Hydroxypropyl Methyl Cellulose (HPMC)bụ cellulose ether a na-ejikarị mmiri eme ihe, bụ nke a na-ejikarị eme ihe na ihe owuwu ụlọ, mkpuchi, ọgwụ na nri. N'ime ihe eji arụ ọrụ simenti, HPMC, dị ka onye na-agbanwe agbanwe, a na-etinyekarị ya na ngwa ngwa ciment iji meziwanye arụmọrụ ya, ọkachasị n'usoro iwu na iji ya. Ọ nwere mmetụta dị ịrịba ama na mmiri mmiri, njide mmiri, ịrụ ọrụ na nkwụsị mgbawa nke ngwa agha ahụ.

 

1. Mmetụta nke HPMC na fluidity nke ciment ngwa agha
Mmiri mmiri nke ciment ciment bụ ihe dị mkpa na-egosi iji tụọ arụmọrụ owuwu ya, nke na-emetụta arụmọrụ na ịdị mma ya kpọmkwem. Dị ka ihe polymer, HPMC nwere ezigbo mmiri solubility na elu ọrụ. Mgbe etinyechara ya na ngwa ngwa ciment, ọ nwere ike ịmepụta ihe nkiri dị mkpa site na mmekọrịta nke intermolecular, mee ka viscosity nke ngwa agha dịkwuo elu, ma si otú a na-eme ka mmiri na-arụ ọrụ nke ngwa agha ahụ dịkwuo mma. Kpọmkwem, HPMC nwere ike ịhazigharị nkwekọ nke ngwa agha ahụ nke ọma, na-eme ka ọ dị mfe itinye na nkesa nke ọma n'oge usoro ihe owuwu, na-ezere ihe isi ike ihe owuwu nke ihicha ngwa ngwa na-akpata.

HPMC nwekwara ike ịgbatị oge oghere nke ngwa agha, ya bụ, ịbawanye oge eji ngwa ngwa eme ihe n'oge a na-ewu ụlọ, ma zere mmetụta ihe owuwu na-emetụta oke evaporation nke mmiri, karịsịa na okpomọkụ dị elu na ebe akọrọ.

 

2. Mmetụta nke HPMC na njide mmiri nke ciment mortar
Njide mmiri nke ụrọ ciment dị oké mkpa maka ikesi ike na ike mmepe ya. Ebe ọ bụ na usoro hydration cement na-achọ mmiri zuru oke, ọ bụrụ na mmiri na-efunahụ ngwa ngwa dị ngwa ngwa na hydration ciment ezughị ezu, ọ ga-emetụta kpọmkwem ike ikpeazụ na ịdịte aka nke ngwa agha ahụ. HPMC nwere ike melite njigide mmiri nke ngwa agha nke ọma. Otu hydroxypropyl na methyl dị n'ime ihe owuwu molekụla ya nwere hydrophilicity siri ike, nke nwere ike ịmepụta akwa njigide mmiri n'otu n'ime ngwa ngwa ma belata ọnụego ikuku mmiri.

Karịsịa na elu okpomọkụ na ala iru mmiri gburugburu, mgbakwunye na nke HPMC nwere ike budata igbu oge ihicha usoro nke ciment ngwa agha, hụ na zuru hydration nke ciment, ma si otú mma ikpeazụ ike na mgbape eguzogide nke ngwa agha. Nnyocha egosiwo na ike mkpakọ na ịdịte aka nke ngwa agha nwere ego kwesịrị ekwesị nke HPMC agbakwunyere na-adịkarị mma karịa ndị na-enweghị HPMC na usoro ike siri ike ogologo oge.

 

3. Mmetụta nke HPMC na mgbape mgbochi nke ciment ngwa agha
Mgbawa bụ nsogbu a na-ahụkarị nke na-emetụta ogo ngwa ngwa ciment, ọkachasị n'okpuru mmetụta nke ihe ndị dị ka nkụchi nkụ, mgbanwe okpomọkụ, na ike mpụga, ngwa agha na-adịkarị mfe mgbawa. Mgbakwunye nke HPMC nwere ike melite nguzogide mgbape nke ngwa agha, tumadi site na akụkụ ndị a:

