Strengthening reinforced concrete beams using prestressed glass fiber-reinforced polymer-Part I： Experimental study

INTRODUCTION The aging or deterioration of existing R. C.(reinforced concrete) or P. C. (prestressed concrete)structures is one of the major problems that modernengineers have to face. If the flexural or shear strengthof R. C. or P. C. structures is not sufficient to maintaintheir service functions, strengthening of these struc-tures becomes necessary. To date, steel plates havebeen used to strengthen concrete members. Usingcomposite plates to strengthen R.C. or P.C. structures…     

关于纳米抗菌陶瓷的研究

随着我国经济的发展和人民生活水平的提高,人们的环境意识有了很大的改变,对陶瓷的性能也提出了进一步的要求。纳米与抗菌技术相互结合应用在陶瓷生产中,将极大地改善传统陶瓷的性能。本文主要介绍其抗菌机理及在国内外陶瓷生产中的应用现状,并探讨了纳米抗菌技术在陶瓷生产中存在的问题以及抗菌纳米陶瓷的发展前景。     

冷加工技术改变玻璃材料质感及触感

玻璃在其起源时代已经是一种艺术性的物质,人们利用它晶莹透亮,冷峻而坚固,同时具有折光反射的特点在艺术创作上达到变幻莫测、难以预想的艺术效果。玻璃艺术的技术实践部分主要分为三类：热加工技术、冷加工技术、玻璃与综合材料结合技术。其中当玻璃处于固态冷却阶段时,较之热融状态与其它材料相结合的限制条件相对更少．方式更为多元。文章从玻璃艺术冷加工的门类出发,阐述了不同冷加工方法的功效和科学操作规程及注意事项,并结合当代玻璃艺术的最新动态,介绍了综合材料与玻璃连接的广义冷加工方式,由此进行冷加工的个人艺术实践。     

喷雾热解法制备SnO2薄膜的结构及性能研究

采用喷雾热解法,在玻璃基板上制备了辐射率较低的SnO2薄膜。利用紫外可见光分光光度计、XRD等手段,研究了沉积温度、液流量对薄膜结构及光电性能的影响。结果表明,沉积温度为520℃、液流量为1.30mL/s时,薄膜具有较佳的电学、光学性能,透过率为80%,电阻率为7×10-4Ω.cm。     

燃烧合成制备Cf/TiC-TiB2复相陶瓷的可行性分析

拟制备碳纤维补强增韧的Cf/TiC-TiB2陶瓷基复合材料,实验前理论分析了TiC、TiB2和碳纤维三相间的物理匹配性和化学共存性,对工艺的可行性进行了详细阐述。分析结果表明燃烧合成制备Cf/TiC-TiB2复相陶瓷制工艺合理,符合复合材料的设计原则。     

Dimensional Stability and Moisture Properties of Gap-Fillers Based on Wood Powder and Glass Microballoons

ABSTRACT

Conservation of wooden objects exposed outdoors is extremely difficult and complex due to their constant exposure to fluctuating weather conditions and biological degradation. Filling the gaps in such objects requires the use of specific materials that in particular can adapt to changes in wood dimensions in response to humidity variations. Various materials have been used so far for filling voids in wooden artefacts but none of them was entirely suitable. Therefore, the authors have attempted to provide the basic characteristics of the selected commonly used filling materials based on pine wood powder or glass microballoons as fillers and Paraloid® B-72, Klucel® G, or glutin glue as binders, as the first step in research aiming at developing new and more appropriate gap-fillers. Special attention was paid to the dimensional stability of filling materials upon drying and exposure to water vapour and liquid water. The overall results indicate that among the examined fills those consisting of Paraloid® B-72 and glass microballoons revealed best properties as they were relatively dimensionally stable upon drying and exposure to moisture – despite high absorption of water – and were quite easy to finish. Generally, better properties were observed for filling materials containing higher concentrations of adhesives and these materials will be modified in the next step of the research. Since the main drawbacks of the examined gap-fillers were low water resistance, poor dimensional stability upon drying or exposure to water vapour or liquid water, and fragility or friability, future research into their modification will head towards improvement of the above-mentioned properties.     

基于数值分析的曲面玻璃幕墙支撑体系设计

梅花形曲面玻璃幕墙的设计为无锡新区科技交流中心工程项目的难点之一。采用0-4评分法综合评分选定＂刚性挑梁支撑体系＂为曲面玻璃幕墙的支撑体系实施方案。应用SAP2000有限元分析软件,进行7种工况条件下的数值分析,依据内力和变形的分析结果,进一步进行幕墙节点和面板系统的设计,确保曲面玻璃幕墙的支撑结构体系顺利实现。     

烟气净化多孔陶瓷过滤技术探析与创新

工业生产废气对大气造成较为严重的污染,其主要是硫化物、氮化物的排放量超标。WK陶瓷催化剂袋式脱硫脱硝、除尘一体化烟气净化技术,是一项具有国际创新的系统集成技术,通过单一的单元控制过程,同步去除烟气中的硫氧化物、氮氧化物、氯、氟和灰尘,高效取代传统三步式组合工艺,具有显著优点,可以很好地解决窑炉烟气排放不达标的问题。     

功能陶瓷研究进展与发展趋势

简要评述了陶瓷基板,微波介质陶瓷,铁电压电陶瓷,半导体陶瓷,铁电薄膜和智能材料等功能陶瓷的研究进展和发展趋势,对我院功能陶瓷的发展提出了一些建议。     

Al_2O_3系纳米陶瓷抗拉强度

利用纳米氧化铝基粉末压制烧结制成纳米陶瓷,研究陶瓷制品抗拉强度与粉末配比、烧结温度的关系,得到了烧结品的抗拉强度与有关工艺参数的关系,为工业化生产奠定了基础