Sab nrauv Insulation and Finishing Systems (EIFS) mortars ua lub luag haujlwm tseem ceeb hauv kev muab rwb thaiv tsev, huab cua tiv thaiv thiab zoo nkauj rau cov tsev. Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom siv feem ntau siv hauv EIFS mortars vim nws muaj ntau yam, dej tuav thiab muaj peev xwm txhim kho kev ua haujlwm.
1. Taw qhia rau EIFS mortar:
EIFS mortar yog cov khoom siv sib xyaw siv rau kev rwb thaiv tsev thiab kev ua tiav ntawm cov phab ntsa sab nrauv.
Nws feem ntau muaj cov cement binder, aggregates, fibers, additives thiab dej.
EIFS mortar tuaj yeem siv los ua primer rau kev sib koom ua ke ntawm cov rwb thaiv tsev thiab ua lub tsho sab saum toj los txhim kho kev zoo nkauj thiab kev tiv thaiv huab cua.
2.Hydroxypropylmethylcellulose (HPMC):
HPMC yog cellulose ether muab los ntawm ntuj polymer cellulose.
Nws yog dav siv nyob rau hauv lub tsev cov ntaub ntawv rau nws cov dej-retaining, thickening thiab workability-txhim kho zog.
Hauv EIFS mortars, HPMC ua raws li kev hloov kho rheology, txhim kho adhesion, cohesion thiab sag resistance.
3. Formula cov khoom xyaw:
a. Cement-based binder:
Portland Cement: Muab lub zog thiab adhesion.
Blended cement (xws li Portland limestone cement): Ua kom muaj zog thiab txo cov pa roj carbon hneev taw.
b. Aggregation:
Xuab zeb: Lub ntim thiab kev ntxhib los mos ntawm nplua aggregate.
Lub teeb yuag aggregates (xws li nthuav perlite): Txhim kho thermal rwb thaiv tsev.
C. fiber ntau:
Alkali-resistant fiberglass: Txhim kho lub zog tensile thiab tawg tsis kam.
d. Additives:
HPMC: dej tuav, ua haujlwm, thiab sag kuj.
Air-entraining agent: Txhim kho khov-thaw kuj.
Retarder: Tswj kev teeb tsa lub sijhawm hauv huab cua kub.
Polymer Modifiers: Txhim kho qhov yooj yim thiab kav ntev.
e. Dej: Qhov tseem ceeb rau hydration thiab workability.
4. Yam ntxwv ntawm HPMC hauv EIFS mortar:
a. Kev tuav dej: HPMC nqus thiab khaws cov dej, ua kom cov dej mus ntev thiab txhim kho kev ua haujlwm.
b. Kev ua haujlwm tau zoo: HPMC muab cov mortar smoothness thiab sib xws, ua kom yooj yim rau kev tsim kho.
C. Anti-sag: HPMC pab tiv thaiv mortar los ntawm sagging los yog slumping ntawm ntsug nto, kom ntseeg tau cov tuab tuab.
d. Adhesion: HPMC txhim kho qhov adhesion ntawm mortar thiab substrate, txhawb nqa lub sij hawm ntev adhesion thiab durability.
e. Kev tiv thaiv kev sib tsoo: HPMC txhim kho qhov yooj yim thiab kev sib khi lub zog ntawm cov tshuaj khib thiab txo qhov kev pheej hmoo ntawm kev tawg.
5. Kev sib xyaw ua ke:
a. Txoj kev ua ntej ntub dej:
Ua ntej ntub cov HPMC hauv lub thawv huv nrog kwv yees li 70-80% ntawm tag nrho cov dej sib xyaw.
Ua tib zoo sib tov cov khoom xyaw qhuav (cement, aggregate, fibers) hauv ib lub tov khoom.
Maj mam ntxiv cov tshuaj HPMC premoistened thaum nplawm kom txog thaum lub siab xav tau mus txog.
Kho cov ntsiab lus dej raws li xav tau kom ua tiav qhov xav tau ua haujlwm.
b. Dry mixing method:
Qhuav HPMC nrog cov khoom xyaw qhuav (cement, aggregates, fibers) nyob rau hauv ib lub tov khoom.
Maj mam ntxiv dej thaum stirring kom txog thaum xav tau sib xws.
Sib tov kom huv si kom paub meej tias txawm tias faib HPMC thiab lwm yam khoom xyaw.
C. Compatibility Testing: Kev ntsuam xyuas kev sib raug zoo nrog HPMC thiab lwm yam khoom ntxiv kom paub meej tias kev sib raug zoo thiab kev ua tau zoo.
6. Kev siv technology:
a. Kev npaj substrate: xyuas kom lub substrate huv si, qhuav thiab tsis muaj kab mob.
b. Daim ntawv thov primer:
Siv EIFS Mortar Primer rau lub substrate siv cov trowel lossis cov khoom siv tshuaj tsuag.
Xyuas kom tseeb tias lub thickness yog txawm thiab cov kev pab them nqi yog zoo, tshwj xeeb tshaj yog nyob ib ncig ntawm cov npoo thiab cov ces kaum.
Muab lub rwb thaiv tsev rau hauv cov khib nyiab ntub thiab cia sijhawm txaus los kho.
C. Topcoat Application:
Siv cov EIFS mortar topcoat hla cov primer kho siv cov trowel los yog cov khoom siv tshuaj tsuag.
Kev ntxhib los mos los yog tiav qhov chaw raws li qhov xav tau, saib xyuas kom ua tiav qhov sib xws thiab zoo nkauj.
Kho lub topcoat raws li cov chaw tsim khoom cov lus pom zoo los tiv thaiv nws ntawm huab cua hnyav.
7. Kev tswj xyuas zoo thiab kev sim:
a. Consistency: Saib xyuas qhov sib xws ntawm cov mortar thoob plaws hauv kev sib xyaw thiab kev siv cov txheej txheem los xyuas kom meej qhov sib xws.
b. Adhesion: Kev ntsuam xyuas adhesion yog ua los ntsuas lub zog ntawm cov tshuaj khib thiab cov substrate.
C. Kev ua haujlwm tau zoo: Ntsuas kev ua haujlwm tau zoo los ntawm kev ntsuas kev poob qis thiab kev soj ntsuam thaum lub sijhawm tsim kho.
d. Durability: Ua qhov ntsuas qhov ntev, suav nrog cov voj voog khov-thaw thiab dej tsis zoo, txhawm rau ntsuas kev ua haujlwm ntev.
Siv HPMC los tsim EIFS mortars muaj ntau qhov zoo ntawm kev ua haujlwm, adhesion, sag resistance thiab durability. Los ntawm kev nkag siab txog cov khoom ntawm HPMC thiab ua raws li kev sib xyaw ua ke thiab kev siv cov tswv yim, cov neeg cog lus tuaj yeem ua tiav EIFS cov kev teeb tsa zoo uas ua tau raws li cov qauv kev ua tau zoo thiab ua kom lub tsev zoo nkauj thiab ua haujlwm ntev.
Post lub sij hawm: Feb-23-2024