2022年土木工程专业英语论文相关论文总结.docx

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1、Building construction concrete crack of prevention and processingAbstractThe crack problem of concrete is a widespread existence but again difficult in solve of engineering actual problem, thistextcarriedon a studyanalysisto a littlebitfamiliar crack problem in the concrete engineering, and aim at c

2、oncrete the circumstance put forward some prevention, processing measure.Keyword: Concrete crack prevention processing ForewordConcretes ising 1 kind is anticipate by the freestone bone,cement,waterand othermixturebut formationof thein addition materialof qualitybrittlenessnot and allmaterial.Becaus

3、ethe concrete construction transform with oneself, control etc. aseriesproblem,hardenmodelofintheconcreteexistence numeroustinyhole,spiritcaveand tinycrack,isexactly because these beginningstartblemishof existencejustmake the concrete present one some not and all the characteristic ofquality.The tin

4、y crack is a kind of harmless crack and acceptconcreteheavy,defendShen and a littlebitotheruse function not a creation to endanger.But after the concrete be subjectedto lotus carry, difference in temperature etc. function, tinycrack would continuously of expand with connect, end formationwe can see

5、withoutthe aid of instrumentsof macro view the crack be alsothe crackthatthe concreteoftensay in the engineering.Concrete building and Gou piece usually all take sewer to make of, because of crack of existence and development usually make inner part of reinforcing bar etc. material creation decay,lo

6、werreinforcedconcretematerialof loadingability,durableand anti- Shen ability, influence building of external appearance, service life, severity will threat arrive peoples life and property safety.A lot of all of crash of engineeringsis because of the unsteady development of the crack with theresultt

7、hat.Modernage scienceresearchwitha greatdealof of theconcreteengineeringpracticecertificate,intheconcrete engineering crack problem is ineluctable, also acceptable incertainly of the scope just need to adopt valid of measure will it endanger degree control at certain of scope inside.The reinforced c

8、oncrete norm is also explicit provision:Some structure at place of dissimilarity under the condition allowexistence certain the crack of width.But at under construction should as far as possible adopt a valid measure control crack creation, make the structure dont appear crack possibly or asfar as p

9、ossible decrease crack of amount and width, particularlywant to as far as possible avoid harmful crack of emergence,insure engineering quality thus.Concrete crack creation of the reason be a lot of and havealreadytransformedtocauseofcrack:Suchastemperature variety, constringency, inflation, the asym

10、metry sink to sinketc.reason cause of crack;Haveoutsidecarrythe crackthatthefunctioncause;Protectedenvironmentnot appropriatethecrack etc.caused withchemicaleffect.Wantdifferentiationto treat intheactualengineering,workouta problem accor dingto the actual circumstance.Intheconcreteengineeringthefami

11、liarcrackandthe prevention1. Stem Suo crack and preventionStem the Suo crack much appear after the concrete protect beover of a periodof time or concretesprinkleto buildto complete behind of around a week.Inthe cement syrup humidityof evaporate would creationstem Suo, and thiskindof constringencyisc

12、ant negative.Stem Suo crack of the creation be main is because ofconcreteinsideoutsidehumidityevaporatedegree dissimilarity but cause to transform dissimilarity of result:The concrete issubjectedto exteriorconditionofinfluence,surfacehumiditylosslead quick,transformbigger,innerpartdegree of humidity

13、 variety smaller transform smaller, bigger surface stem the Suotransformtobesubjectedtoconcreteinnerpartcontrol, creationmorebigpullshoulddintbutcreationcrack.The relative humidity is more low, cement syrup body stem Suo morebig, stem the Suo crack be more easy creation.Stem the Suo crack is much su

14、rface parallel lines form or the net shallow thin crack, width many between 0.05-0.2 mm, the flat surface part much seein the big physical volume concrete and follow it more in thinnerbeam plank short todistribute.Stem Suo crack usually the anti-Shen of influenceconcrete,cause the durableof the rust

