苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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房建材料及制品

硅灰对石膏基自流平砂浆性能的影响研究
硅灰对石膏基自流平砂浆性能的影响研究
  • 李静静
2020年第5期
摘要
引用本文
摘  要:研究了硅灰对石膏基自流平砂浆物理力学性能、耐水性的影响。结果表明,掺加适量的硅灰可以改善石膏基自流平砂浆的流动性、缩短凝结时间、提高强度,且收缩率基本无变化;石膏基自流平砂浆的吸水率和软化系数有所提高,耐水性得到改善。 Abstract: The influence of silica fume on the physical and mechanical properties, water resistance of the gypsum-based self-leveling mortar were studied. The results show that by adding appropriate amount of silica fume, the fluidity and strength of gypsum based self-leveling mortar can be improved, and the setting time can be reduced, and the shrinkage is almost no changing. Water resistance can be improved by ameliorating water absorption and softening coefficient.
李静静.硅灰对石膏基自流平砂浆性能的影响研究[J].混凝土与水泥制品,2020(5):80-82. LI J J.Influence of Silica Fume on Properties of Gypsum-based Self-leveling Mortar[J].China Concrete and Cement Products,2020(5):80-82.
钢筋桁架混凝土双向叠合板的力学性能分析
钢筋桁架混凝土双向叠合板的力学性能分析
  • 张 弛,朱杰江
2020年第5期
摘要
引用本文
摘 要:利用有限元软件ABAQUS,分别建立了两种拼接方法(平行拼接和十字拼接)下的双向叠合板计算模型,并与现浇板计算模型进行了对比,分析了叠合板承载力和刚度的差异,并探讨了叠合板的损伤分布及桁架腹筋对叠合板承载力的影响。结果表明,线弹性阶段,双向叠合板的后浇带可增强结构的整体性;塑性阶段,双向叠合板后浇带属于受力薄弱环节,出现明显的应力集中和损伤分布;增大桁架腹筋的直径和排数对提高叠合板的承载力有显著影响。Abstract:UsingthefiniteelementsoftwareABAQUS,thecalculationmodelsoftwo-waycompositeslabswhichhavetwokindsofsplicingmethods(parallelsplicingjointandcrosssplicingjoint)wereestablishedrespectively,andcomparedwiththepouredconcreteslabscalculationmodel,andthedifferenceofbearingcapacityandstiffnesswasanalyzed,andthedamagedistributionofcompositeslabsandtheinfluenceoftrusswebbarsonbearingcapacitywerediscussed.Theresultsshowthatduringtheelasticperiod,thepost-pouringbeltofthetwo-waycompositeslabscanenhancetheintegrityofthestructure.Intheplasticperiod,thepost-pouringbeltistheweakpartofslabs.Increasingthediameterandthenumberoftrusswebbarshasasignificanteffectonimprovingthebearingcapacityofcompositeslabs.
张弛,朱杰江.钢筋桁架混凝土双向叠合板的力学性能分析[J].混凝土与水泥制品,2020(5):75-79. ZHANG C,ZHU J J.Mechanical Behavior Analysis of Reinforced Truss Concrete Two-way Composite Slabs[J].China Concrete and Cement Products,2020(5):75-79.
抹灰砂浆与加气混凝土墙体的黏结性能提升技术研究
抹灰砂浆与加气混凝土墙体的黏结性能提升技术研究
  • 庄梓豪,黄启林,王 莹,马再兴
2020年第5期 NO.289 P71-74
摘要
引用本文
摘 要:采用拉伸黏结强度测试方法对砂浆和加气混凝土墙面的黏结性能进行了研究,重点探讨了普通抹灰砂浆和薄抹灰砂浆用基本原材料对砂浆不同龄期黏结强度的影响。结果表明,随着养护时间的延长,砂浆的黏结强度提高;在加气混凝土抹灰之前涂刷一层界面剂,能够有效地减少空鼓和开裂,提高砂浆的黏结强度;薄抹灰砂浆较普通抹灰砂浆具有更好的黏结性能和抗流挂性能,能够减少砂浆的空鼓和开裂现象。Abstract:Thetensilebondstrengthtestmethodwasusedtostudythebondingperformanceofmortarandaeratedconcretewall,andtheeffectsofbasicrawmaterialsforordinaryplastermortarandthinplastermortaronthebondstrengthofmortaratdifferentageswerediscussed.Theresultsshowthatwiththeextensionofcuringtime,thebondingperformanceofmortarincreases.Applyingalayerofinterfaceagentontheaeratedconcreteplastercaneffectivelyreducehollowingandcracking,andimprovethebondingperformanceofmortar.Thinplastermortarhasbetterbondingperformanceandantisaggingperformancethanordinaryplastermortar,andcanreducehollowingandcrackingofmortar.
