HPMC (hydroxypropyl methylcellulose) yog ib qho tseem ceeb hauv kev tsim kho thiab siv dav hauv cov tshuaj mortar uas nws tus kheej leveling. Cov tshuaj mortar uas nws tus kheej leveling yog ib yam khoom uas muaj fluidity siab thiab muaj peev xwm leveling nws tus kheej, uas feem ntau siv rau hauv kev tsim kho pem teb kom ua rau lub ntsej muag du thiab tiaj tus. Hauv daim ntawv thov no, lub luag haujlwm ntawm HPMC feem ntau yog pom tseeb hauv kev txhim kho qhov fluidity, dej khaws cia, adhesion thiab kev ua haujlwm ntawm cov tshuaj mortar.
1. Cov yam ntxwv thiab cov txheej txheem ntawm kev ua haujlwm ntawm HPMC
HPMC yog cov cellulose ether uas tsis yog ionic nrog cov hydroxyl thiab methoxy pawg hauv nws cov qauv molecular, uas yog tsim los ntawm kev hloov qee cov hydrogen atoms hauv cellulose molecules. Nws cov yam ntxwv tseem ceeb suav nrog kev yaj dej zoo, thickening, dej khaws cia, lubricity thiab qee qhov kev sib txuas, uas ua rau nws siv dav hauv cov ntaub ntawv tsim kho.
Hauv cov tshuaj khib nyiab uas nws tus kheej ua kom sib npaug, cov teebmeem tseem ceeb ntawm HPMC suav nrog:
Cov nyhuv ua kom tuab: HPMC ua rau cov tshuaj mortar uas nws tus kheej leveling viscosity nce ntxiv los ntawm kev sib cuam tshuam nrog cov dej molecules los tsim cov tshuaj colloidal. Qhov no pab tiv thaiv kev sib cais ntawm cov tshuaj mortar thaum lub sijhawm tsim kho thiab ua kom cov khoom sib xws.
Kev khaws dej: HPMC muaj kev ua tau zoo heev ntawm kev khaws dej, uas tuaj yeem txo qhov dej poob thaum lub sijhawm ua kom tawv ntawm cov mortar thiab ntev lub sijhawm ua haujlwm ntawm cov mortar. Qhov no tseem ceeb heev rau cov mortar uas nws tus kheej leveling, vim tias qhov dej poob sai dhau yuav ua rau qhov chaw tawg lossis tsis sib npaug ntawm cov mortar.
Kev tswj cov dej ntws: HPMC kuj tseem tuaj yeem tswj tau qhov dej ntws zoo thiab muaj peev xwm tswj tau tus kheej los ntawm kev tswj hwm qhov rheology ntawm cov mortar kom zoo. Qhov kev tswj hwm no tuaj yeem tiv thaiv cov mortar kom tsis txhob muaj qhov dej ntws siab dhau lossis qis dhau thaum lub sijhawm tsim kho, kom ntseeg tau tias cov txheej txheem tsim kho tau zoo.
Kev ua tau zoo ntawm kev sib txuas: HPMC tuaj yeem ua rau lub zog sib txuas ntawm cov tshuaj mortar thiab lub hauv paus nto, txhim kho nws cov kev ua tau zoo ntawm kev sib txuas, thiab zam kev hollowing, tawg thiab lwm yam teeb meem tom qab kev tsim kho.
2. Daim ntawv thov tshwj xeeb ntawm HPMC hauv cov tshuaj khib nyiab tus kheej
2.1 Txhim kho kev ua haujlwm ntawm kev tsim kho
Cov tshuaj mortar uas nws tus kheej leveling feem ntau yuav tsum tau siv sijhawm ntev thaum lub sijhawm tsim kho kom ntseeg tau tias muaj dej txaus thiab lub sijhawm leveling. Qhov khaws dej ntawm HPMC tuaj yeem ncua lub sijhawm teeb tsa ntawm cov tshuaj mortar, yog li ua kom yooj yim dua ntawm kev tsim kho. Tshwj xeeb tshaj yog nyob rau hauv kev tsim kho pem teb loj, cov neeg ua haujlwm tsim kho tuaj yeem muaj sijhawm ntau dua los kho thiab leveling.
2.2 Txhim kho kev ua haujlwm ntawm cov mortar
Qhov ua kom tuab ntawm HPMC tsis yog tsuas yog tiv thaiv kev sib cais ntawm cov mortar xwb, tab sis kuj ua kom muaj kev faib tawm ntawm cov khoom sib xyaw thiab cov cement hauv cov mortar, yog li txhim kho kev ua tau zoo ntawm cov mortar. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txo qhov tsim ntawm cov npuas dej ntawm qhov chaw ntawm cov mortar uas nws tus kheej thiab txhim kho qhov tiav ntawm cov mortar.
