Advanced Materials Research Vols. 490-495

Abstract: The damage assessment of reinforced concrete structure after fire was investigated by the pertinent theory of fuzzy mathematics and a mathematical model was established. With the establishment of the assessment system, the ascertain of the factorial weighting, the numeric quantification of various qualitative factors and quantitative factors and the application of fuzzy assessment , a new assessment system which based on the theory of fuzzy mathematics and was suitable to the damage assessment of reinforced concrete structure after fire was formed. An elaborate introduction on the establishment of the means and process of the assessment model was made, finally a practical example was showed to concretely illustrate the means and process of the assessment system.

Abstract: The epoxy is a thermosetting resin, for the lack of toughness after cured ,a brief introduction of epoxy resin toughening technology research progress, detailed in the recent years a number of toughening epoxy resins new methods, including toughened thermoplastic resin, IPN toughening, core-shell particle toughening, thermotropic liquid crystalline toughness, rigid polymer toughening, nano-particle toughening and so on. At last, the paper provided an overview of the progress of epoxy toughening modification technology and its future prospects.

Abstract: In order to find the crack reason of H700X300 H-beam rolled in air-cooling conditions, finite element analysis has been used to study the cutting process. Find that the R position existed serious stress collection when cutting to the central of the web in the cutting process. The stress is three-dimensional stress, and each is tensile stress. It is accord with the Q235 steel brittle fracture law. So the conclusion can be draw, the reason of H700X300 H-beam occur cut fracture is for exist crack, stomata and other defects in the stress collection position. The experiment testify the conclusion

Abstract: Calcium content is an important index to evaluate calcium tablet quality. Calcium content in calcium tablet was determined by micro titration and conventional titration seperately and parallel determination results of microscale chemical laboratory and constants experiment were compared. The results of micro titration were accurate and reliable. Microscale laboratory has such characteristics as obvious phenomena, saving reagents, fast analysis. So the cost was reduced and the innovative ability of students was improved by full compliance with the concept of green chemistry. Microscale laboratory is worth promoting

Abstract: This paper presents a review of the effects of hygrothermal environment on carbon fiber-reinforced composite materials. A brief summary of the hygrothermal phenomenon and hygrothermal mechanism of CFRP is followed by a detailed review of hygrothermal effects on the performance of the three components of CFRP. In the last, the main problems existing in research process nowadays and its tendency have been proposed.

Abstract: The anticorrosive work for pipeline is a basic work. It is significant for us to lengthen pipeline working life and enhance the operation reliability. In this article, the corrosive status and reasons for pipeline in China were narrated. The new anticorrosive coating that epoxy heavy anticorrosive over-rust primer/interpenetrating polymer network (IPN) topcoat was opened up. In the lab, the anticorrosive coating by analyzed with scanning electron microscopy (SEM), and X-ray photoelectron spectrum (XPS). The corrosion behavior of the new anticorrosive coating was studied. The conclusion is that the epoxy heavy anticorrosive over-rust primer/IPN topcoat is superior in anticorrosive properties.

Abstract: At home and abroad it was summarized that soybean protein-acrylates compound adhesive preparation methods, and soybean protein composite adhesive in the preparation of soybean protein surface modification, and focusesing on the most commonly used silane coupling agent and azo compounds two modified methods are introduced in this paper. Also introduced soybean protein composite adhesive in man-made board, paper and other industrial field, the application of composite material application prospect.

Abstract: Monoclinic Li3V2(PO4)3 was synthesized by a microwave method. The influence of sintering temperatures and time on the synthesis of Li3V2(PO4)3 was investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and charge-discharge test. The results of these tests shows that the Li3V2(PO4)3 sample synthesized at 850 °C for 15 min has pure and perfect crystal. The charge-discharge test shows the Li3V2(PO4)3 sample with optimal synthesis condition has the best initial discharge capacity of 120 mAh/g, with capacity retention of 101 mAh/g after 50 cycles, in the voltage range of 3.0 V–4.2 V.

Abstract: This paper introduced the outline of ASTM standard E826, elucidated the mathematical model and features of experimental designing of this standard. The advantages and disadvantages of this standard in practical application were clarified. Some supplements and improvements were proposed for the standard. The issue of local inhomogeneity was judged with statistical analysis method.

Abstract: As the main source of textile industrial pollution, printing and dyeing wastewater is usually difficult to be biodegraded. In this paper, a unique hydrolysis acidification reactor with double circulation sludge recycling system (DIC) is designed to treat simulated printing and dyeing wastewater. The results show that DIC reactor can realize quick startup with concentrated sludge of sludge concentration tank as inoculated sludge. And DIC reactor has high removal capabilities for CODcr and chroma, with efficiencies of about 70% and 60%, respectively. The sludge concentration is obviously increased. Moreover, the biodegradability of wastewater has been greatly increased to 0.38, which is favorable to the removal of organic pollutants in wastewater.