HPMC (hydroxypropyl methylcellulose) bụ ihe mgbakwunye polymer multifunctional nke a na-ejikarị eme ihe na ihe owuwu ụlọ, karịsịa na ihe ndị sitere na ciment. Iwebata HPMC nwere ike imeziwanye arụmọrụ nke ihe ndị sitere na ciment, gụnyere ịkwalite nguzogide mgbape, melite arụmọrụ na ịchịkwa usoro hydration, si otú ahụ na-ebelata ihe omume nke ịgbawa nke ọma.
Chemical na anụ ahụ nke HPMC
HPMC bụ polymer synthetic nke ejiri kemịkalụ gbanwetụrụ site na cellulose. Ọdịdị ya molekụla gụnyere methyl na hydroxypropyl substituents, na-enye ya pụrụ iche solubility, ndim, mmiri njigide na-emepụta ihe nkiri. Isi njirimara ya gụnyere:
Mmiri dị elu: HPMC nwere ikike njigide mmiri dị mma ma nwee ike ịmepụta ihe nkiri na-ejide mmiri n'ime ihe iji mee ka mmiri na-ekpo ọkụ kwụsịlata.
Mmetụta siri ike: HPMC nwere ike ịbawanye viscosity nke slurry nke ukwuu, si otú a na-emeziwanye arụmọrụ ya.
Ihe na-emepụta ihe nkiri: Ikike imepụta ihe nkiri ya dị mma nwere ike ịmepụta ihe nkiri na-agbanwe agbanwe n'elu ihe ahụ, na-enye nchebe anụ ahụ ọzọ.
Usoro mmetụta nke HPMC na mgbawa nke ihe ndị dabeere na ciment
1. Njide mmiri na mbelata akọrọ shrinkage cracks
Ihe simenti dị iche iche na-enweta mbelata volumetric dị ukwuu n'oge a na-esi ike, nke bụ isi n'ihi mfu mmiri na ihicha nkụ n'ihi mmeghachi omume hydration. A na-ebutekarị mgbawa ịsa nkụ n'ike n'ike n'ike n'ike n'ike n'ike n'ime mmiri simenti n'oge a na-eme ka ike sie ike, na-ebute mbelata olu na-ekwekọghị ekwekọ, si otú ahụ na-akpata mgbawa. Ngwongwo na-ejigide mmiri nke HPMC na-ekere òkè dị mkpa na nke a:
Na-ebelata evaporation mmiri: HPMC na-ejigide mmiri na ciment slurry, si otú a na-ebelata ọnụego nke evaporation mmiri. Mmetụta njide mmiri a abụghị naanị na-enyere aka ịgbatị oge mmeghachi omume hydration, kamakwa ọ na-ebelata ihicha ihicha nke ikuku mmiri na-akpata.
Mmeghachi omume hydration n'ụdị: Ebe ọ bụ na HPMC na-enye gburugburu mmiri kwụsiri ike, irighiri ciment nwere ike nweta mmeghachi omume hydration ka mma na nke zuru oke, na-ebelata esemokwu dị n'ime ma belata ihe egwu nke mgbawa nke nkụchi akọrọ na-akpata.
2. Meziwanye viscosity na nkesa otu ihe
HPMC nwere mmetụta na-akpụ akpụ, nke na-arụ ọrụ dị mkpa n'ịkwalite arụmọrụ na ịdị n'otu nke ihe ndị dabeere na ciment:
Viscosity na-abawanye: HPMC na-abawanye viscosity nke slurry, na-eme ka arụ ọrụ rụọ ọrụ n'oge ngwa, na-ekwe ka slurry na-asọ nke ọma ma jupụta ebu ma ọ bụ cracks, na-ebelata oghere na ebe na-enweghị isi.
Nkesa Uniform: Site n'ịbawanye viscosity nke slurry, HPMC na-eme ka nkesa nke ndị na-ejuputa na eriri na slurry dịkwuo ọbụna, na-eme ka usoro dị n'ime ụlọ dị n'ime ya n'oge usoro ike siri ike ma na-ebelata mgbawa n'ihi nrụgide mgbagwoju anya.
3. Mee ka ihe nkiri na-emepụta ihe nkiri na nchebe elu
Ihe na-emepụta ihe nkiri nke HPMC na-enyere aka ịmepụta oyi akwa mkpuchi n'elu ihe ahụ, nke nwere mmetụta dị mma n'ibelata mgbawa elu:
Nchedo dị n'elu: Igwe ihe nkiri na-agbanwe agbanwe nke HPMC mere n'elu ihe nwere ike ichebe elu site na mpụta site na gburugburu ebe obibi na mmiri mmiri ngwa ngwa, si otú ahụ na-ebelata ihe omume nke mgbawa elu.
