EPS particle insulation motar is lightweight insulation material yakagadzirwa nekusanganisa inorganic binders, organic binders, admixtures, additives and light aggregates mune imwe chikamu. Pakati peEPS particle insulation mortars ikozvino yakadzidzwa uye inoshandiswa, redispersible latex poda ine simba guru pakushanda kwedhaka, inotora chikamu chepamusoro chemutengo, uye yakagara iri kutarisa. Kuita kwekubatanidza kweEPS particle insulation mortar yekunze madziro ekudzivirira system inonyanya kunobva kune polymer binder, iyo inonyanya kuumbwa nevinyl acetate/ethylene copolymers. Kupfapfaidza kuomeswa kwemhando iyi yepolymer emulsion inogona kugadzira redispersible latex poda. Redispersible latex poda yave tsika yekusimudzira mukuvaka nekuda kwekugadzirira kwayo, kufambisa kuri nyore uye kuchengetedza kuri nyore. Kuita kweEPS particle insulation mortar kunoenderana zvakanyanya nemhando uye huwandu hwepolymer inoshandiswa. Ethylene-vinyl acetate poda (EVA) ine yakakwira ethylene yemukati uye yakaderera Tg (girazi shanduko tembiricha) kukosha kune yakanakisa kuita mukukanganisa simba, kubatanidza simba uye kuramba mvura.
Redispersible polymer poda ichena, ine fluidity yakanaka, ine yunifomu particle size mushure mekupararira, uye ine yakanaka dispersibility. Mushure mekusanganiswa nemvura, iyo latex powder particles inogona kudzokera kune yavo yepakutanga emulsion state uye inochengetedza maitiro nemabasa se organic binder. Basa rekudhindwa zvakare repolymer poda mudhaka rekupisa rinodzorwa nemaitiro maviri: simende hydration uye polymer poda firimu kuumbwa. Iyo composite system yekugadzira maitiro e simenti hydration uye polymer poda firimu kuumbwa inopedzwa nematanho mana anotevera:
(1) Kana iyo latex poda yakasanganiswa nesamende dhaka, iyo yakapararira yakanaka polymer particles inoparadzirwa zvakaenzana muslurry.
(2) Cement gel inoumbwa zvishoma nezvishoma mupolymer / simende paste kuburikidza ne hydration ye simenti, chikamu chemvura chinozadzwa ne calcium hydroxide inoumbwa panguva ye hydration process, uye zvimedu zvepolymer zvinoiswa pamusoro pechiso chesimende gel / isina mvura. simende particle musanganiswa.
(3) Sezvo simende gel chimiro chinokura, mvura inopedzwa uye zvikamu zvepolymer zvishoma nezvishoma zvinovharirwa mumacapillaries. Sezvo simende ichiwedzera hydrate, mvura iri mumacapillaries inodzikira uye zvimedu zvepolymer zvinoungana pamusoro pesimende gel / unhydrated simende particle musanganiswa uye akareruka aggregates, achigadzira inoenderera uye yakasimba yakarongedzwa layer. Panguva ino, ma pores makuru anozadzwa nezvinonamira kana kuzvinamira zvimedu zvepolymer.
(4)Pasi pekuita kwe simende hydration, kunyura kwepasi uye kubuda kwepasi, hunyoro hunowedzera kudzikiswa, uye zvimedu zvepolymer zvakasungirirwa pane simende hydrate aggregate kuita firimu rinoenderera, richibatanidza zvigadzirwa zve hydration pamwechete kuti iite yakazara network chimiro. , uye chikamu chepolymer chinopindirana mukati mesement hydration slurry.
Cement hydration uye latex poda firimu-inogadzira kuumbwa inoumba itsva composite system, uye yavo yakasanganiswa maitiro inovandudza uye inosimudzira mashandiro eiyo thermal insulation mortar.
Mhedzisiro yepolymer poda yekuwedzera pane thermal insulation mortar simba
Iyo yakanyanya kuchinjika uye yakanyanya elastic polymer mesh membrane yakaumbwa nelatex poda inovandudza zvakanyanya mashandiro eiyo thermal insulation mortar, kunyanya kusimba kwesimba kunovandudzwa zvakanyanya. Kana simba rekunze rinoshandiswa, kuitika kwe micro-cracks kuchagadziriswa kana kuderedzwa nekuda kwekuvandudzwa kwekubatana kwese kwedhaka uye elasticity yepolymer.
