Ulwakhiwo olungoomatshini lokutyabeka udaka lube nenkqubela kwiminyaka yakutshanje. Udaka lokutyabeka luphuhliswe ukusuka kwindawo yemveli yokuzixuba ukuya kudaka oluqhelekileyo lomxube owomileyo kunye nodaka olumanzi. Ukusebenza kwayo okuphezulu kunye nokuzinza zizinto eziphambili zokukhuthaza uphuhliso lokutyatyekwa ngoomatshini, kwaye i-cellulose ether isetyenziswa njengodaka lokutyabeka I-core additive inendima engenakubuyiselwa. Kolu vavanyo, ngokulungelelanisa i-viscosity kunye nokugcinwa kwamanzi kwe-cellulose ether, kunye nokuguqulwa kokwenziwa, iziphumo zezibonakaliso zovavanyo ezifana nesantya sokugcinwa kwamanzi, ilahleko ye-2h yokungaguquguquki, ixesha elivulekileyo, ukunganyangeki kwe-sag, kunye nokuguquguquka kokutyabeka udaka kulwakhiwo olusetyenziswayo. wafunda. Ekugqibeleni, kwafunyaniswa ukuba i-ether ye-cellulose ineempawu zokugcinwa kwamanzi aphezulu kunye nepropati yokusonga kakuhle, kwaye ifaneleke ngokukodwa ukwakhiwa komatshini wokutyabeka udaka, kwaye zonke izibonakaliso zodaka lokutyabeka ziyahlangabezana nemigangatho kazwelonke.
Izinga lokugcinwa kwamanzi odaka lokutyabeka
Izinga lokugcinwa kwamanzi lokutyabeka udaka luyinto eyandayo xa i-viscosity ye-cellulose ether isuka kwi-50,000 ukuya kwi-100,000, kwaye iyindlela ehlayo xa isuka kwi-100,000 ukuya kwi-200,000, ngelixa izinga lokugcinwa kwamanzi kwi-cellulose ether yokutshiza ngomatshini lifikelele. ngaphezulu kwama-93%. Okukhona uphezulu izinga logcino lwamanzi kudaka, kokukhona udaka luyancipha ukopha. Ngexesha lovavanyo lokutshiza ngomatshini wokutshiza ngodaka, kwafunyaniswa ukuba xa izinga lokugcinwa kwamanzi kwi-ether yeselulosi lingaphantsi kwama-92%, udaka luthande ukopha emva kokuba lubekwe kangangexesha elithile, kwaye, ekuqaleni kokutshiza. , kulula ngokukodwa ukuvala umbhobho. Ke ngoko, xa ulungiselela udaka lokutyabeka olulungele ulwakhiwo olungoomatshini, kufuneka sikhethe i-cellulose ether enezinga eliphezulu lokugcinwa kwamanzi.
Ukutyabeka udaka 2h ukulahleka kokuhambelana
Ngokweemfuno ze-GB/T25181-2010 “I-Ready Mixed Mortar”, imfuno yokulahleka kweeyure ezimbini yodaka oluqhelekileyo lokutyabeka lungaphantsi kwama-30%. I-viscosity ye-50,000, i-100,000, i-150,000, kunye ne-200,000 isetyenziswe kwi-2h yokuvavanya ilahleko. Inokubonwa ukuba njengoko i-viscosity ye-cellulose ether isanda, ixabiso lelahleko le-2h lokuhambelana kodaka liya kuncipha ngokuthe ngcembe, nto leyo ebonisa ukuba i-viscosity ye-cellulose ether Ixabiso eliphezulu, ngcono ukuzinza kodaka kwaye kungcono ukusebenza anti-delamination yodaka. Nangona kunjalo, ngexesha lokutshiza kwangempela, kwafunyaniswa ukuba ngexesha lonyango lokulinganisa kamva, ngenxa yokuba i-viscosity ye-cellulose ether iphezulu kakhulu, ukudibanisa phakathi komdaka kunye ne-trowel kuya kuba kukhulu, okungahambelani nokwakhiwa. Ngoko ke, kwimeko yokuqinisekisa ukuba i-mortar ayihlali kwaye ayifuni, iphantsi kwexabiso le-viscosity ye-cellulose ether, ingcono.
