墙体局部鼓涨裂缝的主要矛盾Word格式.docx
- 文档编号:17857380
- 上传时间:2022-12-11
- 格式:DOCX
- 页数:3
- 大小:18.46KB
墙体局部鼓涨裂缝的主要矛盾Word格式.docx
《墙体局部鼓涨裂缝的主要矛盾Word格式.docx》由会员分享,可在线阅读,更多相关《墙体局部鼓涨裂缝的主要矛盾Word格式.docx(3页珍藏版)》请在冰豆网上搜索。
Atpresentforbuildingenergyefficiencymarketaccess,qualitycontrol,acceptanceofworkandtherewardsandpunishmentisstilllackofeffectivesupervisionmechanismandmeasuresexacerbatetheemergenceofthephenomenon.Thereforerealizeenergyconservationprojectqualitycommonfaultcausesanditsharmfulness,andputsforwardmeasuresfocusonthepreventionandcontrolofthermalinsulationengineeringqualitycommonfaultisveryimportant.
墙体保温层裂缝及防治:
Wallinsulationlayercracksandthepreventionandtreatment:
墙体的裂缝可分为内保温墙体裂缝和外保温墙体裂缝:
内保温墙体出现裂缝是普遍现象。
在2003年调查的17栋楼中,除2栋近2年施工的粉刷石膏墙体未见裂缝外,都有程度不同的裂缝。
因为内保温墙体的裂缝时刻暴露在住户的视野之内,所以投诉相对较多。
内保温墙体的裂缝主要发生在板缝、窗口周围、窗角、保温板与非保温墙体的结合部。
Wallcrackscanbedividedintotheexternalthermalinsulationwallinsulationwallcracksandcrack:
insulationwallcracksisacommonphenomenon.Inthe2003surveyof17buildings,inluding2stuccogypsuminconstructionofnearlytwoyearsnotseencracks,havedifferentdegreesofcracks.Becausetheinsulationwallcracksalwaysexposedtothesightofthehousehold,somorecomplaints.Insulationwallcracksoccurmainlyintheplateseam,aroundthewindow,thewindowAngle,insulationboardandinsulationwallbodyjunction.
外保温墙体的裂缝主要发生在板缝、窗口周围、窗角、女儿墙部分、保温板与非保温墙体的结合部。
从裂缝的形状又可分为表面网状裂缝,较长的纵向、横向或斜向裂缝,局部鼓涨裂缝等。
Externalthermalinsulationwallcracksoccurmainlyintheplateseam,aroundthewindow,thewindowAngle,parapet,insulationboardandinsulationwallbodyjunction.Canbedividedintothesurfacereticularcrackfromthecrackshape,longvertical,horizontalordiagonalcracks,blowuplocalcracks,etc.
常见保温墙面开裂的直接现象及原因有:
Commoninsulationwallcrackphenomenondirectlyandthereasonsare:
直接采用水泥砂浆做抗裂防护层:
强度高、收缩大、柔韧变形性不够,引起砂浆层开裂;
DirectlyUSESthecrackresistanceofcementmortarprotectivelayer:
highstrength,largeshrinkage,flexibledeformationisnotenough,causecrackingmortarlayer;
抗裂防护层的透汽性不足,如挤塑聚苯板在混凝土表面的应用;
配制的抗裂砂浆虽然也用了聚合物进行改性,但柔韧性不够或抗裂砂浆层过厚:
胶粘剂里有机物质成分含量过高,矿用塑料网胶浆的抗老化能力降低。
低温导致粘结剂中的高分子乳液固化后的网状膜状结构发生脆断,失去其本身所具有的柔性作用;
砂的粒径过细,含泥量过高,砂子的颗粒级配不合理;
苯板密度太低,尺寸稳定性不合格;
苯板没有完成墙体保温工程前对其陈化的要求,上墙后产生较大的后收缩;
苯板粘贴时局部出现通缝或在窗口四角没有套割。
Insufficientanti-crackingprotectivelayerofwatervaporpermeability,suchasextrudedpolystyreneboardapplicationinconcretesurface;
Preparationofanti-crackingmortarhasinthepolymermodification,butflexibleenoughoranti-crackmortarlayertoothick:
adhesiveinthecompositionoforganicmattercontentisexorbitant,mucilageanti-agingabilitydecrease.Ofadhesiveoflowtemperaturecuringpolymeremulsionreticularmembranestructurebrittlefractureoccurs,afterlosingitsitselfhaveflexibleeffects;
Refinedclassificationofsandparticlesize,highsiltcontent,sandgrainsizedistributionisnotreasonable;
Unqualifiedbenzeneboarddensityistoolow,thesizestability;
Benzeneboarddidn'
tfinishthewallthermalinsulationengineeringbeforethedemandforitsChen,onthewallafterproducelargershrinkage;
Benzeneplatepastewhenlocalseamappearsonorinthewindowcornerswithoutcutting.
