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回弹法检测混凝土抗压强度检测报告工程名称委托单位检测方法检测地点检测日期2011年3月6日哈尔滨工业大学交通实验中心2011年3月7日实验室混凝土梁强度推定工程回弹法检测混凝土抗压强度试验报告编号QL070020110306002共7页项目负责人主要检测人报告审核人报告签发人声明
1.本报告涂改、错页、换页、漏页无效;
2.检测单位名称与检测报告专用章名称不符者无效;
3.本报告无我单位相关技术资格证书章无效;
4.本报告无检测、审核、批准人签字无效;5.未经书面同意不得__或作为他用6.如对本检测报告有异议或需要说明之处,可在报告发出后15天内向本检测单位书面提出本单位将于5日内给予答复检测单位地址黑龙江省哈尔滨市南岗区黄河路73号____150090__传真0451-86282118____lizhonglong2004@
126.com目录一项目概况…………………………………………1二检测目的及依据…………………………………1三检测内容…………………………………………1四现场检测…………………………………………1五检测结果…………………………………………2六检测结论…………………………………………3七附图表……………………………………………4-项目概况介绍项目的一般情况,包括工程的名称,工程建设的地点,分别列出建设单位、设计单位、施工单位以及监理单位的名称结构或构件名称、施工图纸和混凝土设计强度等级;水泥的品种、强度等级和用量,砂石的品种、粒径,外加剂或掺合料的品种、掺量和混凝土配合比等;模板类型,混凝土浇筑、养护情况和成型日期;结构或构件检测原因的说明二检测目的及依据在正常情况下,混凝土强度的验收和评定应按现行有关国家标准执行当对结构中的混凝土有强度检测要求时,根据回弹法对混凝土强度进行检测,进行构件回弹值的测定,并推定结构混凝土的强度,估算混凝土的强度等级,作为混凝土结构处理的一个依据检测依据标准及代号《回弹法检测混凝土抗压强度技术规程》(JGJ/T23-2001)《混凝土结构工程施工质量验收规范》(GB50204-2002)《建筑结构检测技术标准》(GB/T50344-2004)《公路工程质量检验评定标准》(JTGF80-2004)三检测内容进行检测之前,首先应根据检测的目的及要求,按照规范规定的要求进行抽样,再在抽取的样本构件上均匀布置测区,且保证每个构件上测区数量不应少于10个回弹测试时,应始终保持回弹仪的轴线垂直于混凝土测试面宜首先选择混凝土浇筑方向的侧面进行水平方向测试如不具备浇筑方向侧面水平测试的条件可采用非水平状态测试或测试混凝土浇筑的顶面或底面四现场检测
1、检测原理混凝土表面受到回弹仪的弹击将产生塑性变形和弹性变形,将弹性变形能量(剩余能量)与弹击能量(初始能量)之比定义为回弹值,这就是回弹仪的基本工作原理
2、检测设备现场检测设备一览表设备型号编号检定日期HT225型回弹仪ZC-3A990526JD
2010.1108HT225型回弹仪五检测结果根据各测区回弹值,16个点去掉3个最大值和3个最小大值后求平均值,进行非标准状态的修正,查表取得对应测区的混凝土强度值最后按下列情况推定结构混凝土的强度
(1)按单个构件检测时,单个构件的混凝土强度推定值取该构件各测区中最小的混凝土强度计算值;
(2)按批抽样检测时,该批构件的混凝土强度推定按下式计算=m–
1.645S式中
(3)当同批测区混凝土强度换算值的标准差过大时,批构件的混凝土强度推定值可按下式计算式中——批中各构件中最小测区强度换算值的平均值MPa;——第j个构件中的最小测区混凝土强度换算值MPa;m——批中抽取的构件数
(4)按批抽样检测时,若全部测区强度的标准差出现下列情况时,则该批构件应全部按单个构件检测和推定强度
1、当混凝土强度等级低于或等于C20时S
4.5MPa
2、当混凝土强度等级高于C20时S
5.5MPa六检测结论经过对测得的混凝土强度数据的处理和转换,得到各构件混凝土的平均标号列下表根据标号由经验公式可推算出混凝土的实际弹性模量各构件混凝土的平均标号及弹性模量构件混凝土平均标号(MPa)弹性模量(MPa)
131.4由上表可知,各构件的混凝土标号达到了(未达到)构件设计标号*号设计要求七附图表混凝土强度回弹检测记录表工程名称共页第页构件名称及编号测区测点回弹实测值1363635343535373530303235363438342363635343236343536343735353537383363234363636363630373835343030304363636353435353434353032383834355383834383634353730353434353436346383436343535353532343635353430327383436353732323233353535363232318323534343738343635363536383437379343635363636363637343536353434381036303030353435363034363534343638混凝土浇注(顶面、底面、侧面)回弹仪与混凝土面夹角(90°、°)测区布置详细描述及备注测试人记录人测试日期注每个构件至少选10个测区;每个测区记取16个回弹值;相邻测区的间距控制在2m以内;测区__不易大于
0.04m2;在构件重要部位和薄弱部位必须布置测区,并应避开预埋件;混凝土表面应保持平整、清洁;测区应有清晰的编号和描述附图表混凝土强度回弹检测记录表工程名称共页第页构件名称及编号测区测点回弹实测值12345678910混凝土浇注(顶面、底面、侧面)回弹仪与混凝土面夹角(90°、°)测区布置详细描述及备注测试人记录人测试日期注每个构件至少选10个测区;每个测区记取16个回弹值;相邻测区的间距控制在2m以内;测区__不易大于
