土木工程专业外文文献及翻译样本VIP

1、资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。英文原文 :Building construction concrete crack ofprevention and processingAbstractThe crackproblemof concreteisa widespreadexistencebut again difficult in solve of engineering actual problem,this textcarriedon a studyanalysis to a littlebitfamiliarcrack problem in the conc

2、reteengineering,andaimatconcretethecircumstanceputforwardsomeprevention,processing measure.Keyword: Concrete crack prevention processingForewordConcretesis1 kind isanticipateby thefreestone bone,cement,water andother mixture but formation ofthe inadditionmaterialofqualitybrittlenessnotand allmateria

3、l.Because the concrete construction transform with oneself,control etc. a seriesproblem,harden model of inthe concreteexistencenumerous tinyhole,spiritcaveand tinycrack,isexactly because these beginning start blemish of existencejust make the concrete present one some not and all thecharacteristicof

4、quality.Thetinycrackisakindofharmless crack and accept concrete heavy, defend Shen and a资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。littlebitother use functionnota creationtoendanger.Butafter the concrete be subjected to lotus carry, differencein temperatureetc.function,tiny crackwouldcontinuouslyofexpand withco

5、nnect,end formationwe can see withouttheaidofinstrumentsofmacro viewthecrackbe alsothecrackthat the concrete often say in the engineering.Concrete building and Gou piece usually all take sewerto make of, because of crack of existence and developmentusually make inner part of reinforcing bar etc. mat

6、erialcreationdecay,lowerreinforcedconcretematerialofloading ability, durable and anti- Shen ability, influencebuildingof externalappearance,servicelife,severitywillthreatarrivepeopleslifeand propertysafety.A lot ofallofcrashofengineeringsisbecauseoftheunsteadydevelopment of the crack with the result

7、 that. Modern agescienceresearchwithagreatdeal ofoftheconcreteengineeringpracticecertificate,intheconcreteengineeringcrack problemisineluctable,alsoacceptableincertainly of the scope just need to adopt valid of measurewill it endanger degree control at certain of scope inside.The reinforcedconcreten

8、orm is alsoexplicitprovision:Somestructureat placeofdissimilarityunderthe conditionallow资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。existencecertainthecrackofwidth.Butatunderconstructionshouldas faras possibleadopt a validmeasurecontrolcrackcreation,make the structuredont appear crackpossibly or as far as possib

9、le decrease crack of amount andwidth,particularlywant to as faras possibleavoidharmfulcrack of emergence, insure engineering quality thus.Concrete crack creation of the reason be a lot of andhavealreadytransformedtocauseofcrack:Suchastemperaturevariety,constringency,inflation,theasymmetry sink tosin

10、k etc. reason causeof crack; Haveoutside carry the crack that the function cause; Protectedenvironmentnotappropriatethecracketc.caused withchemicaleffect.Want differentiationto treatintheactualengineering,workoutaproblemaccordingtotheactualcircumstance.In the concrete engineering the familiar crack

11、and theprevention1.Stem Suo crack and preventionStem the Suo crackmuch appear afterthe concreteprotectbe overofa periodof time or concretesprinkle to build tocompletebehindof around a week. Inthecement syrup humidityof evaporatewouldcreationstemSuo,andthiskindof资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。constri

12、ngencyiscantnegative.StemSuocrackofthecreationbemainisbecauseofconcreteinsideoutsidehumidityevaporatedegreedissimilaritybutcausetotransformdissimilarityofresult:The concreteissubjectedto exterior condition of influence, surface humidity losslead quick, transform bigger, inner part degree of humidity

13、variety smaller transform smaller, bigger surface stem theSuo transformto be subjected toconcreteinnerpartcontrol,creation more big pull should dint but creation crack. Therelativehumidityis more low,cement syrup body stem Suo morebig, stem the Suo crack be more easy creation. Stem the Suocrackismuc

14、h surfaceparallellinesformorthenetshallowthincrack,widthmany between 0.05-0.2 mm, theflatsurfacepartmuch see in the bigphysicalvolume concrete and followit more in thinner beam plank short to distribute. Stem Suocrackusuallytheanti-Shen ofinfluenceconcrete,cause thedurable oftherusteclipseinfluencec

15、oncreteofreinforcingbar, under the function of the water pressure dint wouldcreation the water power split crack influence concrete of loading dint etc.Concrete stem the Suo be main with water ash of the concrete ratio, the dosage of the composition, cement of cement, gather to anticipate of the dos

16、age of the资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。property and dosage, in addition etc. relevant.Main prevention measure: While being to choose to usethe constringency quantity smaller cement, general low hotwatermireand powder ash fromstovecement in theadoption,lowerthedosage of cement. Two isa concreteof s

17、tem the Suobe subjectedtowaterash ratioofinfluencemore big,waterash ratiomore big,stem Suo more big,so intheconcretematchthe ratio the design should as far as possible control goodwaterash ratioofchoose to use,theChan add in themeantimeaccommodationofreduce water.Threeisstrictcontrolconcrete mix ble

18、nd with under construction of match ratio,use of concrete water quantity absolute cant big in matchratio design give settle of use water quantity. Four is theearlier period which strengthen concrete to protect, andappropriateextensionprotectofconcretetime.Winterconstructionwantto be appropriateexten

19、sion concreteheatpreservationtooverlaytime,and Tu2 Shua protecttoprotect.Five is a constitution the accommodation is in the concretestructure of the constringency sew.2.The Su constringency crack and preventionSu constringency is the concrete is before condense,surfacebecauseoflosewaterquickerbutcre

20、ationof资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。constringency. The Su constringency crack is general at dryheatorstrongwindthe weatherappear,cracksmuchpresentinginthecenterbreadth,bothends be inthecenterthinand the lengthbe different,witheach othernot coherentappearance. Shorter crack general long 20-30 cm, t

21、he longercrack can reach to a 2-3 m, breadth 1-5 mm. It creation ofmain reason is: The concrete is eventually almost having nostrength or strength before the Ning very small, perhapsconcrete just eventually Ning but strength very hour, besubjected to heat or compare strong wind dint of influence,the

22、 concrete surface lose water to lead quick, result in inthecapillarycreationbiggernegativepressbutmake aconcretephysicalvolume sharplyconstringency,but atthistimethestrengthofconcreteagaincantresistitsconstringency,thereforecreationcracked.The influenceconcrete Su constringency open the main factor

23、of crack tohave water ash ratio,concreteofcondense time,environmenttemperature, wind velocity, relative humidity.etc.Main prevention measure: One is choose to use stem theSuo valuesmallerhigherHuo soursaltoftheearlierperiodstrengthor commontheHuo sourbrinemire.Two isstrictthecontrol water ash ratio,

24、 the Chan add to efficiently reduce资料内容仅供您学习参考，如有不当或者侵权，请联系改正或者删除。watertoincrementthecollapseofconcretefalla degreeandwith easy, decrease cement and water of dosage. Three is tosprinkle before building concrete, water basic level andtemplateeven to soak through.Fouris in time to overlaytheperhaps damp grass mat of the plasticsthinfilm,hemp sliceetc., keep concrete eventually before the Ning surface ismoist, pe