the visible light (l>420 nm). The apparent ratio constant (kapp) value of Ag3PO4 was about 239 and 50 times that of P25 and C-TiO2, respectively.

Abstract: The deformation and failure induced by Wenchuan earthquake between bedding and anti-dip slope existence very big difference. The number and size of the bedding slope deformation and failure are much more than the anti-dip slope according to the investigation and analysis. In order to analyze the layered structure affect on seismic dynamic response of rock Slope. As bedding and anti-dip slope is the study object and the seismic dynamic responses of different layered structure slope have been studied by using ANSYS finite element method in this study. Analysis shows that slope as a structure, the internal structure different lead to the slope seismic dynamic response is also different. The bedding and anti-dip slope seismic dynamic response is discontinuous or mutations in the slope as layered structure interface the boundary. And the seismic dynamic stress, displacement and acceleration of the bedding slope are always greater than the anti-dip slope. The seismic response characteristics further increased the deformation and failure probability of bedding slope. The results consistent with the investigation conclusion that the stability of anti-dip better than the anti-dip slope

Abstract: Wenchuan earthquak induced a large number of mountain hazards. Through the survey found that manual excavation slopes tend to become concentrated area of mountain disaster, it’s indicate that the effect of excavation damage on the slope deformation and failure under seismic load is very obvious. Soil slope deformation as one types of mountain hazards induced by Wenchuan earthquake, and it’s also seriously affected by excavation damage. In this paper, as Shui Caoping landslide for example, using the finite element method to simulate the landslide and analysis the overall stability and the local deformation and failure of slope affected by the excavation damage. Analysis shows that the local damage is significantly induced by excavation, and resulting in vertical stress and plastic strain increased in the local of slope near the excavation face. While excavating also has the role of unloading. The results basic agreement with the characteristics of the slope deformation and failure induced by Wenchuan earthquake.