Olunye ulwahlulo olukhulu phakathi kodaka olomileyo kunye nodaka lwemveli kukuba udaka olomileyo lutshintshwa ngenani elincinci lezongezo zekhemikhali. Ukongeza udidi olunye lwezongezo kudaka olomileyo lubizwa ngokuba luhlengahlengiso oluphambili, ukongeza ezongezo ezibini nangaphezulu luhlengahlengiso lwesibini. Umgangatho wodaka olomileyo uxhomekeke ekukhethweni okuchanekileyo kwamacandelo kunye nokulungelelaniswa kunye nokuhambelana kwamacandelo ahlukeneyo. Izongezo zekhemikhali zibiza kakhulu kwaye zinempembelelo enkulu kwiipropati zodaka olomileyo. Ngoko ke, ekukhetheni izongezo, inani lezongezo kufuneka libe kwindawo yokuqala. Oku kulandelayo sisingeniso esifutshane ekukhethweni kweekhemikhali izongezo ze-cellulose ether.
I-Cellulose ether eyaziwa ngokuba yi-rheological modifier uhlobo lomxube osetyenziselwa ukunyenyisa iipropati ze-rheological zodaka olutsha oluxutywe, oluphantse lusetyenziswe kulo lonke uhlobo lodaka. Ezi propati zilandelayo kufuneka zithathelwe ingqalelo xa ukhetha iindidi kunye nemali eyongeziweyo:
(1) Ukugcinwa kwamanzi kumaqondo obushushu awahlukeneyo;
(2) ukutyeba, ukuqaqamba;
(3) Ubudlelwane phakathi kokuhambelana kunye neqondo lokushisa, kunye nefuthe kwi-consistency phambi kwe-electrolyte;
(4) imo kunye neqondo le-etherification;
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(6) Izinga lokuchithwa, imeko kunye nokugqitywa kokutshatyalaliswa.
Ukongeza kokongeza i-cellulose ether kumdaka owomileyo (njenge-methyl cellulose ether), unokongeza i-vinyl polyvinyl acid ester, oko kukuthi, ukuguqulwa kwesibini. Isibophelelo se-inorganic kudaka (isamente, igypsum) inokuqinisekisa amandla acinezelayo aphezulu, kodwa inefuthe elincinane kumandla okuqina kunye namandla okugoba. I-Vinyl polyvinyl ester yakha ifilimu e-elastic emngxunyeni wamatye e-samente, yenza udaka lukwazi ukuthwala umthwalo ophezulu we-deformation, ukuphucula ukumelana nokunxiba. Kuye kwangqinwa ngokuqhelisela ukuba ngokongeza izixa ezahlukeneyo ze-methyl cellulose etere kunye nevinyl polyvinyl ester kudaka olomileyo, umaleko obhityileyo wokugquma ipleyiti edibanisa udaka, udaka lokutyabeka, udaka oluhonjisiweyo lokutyabeka, udaka lwekhonkrithi efakwe umoya kunye nodaka lokuzilinganisa lomgangatho wokugalela unokulungiswa. Ukudibanisa ezi zimbini azikwazi nje ukuphucula umgangatho wodaka, kodwa nokuphucula kakhulu ukusebenza kakuhle kokwakhiwa.
Kwisicelo esisebenzayo, ukwenzela ukuba kuphuculwe ukusebenza okubanzi, kuyimfuneko ukusebenzisa ii-admixtures ezininzi. Owona mdlalo ulungileyo phakathi komlinganiselo wokongeza, uluhlu oluchanekileyo lwedosi, umlinganiselo, unokuvela kwimiba eyahlukeneyo ibe nefuthe elithile lokuphucula ukusebenza kodaka, kodwa iziphumo zokuguqulwa kodaka xa lusetyenziswa lulodwa lulinganiselwe, ngamanye amaxesha lude lube nefuthe elibi, njengefayibha enye, ekwandiseni ukuncamathela kodaka, ukunciphisa iqondo lokuhluzwa kwamatye ngexesha elinye kunye nodaka, nto leyo ekhokelela ekugcinweni kwamanzi kakhulu, nangona kunjalo. ukuncipha kwamandla oxinzelelo. Xa i-ejenti yokungenisa umoya yongezwa, idigri ye-delamination ye-mortar kunye nokusetyenziswa kwamanzi kunokunciphisa kakhulu, kodwa amandla oxinzelelo omdaka uya kuncipha ngenxa yeebhubhu ezininzi. Ukuphucula udaka lwe-masonry ukuze usebenze kakhulu, ngelixa uthintela ingozi kwenye ipropati, amandla okuhambelana nodaka lwe-masonry, i-degree of stratification kunye nokuhlangabezana neemfuno zobunjineli kunye nemimiselo yenkcazo yobugcisa, kwangaxeshanye, musa ukusebenzisa i-lime putty, ukonga isamente, ukukhuselwa kwendalo, njl., ukusuka ekunciphiseni kwamanzi, i-viscosity, ukujiya kwamanzi kunye nokuphuhlisa i-air-perspective kufuneka ithathe amanyathelo okuphuhlisa iplastiki kunye ne-air-perspective. sebenzisa imixube edibeneyo.
Ixesha lokuposa: Apr-29-2022