Applied Mechanics and Materials Vols. 117-119

Abstract: The thickness of metal base and anticorrosion is key indicators in evaluating the quality of corrugated sheet steel beams for guardrail, especially for double anticorrosion. The testing method in this paper is simple and convenient, accurate and reliable, which has been confirmed in engineering practice.

Abstract: The relationship between the bound chloride and the free chloride in concrete is very important to the durability of concrete structures. The high performance concrete (HPC) with fly ash was prepared and the specimens were tested by ASTM C1202 in this paper. The concentrations of the total and the free chloride in HPC specimens were determined after the experimentation, by which the concentration of the bound chloride was calculated. The results show that the relationship between the free chloride and the bound chloride in HPC can be described by Freundlich adsorption isotherm, and the coefficient α and β in the equation are affected by initial bound abilities and bound potentialities respectively. The bound potentiality of HPC decreased inversely with the amount of replacement of fly ash.

Abstract: Slope protection is to ensure the safety of River embankment important infrastructure projects.the actual project--the Bird Island Park in Shenyang, an example of hinge joint concrete block revetment,Using the FLAC analysis software, and the finite difference method percolation theory to calculate the 29° slope angle the role of a 45kg block under the action of Slope stability safety factor,Further discussed in detail the different blocks of different slope and slope stability on the role of the quality factor of safety effects, and draw the best slope and block quality portfolio, which is the slope of reference designs and applications.

Abstract: In sheet metal forming, the anisotropy and the Bauschinger effect of sheets affect greatly their formability. This paper discusses how the planar anisotropy and cyclic plastic behavior (the Bauschnger effect and cyclic workhardening characteristics) correlate with the crystallographic texture based on the crystal plasticity analysis on A5052-O sheet. The analytical predictions of r-values and the cyclic stress-strain responses are compared with the experimental observations (S. Tamura et al., Materials Trans, 52-5 (2011), pp.868-875).

Abstract: PVC/BaSO₄ composites were prepared by melt blending method. The mechanical properties, microstructure and thermal stability of the composites were investigated. The results indicated that BaSO₄ decreased the tensile yield stress and improved the elongation at break of PVC composites. Ductile fracture characteristics such were observed in the tensile fracture surface of PVC/BaSO₄ composites. The toughening mechanism was cavitations toughening mechanism and shear zone toughening mechanism. The reaction of dehydrochlorination was limited by the addition of BaSO₄.

Abstract: High-alloy materials such as high chromium cast iron and high speed steel have excellent wear resistance under extreme wear conditions. But they consume much expensive chromium, molybdenum, tungsten and other alloying elements too. The hypereutectic high boron alloy has good wear resistance because it contains many high hardness primary borides. But the dimension of primary borides is big. In this paper, the hypereutectic high boron alloy was prepared using sand casting method, and the primary borides were modified by different amount of K / Na modificator. The results show that the primary boride of hypereutectic high boron alloy is Fe₂B. K/Na modificator has a significant influence on primary Fe₂B. The best grain refinement effect of primary Fe₂B is obtained when the amount of K/Na modificator is 0.3%. The refining mechanism of primary Fe₂B is that K/Na modificators can not only increase the supercooling degree to improve nucleation rate but attach to the crystal face of fastest growth direction to prevent grain from growing

Abstract: Ceramic supported ferric oxide composites were synthesized by impregnation- precipitation (I) and sol-gel (II) methods using FeSO₄ as a precursor. We investigated the effect of the calcination temperatures on the structure, morphology, and agglomeration of supported ferric oxide. It has been found that Fe₂O₃ was stabilized when the as-synthesized composites were calcinated at 330-360 °C under 10% (v/v) O₂/N₂ mixture, and the calcination temperature was chosen as 350°C . The SEM images demonstrated that for the composite I, which was prepared by method (I), Fe2O3 nanoparticles were distributed on the surface and pores of the ceramic; while for the composite II, which was synthesized by method (II), Fe₂O₃ thin layer was covered the surface of the ceramic. EDS analysis showed 7.9% (wt) ferric oxide had been supported on the composite I and up to 13.3% (wt) ferric oxide on the composite II. XPS analysis revealed that the valence of iron was +3 on both composites. Fe2O3/ceramic composites were used as the catalysts for low temperature wet Flue Gas Desulphurization (FGD), and demonstrated higher SO₂ removal efficiency. Because of the excellent hydrophilicity of ceramic and high dispersibility of Fe2O3 on ceramic surface, this catalyst had high SO₂ removal efficiency at 60°C even at pH2O₃/ceramic composites, prepared by a simple, reproducible impregnation-precipitation and sol-gel method, was an inexpensive, active catalyst for S(IV) catalytic oxidation in wet FGD process in an economical feasible temperature range.

Abstract: Recycling of waste paper is demanded because of the shortage of forest resources, the pollution of environment and the scarcity of papermaking materials. It is important to raise the proportion of waste paper in the fiber materials in papermaking industry. Floating/washing method was used here with imported Old Newspaper (ONP) as elementary material. This article studied the deinking performances of many kinds of surfactants primarily. Among them several surfactants were picked out as deinking agent of Old Newspaper (ONP) because of their better deinking effect.

Abstract: Compared with the column style of Chinese traditional and Western classical from chapiter, trunk, column base in detail. Analysis of the column of the Eastern and Western Art Deco and shape differences. By comparing ,absorb the essence of both for the theoretical and practical of modern style column type decoration.

Abstract: It is usually reported that chitosan is used as paper strengthening agent. However, it is sorry that the study choosing chitosan which DD (degree of de-acetyl )and viscosity is filtered by experiments is blank. Many chitosan samples of wide viscosity range and wide DD range were tested by their strengthening effect on bleched wheat straw pulp. Then a few sample of chitosan is selected because of their obvious strengthening effect on pulp. This study could be as the foundation of further research of chitosan used as paper strengthening agent.