废弃混凝土中基质胶凝组分作水泥混合材料的研究

采用热处理和加入表面活性剂的方法将废弃混凝土中的骨料与基质胶凝组分进行分离。将分离出的基质胶凝组分（FWC）按照不同配合比掺入水泥熟料中粉磨不同时间测试其性能。结果表明：FWC的易磨性优于水泥熟料，FWC具有较强的水化能力和较好的胶凝性，可以作为一种水泥混合材料。     

热处理-机械粉碎法分离废弃混凝土中骨料与基质胶凝组分

利用热处理与机械粉碎相结合的方法进行了废弃混凝土中骨料与基质胶凝组分的分离试验研究。将废弃混凝土在150℃,250℃,350℃和500℃下进行热处理，然后分别在球磨机和振动磨中粉碎，考察了骨料与基质胶凝组分的分离效率，并分析了骨料与基质的分离机理。试验结果表明。随着热处理温度的提高，分离效率显著提高；热处理温度较低时，球磨粉碎的分离效率高于振动粉碎，但500℃热处理后，振动粉碎的分离效率高于球磨粉碎。     

利用废弃混凝土制备再生胶凝材料

为了提高废弃混凝土再生资源的利用效率,提出实现各组分高效再生利用技术路线和方法.将分离出来的水泥石组分经过低温煅烧处理,制备得到可再次水化并形成胶凝能力的再生胶凝材料.利用X射线衍射、扫描电子显微镜、力学测试等手段对其矿物组成、水化硬化过程等进行了研究.实验结果表明:不同煅烧温度下制备得到的再生胶凝材料矿物组成及其结构不同,使其水化活性存在差异.其中在650℃煅烧得到的再生胶凝材料以不完全结晶的β-C2S矿物相为主要成分,具有优良的水化胶凝能力.     

混凝土化学组成对其抗折性能试验研究

混凝土化学组成的研究,对提升水泥混凝土强度有着十分重要的作用。主要研究了胶凝材料体系的硅酸盐水泥的化学组分与其相对掺量、还有配合比对混凝土强度的影响。综述了不同胶凝材料的化学组成与其反应机理,要特别说明的是C_3S和4CaO·Al_2O_3·Fe_2O_3的含量对强度的影响最大。水泥熟料发生的水化反应得到的水化产物,也对其产生了一定影响。通过优化胶凝材料不同的化学组分掺量,可以有效提高水泥混凝土强度。     

分解炉内煤矸石悬浮煅烧的数值模拟

煤矸石制备水泥辅助胶凝材料的应用研究对水泥行业的节能减排与大宗固废的高值利用均具有重要意义。本文以河北某地不同矿区的6种煤矸石为原料，采用XRD，热重等方法分析判断其化学成分和矿物组成，通过静态煅烧实验研究了其煅烧活化条件，并通过胶砂实验测定其胶凝活性。结果表明，煅烧温度和时间会影响产品的胶凝活性，煤矸石经过适当的热处理后，可用作辅助胶凝材料替代部分水泥熟料，在实现煤矸石资源化利用的同时，也为水泥工业碳减排提供了新路径。但煤矸石成分复杂，活化煅烧需要注意煅烧制度。采用CPFD（Computational Particle Fluid Dynamics）数值模拟方法模拟了分解炉内煤矸石传热、传质及化学反应，分析了不同工况下分解炉内气固两相流场。结果表明：入炉空气的温度较低时无法点燃煤矸石中的可燃组分，通过高温烟气点火和分级司料可有效解决这一问题。     

低温合成煤矸石水泥的研究

试验采用低温合成方法将煤矸石制成低温合成煤矸石水泥熟料，采用XRD分析、力学性能测定等测试方法．研究了熟料的矿物组成与水泥的物理性能。结果表明：采用水热合成低温煅烧工艺生产低温合成煤矸石水泥这一技术路线是可行的．该技术具有煅烧温度低、煤矸石用量大等特点，合成熟料的胶凝矿物主要为β-C2S和C2A7，因此该种水泥具有快凝、早强等特点：将低温合成煤矸石水泥与硅酸盐水泥按适当配比掺合，可以得到早期强度更高的特种煤矸石水泥。     

