冷再生结构层力学响应分析

通过研究冷再生结构层受力分析,在室内试验数据基础上,采用有限元BISAR软件对冷再生结构层以及常规半刚性路面结构层进行力学响应分析,得出了常规半刚性基层与冷再生基层力学响应的差异、冷再生层合理厚度、冷再生基层路面铣刨深度以及冷再生基层路面的使用条件.该研究对冷再生结构层设计与施工具有一定的借鉴作用.     

假颗粒现象及其对再生铝镁碳制品性能的影响

对用后铝镁碳砖再生颗粒料的组成和结构特点进行显微分析,并通过改变混料方式以及不同粒度再生料的加入量研究假颗粒对再生铝镁碳制品结构与性能的影响。结果表明：用后铝镁碳砖再生料中含有约40%与废砖相组成和结构相似、骨料与基质并存于同一颗粒的二次颗粒,即所谓的＂假颗粒＂,假颗粒的组成、结构及外形的均匀程度均远不如一次骨料颗粒;混碾可使用后铝镁碳砖再生料中假颗粒发生二次破碎,且粒度越大,发生二次破碎的颗粒数量越多;假颗粒二次破碎导致再生制品的粒度组成发生改变,进而影响其密度和耐压强度。     

中水回用技术的发展及现状

介绍了中水回用的意义,一些常见的中水处理工艺,国内中水回用的应用实例.说明中水回用在我国有广阔的前景,推广中水回用技术有利于提高了水的重复利用率,节约了宝贵的水资源.     

基于循环经济理念的企业绿色物流

在分析了循环经济和绿色物流之间相互促进关系的基础上,从绿色运输、绿色仓储、绿色包装、绿色流通加工、绿色搬运装卸、绿色信息处理六个方面进行研究,构建出了循环绿色物流体系,提出了加强政府职能的发挥,制定法规和标准体系,加强舆论宣传等促进体系实施的保障措施。     

采用磁选和重选回收废旧电路板中的金属

采用磁选和重选联合工艺回收废旧印刷电路板中Fe、Cu、Al、Pb、Zn、Sn和Ni等金属。结果表明,采用干法磁选工艺,可回收的铁磁性物质约占废旧电路板质量分数的8．23％,重液分选可使金属与非金属有效分离,采用磁选和重选联合工艺可使Fe、Cu、Pb、Zn、Ni和Sn的回收率分别达到约100％、80％、65％、75％、88％和56％。     

Preparation of composite particles made from solid powders and wasted plastics by semichemical recycle method

Composite particles composed of solid powders and polymer were prepared by semichemical recycle of wasted plastics. Waste expanded polystyrene was used as raw materials of polymer matrix of composite particles. Both magnetite and silicon carbide powders were used as solid powders to give thermal and electric conductivity and magnetization, respectively. In the experiment, the oil‐phase dissolving expanded polystyrene was dispersed in fine droplets into the continuous water phase. Two kinds of powders were added at the same time or separately in the O/W dispersion. Composite particles were found to have the structure that polymer particle was covered with two kinds of solid powders. The mean diameter of composite particles and the content of each solid powder were strongly affected by the addition time when silicon carbide powder was added into the dispersion. Furthermore, it was found that the gradient adhesion layer due to two solid powders was able to be formed on the surface of polymer particle. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 483–488, 2003     

上海市废弃混凝土来源与回收前景

对上海市废弃混凝土的产生来源及其数量进行了调查,并预测了未来10年内由于住宅建设产生的废弃混凝土数量.结果表明,旧建筑物的拆除和市政工程的动迁及重大基础设施的改造是废弃混凝土产生的主要来源.未来10年内,每年仅由住宅拆迁和新建产生的废弃混凝土量就可达1390万t.最后,还从天然砂石集料资源、人口密度和工业化发展水平等方面对上海市废弃混凝土的回收前景作了初步分析.     

关于加快我国石油和化学工业走循环经济之路的思考

论述了我国石油和化学工业“五大六低”的矛盾,即:产量大,企业数量大,职工队伍大,资源与能源消耗大,环境污染大;劳动生产率低,集约化程度低,科技含量低,石油和化学品性能低,市场应变能力低,经济效益低的矛盾。现状决定了石化工业必须加快循环经济的发展,提出了推动我国石油和化学工业走循环经济之路必须采取的对策和建议。     

Mechanical characterization and chemical resistances of cured unsaturated polyester resins modified with vinyl ester resins based on recycled poly(ethylene terephthalate)

Unsaturated polyester resin (UP) was prepared from glycolyzed oligomer of poly(ethylene terephthalate) (PET) waste based on diethylene glycol (DEG). New diacrylate and dimethacrylate vinyl ester resins prepared from glycolysis of PET with tetraethylene glycol were blended with UP to study the mechanical characteristics of the cured UP. The vinyl ester resins were used as crosslinking agents for unsaturated polyester resin diluted with styrene, using free‐radical initiator and accelerator. The mechanical properties of the cured UP resins were evaluated. The compressive properties of the cured UP/styrene resins in the presence of different vinyl ester concentrations were evaluated. Increasing the vinyl ester content led to a pronounced improvement in the compression strength. The chemical resistances of the cured resins were evaluated through hot water, solvents, acid, and alkali resistance measurements. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3175–3182, 2007     

废旧轮胎综合利用现状简介

本文主要介绍了目前国内外废旧轮胎资源的综合利用情况，简要分析了我国废旧轮胎行业存在的问题并提出了相关措施。对我国发展循环经济，实施可持续发展战略具有重要的现实意义。