Hydroxypropyl methylcellulose (HPMC)yog ib qho uas tsis yog-ionic cellulose ether dav siv hauv cov khoom siv, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov khoom siv cement. Nws lub luag haujlwm tseem ceeb suav nrog kev txhim kho cov dej khaws cia, thickening thiab kev tsim kho cov khoom ntawm cov khoom thiab txhim kho cov khoom siv ntawm cov khoom siv.
1. Kev txhim kho cov dej tuav tau zoo
HPMC muaj cov khoom tuav dej zoo heev. Nyob rau hauv cov ntaub ntawv cement-based, kev poob dej ntxov ntxov tuaj yeem cuam tshuam cov tshuaj tiv thaiv dej ntawm cov cement, ua rau lub zog tsis txaus, tawg, thiab lwm yam teeb meem zoo. HPMC tuaj yeem tiv thaiv cov tawm ntawm cov dej noo los ntawm kev sib sau ua yeeb yaj kiab polymer polymer lub sijhawm. Qhov kev tuav dej no yog qhov tseem ceeb tshwj xeeb hauv qhov kub thiab txias ib puag ncig, thiab tuaj yeem txhim kho kev tsim kho thiab tu kom zoo ntawm mortar, pob zeb thiab lwm yam khoom siv.
2. Txhim kho constructability thiab workability
HPMC yog ib qho thickener zoo. Ntxiv ib qho me me ntawm HPMC rau cov ntaub ntawv cement-based tuaj yeem ua kom cov viscosity ntawm cov khoom muaj zog. Thickening pab tiv thaiv cov slurry los ntawm delaminating, sagging los yog los ntshav thaum lub sij hawm thov, thaum tseem ua rau cov ntaub ntawv yooj yim mus kis thiab theem. Tsis tas li ntawd, HPMC muab cov khoom muaj zog adhesion, txhim kho cov adhesion ntawm cov mortar ntawm cov khoom siv hauv paus, thiab txo cov khoom pov tseg thaum lub sij hawm tsim kho thiab ua haujlwm kho tom ntej.
3. Txhim khu kev tiv thaiv tawg
Cov ntaub ntawv cement-based yog qhov ua rau tawg vim dej evaporation thiab ntim shrinkage thaum lub sij hawm hardening txheej txheem. Cov dej tuav cov khoom ntawm HPMC tuaj yeem txuas ntxiv cov theem yas ntawm cov khoom siv thiab txo qhov kev pheej hmoo ntawm kev tawg tawg. Tsis tas li ntawd, HPMC muaj txiaj ntsig zoo cuam tshuam nrog kev ntxhov siab los ntawm kev ua kom lub zog sib txuas thiab hloov tau yooj yim ntawm cov khoom, ntxiv txo qhov tshwm sim ntawm cov kab nrib pleb. Qhov no yog tshwj xeeb tshaj yog ib qho tseem ceeb rau nyias-txheej mortars thiab self-leveling pem teb cov ntaub ntawv.
4. Txhim kho durability thiab khov-thaw kuj
HPMCtuaj yeem txhim kho qhov ntom ntawm cov ntaub ntawv cement-based thiab txo cov porosity, yog li txhim kho cov khoom impermeability thiab tshuaj corrosion kuj. Hauv qhov chaw txias, qhov khov-thaw tsis kam ntawm cov ntaub ntawv ncaj qha cuam tshuam rau lawv lub neej kev pabcuam. HPMC txo qis qhov kev puas tsuaj ntawm cov ntaub ntawv cement-based thaum lub sij hawm khov-thaw thiab txhim kho lawv cov kav dej los ntawm kev tuav dej thiab txhim kho kev sib raug zoo.
5. Txhim kho cov khoom siv kho tshuab
Txawm hais tias lub luag haujlwm tseem ceeb ntawm HPMC tsis yog txhawm rau nce lub zog ncaj qha, nws ncaj qha txhim kho cov khoom siv ntawm cov khoom siv cement. Los ntawm kev ua kom dej tuav thiab ua haujlwm tau zoo, HPMC hydrates cov cement ntau dua thiab tsim cov khoom lag luam hydration denser, yog li txhim kho cov khoom siv lub zog compressive thiab flexural zog. Tsis tas li ntawd, kev ua haujlwm zoo thiab kev sib txuas ntawm cov khoom sib txuas pab txo qis kev tsim kho, yog li tag nrho kev txhim kho kev ua haujlwm ntawm cov khoom siv.
6. Daim ntawv thov piv txwv
HPMC yog dav siv nyob rau hauv masonry mortar, plastering mortar, self-leveling mortar, pobzeb nplaum thiab lwm yam khoom nyob rau hauv kev tsim kho tej yaam num. Piv txwv li, ntxiv HPMC rau cov nplais pobzeb nplaum tuaj yeem txhim kho lub zog sib txuas thiab kev tsim kho lub sijhawm qhib; Ntxiv HPMC rau plastering mortar tuaj yeem txo cov ntshav thiab sagging, thiab txhim kho cov nyhuv plastering thiab tawg tsis kam.
Hydroxypropyl methylcellulose yog sivtuaj yeem txhim kho kev ua haujlwm ntawm cov khoom siv cement hauv ntau yam. Nws cov dej tuav, thickening, tawg tsis kam thiab durability zog tau zoo txhim kho kev tsim kho thiab kev ua tau zoo ntawm cov khoom siv cement. Qhov no tsis tsuas yog pab txhim kho qhov project zoo, tab sis kuj txo cov nqi tsim kho thiab tu. Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho cov cuab yeej siv hauv tsev, daim ntawv thov kev cia siab ntawm HPMC yuav dav dua.
Post lub sij hawm: Nov-21-2024