HPMC (Hydroxypropyl Methyl Cellulose) bụ ihe polymer a na-ejikarị eme ihe n'ụlọ, karịsịa na ihe ndị dabeere na ciment na ihe ndị dabeere na gypsum. Ọ nwere ezigbo mmiri solubility, adhesion, njigide mmiri na ihe ndị na-eme ka ọ dịkwuo mma, ya mere a na-eji ya eme ihe na ngwa agha, putty powder, tile nrapado na ihe ndị ọzọ.
1. Ihe na-akpata mbelata na mgbawa nke ihe ụlọ
N'oge usoro siri ike, ihe ụlọ na-emekarị ka ọ daa ụda n'ihi ikuku mmiri, mmeghachi omume kemịkalụ na mgbanwe nke ihe gburugburu ebe obibi dị n'èzí, na-eduga ná nrụgide nrụgide na nhazi mgbawa. Ụdị isi nke shrinkage gụnyere:
Ngwunye plastik: Mgbe ihe simenti na-esibeghị ike, ụda ahụ na-adaba n'ihi ikuku mmiri na-agba ngwa ngwa.
Mbelata akọrọ: Mgbe ihe na-esiwanye ike, a na-ekpuchi ya na ikuku ruo ogologo oge, na mmiri na-ekpochapụ nwayọọ nwayọọ, na-eme ka ụda olu na-ebelata.
Mbelata okpomọkụ: Mgbanwe olu nke mgbanwe okpomọkụ na-ebute, karịsịa na gburugburu ebe nwere nnukwu ọdịiche dị n'etiti ehihie na abalị.
Autogenous shrinkage: N'oge usoro hydration ciment, olu dị n'ime na-ebelata n'ihi oriri nke mmiri site na mmeghachi omume hydration.
Mbelata ndị a na-ebutekarị mkpokọta nrụgide n'ime ihe ahụ, na-emecha na-akpata microcracks ma ọ bụ mgbawa, nke na-emetụta ịdịte aka na ịma mma nke ihe owuwu ụlọ. Iji zere ihe omume a, a na-achọkarị mgbakwunye iji meziwanye arụmọrụ nke ihe ahụ, HPMC bụkwa otu n'ime ha.
2. Usoro nke omume nke HPMC
HPMC na-arụ ọrụ dị mkpa n'ibelata mbelata na mgbawa nke ihe ụlọ, nke a na-enwetakarị site na usoro ndị a:
Njide mmiri: HPMC nwere ikike njigide mmiri siri ike ma nwee ike ịmepụta ihe nkiri na-ejide mmiri na ngwa agha ma ọ bụ putty ntụ ntụ iji mee ka ọnụ ọgụgụ mmiri na-ekpo ọkụ kwụsịlata. Ebe ọ bụ na mmiri na-ekpo ọkụ ngwa ngwa n'ime ihe ahụ ga-eme ka ọnyà plastik, mmetụta njigide mmiri nke HPMC nwere ike ibelata mmalite nkwụsịtụ mmalite nke ọma, mee ka mmiri dị n'ime ihe ahụ zuru oke, si otú ahụ na-akwalite mmeghachi omume hydration zuru oke nke ciment na ibelata nkwụsịtụ nke mgbawa nke sitere na ya. mmiri na-efunahụ n'oge usoro ihicha. Tụkwasị na nke ahụ, HPMC nwere ike imeziwanye arụmọrụ nke ihe n'okpuru mmiri na ọnọdụ akọrọ ma belata mgbawa nke mmiri na-efunahụ.
Mmetụta na-eme ka ahụ sie ike: HPMC bụ onye na-agba ume nke nwere ike ịbawanye nkwụsi ike na viscosity nke ngwa agha nke ọma ma welie njikọ nke ihe ahụ. N'oge usoro ihe owuwu ahụ, ọ bụrụ na ihe ahụ dị oke mkpa, ọ dị mfe delaminate ma ọ bụ sag, na-eme ka elu na-adịghị mma ma ọ bụ ọbụna mgbawa. Site na iji HPMC, ngwa agha ahụ nwere ike ịnọgide na-enwe viscosity kwesịrị ekwesị, welie ike na njupụta elu nke ihe ahụ mgbe arụchara ya, ma belata ohere nke ịgbawa. Tụkwasị na nke ahụ, HPMC nwekwara ike ịkwalite nkwụsị nke ihe onwunwe ma melite nkwụsị mgbawa ya.
Meziwanye mgbanwe nke ihe ahụ: ụmụ irighiri ihe HPMC nwere ike ịrụ ọrụ ụfọdụ n'ịkwalite mgbanwe na ihe ndị sitere na ciment ma ọ bụ ihe ndị dabeere na gypsum, nke mere na ihe ahụ na-eme ka ọ dịkwuo mma na nkwụsị nkwụsị mgbe ọ gwọchara ya. Ebe ọ bụ na a na-ejikarị ihe owuwu ụlọ na-enwe nrụgide ma ọ bụ na-agbagọ n'okpuru mgbanwe mgbanwe okpomọkụ na ibu, mgbe agbakwunyere HPMC, mgbanwe nke ihe ahụ na-abawanye, nke nwere ike ịmịnye nrụgide mpụga nke ọma ma zere mgbawa.
