CPN车辙仪用于评价高等级沥青路面高温性能的研究

介绍了CPN这种便携式车辙仪的性能参数和与现有车辙试验机的区别,并通过材料试验评价CPN车辙仪用于高等级沥青砼路面高温性能评价的适用性,并尝试得出与常规车辙试验动稳定度一致的计算公式.通过研究发现,CPN车辙仪用于沥青混合料高温稳定性的评价是可行的.     

基于集合覆盖模型的报废汽车回收点选址优化研究

报废汽车是重要的再生资源,为了提高报废汽车的回收利用率,实现其经济价值和资源环境价值,需要构建高效率、高效益的报废汽车逆向物流网络,而报废汽车回收点的选址对整个网络的运作有重大影响。本文以成都市为例构建了报废汽车回收点选址优化的集合覆盖模型,然后针对该模型设计了相应的算法,并对模型进行了分析和验证。     

钢铁表面热浸镀铝技术回顾

综述了热浸镀铝技术的发展现状和热浸镀铝的工艺过程及特点，分析了镀铝层的结构和形成机理，阐述了镀铝层、Fe-Al金属间化合物层厚度及铝中Fe含量的控制方法，对镀铝层的表面质量控制、热浸镀铝件的主要性能特点及其热浸镀铝技术的应用都进行了介绍。     

堆焊热轧传送辊热疲劳试验机控制器研制

简要介绍了堆焊热轧传送辊热疲劳试验机的机械部分原理，着重介绍用于该试验机控制器的研制．控制器采用8031单片机．介绍了其硬件电路的组成，编制了相应的软件．通过安装调试证明，研制的控制器能自动记录热疲劳试验次数，能抗1000Hz中频感应加热电源的干扰，运行可靠，可应用于堆焊热轧传送辊的热疲劳试验机上．     

Phase transitions relating to the pozzolanic activity of electrolytic manganese residue during calcination

Electrolytic manganese residue（EMR） is generated from electrolytic manganese metal（EMM） industry, and its disposal is currently a serious problem in China.The EMR were calcined in the interval 100—900℃to enhance their pozzolanic activity and characterized by the differential thermal analysis-thermogravimetry（TGDTA）, X-ray diffraction（XRD）,infra-red（IR） and chemical analysis techniques with the aim to correlate phase transitions and structural features with the pozzolanic activity of calcined EMR.Prom the phase analysis and compressive strength results,it is found that the EMR calcined within 700—800℃had the best pozzolanic activity due to the decomposition of poorly-crystallized CaSO₄ under the reducing ambient created by the decomposition of（NH₄）₂SO₄.The appearance of reactive CaO mainly contributes to the good pozzolanic activity of EMR calcined within 700—800℃.The crystallinity of Mn₃CO₄ increases leading an unfavourable effect on the pozzolanic behaviour of EMR calcined at 900℃.The developed pozzolanic material containing 30%（mass fraction） EMR possesses compressive strength properties at a level similar to 42.5^# normal Portland cement,in the range of 41.5—50.5 MPa.Besides,leaching results show that EMR blend cement pastes have excellent effect on the solidification of heavy metals.     

Friction and wear performances of hot filament chemical vapor deposition multilayer diamond films coated on silicon carbide under water lubrication

Tribological properties of chemical vapor deposition (CVD) diamond films greatly affect its application in the mechanical field. In this paper, a novel multilayer structure is proposed, with which multilayer diamond films are deposited on silicon carbide by hot filament CVD (HFCVD) method. The different micrometric diamond grains are produced by adjusting deposition parameters. The as-deposited multilayer diamond films are characterized by scanning electron microscope (SEM) and white-light interferometry. The friction tests performed on a reciprocating ball-on-plate tribometer suggest that silicon carbide presents the friction coefficient of 0.400 for dry sliding against silicon nitride (Si₃N₄) ceramic counterface. With the water lubrication, the corresponding friction coefficients of silicon carbide and as-deposited multilayer diamond films further reduce to 0.193 and 0.051, respectively. The worn surfaces indicate that multilayer diamond films exhibit considerably high wear resistance.     

沥青路面材料的再生利用及典型设备设计

在道路日常维护和翻新工程中,大量沥青混凝土废旧材料的产生是必然的,而旧材料的再生工艺及专用设备的性能直接关系到再生路面路用性能的优劣。     

水泥全深式就地冷再生基层应用研究

结合全深式就地冷再生基层在霍侯一级路路面改造工程的成功运用,简要介绍了全深式就地冷再生的技术原理和混合料的配合比设计及施工工艺,分析了该技术的经济和社会效益。结果表明:全深式就地冷再生基层技术节能环保、工期短、造价低,具有良好的经济和社会效益。     

锦州机务段DAF污水处理器的性能及效果分析

锦州机务段利用世界银行贷款引进美国DAF污水处理器。该设备具有技术先进，结构紧凑，污染物去除率高，故障少，耐腐蚀，能耗低等特点。经运行，该段实现了污水低质回用和达标排放，为我国污水处理设计提供了新思路。     

沥青路面冷再生技术初探

沥青路面再生利用,能够节约大量的沥青、砂石等原材料,同时有利于处理废料、保护环境.根据国内外沥青再生技术的发展应用情况,探讨热再生技术的性能和特点.