摘  要：预拌砂浆具有质量优良、减轻污染、生产效率高及可消纳大量固体废弃物等优势，近些年得到大量推广。碎屑是矿石开采产生的废渣，其排放量为碎石产量的20%～30%左右。本文分析了碎屑不同掺量对预拌抹灰砂浆的标准稠度用水量、强度等性能的影响，并对其耐久性如收缩率及抗冻性等进行了研究，从碎屑理化性质等方面论述了相应的作用机理，可为碎屑在预拌砂浆中的大规模应用提供理论依据和技术支持。Abstract：Dry-mixedmortarhasbeenusedwidelyduetoadvantagesofstablequality,lowpollutionandhighefficiencyaswellasabilityofdisposalofwastes.Clasticarebyproductsofstoneextracting,andtheamountisabout20%～30%oftheaggregate.Theinfluencesofclasticamountonthestrength,wateramount,andthedurabilitysuchasshrinkageandfrost-resistanceofready-mixedplasteringmortarareanalyzed.Meanwhilethemechanismisdiscussedbasedonthephysicochemicalpropertyofclastics.Theresearchcanoffersometheoryevidencesandtechnicalsupportforthescaleapplications.

摘  要：采用高温烧制工艺，研究了原材料、成型温度、加热时间、发光粉掺量对氧化条件下制备发光石性能的影响。结果表明，以100目SrAl2O4：Eu2+，Dy3+长余辉发光粉和低熔点硼酸盐玻璃粉为原材料，发光粉掺量为30%，温度800℃，加热时间为10min，制备的发光石表观质量、强度及发光性能良好。将该发光石作为骨料应用于混凝土中，可制备出具有照明与装饰功能的发光露骨混凝土。Abstract:Theluminousstoneispreparedbyusinghightemperaturefiringtechnology,andtheinfluencesofrawmaterials,processingtemperature,heatingtime,phosphorcontentonthepropertiesoftheluminousstonearestudiedunderoxidizingconditions.TheresultsshowthatwhentherawmaterialsisSrAl2O4:Eu2+,Dy3+longafterglowphosphorof100meshandlowmeltingborateglasspowder,phosphorcontentis30%,temperatureis800°C,andheatingtimeis10min,theluminousstonehasgoodapparentquality,strengthandluminousperformance.Usingtheluminousstoneasconcreteaggregate,theluminousexposedaggregateconcretecanbepreparedwithfunctionsoflightinganddecoration.

摘  要：以商洛钼尾矿为试验矿样，以氯氧镁水泥为胶凝材料，进行了制砖研究。通过MgO、MgCl2和钼尾矿等的混合，经搅拌、振动后制备免烧砖，研究了波美度和钼尾矿掺加量对免烧砖性能的影响，并分析了尾矿对免烧砖性能影响的机理。研究结果表明，当卤水波美度为28%，尾矿掺加量为80%时，性能较好，其28d的抗折强度和抗压强度分别为3.35MPa和9.28MPa。Abstract:UsingmolybdenumtailingsinShangluoasacoresampleandmagnesiumoxychloridecementascementitiousmaterials,thebanking-freebrickispreparedbymixingmolybdenumtailings,MgOandMgCl2,andthenvibrationandstirring.Theeffectsofmolybdenumtailingscontentand°Béofbrineonpropertiesofthebanking-freebrickandthemechanismarestudied.Theresultsshowthatwhenthemolybdenumtailingscontentis80%and°Béofbrineis28%,the28danti-pressurestrengthandflexuralstrengthofpreparedbanking-freebrickarerespectively3.35MPaand9.28MPa.

摘 要：结合工程实例，对高速公路改扩建中既有斜腿刚构天桥再利用的改造方案进行了探讨，介绍了几种基于体系转换的技术改造方案，并通过对比推选出优选方案：“双塔斜拉体系——单索+体外预应力”。理论分析与实践表明，体系转换法进行斜腿刚构桥梁改造是可行的。 Abstract: According to the engineering example, the technology reconstruction plan of the existing rigid frame bridge with inclined leg in the highway construction and expressway reconstruction is discussed, and several technical reconstruction schemes based on system transformation are introduced and compared. And an optimization scheme "the cable-stayed system with twin towers—single cable & external prestressing" is chosen. Theory analysis and practice show that the method of system transformation for reconstruction rigid frame bridge with inclined leg is feasible.

摘 要：利用工业废渣钢渣、矿渣、EPS颗粒、水泥及石膏等按一定比例拌和，生产新型自保温墙体材料，并将其应用到牧民定居工程中的“暖圈”建设。讨论了将复合保温材料在现场实际施工中的搅拌问题，并对复合材料在浇筑过程中施工质量控制的技术措施进行研究。 Abstract: A new type of self-insulation wall materials is produced by mixing a certain ratio of industrial waste slag, slag cement, plaster EPS beads and so on, and applied in the "warm circle" construction of herdsmen settlement project. The mixture stirring problems of composite insulation materials in the actual construction are mainly discussed and some technical measures for construction quality control of composite insulation materials are studied during in-situ casting.

摘 要：滑升模板机械化程度高、施工速度快、建筑物的整体性好，有利于加快工程进度、提升经济效益。在安阳世贸中心项目的应用实践中，针对关键施工技术中遇到的难题，对施工工艺、设备构件等进行了技术改进，可为滑模技术在高层框筒结构施工中的应用提供借鉴。 Abstract: The sliding formwork has a high degree of mechanization, construction speed and buildings integrity, which will accelerate the construction progress and improve economic efficiency. So the technology is applied in Anyang world trade center project. In the process of practical application, several technical improvement measures are put forward in view of the problems in the key construction technology. It can provide a reference for the construction of the high-rise frame tube structure.