掺杂锶对高阿利特水泥熟料制备及性能的影响

采用正交试验方法研究了煅烧温度、保温时间及掺杂氧化锶和硫酸锶对高阿利特水泥熟料煅烧与性能的影响.借助于XRD和SEM-EDS等测试方法研究了水泥熟料的组成、结构及水泥性能.结果表明,高阿利特水泥熟料的最佳制备条件是煅烧温度为1450℃,保温时间为60min,氧化锶和硫酸锶的适宜掺量分别为1.5％、0.5％.在熟料中掺入氧化锶和硫酸锶可以促进阿利特矿物的形成,有利于水泥强度的提高.掺加适量氧化锶时,水泥的早期强度明显提高;而掺加硫酸锶时,有利于该水泥后期强度的提高.     

赤泥用作高性能水泥性能调节组分的研究

采用化学活化和热活化的方法,对赤泥进行预处理后再与硅酸盐水泥熟料配合,在实验室条件下就不同化学试剂处理、不同温度下加热处理和不同掺量的赤泥-硅酸盐水泥熟料体系的胶凝性能进行了系统的试验研究。结果表明,未经任何处理的赤泥掺入水泥后,尤其是赤泥掺量大于20%时,水泥砂浆后期强度显著降低,而经特定化学试剂处理和一定温度煅烧处理后的赤泥掺入水泥熟料后,水泥砂浆的后期强度降低幅度得到明显减缓。     

铜渣作为铁质原料制备高强度水泥的研究

采用硫酸渣、转炉渣和铜渣三种工业废渣制备水泥,研究对比其易磨性、显微结构和矿物组成,并初步探讨了铜渣制备高强度水泥的作用机理。结果表明:在同粉磨条件下,铜渣水泥的易磨性较好,其28 d强度高达67.6MPa。在1450℃高温煅烧下,相对于转炉渣熟料和硫酸渣熟料而言,掺入铜渣后煅烧得到的熟料矿物晶体自形程度较好,C3S矿物含量较多,为进一步研究铜渣组分与熟料成分反应的作用机理提供依据。     

镁渣配料煅烧水泥熟料的性能研究

试验了镁渣取代石灰石煅烧水泥熟料对生料易烧性及熟料各项性能的影响,并对影响机理进行了分析。结果表明,15%镁渣取代石灰石,煅烧温度1450℃,时间30min,熟料的各项性能满足标准。机理分析表明,这与镁渣中含有较高的CaO和SiO2及主要矿物成分为C2S有关,促进了生料的易烧性。     

Two component hydrogels

Summary This and the subsequent papers concern with two component hydrogels, consisting of a polymer backbone built up by one polymer component, which is crosslinked by bridges of another polymer with varying length. In order to understand the effects of the crosslinker chain length on the networks as a whole the thermodynamic interaction parameters for the system, with special reference to the swelling behaviour, have to be determined first. By adapting and extending Sakurada' s method the equations of state for the ternary system waterlinear crosslinker- one component gel are developped first.     

Local component based principal component analysis model for multimode process monitoring

For plant-wide processes with multiple operating conditions,the multimode feature imposes some chal-lenges to conventional monitoring techniques.Hence,to solve this problem,this paper provides a novel local component based principal component analysis(LCPCA)approach for monitoring the status of a multimode process.In LCPCA,the process prior knowledge of mode division is not required and it purely based on the process data.Firstly,LCPCA divides the processes data into multiple local components using finite Gaussian mixture model mixture(FGMM).Then,calculating the posterior probability is applied to determine each sample belonging to which local component.After that,the local component information(such as mean and standard deviation)is used to standardize each sample of local component.Finally,the standardized samples of each local component are combined to train PCA monitoring model.Based on the PCA monitoring model,two monitoring statistics T2 and SPE are used for monitoring multimode pro-cesses.Through a numerical example and the Tennessee Eastman(TE)process,the monitoring result demonstrates that LCPCA outperformed conventional PCA and LNS-PCA in the fault detection rate.     

