Effects of Steel Fibers and Iron Filings on Thermal and Mechanical Properties of Concrete for Energy Storage Application

An experimental study on the thermal properties of iron filings and steel-fiber-reinforced concrete for solar/thermal energy storage application is presented in this report. It takes into account the results of measurements of thermal conductivity, thermal resistivity, thermal diffusivity and the results of compressive strength, density as well as energy storage capacity calculated from the knowledge of the above measured parameters. The experimental testing method is described as well: based upon the linear heat source theory, it requires the use of a special probe to be inserted into the sample. The experimentation was forwarded to test concrete aggregate mixtures with three different sizes and same quantity of steel fibers;two different quantities of iron filings and one plain concrete. The measurements were carried out from the pouring time of cubic samples and were ended up when hardened conditions were achieved. The results indicate that the steel fibers and iron filings have influence on the thermal and mechanical properties of the concretes tested, thus the iron filings and steel fibers reinforced concrete is suitable for better solar/thermal energy storage due to an increase in storage capacity over plain concrete.

多源流理论下辽宁省教师科研诚信政策变迁研究

科研诚信是科研工作能够有序开展的重要保障。为进一步推进辽宁省教师科研诚信政策建设制度化、科学化、规范化,本文运用多源流理论对2018~2022年辽宁省教师科研诚信政策的变迁历程进行系统性梳理,动态分析高校教师科研诚信政策发展变化趋势,从聚焦问题导向、重视政治方向、丰富政策源流和开启政策之窗四个方面,提出教师科研诚信政策制定的策略建议,健全完善辽宁省教师科研诚信政策制度机制,为辽宁省建设“科技强省、科技强校”提供有力保障。