Advanced Materials Research Vol. 790

Abstract: The hydrophobic microporous membranes were prepared from a blend system by thermally induced phase separation (TIPS) process. The polymer blend system was isotactic polypropylene (iPP)/ high-density polyethylene (HDPE) and the diluent was soybean oil. The effects of the mass ratio of iPP and HDPE and the initial concentration of blending on the membranes structure were both investigated. Additionally, the influence of the feed temperature and the feed rate on the VMD performance of iPP/HDPE blend membranes was also investigated. For 0.5M aqueous NaCl solution, the VMD flux and reject ratio of the membranes reached 8.7kg/(m²·h) and nearly 100% under the optimum conditions (mass ration of iPP/HDPE was 6:1, and intial blend concentration was 38%), respectively.

Abstract: Over potentials for oxygen evolution reaction, corrosion rate, surface product after polarization and microstructure before and after polarization of Pb-0.2%Ag-0.08%Ca-0.05%Sr quaternary anode in zinc electrowinning were studied and compared with Pb-0.6%Ag binary anode. The results show that over potentials for oxygen evolution reaction on Pb-0.6%Ag and Pb-0.2%Ag-0.08%Ca-0.05%Sr anodes are 675 mV and 790 mV, respectively, while the corrosion current density are 8.2μAcm^-2 and 20.1μAcm^-2. The surface structure after experiment of in Pb-Ag anodes is dense and tightly attached to the base, while the surface of Pb-Ag-Ca-Sr is loose and porous. The phases of the surface are PbO₂, PbSO₄ and MnO₂ on both anods.

Abstract: The effect of the extrusion route (A, C and B_C) on grain refinement during ECAP process in 99.9995% (5N5) high pure aluminum using a die with a channel-intersection angle 90° was investigated. It was found through experiment that, the grain was very coarse in the cast ingot of 5N5 high pure aluminum, and the average grain size is about 50~60mm. After two ECAP passes, the average grain size is 300μm, 550μm and 200μm respectively with the extrusion route of Route A, C and B_C. After eight ECAP passes, the average grain size is 100μm, 100μm and 30μm respectively with the extrusion route of Route A, C and B_C. It indicates that the route B_C is more effective than Route A and C. TEM micrograph of 5N5 high pure Al with different ECAP pass under Route B_C was studied.

Abstract: This article studied the influence of the caustic soda flakes (CSF) phosphogypsum (Ard) activator on the properties and microstructure of hydration product generated by carbide slag (CS)-flyash (FA) system which used in high-grade highways pavement. Studies have shown that: the main hydration products generated by carbide slag-flyash system are calcium silicoaluminate hydrate (C-A-S-H) and ettringite (AFt), but the reaction of hydration is slow and the content of hydration products is low. However, the caustic soda flakes-phosphogypsum can promote the formation of C-A-S-H and AFt, so can improve the strength and engineering application of the system effectively.

Abstract: The electrochemical performance of Mg-Al alloy composite sacrificial anodes in seawater was studied. The results show that Mg-Al composite anode can keep the electrochemical characters of Mg anode and Al anode respectively. The protection process of Mg-Al composite anode includes 4 steps: (1) Mg anode protects the steel, (2) interface oxides expose in seawater and anode performance decreases, (3) interface oxides dissolve in seawater and Al anode begins to work, (4) Al anode protects the steel efficiently.

Abstract: In order to analyze the optical properties of different dyeing invisible curtain after long time insolation in xenon arc lamp which stimulated realistic sunlight conditions. Four different light color dyeing (yellow,blue,purple,and peach )Tricot Invisible Curtains were selected. The color and the optical properties,including the light transmittance and reflectance of the technical face and back side of samples in the ultraviolet and visible band, were tested and analyzed.The results showed that the color of all samples had different degree of fading after insolation, the anti-ultraviolet and transmittance properties were improved. The light-admitting and privacy-keeping functions of samples can keep stable after long time insolation and yellow sample keep the best performance of anti-peep properties.

Abstract: The reinforced masonry structure system is turned up as a new group of high-rise building structure type. This paper mainly researched the shear of reinforced masonry structure under earthquake. The maximum shears of the structure are calculated in X and Y direction by numerical analysis method. The changing of the shear bearing capacity is presented under three kinds of seismic waves.

Abstract: At present, the reinforced masonry structure has been widely concerned. The development of the reinforced masonry structure with a good seismic performance and simple construction is very important. This paper mainly studies on the bearing capacity of the ten storey reinforced masonry structure under the action of earthquakes with three different methods, and given the corresponding data.

Abstract: Aiming to provide reliable parameter basis for reinforcement and repairation of post-disaster design calculation and analysis, we conducted asimply-supported beam fire test and static load experiment. Respectively on the basis of experimental data, using graphic method, standard algorithm and the width of the folding subtraction, determine the equivalent stiffness beam after fire and the damage degree of mechanical properties. The specification of the experimental steps and the scientific calculation method provides guarantee for the accuracy of the final results.

Abstract: Fourting concrete beams reinforced with 500MPa longitudinal steel bars, of which 6 with skin reinforcement and 8 without skin reinforcement, were tested under two-point symmetrical concentrated static loading to investigate their crack patterns. Crack distributions in constant moment region of beams are compared. The propagation of side cracks along the beam depth is obtained. The results of this study indicate that the concrete cover of longitudinal tensile steel bars and the spacing of skin reinforcement has significant effect on crack distributions; substantial crack control in beams can be achieved if the spacing of skin reinforcement is limited to certain critical values. The curve of d-w(d is the distance between observation points of side cracks and tension face of beams, w refers to crack width at observation points) is approximately characterized by a zig-zag shape and concave-left near longitudinal tensile steel bars.