Basa re redispersible latex poda mudhaka
Parizvino, sezvo zvigadzirwa zvakasiyana-siyana zvakakosha zvehupfu hwakaoma zvinogamuchirwa zvishoma nezvishoma uye kushandiswa zvakanyanya, vanhu vari muindasitiri vanoteerera kune inodhindwa zvakare latex poda seimwe yezvinowedzera zveiyo yakakosha yakaoma poda dhaka, saka hunhu hwakasiyana hwakaonekwa zvishoma nezvishoma. latex poda, multi-polymer latex poda, resin latex poda, mvura-based resin latex poda uye zvichingodaro.
Iyo microscopic zvimiro uye macroscopic kuita kweredispersible latex podamudhaka zvinosanganiswa, uye mamwe mhedzisiro yedzidziso inoongororwa. Maitiro ekuita redispersible latex poda Redispersible latex poda ndeyekugadzirira polymer emulsion mumusanganiswa unogona kushandiswa kupfapfaidza kuomesa nekuwedzera zvakasiyana-siyana, uye wobva wawedzera inodzivirira colloid uye anti-caking mumiririri kugadzira iyo polymer fomu mushure mekupfapfaidza kuomesa. Poda inoyerera yakasununguka inodhindwa zvakare mumvura. Iyo redispersible latex poda inogoverwa mudhaka yakavhenganiswa yakaoma. Mushure mokunge dhaka ramutswa nemvura, polima yehupfu inoparadzirwa zvakare mumucheka mutsva wakasanganiswa uye emulsified zvakare; nekuda kwe hydration ye simenti, kubuda kwepamusoro uye kutorwa kwechigadziko chepasi, pores mukati medhaka yakasununguka. Kuramba kuchishandiswa kwemvura uye nharaunda yakasimba yealkaline inopiwa nesimenti inoita kuti latex particles iome kuti iite mvura-isingasviki firimu inopfuurira mumatope. Iyi firimu inoenderera inoumbwa nekubatanidzwa kwezvikamu zvimwechete zvakapararira mu emulsion kupinda mumuviri wakafanana. Iko kuvepo kwemafirimu aya elatex akagoverwa mupolymer yakagadziridzwa dhaka inoita kuti iyo polymer yakagadziridzwa dhaka iwane hunhu husingagone kuve nedhaka resimende: nekuda kweiyo yega-kutambanudza mashandiro eiyo latex firimu, inogona kusungirirwa kugadziko kana dhaka Pakusangana kwepolymer yakagadziridzwa dhaka nechigadziko, mhedzisiro iyi inogona kuvandudza dhaka rakasarudzika semabhesi akasiyana-siyana sezvigadziko. high-density ceramic tiles uye polystyrene boards; Ichi chiitiko mukati medhaka chinogona kuichengeta sese, mune mamwe mazwi, kusimba kwakabatana kwedhaka kunovandudzwa, uye sezvo chiyero che redispersible latex powder chinowedzera, kusimba kwechisungo pakati pedhaka uye nheyo yekrete inovandudzwa zvakanyanya; Yakakwirira Kuvapo kwekushanduka uye yakanyanyisa kunyungudika kwepolymer domains yakavandudza zvikuru kushanda kwechisungo uye kushanduka kwedhaka, nepo elastic modulus yedhaka pachayo yakaderera zvikuru, zvichiratidza kuti kushanduka kwayo kwakagadziridzwa. Latex firimu rakacherechedzwa mukati medhaka mune polymer yakagadziridzwa simende dhaka pamazera akasiyana. Iyo firimu yakaumbwa nelatex inogovaniswa munzvimbo dzakasiyana mudhaka, kusanganisira base-mortar interface, pakati pemapores, yakatenderedza pore madziro, pakati pesimende hydration zvigadzirwa, zvakatenderedza simende zvimedu, zvakatenderedza aggregate, uye aggregate-dhaka interface. Mamwe mafirimu elatex akagoverwa mudhaka yakagadziridzwa neinodispersible polymer poda anoita kuti zvikwanisike kuwana zvivakwa zvisingagone kuve nedhaka resimende: iyo latex firimu inogona kubhura matsemu ekupwanya pa base-mortar interface uye kubvumira kutsemuka kupora kupora. Kuvandudza kuvharika kwedhaka. Kuvandudzwa kwesimba rakabatana redhaka: Kuvepo kweakanyanya kuchinjika uye yakanyanya elastic polymer domains inovandudza kuchinjika uye elasticity yedhaka, ichipa kubatana uye ine simba maitiro kune yakaoma skeleton. Kana simba rikaiswa, kuumbwa kwe microcrack kunononoka kusvika kushushikana kwakanyanya kwasvikwa nekuda kwekuvandudza kushanduka uye elasticity. Iyo interwoven polymer domains zvakare inotadzisa kubatanidzwa kwema microcracks mukupinda mukati. Naizvozvo, iyo redispersible latex poda inowedzera kutadza kushushikana uye kutadza kunetsa kwezvinhu. Kugadziriswa kwepolymer kune dhaka resimende kunoita kuti vaviri vacho vawane mhedzisiro, kuitira kuti iyo polymer yakagadziridzwa dhaka inogona kushandiswa muzviitiko zvakawanda zvakakosha. Pamusoro pezvo, nekuda kwezvakanaka zvekuoma-musanganiswa dhaka mukutonga kwemhando, kushanda kwekuvaka, kuchengetedza uye kuchengetedza kwezvakatipoteredza, redispersible latex poda inopa inoshanda tekinoroji nzira yekugadzira yakakosha dhaka zvigadzirwa.