2.3 Txhim kho qhov tsis kam tawg
Thaum lub sijhawm ua kom cov mortar uas nws tus kheej ua kom tawv, qhov dej uas ua kom qhuav sai sai yuav ua rau nws cov ntim me me, ua rau muaj kab nrib pleb. HPMC tuaj yeem ua rau qeeb qeeb ntawm cov mortar kom qhuav thiab txo qhov tshwm sim ntawm cov kab nrib pleb me me los ntawm kev khaws cov dej noo. Tib lub sijhawm, nws qhov yooj ywm thiab kev nplaum kuj pab txhim kho qhov tsis kam ntawm cov mortar.
3. Cov nyhuv ntawm HPMC koob tshuaj rau kev ua haujlwm ntawm cov mortar
Hauv cov tshuaj mortar uas nws tus kheej leveling, qhov ntau ntawm HPMC ntxiv yuav tsum tau tswj hwm nruj me ntsis. Feem ntau, qhov ntau ntawm HPMC ntxiv yog nruab nrab ntawm 0.1% thiab 0.5%. Ib qho ntau ntawm HPMC tsim nyog tuaj yeem txhim kho qhov fluidity thiab dej khaws cia ntawm cov tshuaj mortar, tab sis yog tias cov tshuaj ntau dhau, nws yuav ua rau muaj teeb meem hauv qab no:
Kev ua kua qis dhau: HPMC ntau dhau yuav txo qhov ua kua ntawm cov mortar, cuam tshuam rau kev ua haujlwm ntawm kev tsim kho, thiab txawm tias ua rau tsis muaj peev xwm ua kom nws tus kheej.
Lub sijhawm teeb tsa ntev dua: HPMC ntau dhau yuav ncua lub sijhawm teeb tsa ntawm cov mortar thiab cuam tshuam rau kev nce qib tom ntej.
Yog li ntawd, hauv kev siv tswv yim, nws yog qhov tsim nyog los kho qhov ntau npaum li cas ntawm HPMC raws li cov mis ntawm cov tshuaj mortar tus kheej, qhov kub thiab txias thiab lwm yam kom ntseeg tau tias kev ua haujlwm zoo tshaj plaws.
4. Cov kev cuam tshuam ntawm ntau hom HPMC sib txawv rau kev ua haujlwm ntawm cov mortar
HPMC muaj ntau yam kev qhia tshwj xeeb. Cov HPMC sib txawv yuav muaj cov teebmeem sib txawv rau kev ua haujlwm ntawm cov tshuaj mortar uas nws tus kheej tau teeb tsa vim lawv qhov hnyav molecular thiab qib hloov pauv sib txawv. Feem ntau, HPMC nrog qib hloov pauv siab thiab qhov hnyav molecular siab muaj cov teebmeem thickening thiab dej khaws cia zoo dua, tab sis nws qhov kev yaj qeeb. HPMC nrog qib hloov pauv qis thiab qhov hnyav molecular qis yaj sai dua thiab haum rau cov xwm txheej uas xav tau kev yaj sai thiab lub sijhawm luv luv coagulation. Yog li ntawd, thaum xaiv HPMC, nws yog qhov tsim nyog los xaiv cov hom tsim nyog raws li cov kev xav tau tshwj xeeb ntawm kev tsim kho.
5. Kev cuam tshuam ntawm cov yam ntxwv ib puag ncig rau kev ua tau zoo ntawm HPMC
Qhov ua rau HPMC khaws dej thiab tuab yuav raug cuam tshuam los ntawm qhov chaw tsim kho. Piv txwv li, nyob rau hauv qhov kub siab lossis qis av noo ib puag ncig, dej ua pa sai sai, thiab qhov ua rau HPMC khaws dej tseem ceeb heev; nyob rau hauv qhov chaw noo noo, qhov ntau ntawm HPMC yuav tsum tau txo kom tsim nyog kom tsis txhob muaj cov mortar teeb tsa qeeb dhau. Yog li ntawd, nyob rau hauv cov txheej txheem tsim kho tiag tiag, qhov ntau thiab hom HPMC yuav tsum tau kho raws li qhov xwm txheej ib puag ncig kom ntseeg tau tias qhov ruaj khov ntawm cov mortar tus kheej.
Ua ib qho khoom siv tseem ceeb hauv cov tshuaj pleev xim rau tus kheej, HPMC txhim kho kev ua haujlwm ntawm kev tsim kho thiab qhov kawg ntawm cov tshuaj pleev xim los ntawm nws cov tuab, khaws dej, kho qhov fluidity thiab txhim kho kev nplaum. Txawm li cas los xij, hauv kev siv tiag tiag, cov yam xws li qhov ntau, ntau yam thiab ib puag ncig kev tsim kho ntawm HPMC yuav tsum tau txiav txim siab kom tau txais qhov zoo tshaj plaws ntawm kev tsim kho. Nrog rau kev nce qib tas mus li ntawm thev naus laus zis, kev siv HPMC hauv cov tshuaj pleev xim rau tus kheej yuav dhau los ua ntau dua thiab paub tab.
Lub sijhawm tshaj tawm: Cuaj hlis-24-2024