使用了不合格的玻纤网格布如:
抗裂强力低、耐碱强力保留率低、断裂应变大等;
玻璃纤维网格布(或镀锌钢丝网)的平方米克重过低、延伸率过大、网孔尺寸过大或过小、网格布的耐碱涂敷层的涂敷量不足或钢丝网的镀锌层厚度不足,钢丝锈蚀膨胀。
面层中网格布的埋设位置不当,膨润土防水毯过于靠近内侧;
因网格布间断开无搭接或搭接尺寸不能满足规范的要求;
窗口周边及墙体转折处等易酿酒设备产生应力集中的部位未设增强网格布;
抹底层胶浆时直接把网格布铺设于墙面上,胶浆与网格布不能很好的复合为一体,使得网格布起不到应有的约束和分散作用。
保温板板面不平,特别是相邻板面不平。
板间缝隙用胶粘剂填塞;
Usedtheunqualifiedglassfibergridclothsuchascrackresistance,lowstrength,lowalkaliresistantstrengthretentionrate,fracturestrainandsoon;
Glassfibergridclothorgalvanizedsteelwiremeshsquaremetregramweightistoolow,theelongationistoolarge,themeshsizeistoobigortoosmall,alkaligridclothcoatinglayerofthecoatingamountofinadequateorinsufficientthicknessofgalvanizedwiremesh,wirecorrosionexpansion.Surfacegridcloth,inappropriatepositionofburiedintooclosetotheinside;
Becauseofthecontinuousopenwithoutoverlappinggridclothorlapjointsizedoesn'
tmeettherequirementofthespecification;
Windowandwallturnwitheasytoproducestressconcentrationaroundthesitedidnotsettheenhancedgridcloth;
Wipethebottomrubberpastewhenthegridclothlaidonmetope,directlytothemucilageandgridclothcannotverygoodcompositeasawhole,makesthegridclothdon'
tconstraintsanddispersioneffect.Insulationboardsurfaceuneven,especiallyintheadjacentpanel.Plategapbetweenadhesiveforstuffing;
采用刚性腻子,腻子柔韧性不够;
采用不耐水的腻子,当受到水的浸渍后起泡开裂;
采用漆膜坚硬的涂料,涂料断裂伸长率很小;
混凝土输送泵腻子与涂料不匹配。
例如,在聚合物改性腻子上面使用某些溶剂型涂料,由于该涂料中的溶剂同样会对腻子中的聚合物产生溶解作用而使腻子性能遭到破坏;
在材料柔性不足的情况下未设保温系统的变形缝;
在保温系统的截止部位因对不同材料材质变换处的防水处理方案不当;
施工面层时在太阳曝晒下进行或在高温天气下抹完面层后未及时喷水养护,导致面层失水过快;
冬季低温状态下施工,防冻措施不到位,因冻胀作用而产生的变形;
违反施工技术规程,未安窗框先作保温或者做完保温后单抹窗口。
在材料柔性不足的情况下未设保温系统的变形缝。
因系统的连续面过长累积变形过大而引起面层的开裂。
腻子除应具有耐水性、耐冻融性外还应具有柔性或可变形性;
外饰面做成平涂料,比较容易开裂。
Usingrigidputty,flexibleputty;
Useisnotwaterresistantputty,whenthewaterdippingblisteraftercracking;
Usingcoatinghardcoating,coatingelongationatbreakissmall;
Puttyandpaintdon'
tmatch.Forexample,usesomesolventcoatingsonpolymermodifiedputty,asthesolventinthecoatingwillalsobeboredwithchildofthepolymersolutionandimprovestheperformanceoftheputtyweredamaged;
Inthecaseofinsufficientmaterialflexibledeformationofthejointhaveathermalinsulationsystem;
Inaspartoftheinsulationsystemfordifferentmaterialtransformationofwaterproofmaterialhandlingsolution;
Whenconstructionsurfaceorunderthesunexposureunderthehightemperatureweatherafterwipethesurfacewaterfailedtotimelymaintenance,leadtosurfacewaterlosstoofast;
Winterlowtemperatureconditionconstruction,antifreezingmeasuresdoesnotreachthedesignatedposition,becauseofthefrostheaveeffectproducedbythedeformation;
Inviolationoftheconstructiontechnologyprocedures,beforeAnnwindowframeafterheatpreservationheatpreservationorsinglewindow.Inthecaseofinsufficientmaterialflexibledeformationcrackshaveathermalinsulationsystem.Becauseofsystemcontinuoussurfacelongaccumulateddeformationistoolargeandcausesurfacecracking.Beboredwithchildshouldhavewaterresistanceandfreeze-thawresistanceshouldalsohaveaflexibleordeformability;
Outsidefacingflatpaint,easytocrack.
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 墙体 局部 裂缝 主要矛盾