Zvichienderana nemagadzirirwo echiito chepolymer poda inodhindwa mudhaka, takaita bvunzo dzekuenzanisa kuona kushanda kwechimwe chinhu chiri pamusika parizvino, chinozivikanwawo selatex poda, mudhaka. 1. Raw zvinhu uye bvunzo mhinduro 1.1 Raw material simende: Conch Brand 42.5 Ordinary Portland Cement Sand: River Sand, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Eteri: Domestic Viscosity 30000-35000mpas (Brookfield 2 upfu Viscometer, inorema calcium Viscometer) carbonate powder, fineness is 325 mesh Latex powder: VAE-based redispersible latex powder, Tg value is -7 ° C, pano inonzi: redispersible latex powder Wood fiber: ZZC500 yeJS kambani Inowanikwa nekutengesa latex powder: inotengeswa latex powder, inonzi pano: mechanical formulations inowanikwa latex powder test standard 97. (23±2)°C, hunyoro hunoenderana (50±5)%, bvunzo Kumhanya kwemhepo kunotenderera munzvimbo iri pasi pe0.2m/s. Yakaumbwa yakawedzera polystyrene board, yakawanda density i18kg/m3, yakachekwa kuita 400×400×5mm. 2. Mhedzisiro yemhedzisiro: 2.1 Kusimba kwesimba pasi penguva yekurapa kwakasiyana: Zvienzaniso zvakaitwa maererano neyedzo nzira yedhaka tensile bond simba muJG149-2003. Mushonga wekurapa pano ndewekuti: mushure mekunge sampu yaumbwa, inorapwa kwezuva rimwe pasi pemamiriro akajairwa erabhoritari, wozoisa muovheni ye50-degree. Vhiki yekutanga yekuedzwa ndeye: isa muvheni ye50-degree kusvika pazuva rechitanhatu, ibudise kunze, namatira kudhonza-out test musoro , Pazuva rechinomwe, seti yekudhonza-kunze kwesimba yakaedzwa. Muedzo muvhiki yechipiri ndeiyi: uise muvheni ye 50-degree kusvika pazuva rechigumi nematatu, bvisa, namatira musoro wekuedza wekudhonza, uye edza seti yekudhonza-kunze kwezuva regumi nemana. Vhiki rechitatu, vhiki yechina. . . zvichingoenda zvakadaro.
Kubva pane zvabuda, tinogona kuona kuti kusimba kweredispersible latex podamudhaka inowedzera uye inochengetedza sezvo nguva iri munzvimbo yepamusoro yekushisa inowedzera, iyo yakafanana nefirimu yelatex iyo redispersible latex powder ichaita mudhaka Dzidziso inopindirana, iyo yakareba nguva yekuchengetedza, iyo latex firimu ye latex powder inosvika kune imwe density, nokudaro kuve nechokwadi chekunamatira kwedhaka kune yakakosha nzvimbo yepamusoro yeEPS board. Pane zvinopesana, iyo inotengeswa inotengeswa latex powder 97 ine simba rakaderera sezvo inochengetwa munzvimbo yakakwirira-yekushisa kwenguva yakareba. Simba rinoparadza rekuparara kwelatex powder kubhodhi reEPS rinoramba rakafanana, asi simba rinoparadza rekutengesa rinowanikwa latex powder 97 kubhodhi reEPS riri kuwedzera kuipa.
Kazhinji kutaura, inotengeswa latex powder uye redispersible latex powder ine nzira dzakasiyana dzekuita, uye redispersible latex powder, iyo inoumba firimu munzvimbo dzakasiyana-siyana dzedhaka, inoita sechipiri gelling zvinhu kuti ivandudze zvinhu zvemuviri zvedhaka. Maitiro ekuita kwekuita haaenderani.
Nguva yekutumira: Kubvumbi-25-2024