Raws li thaum ntxov xyoo 1930s, polymer binders tau siv los txhim kho kev ua haujlwm ntawm mortar.Tom qab cov tshuaj pleev xim polymer tau ua tiav rau hauv kev ua lag luam, Walker tau tsim cov txheej txheem tshuaj tsuag kom qhuav, uas pom tau hais tias cov tshuaj pleev xim rau hauv daim ntawv ntawm cov hmoov roj hmab, ua qhov pib ntawm lub sijhawm ntawm polymer hloov qhuav sib xyaw mortar.
Tau ntau tshaj 100 xyoo, cov vuas luaj ceramic tau siv los npog cov phab ntsa thiab cov plag tsev.Niaj hnub no, lawv tau dhau los ua cov khoom siv kho kom zoo nkauj tseem ceeb.Cov vuas ntawm ntau qhov ntau thiab tsawg, qauv, thiab qib tuaj yeem pom txhua qhov chaw.Nrog kev nce qib ntawm cov pobzeb ceramatary technology, lub cev ntawm cov vuas luaj ceramic tau dhau los ua tuab thiab loj dua, cov nyom zoo rau kev tso cov vuas luaj ceramic.Yuav ua li cas ua kom cov vuas luaj loj loj lo kom ruaj khov thiab ua kom muaj kev ntseeg tau ntev ntev tau dhau los ua qhov tseem ceeb ntawm kev saib xyuas hauv kev kho kom zoo nkauj niaj hnub.Adhesive cov ntaub ntawv (xws li polymer) yog wetted nyob rau saum npoo ntawm ceramic vuas, tsim ib tug wetting lub xeev ntawm ob, uas ua rau ib tug me me molecular spacing ntawm ob.Nws thiaj li, ib tug loj loj intermolecular quab yuam yog tsim nyob rau hauv daim ntawv cog lus interface, nruj nreem khi cov khoom nplaum nrog cov pobzeb ceramic.Nrog kev nce qib ntawm cov pobzeb sib xyaw ua ke thev naus laus zis yog qhov nyuaj los muab ntau qhov khoob rau kev ua rau Anchoring.Txawm li cas los xij, kev sib txuas ntawm intermolecular tau dhau los ua qhov tseem ceeb.
Redispersible latex hmoov (RDP) tsim ib lub network polymer hauv cov khoom mortar, txuas cov vuas thiab mortar los ntawm kev sib cuam tshuam cov rog.Txawm hais tias cov vuas yog denser, lawv tuaj yeem ua raws li cov tshuaj khib nyiab.Redispersible latex hmoov yog tsim los ntawm polymerization ntawm ob los yog ntau tshaj polymers, thiab muaj sib txawv hardness raws li qhov sib txawv proportions ntawm polymer muaj pes tsawg leeg.Thaum nyob rau hauv qhov kub thiab txias, cov roj hmab hmoov yuav pom qhov sib txawv ntawm cov softening vim nws tus kheej hardness.Qhov nyuaj ntawm cov nplaum nplaum, qhov qis dua ntawm cov softening ntawm tib qhov kub thiab txias, thiab lub zog muaj peev xwm tiv thaiv sab nraud ntawm qhov kub thiab txias.Yog li ntawd, rau cov nplaum nplaum siv rau hauv cov nplais pobzeb nplaum, qhov tseem ceeb yuav tsum tau muab rau kev xaiv cov tawv tawv tawv nplaum, uas tuaj yeem ua kom muaj kev ruaj ntseg ntev ntev hauv qhov kub thiab txias.Thaum siv cov txheej txheem nyias txheej rau cov pobzeb nteg kev tsim kho, kom yooj yim ntawm kev tsim kho, cov neeg ua haujlwm yuav xaiv los siv cov kua nplaum rau ntawm thaj chaw loj ua ntej pib ua haujlwm tiling.Thaum lub sijhawm txheej txheem no, cov nplaum nplaum nplaum nplaum yuav tsim cov tawv nqaij ntawm qhov chaw raug vim yog ib puag ncig cua ceev, substrate dej nqus, thiab sab hauv cellulose ether dissolution thiab txav.Vim lub fact tias wetting yog tus yuam sij rau kev sib raug zoo ntawm cov ntaub ntawv, thaum lub crust yog nyuaj rau tawg, nws yuav ua rau nws nyuaj rau cov pobzeb nplaum rau ntub cov pobzeb nto, thaum kawg cuam tshuam lub zog ntawm kev sib raug zoo.Xaiv redispersible latex hmoov, ntawm ib sab, vim nws cov qauv, nws tuaj yeem ua lub luag haujlwm hauv kev tuav dej, ncua sijhawm ntawm hydration thiab tawv nqaij.Ntawm qhov tod tes, nws tuaj yeem txhim kho lub zog adhesion ntawm ib cheeb tsam, txawm tias qhov chaw infiltration txo, nws tseem tuaj yeem ua kom lub zog adhesion tag nrho.Nyob rau tib lub sijhawm, nws tseem ceeb heev uas yuav tsum xaiv cov cellulose ether kom tsim nyog.Raws li qhov loj ntawm cov vuas luaj ceramic nce, nws yooj yim dua kom muaj kev hollowing thiab txawm tias qhov tshwm sim ntawm cov pobzeb ceramic detachment tom qab tso.Qhov teeb meem no yog ze ze rau qhov yooj ntawm cov khoom sib txuas.Tej hub vuas muaj qhov siab ceev thiab qis deformation, thiab theem pib txheej yuav muaj kev deformation tshwj xeeb vim muaj ntau yam sab nraud thiab sab hauv.Cov nplais pobzeb nplaum siv los ua cov txheej txheem sib txuas yuav tsum muaj peev xwm nqus tau qhov kev ntxhov siab los ntawm deformation.Yog tias cov nplaum nplaum nplaum nplaum tsis muaj cov nplaum nplaum los yog muaj cov ntsiab lus ntawm cov nplaum nplaum, nws yuav nyuaj rau nqus cov kev ntxhov siab los ntawm deformation, ua rau tag nrho cov paving system maj mam poob ntawm cov ntsiab lus tsis muaj zog, tsim hollow nruas.
Redispersible latex hmoov tuaj yeem muab cov nplais nplaum nrog lub peev xwm los hloov kho kev ntxhov siab deformation, uas txhim kho qhov yooj yim ntawm cov pobzeb nplaum.Nyob rau hauv cov txheej txheem no, lub rigidity ntawm ceramic pobzeb nplaum feem ntau yog muab los ntawm cov ntaub ntawv inorganic xws li xis mas thiab xuab zeb, thaum yooj yog muab los ntawm nplaum hmoov.Polymer nkag mus rau hauv lub pores ntawm cement pob zeb, tsim ib lub network polymer uas ua hauj lwm raws li ib tug elastic daim ntawv cog lus ntawm rigid Cheebtsam, muab nws yooj.Thaum deformation tshwm sim, lub network polymer tuaj yeem nqus cov kev ntxhov siab, kom ntseeg tau tias cov khoom tsis sib xws tsis tawg lossis puas.Yog li ntawd, kev txhim kho qhov yooj yim ntawm cov ntaub nplaum yog qhov tseem ceeb rau kev txo qhov hollowing.Tus nqi tsim nyog ntawm cov nplaum nplaum tuaj yeem txhim kho kev tsim cov qauv sib txuas ntawm cov polymer hauv cov nplais pobzeb nplaum.
Post lub sij hawm: Aug-08-2023