Uburyo bwa Redispersible Emulsion Ifu yumye ivanze Mortar

Ifu ya redispersible latex hamwe nandi mavuta adasanzwe (nka sima, lime yatoboye, gypsumu, ibumba, nibindi) hamwe nibintu bitandukanye, ibyuzuza nibindi byongerwaho [nka hydroxypropyl methylcellulose, polysaccharide (krahisi ether), fibre fibre, nibindi]. muri minisiteri yumye ivanze no kuvanga kumubiri. Iyo ifu yumye yumye yongewe mumazi hanyuma ikayungurura, hifashishijwe imbaraga za hydrophilique irinda colloid hamwe nimbaraga zo gukata imashini, uduce twa porojeri ya latx irashobora gukwirakwira vuba mumazi, ibyo bikaba bihagije kugirango habeho ifu ya latx idasubirwaho. firime. Ibigize ifu ya reberi igira ingaruka zitandukanye kumiterere ya rheologiya ya minisiteri hamwe nubwubatsi butandukanye: guhuza ifu ya latex kumazi mugihe yongeye gusubirwamo, ububobere butandukanye bwifu ya latex nyuma yo gutatanya, ingaruka kubirere ya minisiteri no gukwirakwiza ibyuka bihumeka, Imikoranire hagati yifu ya reberi nizindi nyongeramusaruro ituma ifu ya latex itandukanye igira ingaruka zo kongera amazi, kongera thixotropy, no kongera ubukonje.

Muri rusange abantu bemeza ko uburyo bwa pisitori ya latx isubirwamo kugirango yongere imikorere ya minisiteri nshya ni: guhuza ifu ya latex, cyane cyane colloid ikingira, amazi iyo ikwirakwijwe, byongera ubwiza bwikibabi, kandi bikanoza ubumwe. minisiteri yo kubaka.

Nyuma yo kuvangwa na minisiteri ivanze irimo ifu ya latx ikwirakwizwa, hamwe no kwinjiza amazi hejuru yubutaka, gukoresha reaction ya hydration, hamwe no guhindagurika mukirere, amazi azagabanuka buhoro buhoro, ibice bya resin bizagenda byegereza buhoro buhoro, intera buhoro buhoro, kandi ibisigarira bizagenda bihuza buhoro buhoro. amaherezo polymerized muri firime. Inzira yo gukora firime ya polymer igabanijwemo ibyiciro bitatu. Mu cyiciro cya mbere, ibice bya polymer bigenda byisanzuye muburyo bwimikorere ya Brownian muri emulsion yambere. Amazi amaze guhinduka, kugenda kwingirangingo mubisanzwe biragenda bigabanuka, kandi ubushyamirane hagati yamazi nikirere bubahatira guhuza buhoro buhoro. Mu cyiciro cya kabiri, iyo ibice bihuye, amazi yo murusobe azenguruka binyuze mumiyoboro ya capillary, kandi impagarara nyinshi za capillary zikoreshwa hejuru yibice bitera ihindagurika ryimiterere ya latex kubihuza hamwe, kandi amazi asigaye yuzuza imyenge, kandi firime iba ikozwe hafi. Icyiciro cya gatatu, cyanyuma cyemerera gukwirakwiza (rimwe na rimwe bita kwifata) ya molekile ya polymer gukora firime yukuri ikomeza. Mugihe cyo gukora firime, uduce tumwe na tumwe twa mobile twateranije duhuza icyiciro gishya cya firime hamwe na stress nyinshi. Ikigaragara ni uko kugira ngo ifu ya polymer isubirwemo kugirango ikore firime muri minisiteri ikomye, birakenewe ko harebwa niba ubushyuhe buke bwa firime (MFT) buri munsi yubushyuhe bwo gukiza bwa minisiteri.

Colloids - inzoga za polyvinyl zigomba gutandukana na sisitemu ya firime ya polymer. Ntabwo arikibazo kiri muri sisitemu ya alkaline ciment mortar, kubera ko inzoga ya polyvinyl izajya itunganywa na alkali iterwa na hydrata ya sima, kandi adsorption yibikoresho bya quartz izatandukanya buhoro buhoro inzoga za polyvinyl na sisitemu, nta hydrophilique irinda colloid. , Filime yakozwe no gukwirakwiza inshuro imwe yifu ya redxersible powder, nayo ubwayo idashonga mumazi, ntishobora gukora mubihe byumye gusa, ariko no mubihe byigihe kirekire byo kwibiza mumazi. Birumvikana ko muri sisitemu itari alkaline, nka sisitemu ya gypsumu cyangwa yuzuza gusa, kubera ko inzoga za polyvinyl ziracyariho muri firime ya nyuma ya polymer, bigira ingaruka ku kurwanya amazi ya firime, mugihe ubwo buryo budakoreshwa mumazi maremare. kwibiza, na polymer iracyafite imiterere yihariye yubukanishi, kandi ifu ya polymer isubirwamo irashobora gukoreshwa muri sisitemu.