庄梓豪,黄启林,王莹,等.抹灰砂浆与加气混凝土墙体的黏结性能提升技术研究[J].混凝土与水泥制品,2020(5):71-74. ZHUANG Z H,HUANG Q L,WANG Y,et al.Research on the Improvement Technology of Bonding Performance of Plaster Mortar and Aerated Concrete Wall[J].China Concrete and Cement Products,2020(5):71-74.
某超长高层框剪结构温度效应设计与裂缝案例分析
某超长高层框剪结构温度效应设计与裂缝案例分析
  • 罗慧瑜,金雪峰
2020年第5期
摘要
引用本文
摘 要:以合肥某超长高层框架-剪力墙结构为背景,介绍了温度作用与收缩效应设计及采取的加强措施,研究了结构在温度作用及收缩效应下的变形规律与应力分布特征。结果表明,底部2层收缩变形及楼板应力均较大,3层以上相对收缩变形及楼板应力均很小,可忽略不计。同时对该超长高层结构12~16层仍局部产生了集中裂缝的成因进行了深入剖析,并提出了应对方法和处理措施,可为类似工程实践提供参考。Abstract:Asuperlonghigh-riseframe-shearwallstructureinHefeiwastakenasanexample,andthedesignoftemperatureaction,shrinkageeffectandstrengtheningmeasureswereintroduced,andthedeformationlawandstressdistributioncharacteristicsofthestructureunderthetemperatureactionandshrinkageeffectwerestudied.Theresultsshowthattheshrinkagedeformationandfloorstressofthebottomtwofloorsarelarge,andtherelativeshrinkagedeformationandfloorstressabovethethirdflooraresmallandcanbeignored.Atthesametime,thecausesoflocalconcentratedcracksinthe12~16 floorsofthesuperlonghigh-risestructureareanalyzed,andthecorrespondingmethodsandtreatmentmeasuresareputforward,whichcanprovideareferenceforsimilarengineeringpractice.
罗慧瑜,金雪峰.某超长高层框剪结构温度效应设计与裂缝案例分析[J].混凝土与水泥制品,2020(5):66-70 LUO H Y,JIN X F,et al.Temperature Effect Design and Crack Case Analysis of A Super Long High-rise Frame Shear Wall Structure[J].China Concrete and Cement Products,2020(5):66-70.
超低能耗保温夹芯墙板金属夹形拉结件受力性能分析
超低能耗保温夹芯墙板金属夹形拉结件受力性能分析
  • 吕安安1,张绍武1,赵志刚2,周 剑3
2020年第5期
摘要
引用本文
摘 要:为了探讨超低能耗夹芯保温外墙拉结件受力性能,分别从抗拉性能、抗剪性能、拉剪性能和对应的变形性能进行了试验研究,验证了数值模拟分析的可行性,并根据试验和模拟结果给出了拉结件的安全系数。结果表明,夹形拉结件的抗拉性能、拉剪性能的抗拉性能可以满足国内标准的可靠性要求;但抗剪性能难以满足国内标准要求;拉结件在试验中达到设计承载力时变形量均小于胶缝变形能力2.54mm,不影响接缝性能。Abstract:Inordertodiscussthemechanicalpropertiesoftheconnectorsofthesandwichinsulationwallwithultra-lowenergyconsumption,thetensileproperties,shearproperties,tensileshearpropertiesandcorrespondingdeformationpropertieswerestudied,andthefeasibilityofnumericalsimulationanalysiswasverified,andthesafetyfactorofthemetalconnectorswasgivenaccordingtothetestandsimulationresults.Theresultsshowthatthetensilepropertiesandtensileshearpropertiesoftheconnectorscanmeetthereliabilityrequirementsofdomesticstandards,however,theshearperformanceisdifficulttomeetrequirementsofthedomesticstandards.Whentheconnectorsreachthedesignbearingcapacityinthetest,thedeformationamountislessthan2.54mmoftheplasticjointdeformationcapacity,whichdoesnotaffectthejointperformance.
吕安安,张绍武,赵志刚,等.超低能耗保温夹芯墙板金属夹形拉结件受力性能分[J].混凝土与水泥制品,2020(5):61-65,91. LYU A A,ZHANG S W,ZHAO Z G,et al.Analysis on Mechanical Performance of Metal Clamp Connectors on Precast Concrete Sandwich Wall with Ultra-low Energy Consumption[J].China Concrete and Cement Products,2020(5):61-65,91.
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