Melite ngbanwe na plasticity nke ngwa agha: HPMC nwere ụfọdụ elasticity na plasticity, nke nwere ike ibelata nchekasị nke nkụchi ihicha na-akpata n'oge usoro ọgwụgwọ nke ngwa agha, si otú ahụ na-ebelata ihe mgbagwoju anya.
Na-abawanye ike nchikota na ike nke ngwa agha: HPMC nwere ike ime ka adhesion na ike ike nke ngwa agha dịkwuo elu, karịsịa ma ọ bụrụ na elu nke mkpụrụ osisi na-adịghị mma ma ọ bụ nrapado mkpụrụ adịghị mma.
Jikwaa ọnụ ọgụgụ hydration ciment: Site n'ịchịkwa ọnụ ahịa hydration ciment, HPMC nwere ike igbu oge mfu mmiri dị ukwuu na ngwa ngwa ciment wee belata nrụgide shrinkage nke ikuku na-ekupụ mmiri na-akpata ngwa ngwa, wee si otú a na-egbochi ihe mgbawa nke ọma.

 

4. Mmetụta nke HPMC na ike na ogologo oge nke ciment mortar
Mgbe ị na-emewanye arụmọrụ na mgbape mgbape nke ngwa ngwa ciment, HPMC nwekwara mmetụta ụfọdụ na ike ya na ịdịte aka ya. Ọ bụ ezie na mgbakwunye na nke HPMC ga-ubé belata mmalite ike nke ngwa agha n'ihi na molekụla Ọdịdị ya nwere akụkụ nke mmiri a chọrọ maka ciment hydration, n'ikpeazụ, HPMC na-enyere aka zuru ezu hydration nke ciment, si otú ahụ na-emeziwanye ike ikpeazụ nke ngwa agha.

Tụkwasị na nke a, HPMC nwere ike imeziwanye nkwụsị nke ngwa ngwa ciment, belata mbuze nke ngwa agha site na mmiri ma ọ bụ kemịkalụ, ma welie ogologo oge ya. Nke a na-eme ka ngwa agha na HPMC agbakwunyere nwere arụmọrụ ogologo oge ka mma na gburugburu mmiri ma ọ bụ ihe na-emebi emebi, ọkachasị dabara maka mma mgbidi mputa, ihe mgbochi ala na ubi ndị ọzọ.

 

5. Atụmanya ngwa nke HPMC n'ime ihe ụlọ dabeere na ciment
Na-eto eto na-achọsi ike elu-arụmọrụ ngwa agha na-ewu ụlọ ọrụ, HPMC, dị ka ihe dị mkpa mgbakwunye, egosila sara mbara ngwa atụmanya na ciment dabeere ihe owuwu. Na mgbakwunye na ngwa ọdịnala dị ka plasta mgbidi na ngwa agha ala, HPMC nwekwara ike iji na-emepụta ngwa agha na-edozi onwe ya, ngwa nrụzi, ngwa ngwa agwakọta akọrọ na ngwaahịa ndị ọzọ iji meziwanye arụmọrụ ngwa agha zuru oke.

Na mmelite nke chọrọ maka iwulite gburugburu ebe nchekwa na nkwado, ala mmetọ na ala VOC (na-agbanwe organic compound) àgwà nke HPMC na-emekwa ka ọ nwere nnukwu ikike maka ngwa na akwụkwọ ndụ akwụkwọ ndụ ihe ụlọ. N'otu oge ahụ, na mmepe na-aga n'ihu nke teknụzụ ndị metụtara ya, mgbanwe na ụdị ngwa ngwa nke HPMC ga-adịwanye iche, na-enye ohere maka ịmepụta ihe ọhụrụ na mmepe nke ciment dabeere na ihe owuwu ụlọ.

 

Dị ka ihe dị mkpa simenti motar modifier, hydroxypropyl methylcellulose (HPMC) na-eme ka arụ ọrụ ụlọ na-arụ ọrụ nke ọma ma na-eji arụ ọrụ nke ihe eji arụ ọrụ simenti eme ihe site na imeziwanye mmiri mmiri, njigide mmiri, nkwụsị mgbawa na ike nke ngwa agha. Site na mmụba na-aga n'ihu nke ihe ihe ụlọ chọrọ, a ga-agbasawanye ngwa ngwa nke HPMC, bụrụ otu n'ime isi ihe na-akwalite mmepe nke ngwa ụlọ ọgbara ọhụrụ.