Udaka oluxutywe ngamanzi luyisamente, i-fine aggregate, umxube, amanzi kunye nezinto ezahlukeneyo ezimiselwa ngokwendlela esebenza ngayo. Ngokwemilinganiselo ethile, emva kokulinganiswa nokuxutywa kwisikhululo sokuxuba, luthuthwa luye kwindawo olusetyenziswa kuyo yilori yokuxuba, luze lufakwe kwisixhobo esikhethekileyo. Umxube omanzi ugcinwa kwisikhongozeli kwaye usetyenziswe ngexesha elichaziweyo.
I-Hydroxypropyl methylcellulose isetyenziswa njengearhente yokugcina amanzi kunye ne-retarder yesamente mortar ukwenza i-mortar ikwazi ukupompa. Isetyenziswa njenge-binder kwi-plaster yokuplasta, iphucula ukusasazeka kwaye yandisa ixesha lokusebenza. Ukusebenza kokugcinwa kwamanzi kwe-hydroxypropyl methylcellulose HPMC kuthintela ukuqhekeka ngenxa yokoma ngokukhawuleza emva kokusetyenziswa, kwaye kwandisa amandla emva kokuqina. Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-hydroxypropyl methylcellulose HPMC, kwaye ikwangumsebenzi abavelisi abaninzi be-wet-mix mortar basekhaya abawunika ingqalelo. Izinto ezichaphazela isiphumo sokugcinwa kwamanzi se-mortar exutywe ngamanzi ziquka ubungakanani be-HPMC eyongeziweyo, i-viscosity ye-HPMC, ubuncinci bee-particles, kunye nobushushu bendawo yokusetyenziswa.
Indima ebalulekileyo ye-hydroxypropyl methylcellulose HPMC kwi-wet-mix mortar ikakhulu inemiba emithathu, enye kukugcina amanzi kakuhle, enye yimpembelelo ekuhambelaneni nasekuqineni kwe-thixotropy ye-wet-mix mortar, kwaye eyesithathu kukusebenzisana nesamente. Isiphumo sokugcina amanzi se-cellulose ether sixhomekeke ekufunxeni kwamanzi kwi-base maleage, ukwakheka kwe-mortar, ubukhulu be-mortar maleage, imfuno yamanzi ye-mortar, kunye nexesha lokubeka izinto zokubeka. Okukhona i-hydroxypropyl methylcellulose icaca kakhulu, kokukhona i-water retention ingcono.
Izinto ezichaphazela ukugcinwa kwamanzi kwi-wet-mix mortar ziquka i-cellulose ether viscosity, ubungakanani bokongeza, ubuncinci beentwana kunye nobushushu bokusetyenziswa. Okukhona i-viscosity ye-cellulose ether inkulu, kokukhona ukusebenza kokugcinwa kwamanzi kungcono. I-Viscosity yiparameter ebalulekileyo yokusebenza kwe-HPMC. Kwimveliso efanayo, iziphumo ze-viscosity ezilinganiswa ngeendlela ezahlukeneyo zahlukile kakhulu, kwaye ezinye zide zibe nomahluko ophindwe kabini. Ke ngoko, xa kuthelekiswa i-viscosity, kufuneka yenziwe phakathi kweendlela zovavanyo ezifanayo, kubandakanya ubushushu, i-rotor, njl.
Ngokubanzi, okukhona i-viscosity iphezulu, kokukhona isiphumo sokugcina amanzi singcono. Nangona kunjalo, okukhona i-viscosity iphezulu kwaye ubunzima be-molecular ye-HPMC buphezulu, ukwehla kokunyibilika kwayo kuya kuba nefuthe elibi kumandla kunye nokusebenza kolwakhiwo lwe-mortar. Okukhona i-viscosity iphezulu, kokukhona isiphumo sokutyeba sibonakala ngakumbi kwi-mortar, kodwa ayilingani ngokuthe ngqo. Okukhona i-viscosity iphezulu, kokukhona i-mortar emanzi iya kuba ne-viscous ngakumbi, oko kukuthi, ngexesha lokwakhiwa, ibonakaliswa njengokunamathela kwi-scraper kunye nokunamathela okuphezulu kwi-substrate. Kodwa akuncedi ukwandisa amandla olwakhiwo lwe-mortar emanzi ngokwayo. Ngexesha lokwakhiwa, ukusebenza kwe-anti-sag akubonakali. Ngokuchasene noko, i-hydroxypropyl methylcellulose eguquliweyo ene-viscosity ephakathi nephantsi ine-viscosity egqwesileyo ekuphuculeni amandla olwakhiwo lwe-mortar emanzi.
Okukhona i-HPMC ether cellulose eyongezwayo kwi-mortar exutywe ngamanzi iphezulu, kokukhona ukusebenza kokugcinwa kwamanzi kuphucuka, kwaye okukhona i-viscosity iphezulu, kokukhona ukusebenza kokugcinwa kwamanzi kuphucuka. Ukuqina kwayo kukwayindlela ebalulekileyo yokusebenza kwe-hydroxypropyl methylcellulose.
Ukuqina kwe-hydroxypropyl methylcellulose nako kunempembelelo ethile ekugcinweni kwamanzi. Ngokubanzi, kwi-hydroxypropyl methylcellulose ene-viscosity efanayo kodwa enobuncinci obahlukileyo, kokukhona incinci kokukhona incinci. Isiphumo sokugcina amanzi singcono.
Kwi-mortar exutywe ngamanzi, ubungakanani bokongeza be-cellulose ether HPMC buphantsi kakhulu, kodwa bunokuphucula kakhulu ukusebenza kolwakhiwo lwe-mortar exutywe ngamanzi, kwaye sisongezelelo esiphambili esichaphazela ukusebenza kolwakhiwo lwe-mortar. Ukukhetha ngokufanelekileyo i-hydroxypropyl methylcellulose echanekileyo kunempembelelo enkulu ekuphuculeni ukusebenza kwe-mortar exutywe ngamanzi.
Ixesha lokuthumela: Matshi-31-2023