单组分聚氨酯胶黏剂

概述了单组分聚氨酯胶黏剂的研究进展，着重介绍了湿固化型、热熔型、封闭型单组分聚氨酯胶黏剂的主要特点、反应原理、研制现状和应用情况，指出湿固化型、热熔型等环保型单组分聚氨酯胶黏剂是今后发展的重点。     

电器元件涂料

0304105家用电器涂料:eNI 397 599A[中国发明专利申请公开」/中国:广州擎天油漆化工实业有限公司(陈伟等卜2003.2.19,一01 127 628.2(2001.7.16);IPCC09D5/00〕304106中国彩电显象管导电涂料及发展概况吁d]/倪志衡刀仁海涂料一2003,41(3)一15一]6电器元件涂料     

Two component polymer membranes

We prepared membranes from synthesized grafted polymers consisting of hydrophobic macromolecules and hydrophilic grafts. We studied especially polyacrylic acid (PAA) grafted on polypropylene (PP) and on ethylene-propylenediene rubbers (EPDM). From a technological point of view, the PP grafted membranes can be classified in three groups: membranes obtained from solution, from bioriented films and from not oriented films. EPDM grafted membranes were prepared from solution.The structure of membranes from solution is characterized by spheroidical domains (diameter ? 5.10^-2μm) situated in a rigid or elastomeric matrix. Good salt rejections can be obtained in the case of grafted PP with small fluxes and high thickness. Ultrafiltration of molecules larger than NaCl can be successful when using low thickness rigid membranes, with high fluxes. Elastomeric membranes, which show a low water permeability, do not allow any flux under pressure.Bioriented PP films after grafting show a layer-like structure with detached layers, partially fractured. This structure allows very small fluxes.The original band-like structure of not oriented PP films is heavily modified by grafting: the resulting structure is characterized by a uniform distribution of PAA, which allows the best salt rejection of all our membrane types, but with rather small fluxes.We explain the behaviour of the membranes from solution, using a mechanical model based on a single swelling sphere immersed in a rigid or elastomeric matrix. Internal stresses due to the PAA swelling are calculated and related to water adsorption. Calculated internal stresses justify fracture in the rigid matrix, thus allowing high fluxes, but not in the elastomeric matrix; this explains its very low permeability.Consequence of the existence of microfractures in the rigid matrix is the high dilatation rate of these membranes when immersed in water: the elastomeric membranes show a much lower dilatation rate.A mathematical model is proposed which relates the elongation to the diffusion coefficient of water and of salt both in the rigid and elastomeric membranes. Diffusion water coefficient is of the order of 10^-8 cm² s^-1 and 10^-10 cm² s^-1 respectively in the rigid and elastomeric membranes. Salt diffusion coefficient is of the order of 10^-12 cm² s^-1 in both cases.     

电器元件涂料

0303 165具有优异耐久性和释色性的导电涂料组合物:Jp20oZ一284 949[日本专利公开]旧本:肠kaiRubber Industries,Ltd.(Arimura,ShOJi等)一2002.10.3一14页一2001/88963(2001.3.27);IPCCOSL27八2 适用于电子照片延展卷轴的题述组合物包括:(A)一种含偶氮基的硅氧烷聚合物一丙烯酸单体嵌段共聚物作为基本成分、(B)一种氟化的烯烃树脂和(C)一种导电体例如,一种丙烯酸丁醋一甲基丙烯酸一2一轻乙醋一甲基丙烯酸甲醋一VPS 0501嵌段共聚物50份与50份Kynar 7201和10份Denka Blaek HS100混合,制得导电表面涂料,具有优异的滤色性、拷贝成像…