Iiyure zokuvula udaka lokutyabeka
Emva kokuba udaka lokutyabeka lutshizwe eludongeni, ngenxa yokufunxwa kwamanzi kwi-substrate yodonga kunye nokunyuka komswakama kwindawo yodaka, udaka luya kwenza amandla athile ngexesha elifutshane, eliya kuchaphazela ukwakhiwa komgangatho olandelayo. . Ixesha lokuvala lihlalutyiwe. Ixabiso le-viscosity ye-cellulose ether ikuluhlu lwe-100,000 ukuya kwi-200,000, ixesha lokumisela alitshintshi kakhulu, kwaye libuye libe nokulungelelaniswa okuthile kunye nezinga lokugcinwa kwamanzi, oko kukuthi, ukuphakama kokugcinwa kwamanzi, ixesha elide. ixesha lokumisa udaka.
Ubumanzi bodaka lokutyabeka
Ilahleko yezixhobo zokutshiza inento eninzi yokwenza nodaka lokutyabeka. Ngaphantsi komlinganiselo ofanayo we-water-material, i-viscosity ephezulu ye-cellulose ether, iyancipha ixabiso le-fluidity yodaka. , oku kuthetha ukuba i-viscosity ephezulu ye-cellulose ether, inkulu ukuchasana komdaka kunye nokugqwesa okukhulu kwisixhobo. Ke ngoko, ukwakhiwa ngoomatshini bodaka lokutyabeka, i-viscosity esezantsi ye-cellulose ether ingcono.
Ukumelana ne-Sag yodaka lokutyabeka
Emva kokuba udaka lokutyatyekwa lutshizwe eludongeni, ukuba ukuxhathisa kwe-sag yodaka akulunganga, udaka luya kugxumeka okanye lutyibilike, luchaphazele ngokunzulu ukuthambeka kodaka, okuya kubangela ingxaki enkulu kulwakhiwo lwamva. Ke ngoko, udaka olulungileyo kufuneka lube ne-thixotropy egqwesileyo kunye nokumelana ne-sag. Uvavanyo lwafumanisa ukuba emva kokuba i-cellulose ether ene-viscosity ye-50,000 kunye ne-100,000 yakhiwe ngokuthe nkqo, iithayile zaya ngqo phantsi, ngelixa i-cellulose ether ene-viscosity ye-150,000 kunye ne-200,000 ayizange ihambe. I-engile isamiswe ngokuthe nkqo, kwaye akukho kutyibilika kuyakwenzeka.
Amandla odaka lokutyabeka
Kusetyenziswa i-50 000, 100 000, 150 000, 200 000, kunye ne-250 000 ye-cellulose ethers ukulungiselela iisampulu zodaka lokutyabeka ukuze kwakhiwe oomatshini, kwafunyaniswa ukuba ngokunyuka kwe-viscosity ye-cellulose ether, ixabiso lamandla lokutyabeka udaka liyancipha. Oku kungenxa yokuba i-cellulose ether yenza isisombululo esiphezulu se-viscosity emanzini, kwaye inani elikhulu leebhubhu zomoya ezizinzileyo ziya kuqaliswa ngexesha lokuxuba udaka. Emva kokuba i-samente iqina, la maqamza omoya aya kwenza inani elikhulu le-voids, ngaloo ndlela ukunciphisa ixabiso lamandla lodaka. Ngoko ke, udaka lokutyabeka olulungele ukwakhiwa komatshini kufuneka lukwazi ukuhlangabezana nexabiso lamandla elifunekayo kuyilo, kwaye i-ether ye-cellulose efanelekileyo kufuneka ikhethwe.
Ixesha lokuposa: Mar-15-2023