I-cellulose ether HPMC kwi-samente mortar kunye ne-gypsum slurry, ikakhulu idlala indima yokugcina amanzi kunye nokuqina, inokuphucula ngempumelelo ukunamathela kunye nokumelana nokuwa kwe-slurry.
Ubushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya zinokuchaphazela izinga lokuphuma kwamanzi kwisamente kunye neemveliso ezisekwe kwi-gypsum. Ngamaxesha onyaka ahlukeneyo, isiphumo sokugcina amanzi kwi-slurry sinokulungiswa ngokunyusa okanye ukunciphisa ubungakanani be-HPMC. Ekwakhiweni kobushushu obuphezulu ehlotyeni, ukuze kufezekiswe isiphumo sokugcina amanzi, kuyimfuneko ukongeza iimveliso ze-HPMC ngobuninzi obaneleyo ngokwefomula. Ngaphandle koko, kuya kubakho ukufuma okwaneleyo, ukunciphisa amandla, ukuqhekeka, idrum engenanto kunye nokuchitheka okubangelwa kukoma ngokukhawuleza, kunye nezinye iingxaki zomgangatho. Njengoko ubushushu buncipha, ubungakanani be-HPMC bunokuncipha kancinci kancinci, kwaye isiphumo esifanayo sokugcina amanzi sinokufezekiswa.
Kukho umahluko kunye nezizathu zesiphumo sokugcinwa kwamanzi sexabiso elifanayo leemveliso ezongeziweyo ze-HPMC. Iimveliso ezibalaseleyo zochungechunge lwe-HPMC zinokusombulula ngempumelelo ingxaki yokugcina amanzi phantsi kobushushu obuphezulu. Ngexesha lobushushu obuphezulu, ngakumbi kwiindawo ezishushu nezomileyo kunye nokwakhiwa komaleko omncinci kwicala elinelanga, i-HPMC esemgangathweni ophezulu iyafuneka ukuphucula ukugcinwa kwamanzi kwe-slurry. I-HPMC esemgangathweni ophezulu, amaqela ayo e-methoxy kunye ne-hydroxypropyl ecaleni kokusasazwa okufanayo kwe-cellulose molecular chain, inokuphucula i-hydroxyl kunye ne-ether bond kwi-athomu ze-oxygen kunye nokukwazi kwe-hydrogen bond yokudibanisa amanzi, yenze amanzi akhululekileyo abe ngamanzi adibeneyo. Kwaye isasazwe ngempumelelo kwi-slurry kwaye igqunywe zonke iisuntswana eziqinileyo, i-hydration reaction kunye nezinto ze-inorganic cementing, kunye nokwakheka komaleko wefilimu yokumanzisa, amanzi kwisiseko akhutshwa kancinci kancinci ixesha elide, ukuze kulawulwe ngempumelelo ukufuma kwamanzi okubangelwa yimozulu eshushu ephezulu, ukuze kufezekiswe ukugcinwa kwamanzi okuphezulu.
Ukugcinwa kwamanzi kweemveliso ze-HPMC kudla ngokuchaphazeleka zezi zinto zilandelayo:
1. Ukufana kwe-HPMC: Ukusabela okufanayo kwe-HPMC, i-methoxy, ukusasazwa okufanayo kwe-hydroxypropoxy, ukugcinwa kwamanzi okuphezulu.
Ubushushu bejeli yobushushu obu-2 be-HPMC: Ijeli eshushu inexabiso eliphezulu
ubushushu kunye nezinga eliphezulu lokugcina amanzi; kungenjalo, inezinga eliphantsi lokugcina amanzi.
3. Ubuninzi be-HPMC: Xa ubukhulu be-HPMC busanda, izinga lokugcina amanzi nalo liyakhula. Xa ubukhulu be-HPMC busanda
Ukuba i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwesantya sokugcina amanzi kudla ngokuba buthathaka.
4. Umxholo we-HPMC: Okukhona i-HPMC yongezwa kakhulu, kokukhona izinga lokugcina amanzi liphezulu kwaye kokukhona isiphumo sokugcina amanzi singcono. Kuluhlu lwe-0.25-0.6%, izinga lokugcina amanzi landa ngokukhawuleza ngokonyuka kwesixa esongeziweyo. Xa isixa esongeziweyo sanda ngakumbi, umkhwa wokunyuka kwesixa sokugcina amanzi wacotha.
Ixesha lokuthumela: Julayi-29-2022