0.04m2;在构件重要部位和薄弱部位必须布置测区,并应避开预埋件;混凝土表面应保持平整、清洁;测区应有清晰的编号和描述Englishisthemostwidelyspokenlanguageinthehistoryofourplanetusedinsomewaybyatleastoneoutofeverysevenhu__nbeingsaroundtheglobe.HalfoftheworldsbooksarewritteninEnglishandthe__jorityofinternationaltelephonecallsare__deinEnglish.Englishisthelanguageofoversixtyper__ntoftheworldsradioprograms.Morethanseventyper__ntofinternational__iliswrittenandaddressedinEnglishandeightyper__ntofallcomputertextisstoredinEnglish.Englishhasacquiredthelargestvocabularyofalltheworldslanguagesperhapsas__nyastwomillionwordsandhasgeneratedoneofthenoblestbo___sofliteratureintheannalsofthehu__nitisnowtimetofa__thefactthatEnglishisacrazylanguage--themostlunaticandloopyandofalllanguages.InthecrazyEnglishlanguagetheblackbirdhenisbrownblackboardscanbegreenorblueandblackberriesaregreenandthenredbeforetheyareripe.Evenifblackberrieswerereallyblackandblueberriesreallybluewhatarestrawberriescranberrieshuckleberriesraspberriesandgooseberriessupposedtolookaddtothisinsanitythereisnobutterinbuttermilknoeggineggplantnograpeingrapefruitnobreadinshortbreadneitherwormsnorwoodinwormwoodneithermushnorroominmushroomneitherpinenorappleinpineappleneitherpeasnornutsinpeanutsandnohaminahamburger.Infactifsomebodyinventedasandwichconsistingofahampattyinabunwewouldh__eahardtimefindinganameforit.To__ke__ttersworseEnglishmuffinswerentinventedinEnglandfriesinFran__orDanishpastriesinDen__rk.Andwediscoverevenmoreculinary__dnessinthethatsweetmeatis__defromfruitwhilesweetbreadwhichisntsweetis__defromthisunreliableEnglishtonguegreyhoundsarentalwaysgreyorgray;pandabearsandkoalabearsarentbearstheyre__rsupials;awoodchuckisagroundhogwhichisnotahog;ahornedtoadisalizard;glowwormsarefirefliesbutfirefliesarenotfliestheyrebeetles;ladybugsandlightningbugsarealsobeetlesandtoasignificantproportionofladybugsmustbe__le;aguineapigisneitherapignorfromGuineaitsaSouthAmericanrodent;andatitmouseisneitherisliketheairwebreathe.Itsinvisibleinescapableindispensableandwetakeitforgranted.Butwhenwetakethetimetostepbackandlistentothesoundsthatescapefromtheholesinpeoplesfa__sandtoex-theparadoxesandvagariesofEnglishwefindthathotdogscanbecolddarkroomscanbelithomeworkcanbedoneinschoolnight__rescantakepla__inbroaddaylightwhilemorningsicknessanddaydreamingcantakepla__atnighttomboysaregirlsandmidwivescanbemenhours--especiallyhappyhoursandrushhours--oftenlastlongerthansixtyminutesquick-sandworksveryslowlyboxingringsaresquaresilverwareandglassescanbe__deofplasticandtableclothsofpapermostaredialedbybeingpunchedorpushedandmostbathroomsdonth__eanybathsinthem.Infactadogcangotothebathroomunderatree--nobathnoroom;itsstillgoingtothebathroom.Anddoesntitseemalittlebizarrethatwegotothebathroominordertogototheisitthatawo__ncan__nastationbutas__ncantwo__nonethata__ncanfatheramovementbutawo__ncantmotheroneandthatakingrulesakingdombutaqueendoesntruleaHowdidallthoseRenaissan__menreprodu__whentheredontseemtoh__ebeenanyRenaissan__writerissomeonewhowritesandastingerissomethingthatstings.Butfingersdontgro__rsdonthaberdashersdonthammersdonthamandhumdingersdontthepluraloftoothisteethshouldntthepluralofboothbeOnegoosetwogeese--soonemoosetwoOneindextwoindi__s--oneKleenextwoIfpeopleringabelltodayandrangabellyesterdaywhydontwesaythattheyaballIftheywrotealetterperhapstheyalsotheirtongue.IftheteachertaughtwhyisntitalsotruethatthepreacherWhyisitthatthesunshoneyesterdaywhileIshinedmyshoesthatItreadedwaterandthentrodonthebeachandthatIflewouttoseeaWorldSeriesgameinwhichmyf__oriteplayerfliedwecon__iveacon__ptionandre__iveatare__ptionwhydontwegrieveaandbelieveaIfahorsehair__tis__defromthehairofhorsesandacamelshairbrushfromthehairofcamelsfromwhatisamohaircoat__deIf_____scommit_____erydoinfantscommitinfantryIfoliveoilis__defromoliveswhatdothey__kebabyoilfromIfavegetarianeatsvegetableswhatdoesahu__nitarianeatAndImbeginningtoworryaboutthoseauthoritarians.Andifproandconareoppositesiscongresstheoppositeofyouh__etobelievethatallEnglishspeakersshouldbecommittedtoanasylumfortheverballyinsane.InwhatotherlanguagedopeopledriveinaparkwayandparkinadrivewayInwhatotherlanguagedopeoplereciteataplayandplayatarecitalInwhatotherlanguagedoprivateseatinthegeneralmessandgeneralseatintheprivatemessInwhatotherlanguagedopeopleshipbytruckandsendcargobyshipInwhatotherlanguagecanyournoserunandyourfeetcanaslimchan__andafatchan__bethesameandabadlickingandagoodlickingbethesamewhileawise__nandawiseguyareoppositesHowcansharpspeechandbluntspeechbethesameandquitealotandquiteafewthesamewhileoverlookandoverseeareoppositesHowcantheweatherbehotashellonedayandcoldashellthenextHowcantheexpressionsWhatsgoingonandWhatscomingoffmeanexactlythesamtonandunbuttonandtieanduntieareoppositeswhyareloosenandunloosenandr__elandunr__elhesameIfbadistheoppositeofgoodhardtheoppositeofsoftanduptheoppositeofdownwhyarebadlyandgoodlyhardlyandsoftyanduprightanddownrightnotopposingpairsIfharmlessactionsaretheoppositeofharmfulwhyareshamefulandshamelessbeh__iorthesameandpri__yo__ectslessexpensivethanpri__lessappropriateandinappropriatere__rksandpa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