Mkpuchi na-agbanwe agbanwe: Igwe ihe nkiri a nwere ogo mgbanwe ụfọdụ ma nwee ike itinye akụkụ nke nrụgide ahụ n'oge obere nrụrụ, si otú a na-egbochi ma ọ bụ na-ebelata mgbasawanye nke cracks.
4. Mezie usoro hydration
HPMC nwere ike ịhazi usoro hydration nke ciment, nke na-arụ ọrụ dị mkpa n'ibelata nchekasị nchekasị kpatara site na hydration na-enweghị isi:
Mmiri mmiri na-ahapụ ngwa ngwa: HPMC nwere ike ibelata mmeghachi omume hydration ngwa ngwa, na-ekwe ka mmiri dị na ciment slurry jiri nwayọọ nwayọọ hapụ ya, si otú ahụ na-enye ebe obibi hydration na-edobe na-adịgide adịgide. Mmetụta a na-ewepụta ngwa ngwa na-ebelata oke nchekasị nke mmeghachi omume hydration na-enweghị isi na-akpata, si otú a na-ebelata ihe ize ndụ nke mgbawa.
Ihe atụ ngwa nke HPMC n'ihe dị iche iche dabere na ciment
A na-eji HPMC eme ihe n'ọtụtụ ebe na ciment, gụnyere ma ọnweghị oke na ala na-edozi onwe ya, mkpuchi mgbidi dị n'èzí, ngwa agha na ihe nrụzi ihe. Ndị a bụ ụfọdụ ọmụmaatụ ngwa:
1. Ihe n'ala na-edozi onwe ya
Ihe na-edozi onwe ya na-achọ ihe dị mma nke mmiri na ihe jikọrọ ya mgbe ị na-ezere mgbawa elu. HPMC na-eme ka ihe na-asọba na njedebe elu nke ihe ahụ dịkwuo mma site n'ịdị na-agbapụta ya na njide mmiri mgbe ọ na-ebelata ihe omume nke mgbawa elu.
2. Agba mgbidi dị n'èzí
Agba dị n'èzí chọrọ ezigbo nrapado na mgbape mgbape. Ihe na-emepụta ihe nkiri na njide mmiri nke HPMC na-eme ka mkpuchi mkpuchi na mgbanwe mgbanwe dịkwuo mma, si otú ahụ na-eme ka mkpuchi mkpuchi mkpuchi na ihu igwe dị elu.
3. Ndozi ihe
Ihe nrụzi ihe na-achọ ike dị elu na ike ngwa ngwa mgbe ị na-ejigide shrinkage dị ala. HPMC na-enye ezigbo njigide mmiri na ikike nchịkwa hydration, na-ekwe ka ihe nrụzi ahụ na-eme ka ọ dị ntakịrị ala akọrọ n'oge usoro siri ike ma belata ihe ize ndụ nke ịgbawa mgbe arụzichara.
Akpachara anya maka iji HPMC
Ọ bụ ezie na HPMC nwere mmetụta dị ukwuu n'ibelata mgbawa nke ihe ndị sitere na ciment, isi ihe ndị a ka dị mkpa ka achọpụta mgbe a na-eji ya:
Njikwa usoro onunu ogwu: Usoro onunu ogwu nke HPMC kwesiri ịdị n'usoro kwekọrọ na usoro achọrọ. Ọtụtụ ma ọ bụ obere ga-emetụta arụmọrụ ihe. N'ikwu okwu n'ozuzu, usoro onunu ogwu dị n'etiti 0.1-0.5%.
Ịgwakọta Uniformity: HPMC kwesịrị ka agwakọta nke ọma na ihe ndị ọzọ iji hụ na ọ na-arụ ọrụ n'oge slurry.
Ọnọdụ ihe owuwu: Ebe a na-ewu ụlọ (dị ka okpomọkụ, iru mmiri) na-enwekwa mmetụta na mmetụta nke HPMC, ma ekwesịrị ịhazi ya nke ọma dịka ọnọdụ ụfọdụ siri dị.
Dị ka ihe mgbakwunye ihe simenti dị irè, HPMC na-arụ ọrụ dị mkpa n'ibelata mgbawa nke ihe ndị sitere na ciment site na njide mmiri pụrụ iche, ịgbanye, imepụta ihe nkiri na njikwa hydration. Ọ na-egbu oge ikuku mmiri, na-eme ka otu ihe dị n'otu, na-echebe ihe ndị dị n'elu, ma na-achịkwa usoro hydration, si otú ahụ na-ebelata ihe ize ndụ nke mgbawa. Ya mere, na ntinye nke ihe ndị dabeere na ciment, iji HPMC eme ihe n'ụzọ ziri ezi nwere ike ọ bụghị nanị imeziwanye arụmọrụ ihe, kamakwa ịgbatị ndụ ọrụ ya ma belata ụgwọ ọrụ.
Oge nzipu: Jun-26-2024