Cellulose ethers (HEC, HPMC, MC, etc.) uye redispersible polymer powders (kazhinji zvichienderana neVAE, acrylates, nezvimwewo)maviri akakosha ekuwedzera mudhaka, kunyanya yakaoma-musanganiswa dhaka. Mumwe nemumwe ane mabasa akasarudzika, uye kuburikidza nehungwaru synergistic mhedzisiro, ivo vanosimudzira zvakanyanya kuita kwese kwedhaka. Kudyidzana kwavo kunonyanya kuratidzwa muzvikamu zvinotevera:
Cellulose ethers inopa nharaunda dzakakosha (kuchengeta mvura uye kukora):
Kuchengeta mvura: Iri ndiro rimwe remabasa akakosha e cellulose ether. Inogona kuumba hydration firimu pakati pematope particles nemvura, zvakanyanya kuderedza chiyero chekubuda kwemvura kune substrate (yakadai seporous zvidhinha uye zvidhinha) uye mhepo.
Mhedzisiro pane inodispersible polymer poda: Uku kuchengetwa kwemvura kwakanakisa kunogadzira mamiriro akakosha ekuti inodhindwazve polymer poda kuti ishande:
Kupa firimu-kuumba nguva: polymer poda zvimedu zvinoda kunyungudutswa mumvura uye kuparadzirwa mu emulsion. Iyo polymer poda inobva yabatana kuita inoenderera, inoshanduka yepolymer firimu sezvo mvura inoputika zvishoma nezvishoma panguva yekuomesa dhaka. Cellulose ether inononotsa kubuda kwemvura, ichipa zvidimbu zvepolymer powder nguva yakakwana (nguva yakazaruka) kuti ipararire zvakaenzana uye iende mumatope ematope uye mainterface, pakupedzisira ichigadzira firimu repamusoro-soro, rakazara repolymer. Kana kurasikirwa kwemvura kuchikurumidza, iyo polima poda haizogadziri zvizere firimu kana kuti firimu ichave isingaenderere mberi, ichideredza zvakanyanya kusimba kwayo.
Kuve nechokwadi chekuti Cement Hydration: Cement hydration inoda mvura.Zvinhu zvekuchengetedza mvuraye cellulose ether iva nechokwadi chekuti nepo polima poda ichigadzira firimu, simende inogamuchirawo mvura yakakwana yekuzara kwemvura, nekudaro kugadzira hwaro hwakanaka hwekutanga uye kunonoka simba. Simba rinogadzirwa nesamende hydration yakasanganiswa nekuchinjika kwepolymer firimu ndiyo hwaro hwekuita kwakavandudzwa.
Cellulose ether inovandudza kushanda (kukora uye kupinza mweya):
Kuomesa/Thixotropy: Cellulose ethers inowedzera kuwirirana uye thixotropy yematope (yakakora kana ichiripo, kutetepa kana yamutswa/kuiswa). Izvi zvinonatsiridza kuramba kwedhaka kuti isag (kutsvedza pasi pakatarisana), zvichiita kuti zvive nyore kupararira uye chiyero, zvichikonzera kupera kuri nani.
Mhepo intraining effect: Cellulose ether ine imwe mhepo inopinza simba, ichiunza tudiki, yunifomu uye yakagadzikana mabhuru.
Kukanganisa papolymer poda:
Yakavandudzwa kupararira: Yakakodzera viscosity inobatsira latex poda zvimedu zvinopararira zvakaenzana mudhaka system panguva yekusanganisa uye inoderedza agglomeration.
Optimized workability: Yakanaka yekuvaka zvivakwa uye thixotropy inoita kuti dhaka rine latex poda rive nyore kubata, kuve nechokwadi kuti rinoshandiswa zvakaenzana kune substrate, iyo yakakosha pakushandisa zvizere kubatanidzwa kwelatex hupfu pane iyo interface.
Kuzora uye kumisa mhedzisiro yemabhuru emhepo: Iwo akaunzwa mabhuru emhepo anoita semabhora ebhora, achiwedzera kunatsiridza lubricity uye kushanda kwedhaka. Panguva imwe chete, aya ma microbubbles anodzivirira kushushikana mukati medhaka rakaomeswa, achizadzisa kuomesera kweiyo latex poda (kunyangwe yakawandisa kupinza kwemhepo kunogona kuderedza simba, saka chiyero chinodiwa).
Redispersible polymer poda inopa inochinjika kubatanidza uye kusimbisa (kuumbwa kwefirimu uye kubatana):
Kuumbwa kwefirimu repolymer: Sezvambotaurwa, panguva yekuomeswa kwedhaka, latex poda zvimedu zvinoungana kuita inoenderera yetatu-dimensional polymer network firimu.
Impact pane matrix edhaka:
Kuwedzera kubatana: Iyo polymer firimu wraps uye mabhiriji esimende hydration zvigadzirwa, unhydrated simende zvimedu, mafirita uye aggregates, zvakanyanya kuwedzera kusimba kwekubatanidza (kubatana) pakati pezvikamu mukati medhaka.
