第七期_2016_《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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第七期

氟化工工业废渣在灌浆材料中的应用研究

王春明，邓建良

２０16年第7期

摘要

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摘要：以氟化工工业废渣为主要原材料，经活性激发，添加适宜减水剂、可再分散乳胶粉制备石膏基灌浆材料。研究了复合激发剂对氟化工工业废渣凝结时间、强度的影响，聚羧酸减水剂与氟化工工业废渣的相容性以及可再分散乳胶粉对石膏基灌浆材料黏结强度和耐水性能的影响，探讨了利用氟化工工业废渣制作石膏基灌浆材料的可能性。 Abstract: Using fluorine chemical industrial residue as a main materials, gypsum-based grouting material was prepared by activating activity, adding superplasticizer, and redispersible emulsion powder. The influence of composite activator on setting time and strength was studied, compatibility of polycarboxylate superplasticizer and fluorine chemical industrial residue, and effects of redispersible emulsion powder on bonding strength and water resistance of gypsum-based grouting material were carried out. The possibility of gypsum-based grouting material by using fluorine chemical industrial residue is discussed.

热处理电镀污泥掺杂对混凝土力学性能及浸出毒性的影响

韩香云，任洲，殷春涛，王亚强，陈天明

２０16年第7期

摘要

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摘要：采用热处理-水泥固化/稳定化技术对电镀污泥中的重金属进行稳定化、固定化处置，研究了掺杂混凝土的力学性能与浸出毒性。结果表明，热处理对电镀污泥减量化效益明显，残渣中铜、镍有富集作用，但其形态从可交换态向残渣态过渡较为明显（分别达到82.46%和96.58%），生物安全性得到明显提高。再将电镀污泥掺入混凝土，按照不同比例将水泥与电镀污泥混掺制砖，其中以80:20配比水泥块力学性能最好，浸出毒性达到国标限值要求。 Abstract: Stabilization and immobilization of heavy metals from electroplating sludge dealt with heat treatment, cement solidification/stability technology, mechanical properties and leaching toxicity are studied by mixing concrete. The results show that, reduction effects of heat treatment on electroplating sludge is remarkably achieved, enrichment of reside from copper and nickel is carried out, transition of its form is obvious from exchangeable to residual (which can reach 82.46% and 96.58% respectively), bio-safety can be improved obviously. Mixed electroplating sludge and concrete, brick is prepared by cement and electroplating sludge according to different ratio, that mechanical properties is the best by 80:20 proportion, leaching toxicity can meet national standard.

PVA纤维尾矿砂水泥基复合材料耐久性试验研究

张少峰1，王雪1，鲍文博2，委玉奇1

２０16年第7期

摘要

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摘要：通过冻融、抗渗和腐蚀试验进行了环保型PVA纤维尾矿砂水泥基复合材料的试验研究。试验表明：材料抗冻融性能好，经65d250次-20～+20℃的冻融循环后，试件的整体性好，质量和弹性模量损失分别为15.4%和14.6%，可适用寒冷地区的工程需要；材料的抗渗性能较好，密实度高，渗透系数为1.749×10-4m/h；具备优异的抗腐蚀能力，经6个月5%不同种类的盐溶液浸泡腐蚀后进行四点抗压和抗弯试验，各性能指标降低率为6%～10%。Abstract:Throughfreeze-thawtest,anti-permeabilitytest,andcorrosiontest,experimentof environmentalPVAtailingcement-basedcompositematerialsisstudied.Theresultsshowthat,freeze-thawresistanceofmaterialisgood,integrityofspecimenisalsogoodundertemperaturebetween-20℃to+20℃after250times65days,thelossofqualityandelasticmodulusisrespectively15.4%and14.6%,whichisappliedforengineeringincoldarea,permeabilityofmaterialsisgood,compactnessishigh,permeabilitycoefficientis1.749×10-4m/h,corrosionisgood,throughimmersionandcorrosion,four-pointcompressivestrengthtestandbendingexperimentofdifferenttypesof5%saltsolutioniscarriedoutaftersixmonth,propertiesindexisreducedby6%and10%.

