Key Engineering Materials Vol. 492

Abstract: A kind of silicone modified by epoxy resin was synthesized by chemical reaction which were characterized and confirmed with FIIR. The changes of the contact angle, glass transition temperature and microstructure of the resin modified with epoxy were studied. The results showed that there was little change on the contact angle of the resin film, there was a slight increase on Tg of the resin and homogeneous phase structure was remained after modification. It was also found that while the content of the epoxy was increased, the roughness of microstructure of the epoxy modified silicone resin was increased and the surface contact angle was rose.

Abstract: Through collecting and analyzing thermal data from on-site testing of more than 30 cement plants, combining with design indicators of production line and control parameters in practical operation, the paper has summarized 4 first level, 5 second level and 133 third level energy efficiency evaluation indicators of cement enterprises after an in-depth study on the main factors influencing coal and power consumption of cement plants. On this basis, an energy efficiency evaluation system of new suspension preheater cement enterprise is to be established in China. It is expected to provide cement enterprise the basis of mastering the level of energy management and checking questions of energy utilization, to play guiding functions in settlement of energy-saving measures, development of energy-saving potential and reduction of energy consumption.

Abstract: This article presents a new kind of photovoltaic window - Air-cooling PV double-glass window. The structure and principle of air-cooling PV double-glass window is introduced. The study pointed out that photoelectric transformation efficiency of photovoltaic cells h_pv is an important parameter to evaluate the electric performance of PV systems, and also gives a expectation on future work.

Abstract: Chinese listed ceramic companies grow slowly these years. They cannot compete with world-famous companies in the international market. Using SWOT method for analysis, we see the opportunity of the industry lies in the huge inner and outer market space. While the main weakness points are short of innovation and technical personnel. The threats are the changed market conditions and the strength lies in the production capacity. In the end, we put forward two suggestion, they are setting up holistic ceramic industry and stimulating inner and outer sales through detailed market segments.

Abstract: In this paper, changes of resistivity of carbon fiber reinforced cement (CFRC) under cyclic load at different stress levels (15%, 35% and 55% of the failure stress) were studied. Experimental results showed that resistivity decreased with the increasing stress and increased with the decreasing stress under cyclic compression load. The resistivity of CFRC was reversible and cyclic under cyclic load at low stress level. When stress increased to a certain value, the decreasing rate of resistivity with increasing stress slowed down. When stress increased further, CFRC specimen resistivity cannot return to the initial value, showing a certain irreversible behavior. The feasibility of CFRC used in testing concrete fatigue was also discussed based on the conducting mechanism of CFRC.

Abstract: With liquid as transmission medium, using ultrasonic precision measurement, an effective device was studied and developed for monitoring early age shrinkage of concrete. With it, shrinkage of concrete in the plastic stage could be accurately monitored. During the measurement, 0.01mm and even higher monitoring accuracy could be achieved.