Kuvandudzwa kuchinjika uye kutsemuka kuramba: Iyo firimu repolymer inochinjika uye ine ductile, ichipa iyo yakaomeswa dhaka rakakura deformation kugona. Izvi zvinoita kuti dhaka rikwanise kutora uye kugovera kushushikana kunokonzerwa nekushanduka kwekushisa, shanduko yehumidity, kana kutama kudiki kweiyo substrate, zvakanyanya kuderedza njodzi yekutsemuka (kupaza kuramba).
Kuvandudzwa kwemaitiro kuramba uye kupfeka kuramba: Iyo inochinjika yepolymer firimu inogona kutora simba rekuita uye kuvandudza mhedzisiro yekurwisa uye kupfeka kuramba kwedhaka.
Kudzikisa elastic modulus: kuita kuti dhaka ripfave uye riwedzere kuchinjika kune deformation ye substrate.
Latex poda inonatsiridza kubatana kwemukati (interface kuwedzera):
Kuwedzera iyo inoshanda nzvimbo ye cellulose ethers: Mvura-kuchengeta mhedzisiro ye cellulose ethers zvakare inoderedza dambudziko re "interfacial kushomeka kwemvura" kunokonzerwa nekunyanyisa kunyudzwa kwemvura ne substrate. Zvinonyanya kukosha, polymer powder particles / emulsions ine tsika yekutamira kune dhaka-substrate interface uye dhaka-reinforcement fiber (kana iripo) interface.
Kugadzira yakasimba interface layer: Iyo firimu repolymer rakaumbwa painterface rinopinda zvine simba uye rinomisa mukati meiyo substrate's micropores (pamuviri bonding). Panguva imwecheteyo, iyo polymer pachayo inoratidzira yakanakisa adhesion (kemikari / yemuviri adsorption) kune akasiyana-siyana substrates (concrete, zvidhinha, huni, EPS/XPS insulation boards, etc.). Izvi zvinonyanya kusimudzira chisungo chedhaka simba (kunamira) kune akasiyana substrates, zvese pakutanga uye mushure mekunyudzwa mumvura uye nechando-kunyungudika kutenderera (kuramba kwemvura uye kusagadzikana kwemamiriro ekunze).
Synergistic optimization ye pore chimiro uye kusimba:
Migumisiro ye cellulose ether: Kuchengetwa kwemvura kunogadzirisa simenti hydration uye kunoderedza maburi akasununguka anokonzerwa nekushaya mvura; air entraining effect inotangisa kudzora tuma pores.
Mhedzisiro yepolymer hupfu: Iyo polymer membrane inovhara zvishoma kana mabhiriji capillary pores, ichiita iyo pore chimiro chidiki uye kushoma kubatana.
Synergistic Mhedzisiro: Iyo yakasanganiswa mhedzisiro yezvinhu zviviri izvi inovandudza dhaka pore chimiro, kuderedza kunyura kwemvura uye kuwedzera kusamira kwayo. Izvi hazvingowedzere kusimba kwedhaka (chando-kunyunguduka kuramba uye kusaora kwemunyu), asi zvakare kunoderedza mukana weiyo efflorescence nekuda kwekuderedzwa kwemvura. Iyi yakagadziridzwa pore chimiro inosanganiswawo nesimba repamusoro.
Cellulose ether ndiyo "foundation" uye "guarantee": inopa iyo inodiwa yekuchengetedza mvura nharaunda (inogonesa simende hydration uye latex poda firimu kuumbwa), inogonesa kushanda (kuve nechokwadi chekuisa dhaka yunifomu), uye inokanganisa iyo microstructure kuburikidza nekukora uye kupinza mweya.
Redispersible latex poda ndeye "enhancer" uye "bhiriji": inoumba firimu repolymer pasi pemamiriro akanaka akagadzirwa ne cellulose ether, inovandudza zvakanyanya kubatana kwedhaka, kuchinjika, kutsemuka kuramba, kusimba kwechisungo, uye kusimba.
Core synergy: Kukwanisa kuchengetedza mvura kwe cellulose ether chinhu chinodiwa kuti ibudirire firimu rekugadzira latex powder. Pasina kuchengetwa kwemvura yakakwana, latex poda haigone kushanda zvizere. Sezvineiwo, iyo inochinjika kusungirirwa kwelatex poda inobvisa brittleness, kuputika, uye kusakwana kunamatira kweiyo yakachena simende-yakavakirwa zvinhu, zvakanyanya kusimbisa kusimba.
Zvakasanganiswa mhedzisiro: Izvo zviviri zvinosimudzirana mukuvandudza pore chimiro, kuderedza kunyura kwemvura, uye kuwedzera kusimba kwenguva refu, zvichikonzera synergistic mhedzisiro. Naizvozvo, mumadhaka emazuva ano (akadai semataira anonamira, ekunze insulation plaster / bonding mortars, self-leveling madhaka, madhaka asingapindi mvura, uye dhaka rekushongedza), cellulose ethers uye redispersible polymer powders anowanzo shandiswa ari maviri maviri. Nekunyatso gadzirisa mhando uye dosi yechimwe nechimwe, emhando yepamusoro zvigadzirwa zvedhaka zvinogona kugadzirwa kuti zvisangane nekuita kwakasiyana zvinodiwa. Yavo synergistic mhedzisiro ndiyo kiyi yekusimudzira madhaka echinyakare kuita yakakwira-inoshanda polymer-yakagadziridzwa simentitious macomposites.
Nguva yekutumira: Aug-06-2025