Na-achịkwa ọnụ ọgụgụ mmeghachi omume hydration ciment: N'ime ihe ndị dabeere na ciment, ọsọ ọsọ nke mmeghachi omume hydration na-emetụta arụmọrụ nke ihe. Ọ bụrụ na mmeghachi omume hydration dị ngwa ngwa, nrụgide dị n'ime ihe ahụ enweghị ike ịhapụ ya n'oge, na-akpata mgbawa. HPMC nwere ike n'ụzọ kwesịrị ekwesị na-ebelata ọnụego nke hydration mmeghachi omume site na mmiri na-ejigide ya na nchebe film guzobe, gbochie simenti na-efunahụ mmiri ngwa ngwa na mmalite ogbo, ma si otú zere onu na mberede shrinkage na cracking n'oge siri ike nke ihe onwunwe.
Melite arụmọrụ ihe owuwu: HPMC nwere ike imeziwanye arụmọrụ ihe owuwu ụlọ, nke na-egosipụtakarị na mmiri mmiri ya dị mma, njide mmiri na mmanu mmanu, na-abawanye otu ihe, ma belata mgbawa nke ihe nrụpụta na-ezighi ezi. Ọ nwere ike ime ka ngwa agha, putty ntụ ntụ, wdg mfe gbasaa na larịị n'oge ewu, belata efu ruru nke ihe, melite mkpokọta njupụta na ike nke ihe, na ibelata ihe ize ndụ nke obodo cracking mere site na-erughị eru ewu.
3. Ngwa nke HPMC na ihe eji ewu ụlọ
Ihe nrapado tile: HPMC nwere ike imeziwanye arụmọrụ mgbochi-slip nke nrapado taịlị, hụ na enwere ike itinye taịlị n'otu n'otu na mkpụrụ n'oge echichi, wee belata mwụfu ma ọ bụ mgbawa nke nrụgide na-enweghị isi ma ọ bụ mbelata na-akpata. Na mgbakwunye, mmetụta mwepu na njigide mmiri nke HPMC na-emekwa ka nrapado tile nọgide na-enwe ogologo oge oghe ka emechara, melite arụmọrụ ihe owuwu, ma belata mgbawa nke ọgwụgwọ na-enweghị isi kpatara.
Putty ntụ ntụ: Na ntụ ntụ ntụ, ihe na-ejide mmiri nke HPMC nwere ike igbochi putty ka ọ ghara ịlafu mmiri ngwa ngwa n'oge usoro ihicha, ma belata nkwụsịtụ na mgbawa nke mmiri na-efunahụ. N'otu oge ahụ, ndim mmetụta nke HPMC nwere ike melite-ewu arụmọrụ nke putty, na-eme ka ọ dị mfe itinye evenly na mgbidi, na mbenata elu cracks kpatara na-ezighị ezi ngwa.
Mortar: Ịtinye HPMC na ngwa agha nwere ike imeziwanye arụmọrụ ya nke ọma, mee ka ngwa agha ahụ dịkwuo nro n'oge a na-arụ ya, belata nkewa na stratification, ma si otú ahụ kwalite ịdị n'otu na nrapado nke ngwa agha ahụ. N'otu oge ahụ, mmetụta njide mmiri nke HPMC nwere ike ime ka mmiri na-agbapụta nwayọọ nwayọọ n'oge usoro siri ike nke ngwa agha ahụ, na-ezere mbelata na mgbawa nke mmiri mbụ kpatara.
4. Akpachara anya maka ojiji nke HPMC
Njikwa usoro onunu ogwu: Ọnụ ego nke HPMC agbakwunyere nwere mmetụta kpọmkwem na mmetụta ya, ọ na-adịkarị mkpa ka a gbanwee ya dabere na nha ihe yana ọnọdụ ngwa ngwa. Oke HPMC ga-eme ka ihe ahụ nwee oke nkwekọ, na-emetụta arụmọrụ ụlọ; ebe HPMC ezughị ezu agaghị enwe ike ịrụ ọrụ nke njide mmiri na ịgbatị ka ọ kwesịrị.
Jiri ya na mgbakwunye ndị ọzọ: A na-ejikarị HPMC na mgbakwunye kemịkalụ ndị ọzọ (dị ka ndị na-ebelata mmiri, ihe ndị na-eme ka ikuku, plasticizers, wdg) iji nweta nsonaazụ ka mma. Mgbe ị na-eji ya eme ihe, ọ dị mkpa ịtụle mmekọrịta nke ihe mgbakwunye dị iche iche iji zere mmetụta na-arụ ọrụ nke ihe ndị ahụ.
Dị ka ihe mgbakwunye ụlọ dị mkpa, HPMC nwere mmetụta dị ukwuu n'ibelata mbelata na mgbawa nke ihe owuwu ụlọ. Ọ na-ebelata mgbawa nke ọma site na mfu mmiri na nrụgide nrụgide site n'ịkwalite njide mmiri, ịgbatị, mgbanwe nke ihe na imeziwanye mmeghachi omume hydration ciment. Ezi uche ojiji nke HPMC nwere ike ọ bụghị naanị melite ewu arụmọrụ nke ihe onwunwe, ma ịgbatị ndụ ọrụ nke ụlọ Ọdịdị na ibelata na-eri nke mgbe e mesịrị mmezi. Site na ọganihu na-aga n'ihu nke nkà na ụzụ ihe owuwu ụlọ, ntinye nke HPMC n'ọhịa ihe owuwu ga-adịwanye ukwuu ma dị omimi.
Oge nzipu: Sep-21-2024