15、eclipse influenceconcreteof reinforcingbar,under the functionof the water pressure dint would creation the water power split crackinfluence concrete of loading dint etc.Concrete stem the Suobe main with water ash of the concrete ratio, the dosage of the composition,cementofcement,gathertoanticipateo

16、fthe dosage of the property and dosage, in addition etc. relevant.Mainpreventionmeasure:Whilebeingtochoosetousethe constringency quantity smaller cement, general low hot watermire and powder ash from stovecement inthe adoption,lowerthedosage ofcement.Two isa concreteofstem theSuo be subjected to wat

17、er ash ratio of influence more big, water ash ratio morebig, stem Suo more big, so in the concrete match the ratio the design should as far as possible control good water ash ratioofchoose to use,theChan add inthe meantime accommodation ofreduce water.Three is strict control concrete mix blend withu

18、nderconstructionofmatchratio,useofconcretewater quantity absolute cant big in match ratio design give settleofusewaterquantity.Fouristheearlierperiodwhich strengthenconcretetoprotect,andappropriateextension protectofconcretetime.Winterconstructionwanttobe appropriate extension concrete heat preserva

19、tion to overlaytime,and Tu2 Shua protectto protect.Fiveisa constitutiontheaccommodation isinthe concretestructureof the constringency sew.2. The Su constringency crack and preventionSu constringency is the concrete is before condense, surfacebecause of losewaterquickerbut creationof constringency.Th

20、e Su constringencycrackisgeneralat dry heat or strongwind the weather appear, cracks much presenting in the center breadth,both ends be in the centerthinand the lengthbe different,witheach other not coherent appearance.Shorter crack general long20-30 cm, the longercrackcan reach to a 2-3 m, breadth1

21、-5 mm.It creation of main reason is:The concrete is eventually almosthavingno strengthorstrengthbeforetheNingverysmall, perhaps concrete just eventually Ning but strength very hour,be subjected to heat or compare strong wind dint of influence,theconcretesurfacelosewaterto leadquick,resultininthecapi

22、llary creation bigger negative press but make a concrete physical volume sharply constringency, but at this time thestrengthofconcreteagaincantresistitsconstringency,thereforecreationcracked.TheinfluenceconcreteSu constringency open the main factor of crack to have water ashratio,concreteof condense

23、 time,environmenttemperature,wind velocity, relative humidity.etc.Mainpreventionmeasure:One ischoose to use stem the Suo valuesmaller higher Huo sour salt of the earlier period strength or common the Huo sour brine mire.Two is strict the control waterash ratio,the Chan add to efficientlyreduce water

24、 to increment the collapse of concrete fall a degree and with easy, decreasecement and waterof dosage.Threeisto sprinklebeforebuildingconcrete,waterbasiclevelandtemplateeventosoak through.Four is in time to overlay the perhaps damp grass matoftheplasticsthinfilm,hemp sliceetc.,keepconcrete eventuall

25、y before the Ning surface is moist, perhaps spray toprotect etc. to carry on protect in the concrete surface.Fiveis in the heat and strong wind the weather to want to establish to hide sun and block breeze facilities, protect in time.3. Crack and prevention that the chemical reaction cause Alkali bo

26、nes anticipating the crack that reaction crack and reinforcing bar rust eclipse cause is the most familiar in thereinforced concrete structure of because of chemical reaction but cause of crack.Theconcreteblend a futurereunioncreationsome alkalescenceion, these ion with some activity the bone antici

27、pate creation chemical reaction and absorb surroundings environment in ofwater but the physicalvolume enlarge,make concretecrisploose, inflation open crack.In this kind of crack general emergenceconcrete structure usage period, once appear very difficultremediable, so should at under construction ad

28、opt valid the measure carry on prevention.Main of prevention measure:While being to choose to anticipate with the alkali activity small freestone bone.Two is the in addition which choose to use lowlye mire withlow alkalior have no alkali.Threeis the Chan whichchoose to use accommodation withanticipa

29、teto repressan alkali bone to anticipate reaction.Because the concrete sprinkle to build, flap Dao bad perhapsis a reinforcing bar protection layer thinner, the harmful material get into concrete to make reinforcing bar creation rust eclipse, the reinforcing bar physical volume of the rust eclipse i