水坂景观大桥微膨胀自密实钢管混凝土应用技术研究

刘向楠，孟书灵，李晓文，康明

２０16年第7期

摘要

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摘要：乌鲁木齐水坂景观大桥工程是十三届冬运会场的配套设施，为新疆地区首例大跨度中承式飞燕拱桥。桥拱钢管混凝土结构采用C50微膨胀、自密实混凝土，具有良好的工作性能、微膨胀性能和力学性能：钢管混凝土自由膨胀率稳定收敛期为52d，自由膨胀率为5.0×10-4；3d强度达到设计强度90.6%，7d即达到设计强度。混凝土浇注采用顶升法施工工艺，灌注施工过程中根据泵送压力情况调整泵送作业方案，并在泵送作业前后及泵送作业过程中进行了全过程测量控制并采取了适当的纠偏措施。 Abstract: Urumqi ShuiBan Landscape Bridge is supporting facilities of 12 Olympic winter games , which was the first large span half-through flying-swallow-type arch bridge in Xinjiang region. C50 micro expansion self-compacting concrete was used in arch concrete-filled steel tube structure,that had good work performance, micro expansion performance and mechanical properties, the stable convergence period of free expansion for steel concrete was 52 days and the free expansion rate was 5.0×10-4; 3d strength met design strength by 90.6%, 7d strength met design strength. The technology of concrete pouring was used by jack-up method which should be adjusted by pumping pressure situation pumping operation scheme. At the same time, whole process measurement control is carried out before or after pumping operations, and in pumping process, appropriate corrective measures should be taken.

Y型巨柱斜撑高位转换结构顶升泵送混凝土施工技术

李树文，余红福，龙叶天，蔡继斌，刘雨

２０16年第7期

摘要

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摘要： Y型巨柱斜撑高位转换结构是一种较为复杂的钢管混凝土结构体系，基于此类结构内部带有多层加劲肋板的封闭钢管混凝土结构具有操作空间狭小，浇筑工艺困难、内部空气难以排除、混凝土成型质量不易控制的特点。本文结合西宁某工程实践，提出了一种Y型巨柱斜撑高位转换体系中高位封闭斜撑钢管自密实混凝土的泵送顶升施工技术。 Abstract: Y type giant rider shore high-level transfer structure is a complex concrete-filled steel tube structure system. Based on characteristic that of closed concrete-filled steel tube structure with multilayer stiffening rib plate in inner of this type of structure has limited operation space and it is difficult to pour concrete, exhaust air and control the molding quality of concrete. Combined with a Xining engineering practice, pumping jack-up construction technique of high-level closed rider shore in concrete-filled steel tube and self-compacting concrete in Y type giant rider shore high-level transfer system is put forward.

人防地下室顶板结构设计多方案比选分析

刘付华1，覃银辉2，朱腾宇1，刘琳1

２０16年第7期

摘要

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摘要：依托实际工程项目，对人防地下室顶板比较全面地制定了方案一~方案八共计八个方案，绘制详细施工图并进行详细工程量和经济指标的计算；从地下室净高、经济指标、施工情况等多方面综合分析各个方案的优缺点，为在实际项目应用时选择最优的人防地下室顶板方案提供参考。 Abstract: Eight schemes named 1~8 was formulated of basement tip ban of air defence according to actual engineering project, the detailed working was drown up, the detailed engineering quantity and economic indicator were also calculated. In order to provide reference to choose air defence basement roof of actual engineering project, the relative merits of every scheme were analyzed according to the basement net height, economic indicator and construction situation.

外墙无机保温砂浆的制备技术研究

戚剑1，蔡青青1，何庆迪1，刘银2

２０16年第7期

摘要

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摘要：通过不同类别的保温骨料、不同的胶凝材料、不同类别的填料及外加剂分别制备保温砂浆，对产品的综合性能进行了考察，得到保温效果及施工性、黏结性能、强度均佳的无机保温砂浆。 Abstract: Insulation mortar was prepared by different types of insulation aggregates, cementitious materials, fillers and admixtures, comprehensive performances of insulation mortar were carried out, which can obtain inorganic insulation mortar with good insulation effects, workability, adhesive properties and strength.

