IHydroxypropyl methylcellulose (HPMC)ubukhulu becala idlala indima yokugcina amanzi, ukujiya kunye nokuphucula ukusebenza kolwakhiwo kwisamente, igypsum kunye nezinye izinto zomgubo. Ukusebenza ngokugqwesileyo kokugcinwa kwamanzi kunokuthintela ngokufanelekileyo umgubo ekumisweni kunye nokuqhekeka ngenxa yokulahlekelwa kwamanzi amaninzi, kwaye wenze i powder ibe nexesha elide lokwakha.
Yenza ukhetho lwezixhobo ze-cementitious, i-aggregates, i-aggregates, i-agent egcina amanzi, i-binders, i-modifiers yokusebenza yokwakha, njl. Umzekelo, udaka olusekelwe kwi-gypsum lunomsebenzi ongcono wokudibanisa kunodaka olusekelwe kwi-samente kwindawo eyomileyo, kodwa ukusebenza kwayo kwe-bonding kuncipha ngokukhawuleza phantsi kwemeko yokufunxa ukufuma kunye nokufunxa kwamanzi. Amandla okudibanisa okujoliswe kuwo odaka lokutyabeka kufuneka kuncitshiswe umaleko ngomqolo, oko kukuthi, amandla okudibanisa phakathi komgangatho wesiseko kunye ne-arhente yonyango lwe-interface ≥ amandla okudibanisa phakathi kodaka lwesiseko kunye ne-arhente yonyango lwe-interface ≥ ibhondi phakathi kodaka lwesiseko kunye nodaka lwamaleko angaphezulu Amandla ≥ amandla okudibanisa phakathi kodaka lomphezulu kunye ne-putty.
Injongo efanelekileyo ye-hydration ye-cement mortar kwisiseko kukuba imveliso ye-cement hydration ithatha amanzi kunye nesiseko, ingena kwisiseko, kwaye yenza "uqhagamshelwano oluphambili" olusebenzayo kunye nesiseko, ukuze kufezekiswe amandla afunekayo ebhondi. Ukunkcenkceshela ngokuthe ngqo kumphezulu wesiseko kuya kubangela ukusasazwa okunzulu ekufunxeni kwamanzi kwisiseko ngenxa yokungafani kobushushu, ixesha lokunkcenkceshela, kunye nokufana kwamanzi. Isiseko sinokufunxa okuncinci kwamanzi kwaye siya kuqhubeka nokufunxa amanzi kumdaka. Ngaphambi kokuba i-cement hydration iqhube, amanzi axutywe, achaphazela i-cement hydration kunye nokungena kweemveliso ze-hydration kwi-matrix; isiseko sinokufunxa okukhulu kwamanzi, kwaye amanzi kumdaka ageleza ukuya kwisiseko. Isantya semfuduko esiphakathi siyacotha, kwaye kwakhiwe umaleko otyebileyo wamanzi phakathi kodaka kunye ne-matrix, ekwachaphazela amandla ebhondi. Ngoko ke, ukusebenzisa indlela yokunkcenkceshela isiseko esiqhelekileyo akuyi kuphumelela kuphela ukusombulula ngokufanelekileyo ingxaki yokutshatyalaliswa kwamanzi aphezulu kwisiseko sodonga, kodwa kuya kuchaphazela amandla okubambisana phakathi kodaka kunye nesiseko, okubangelwa ukugoba kunye nokuqhekeka.
Impembelelo ye-cellulose ether kuxinzelelo kunye nokucheba kodaka lwesamente.
Ngokudityaniswa kwei-cellulose ether, amandla oxinzelelo kunye ne-shear ayancipha, kuba i-cellulose ether ithatha amanzi kwaye ikhulise i-porosity.
Ukusebenza kokubambisana kunye namandla okudibanisa kuxhomekeke ekubeni i-interface phakathi kodaka kunye nesiseko sezinto eziphathekayo sinokuzinza kwaye zifezekiswe ngokufanelekileyo "uqhagamshelwano oluphambili" ixesha elide.
Izinto ezichaphazela amandla ebhondi ziquka:
1. Iimpawu zokufunxa amanzi kunye noburhabaxa be-interface ye-substrate.
2. Umthamo wokugcina amanzi, amandla okungena kunye namandla okwakhiwa kodaka.
3. Izixhobo zokwakha, iindlela zokwakha kunye nendawo yokwakha.
Ngenxa yokuba umaleko wesiseko wokwakhiwa kodaka unokufunxwa kwamanzi athile, emva kokuba isiseko sesiseko sifunxa amanzi eludaka, ukwakhiwa kodaka kuya kuba mbi, kwaye kwiimeko ezinzima, izinto zesamente kumdaka aziyi kugcwala ngokupheleleyo, okukhokelela kumandla, okhethekileyo Isizathu kukuba amandla ojongano phakathi kodaka oluqinileyo kunye nodaka lwesiseko luya kuncipha, lubangele ukuqhekeka kunye nodaka lwesiseko. Isisombululo sendabuko kwezi ngxaki kukunkcenkceshela isiseko, kodwa akunakwenzeka ukuqinisekisa ukuba isiseko sinomanzi ngokulinganayo.
Ixesha lokuposa: Apr-25-2024