Kusimba kwekusimba kweiyo thermal insulation mortar inowedzera nekuwedzera kwepolymer powder content; iyo flexural simba uye simba rekumanikidza rinodzikira kune imwe nhanho nekuwedzera kwelatex poda yemukati, asi inogona kuzadzisa zvinodiwa zvekushongedza kwekunze kwemadziro. Iyo compression flexure idiki, iyo inoratidza kuti thermal insulation mortar ine yakanaka kuchinjika uye deformation performance.
Zvikonzero zvikuru nei upfu hwepolymer huchivandudza simba rekusimba ndeichi: panguva yekubatana uye kuomeswa kwedhaka, iyo polima inoputika uye inogadzira firimu munzvimbo yekuchinja pakati peEPS particles uye simende paste, zvichiita kuti kuwirirana pakati pezviviri denser uye zvakasimba; chikamu chepolymer chinoparadzirwa muchina semendi uye chakanyungudutswa kuita firimu pamusoro pesimende hydrate gel kuti iite polymer network. Iyi yakaderera elastic modulus polymer network inovandudza kuoma kwesimende yakaoma; mamwe mapoka epolar ari mumapolymer mamorekuru anogonawo kuita zvemakemikari nesimende hydration zvigadzirwa kuti zvigadzire mabheji akakosha, nekudaro achinatsiridza chimiro chesimende hydration zvigadzirwa uye kuderedza kushushikana kwemukati, nekudaro kudzikisa chizvarwa che microcracks mune simende paste.
Mhedzisiro yezve redispersible polymer poda dosage pakushanda kwekushanda kweEPS thermal insulation mortar.
Nekuwedzera kwe latex powder dosage, kubatana uye kuchengetedza mvura kunovandudzwa zvakanyanya, uye kushanda kwekushanda kunogadziriswa. Kana iyo dosi inosvika 2.5%, inogona kuzadzisa zvizere zvinodiwa zvekuvaka. Kana iyo dosage yakawandisa, viscosity yeEPS thermal insulation mortar yakanyanya kukwirira uye fluidity yakaderera, iyo isingakodzeri kuvaka, uye mutengo wedhaka unowedzera.
Chikonzero chinoita kuti hupfu hwepolymer huwedzere kushanda kwedhaka ndechekuti polima hupfu ndeyepamusoro molecular polymer ine mapoka epolar. Kana polima poda yakasanganiswa neEPS zvidimbu, izvo zvisiri-polar zvikamu muketani huru yepolymer poda inodyidzana nezvikamu zveEPS. Physical adsorption inoitika pane isiri-polar pamusoro peEPS. Mapoka epolar ari mupolymer anotariswa kunze pamusoro peEPS particles, zvichiita kuti EPS zvidimbu zvishanduke kubva kuhydrophobic kuenda kuhydrophilic. Pamusana pekugadzirisa kweiyo latex powder pamusoro peEPS particles, dambudziko rekuti maEPS particles anowanikwa nyore nyore kumvura anogadziriswa. Dambudziko rekuyangarara uye dhaka rakakura kuisa. Kana simende yawedzerwa uye yakasanganiswa panguva ino, mapoka epolar adsorbed pamusoro peEPS particles anopindirana nesamende uye akanyatsobatanidzwa, nokudaro achivandudza zvakanyanya kushanda kweEPS insulation mortar. Izvi zvinoratidzwa mukuti zvimedu zveEPS zvinonyoroveswa nyore nyore nesamende slurry, uye simba rekubatanidza pakati pezviviri rinovandudzwa zvikuru.
Redispersible polymer poda chinhu chakakosha chepamusoro-kuita EPS particle insulation slurry. Maitiro ayo ekuita ndeekuti mapolymer particles ari muhurongwa aggregate kuita firimu rinoenderera, richibatanidza simende hydration zvigadzirwa pamwe chete kuti iite yakazara network chimiro uye yakasimba kusanganisa neEPS zvimedu. Iyo inosanganiswa system ye redispersible polymer poda uye zvimwe zvinosungirira zvine yakanaka yakapfava elastic mhedzisiro, iyo inovandudza zvakanyanya kusimba kwekusimba uye kuita kwekuvaka kweEPS particle insulation mortar.
Nguva yekutumira: Zvita-30-2024