30、nflation, cause concrete bulge crack, the crack of this kindtype much is a crack lengthways, follow the position of reinforcing bar appear.Usually of prevent measure from have:One is assurance reinforcing bar protection the thickness of thelayer.Twoisaconcreteclasstogotogetherwithtowant good.Threeis

31、aconcretetosprinkletonoteandflapDao airtightsolid.Fourisa reinforcingbar surfacelayerTu2 Shua antisepsis coating.Crack processingTheemergence of the cracknotonlywould influencestructure of whole with just degree, return will cause the rust eclipseof reinforcing bar, acceleration concrete of carboniz

32、ation,lowerdurableandanti-ofconcretetired,anti-Shen ability.Thereforeaccordingtothepropertyofcrackand concretecircumstancewe want differentiationto treat,intime processing, with assurance building of safety usage.The repair measure of the concrete crack is main to have thefollowingsome method:Surfac

33、erepairmethod, infusesyrup,the Qian sew method, the structure reinforce a method, concretedisplacement method, electricity chemistry protection methodand imitate to living from heal method.Surface repair the method be a kind of simple, familiar ofrepairmethod,itmainbeapplicabletostabilityandto struc

34、ture loading the ability dont have the surface crack ofinfluence and deep enter crack of processing.The processingmeasure that is usually is a surface in crack daubery cementsyrup,the wreathoxygen gummire or at concretesurfaceTu2 Shuapaint,asphaltetc.antisepsismaterial,at protectionof in the meantim

35、e forkeepingconcretefrom continueunder the influence of various function to open crack, usually can adoption thesurface in crack glue to stick glass fiber cloth etc. measure. 1, infuse syrup, the Qian sew methodInfusea syrupmethod main the concretecrackbeen applicableto have influence or have alread

36、y defend Shen request to thestructure whole of repair, it is make use of pressure equipments gum knot the material press into the crack of concrete, gum knot the material harden behind and concrete formation one be whole, thus reinforce of purpose.The in common use gum knot materialhas the cement th

37、e syrup, epoxy, A JiC Xi sour ester and gather ammonia ester to equalize to learn material.The Qian sew a method is that the crack be a kind of most in common use method in, it usually is follow the crack dig slot,the Qian fillSu intheslotor rigidwatermaterialwithattain closing crack of purpose.The

38、in common use Su material has PVCgum mire,plasticsointment,theD Jirubberetc.;Incommonuserigid water material is the polymer cement sand syrup. 2, the structure reinforce a methodWhen the crackinfluencearriveconcretestructureof function, willconsiderationadopttoreinforceamethodtocarryon processing to

39、 the concrete structure.The structure reinforcemedium in common use main have the following a few method:Thepieceofenlargementconcretestructureineveryaspect accumulate, outside the Cape department of the Gou piece packtype steel, adoption prepare should the dint method reinforce, glue to stick steel

40、 plate to reinforce, increase to establishfulcrumtoreinforceandjettheconcretecompensation reinforce.3, concrete displacement methodConcrete displacement method is processing severity damage concrete of a kind of valid method, this method be first willdamage oftheconcretepickandgetridof,thenagaindisp

41、lacement go into new of concrete or other material.The in common use displacement material have:Common concrete or thecement sand syrup,polymer or change sex polymer concreteor sand syrup.ConclusionThe crack is widespread in the concrete structure existenceof a kindof phenomenon, itof emergence not

42、onlywilllowerthe anti- Shen of building ability, influence building of usagefunction, and will cause the rust eclipse of reinforcing bar, the carbonization of concrete, lower the durable of material, influence building of loading ability, so want to carry on to the concrete crack earnest research, differentiation treat,adoption reasonable of the method carry on processing, and atunder constructionadopt variousvalidof preventionmeasure to preventioncrackofemergenceanddevelopment,assurancebuilding and Gou piece safety, stability work.FromCANADIAN JOURNAL OF CIVIL ENGINEERING