掺硝酸钙外加剂对湿拌砂浆抗冻性能影响的试验研究

孟刚，赵世冉，张凯峰，刘博博，刘磊，李文龙，刘彦辉

２０16年第7期

摘要

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摘要：湿拌砂浆在北方地区推广应用过程中，将会受到冬季低温环境的影响。本文通过试验，对比研究了掺硝酸钙外加剂对湿拌砂浆抗冻性能的影响，试验表明，在-4～5℃温度变化范围内，使用含硝酸钙外加剂可以降低湿拌砂浆的稠度损失，改善砂浆的抗冻性能，更有利于砂浆工程施工；硝酸钙外加剂可以提高低强度等级湿拌砂浆的抗冻性能，但对于M15及以上较高强度等级湿拌砂浆的抗冻性能改善作用不明显。Abstract:Whenthewetmixedmortarisappliedinthenorthernarea,itwillbeaffectedbylowtemperatureenvironmentinwinter.Theinfluenceofcalciumnitrateadditivesonfrostresistance propertiesofwetmixmortarisstudiedbycomparisontest.Theresultshowsthat,atatemperature-4～5℃range,admixturescontainingcalciumnitratecanreducelossofconsistencyofwet-mixedmortar,improvefrostresistanceofmortar,andthatismorebeneficaltomortarprojectconstruction.Calciumadditivescanimprovefrostresistanceoflowgradewetmixedmortar.However,itisnotobvioustoimprovefrostresistanceofM15andthehighgradewetmixedmortar.

新型脱硫灰基稻壳保温砂浆的制备及性能研究

黄德祥1，王朝强2，刘东升3

２０16年第7期

摘要

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摘要：以固废物脱硫灰替代部分水泥，辅以轻质骨料稻壳，制备出了水泥-脱硫灰-稻壳保温干混砂浆，研究了脱硫灰掺量、稻壳掺量等对砂浆性能的影响，并对胶凝材料体系最佳配比进行了试验优选。研究结果表明，水灰比为0.51、脱硫灰替代10%水泥、外掺9.7%的稻壳替代河砂、胶砂比为1:0.97的稻壳保温砂浆导热系数低，表观密度为1623kg/m3，28d抗压强度为11.5MPa,，且砂浆保水率为92.6%，2h稠度损失率为13.9%，凝结时间为7.3h，各项性能均满足GB/T25181—2010《预拌砂浆》标准要求。Abstract:Cement-desulfurizationash-basedrice-hullthermalinsulationdrymortarmixedlight-weightaggregatesrice-hullwaspreparedwithsolidwastedesulfurizationashreplacingsomecement.Theinfluencesofamountofdesulfurizationashandrice-hullonperformanceofmortarwereinvestigated,andthebestmixproportionofcementitioussystemwasselected.Theresultsshowthat,watertocementratiois0.51,desulfurizationashisreplacedby10%cement,rice-hullisreplacedby9.7%sand,binder-sandratiois1:0.97,thermalconductivityofcoeffirice-hullinsulationmortarislow,apparentdensityis1623kg/m3,compressivestrengthof28dupto11.5MPa,water-retentionrateis92.6%,consistencylossrateof2hupto13.9%,settingtimeis7.3h,whichcansatisfystandardrequirementsofGB/T25181—2010ready-mixedmortar.

植物纤维增强生土基复合材料的性能研究

刘志华1，马军涛2，张磊1，杨久俊1

２０16年第7期

摘要

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摘要：以化学改性的生土基材料为基础，研究了不同植物纤维物理改性对生土材料制品力学性能和耐久性能的影响，并从结构上分析了其强度增减原因。研究结果表明，复合物理改性能提高改性效果。 Abstract: Took raw soil based material by chemical modified as foundation, the influence of physical modification for different plant fiber on mechanical properties and durability of raw soil wall material is studied, reasons for increasing or decreasing in strength are analyzed. The results show that, modified effect can be improved by composite physical modification.

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