WhatIsTheDifferenceBetweenThick
Thedifferencebetweenthickandthinfireproofcoatingsismainly reflectedinthefollowingaspects:
Composition
Thickfireproofcoating:themaincomponentisinorganicheatinsulationmaterial,showing granularsurfaceandsmalldensity
Thinfireproofcoating:mainlycomposedofbasematerial,dehydratingagent,carbonforming agentandfoamingagent
Fireproofprinciple
Thickfireproofcoating:alsoknownasnon-intumescentfireproofcoating,thecoatingwillnot expandThefireproofingmechanismistousetheinherentgoodadiabaticpropertyofthecoating topreventtheheatoffirefrombeingtransferredtosteel,andtoformakindofdenseglaze underhightemperature,whichcaneffectivelyisolateoxygenandhavetheeffectofreflecting heattodelaythetemperatureriseofsteelstructure.
Thinfireproofcoating:alsoknownasintumescentfireproofcoating,thecoatingexpandswhenit meetsheat.Theprincipleoffireproofingisthatwhenthetemperaturerisestoacertaindegree, thedehydratingagentpromptsthepolyhydroxycompoundtodehydrateandcarbonise,and undertheactionofalargenumberofgasesreleasedfromthedecompositionofthefoaming agent,thecoatingexpands,andtheexpansionmultiplescanbeuptodozensoftimesoreven tensoftimestoformadensefoamycarbonisedinsulationlayer,thuspreventingtheheatfrom beingtransmittedtothesteelstructure
Appearanceofcoating
Thickfireproofcoating:theappearanceofthecoatingisrougherthanthethinone
Thintypefireproofcoating:thesurfaceofcoatingappearanceisrougher,butitisbetterthanthe thicktype
FireResistanceLimit
Thickfireproofcoating:itcanreachthefireresistancelimitofmorethan3hours.
Thintypefireproofcoating:thestatespecifiesthatitsfireresistancelimitisbelow25hours
ConstructionRequirements
Thickfireproofingcoating:sprayingorsmearingisgenerallyadoptedintheconstruction,the coatingisthickerandthenumberoftimesofconstructionismore,soitisnecessarytocontrol theconstructionthicknessofeachtimetopreventproblemssuchasflowingandcracking.
Referencedosage20-22kg/㎡/25mm
Thinfireproofcoating:theconstructionmethodisrelativelysimple,generallyspraying construction,highconstructionefficiency,canbecompletedinashorttimeHowever,the humidityandtemperaturerequirementsoftheconstructionenvironmentarerelativelyhigh,and careshouldbetakentoavoidthecoatingbeingdamporfrozenduringtheconstructionprocess
Referencedosage12kg/㎡/mm
Environmentalperformance
Thickfireproofcoating:itdoesnotproducesmoke,hasnoirritatingodouranddoesnotrelease harmfulgases,andisagreenbuildingmaterial
ThinFireproofCoating:Itmayreleaseflameretardantgaswhenitexpandsincaseoffire,andit hassomepollutiontotheenvironment
Scopeofapplication
Thick-typefireproofcoating:itissuitableforfireproofcoatingandfireproofprotectionof load-bearingmembersofsteelstructureinvariousnewly-built,expandedandreconstructed industrialandcivilbuildingprojects,especiallysuitableforplaceswithhighfire-resistancelimit requirementsandstrictrequirementsforstabilityoffireproofperformance,suchashigh-rise
all-steelstructure,multi-storeyfactorybuildingsteelstructureandsoon.
Thinfireproofcoating:Itissuitableforsteelstructurecomponentssupportingsingle-storey columns,beams,roofload-bearingcomponentsandevacuationstaircases,etcinthe fire-resistantlevelofbuildingdesignandfireprotection;steelstructurecomponentssupporting single-storeyandmulti-storeycolumns,beams,roofload-bearingcomponentsandevacuation staircasesinthefire-resistantlevelfromtwotofour;itiscommonlyusedinindoorexposedsteel structures,lightroofsteelstructuresandsteelstructureswithdecorativeneedswhenthe fire-resistantlimitofitisspecifiedtobe1.5horless.Whenthefireresistancelimitis1.5horless.