第六期_2015_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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第六期

高含泥尾矿碎屑在预拌砂浆中的应用研究

王娟，赵立群，陈宁

２０15年第6期

摘要

引用本文

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.

环保节能型发光混凝土材料的研制

陈景，王晶晶，徐芬莲，卢佳林，甘戈金

２０15年第6期

摘要

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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.

掺钼尾矿氯氧镁水泥免烧砖的制备

李春，崔乐，周春生，崔孝炜，王之宇，郭家林

２０15年第6期

摘要

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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.

体系转换法在斜腿刚构桥改造中的应用研究

崔贵云，王永峰，贾辉，陈金涛

２０15年第6期

摘要

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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.

钢、矿渣-EPS颗粒复合保温材料现浇施工质量控制

冯勇，肖磊，晋强，何金春

２０15年第6期

摘要

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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.

高层框筒结构滑模施工技术的改进

张晓兵1，张小富1，张薇2

２０15年第6期

摘要

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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.

南京地区夏季复合相变混凝土砌块运用效果研究

张维维1，程建杰1，张源2，庄孙歧1，何嘉鹏1

２０15年第6期

摘要

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摘要：在混凝土砌块中填入相变石膏板，构成复合相变混凝土砌块，将其运用到建筑外墙中。在实验室搭建变温热箱实验装置，通过实验与模拟验证焓法模型在计算相变传热时的可行性，并运用焓法模型计算分析由复合相变混凝土砌块砌成的建筑外墙的热工特性。研究表明，用焓法模型计算得到的模拟值与实验值的误差不超过5%。通过焓法模型计算分析得到，当室内空调定温为26℃时，相变石膏板相变温度为26℃节能效果最佳，将这种相变石膏板放置在混凝土砌块外侧孔中，相变外墙房间节能59.1%，节约电费61.4%；放置在砌块内侧孔中，相变外墙房间节能45.3%，节约电费48.2%。 Abstract: Composite phase change concrete blocks applied in building exterior walls are formed by putting phase change plasterboard in concrete block. The enthalpy method is used to simulate and calculate, the variable temperature hot box is used to validate the accuracy of the enthalpy method, and the thermal performance of the exterior wall built with composite phase change concrete blocks is calculated using the enthalpy method. The results show that it’s concluded that the relative error of calculating phase change heat transfer by the enthalpy method is no more than 5%. When the indoor air conditioning temperature is 26 ℃ constantly and the phase change temperature of phase change plasterboard is 26 ℃, the energy-saving effect is the best. When putting this kind of phase change plasterboard in the outside layer of concrete block, 59.1% of energy and 61.4% of power are saved; when putting it in the inside layer of concrete block, 45.3% of energy and 48.2% of power are saved.

聚氨酯对蒸压加气混凝土性能影响的研究

李梅时1，孙小巍1，吴陶俊2

２０15年第6期

摘要

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摘要：通过对聚氨酯蒸压加气混凝土性能的测试，研究了聚氨酯掺量对蒸压加气混凝土比强度、吸水率、抗冻性的影响。并利用X射线衍射和扫描电镜等分析方法分析了不同聚氨酯掺量下的蒸压加气混凝土的水化产物和结构特点。研究发现：聚氨酯能提高蒸压加气混凝土的比强度；聚氨酯的掺量在6%左右，比强度有显著提高；聚氨酯掺量在6%左右对抗冻性有显著改善，15次冻融循环后的质量损失率和强度损失率分别为3.249%和16.43%；水化产物以托勃莫来石和C-S-H为主；加入聚氨酯后没有引起蒸压加气混凝土表观密度的明显增加。 Abstract: Through the physical properties test of polyurethane autoclaved aerated concrete, the influence of different polyurethane content on strength, water absorption, frost resistance of autoclaved aerated concrete is studied. The hydration products and structural characters of autoclaved aerated concrete with different content are analyzed by XRD and SEM. The experimental results show that polyurethane can enhance the strength of autoclaved aerated concrete, and the strength is enhanced obviously when the polyurethane content is 6%; the frost resistance is improved obviously when the polyurethane content is 6%, and the mass loss rate and strength loss rate after 15 times freezing-thawing cycles are 3.249% and 16.43% respectively; the hydration products mainly contain tobermorite and C-S-H; the apparent density of samples are not increasing obviously when polyurethane is used.

掺合镀铜钢纤维砂浆性能试验研究

岳红亚1,2，张宏博1,2，解全一1,2，孟庆宇1,2

２０15年第6期

摘要

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摘要：研究了一种以镀铜钢纤维为导电材料的屏蔽砂浆，并分别测定了纤维掺入法和满铺法砂浆的力学性能、导电性能和电磁屏蔽效果SE（Shieldingeffectiveness）。研究结果表明：金属纤维能够提高砂浆力学性能和导电性能，随着纤维掺量的增加，纤维掺入法砂浆抗折强度较普通砂浆提高约14.2%～17.8%，抗压强度提高约7.3%～23.1%；镀铜钢纤维能够提高砂浆的SE，纤维掺入法最优纤维体积分数为1%，采用满铺法制作的纤维布砂浆SE在各个频段范围内均高于纤维砂浆，在200～1500MHz范围内增幅约20dB，最大SE为-51.52dB，研究结果对电磁屏蔽砂浆在民用建筑中的推广具有一定的指导意义。Abstract：Akindofshieldingmortarwithcopperplatingmetalfiberasconductivematerialisstudied,andthemechanicalproperties,electricalconductivityandtheelectricalshieldingeffect(SE)ofshieldingmortarusingfiberincorporationmethodandfull-pavemethodmortarrespectivelyaremeasured.Theresultsshowthatthemetalfibercanimprovemechanicalpropertiesandelectricalconductivityofmortar.Comparedwithordinarymortar,withtheincreasingoffibercontent,theflexuralstrengthofthemortarwithmetalfiberincreasesabout14.2%～17.8%andthecompressivestrengthincreasesabout7.3%～23.1%.Conductivecopperplatingmetalfibercanimprovetheshieldingeffectivenessofmortar,theoptimalfibervolumefractionoffiberincorporationmethodis1%,SEofthemortarusingthefiberreinforcedpolymermortaradoptfull-pavemethodishigherthanthatoffibermortarineachfrequencyrange,andtheincreasingextentisabout20dBintherangeof200～1500MHz,thelargestSEis-51.52dB.Theseresultshaveacertainguidingsignificancetothepromotionofelectromagneticshieldingmortarincivilbuilding.

碳纳米管增强水泥砂浆的力学性能研究

李云峰，孙静，韩米雪

２０15年第6期

摘要

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摘要：将不同比例的碳纳米管掺入水泥砂浆，制备了六组水泥砂浆复合材料试件，分析了不同龄期下不同掺量的碳纳米管分散液对水泥砂浆力学性能的影响。研究结果表明：少量碳纳米管的掺入，会使水泥砂浆的力学性能提高，但是掺量过高时反而会有所下降。碳纳米管对水泥砂浆早期的力学性能提高较大,当水灰比为0.50时，碳纳米管的掺加量存在一个最优值。 Abstract: In order to analyze the flexural strength and the compressive strength of the cement mortar under different content of carbon nanotubes in different ages, six groups of cement mortar mixed with different proportions of carbon nanotubes are tested. The experimental results show that the incorporation of a small amount of carbon nanotubes improves the mechanical properties of cement mortar, but the mechanical properties of cement mortar decline when the dosage is too high. The early mechanical properties of cement mortar with carbon nanotubes are greatly improved. The mixing amount of carbon nanotubes is an optimal value while the water-cement ratio is 0.50.

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