Hamwe nimikorere ya nyuma ya firime ya polymer, sisitemu igizwe nububiko bwa organic organique na organic binder ikorwa mumabuye yakize, ni ukuvuga skeleton yamenetse kandi ikomeye igizwe nibikoresho bya hydraulic, kandi ifu ya latx idasubirwaho ikora firime hagati yicyyuho na Ubuso bukomeye. urusobe rworoshye. Imbaraga zingana hamwe no guhuza firime ya polymer resin yakozwe nifu ya latex irazamurwa. Bitewe nubworoherane bwa polymer, ubushobozi bwo guhindura ibintu burenze kure ubwubatswe bwa sima yamabuye ya sima, imikorere ya deforme ya minisiteri iratera imbere, kandi ingaruka zo gukwirakwiza stress ziratera imbere cyane, bityo bikazamura imbaraga zo guhangana na minisiteri. .

Hamwe no kwiyongera kwibirimo byifu ya redxersible powder, sisitemu yose itera imbere yerekeza kuri plastiki. Ku bijyanye nifu ya latx nyinshi, icyiciro cya polymer muri minisiteri yakize iragenda irenga buhoro buhoro icyiciro cyibicuruzwa biva mu mahanga, kandi minisiteri izahinduka ihindagurika kandi ihinduka elastomer, mugihe ibicuruzwa biva muri sima bihinduka "uwuzuza". “. Imbaraga zingana, elastique, guhinduka no gufunga minisiteri yahinduwe nifu ya redispersible latex byose byatejwe imbere. Kuvanga ifu ya redxersible latex ifasha firime ya polymer (firime ya latex) gukora no gukora igice cyurukuta rwa pore, bityo igafunga imiterere ya minisiteri. Indangantego ya latex ifite uburyo bwo kurambura imbaraga zitera impagarara aho zometse kuri minisiteri. Binyuze muri izo mbaraga zimbere, minisiteri ikomeza muri rusange, bityo ikongerera imbaraga zifatika za minisiteri. Kuba polimeri ihindagurika cyane kandi yoroheje cyane itezimbere ubworoherane nubworoherane bwa minisiteri.

Uburyo bwo kongera imbaraga zumusaruro nimbaraga zo kunanirwa nuburyo bukurikira: iyo hashyizweho ingufu, microcrack ziratinda kugeza igihe impagarara nyinshi zagerwaho bitewe nubworoherane nubworoherane. Byongeye kandi, imiyoboro ya polymer ihujwe nayo ibuza guhuriza hamwe microcrack mu gucengera. Kubwibyo, isupu ya polymer isubirwamo itera kunanirwa kunanirwa no kunanirwa kwibikoresho.

Filime ya polymer muri polymer yahinduwe ya minisiteri igira ingaruka zikomeye kumyuma ikomeye. Ifu ya redispersible latex ikwirakwizwa kuri interineti igira urundi ruhare nyuma yo gutatana no gukora firime, aribyo kongera kwizirika kubikoresho byavuzwe. Muri microstructure ya powder polymer yahinduwe ya tile ihuza minisiteri hamwe na tile yimbere, firime yakozwe na polymer ikora ikiraro hagati yamabati ya vitrifike hamwe no kwinjiza amazi make cyane na materique ya sima. Agace gahuza hagati yibikoresho bibiri bidasa ni ahantu hashobora kwibasirwa cyane no kugabanuka kugirango habeho kandi biganisha ku gutakaza ubumwe. Kubwibyo, ubushobozi bwa firime ya latex yo gukiza ibice byo kugabanuka ningirakamaro cyane kumatafari.

Muri icyo gihe, ifu ya redispersible latex irimo Ethylene ifata cyane cyane insimburangingo ngengabuzima, cyane cyane ibikoresho bisa, nka polyvinyl chloride na polystirene. Urugero rwiza ni mugihe cya masike.