Kana zvinhu zvakagadzirwa nesimende zvawedzerwa ne latex powder zvasangana nemvura, hydration reaction inotanga, uye calcium hydroxide solution inokurumidza kusvika pakuzara uye makristaro anowira, uye panguva imwe chete, makristaro e ettringite uye calcium silicate hydrate gels zvinoumbwa. Zvidimbu zvakasimba zvinoiswa pa gel uye zvidimbu zvesimende zvisina mvura. Sezvo hydration reaction ichienderera mberi, hydration products inowedzera, uye zvidimbu zve polymer zvinoungana zvishoma nezvishoma muma capillary pores, zvichiita layer yakazara pamusoro pe gel uye pazvidimbu zvesimende zvisina mvura.
Zvidimbu zvepolymer zvakaunganidzwa zvinozadza mapores zvishoma nezvishoma, asi kwete zvachose pamusoro pemukati me pores. Sezvo mvura ichideredzwa zvakanyanya nekunyoroveswa kana kuomeswa, zvidimbu zvepolymer zvakasungirirwa pa gel nemu pores zvinobatana kuita firimu rinoenderera mberi, zvichigadzira musanganiswa unopindirana ne hydrated cement paste uye hydration inovandudza Kubatana kwezvigadzirwa nema aggregates. Nekuti zvigadzirwa zve hydration zvine ma polymers zvinoumba covering layer pa interface, zvinogona kukanganisa kukura kwe ettringite uye coarse calcium hydroxide crystals; uye nekuti ma polymers anoungana kuita mafirimu muma pores e interface transition zone, polymer based cement-based materials The transition zone denser. Mapoka anoshanda mune mamwe ma polymer molecules achagadzirawo cross-linking reactions ne Ca2+ ne A13+ mu cement hydration products kuti vagadzire ma bridge bonds akakosha, kuvandudza chimiro chemuviri chezvinhu zvakaomeswa zve cement, kuderedza kushushikana kwemukati, uye kuderedza kugadzirwa kwema microcracks. Sezvo cement gel structure ichikura, mvura inodyiwa uye zvidimbu zvepolymer zvinovharirwa zvishoma nezvishoma muma pores. Sezvo simende ichiwedzera kunyoroveswa, hunyoro huri muma capillary pores hunoderera, uye polymer particles dzinoungana pamusoro pe simende hydration product gel/unhydrated cement particles uye aggregate, nokudaro zvichiita kuti pave nechikamu chinogara chakabatana chine pores hombe. Yakazadzwa ne polymer particles dzinonamira kana kuti dzinozvinamira.
Basa rehupfu hwelatex hunonyungudika mudura rinodzorwa nemaitiro maviri ekunyorovesa simende uye kugadzirwa kwefirimu repolymer. Kuumbwa kwesystem yekubatanidza yehydration yesimende uye kugadzirwa kwefirimu repolymer kunopedzwa mumatanho mana:
(1) Mushure mekunge upfu hwelatex hunonyungudika hwasanganiswa nesimbi yesimbi, hunopararira zvakaenzana musystem;
(2) Zvidimbu zvepolymer zvinoiswa pamusoro pemusanganiswa wezvikamu zvesimende zvinonyungudutsa gel/zvidimbu zvesimende zvisina mvura;
(3) Zvidimbu zvepolymer zvinoumba jira rinoenderera mberi uye rakamanikana rakarongwa;
(4) Munguva yekunyorovesa simende, zvidimbu zvepolymer zvakabatana zvinoungana kuita firimu rinoramba richienderera mberi, zvichibatanidza zvigadzirwa zvemvura pamwe chete kuti zvigadzire chimiro chakakwana che network.
Emulsion yakapararira yeupfu hwelatex hunonyungudika inogona kugadzira firimu rinogara risinganyungudike mumvura (polymer network body) mushure mekuomeswa, uye iyi low elastic modulus polymer network body inogona kuvandudza mashandiro esimende; panguva imwe chete, mumorekuru yepolymer Mamwe mapoka epolar esimende anoita makemikari nezvigadzirwa zve hydration yesimende kuti agadzire mabhiriji akakosha, anovandudza chimiro chemuviri chezvigadzirwa zve hydration yesimende, uye anoderedza nekuderedza kugadzirwa kwemhasuru. Mushure mekunge upfu hwelatex hunonyungudika hwawedzerwa, mwero wekutanga we hydration yesimende unodzikira, uye firimu repolymer rinogona kuputira zvikamu zvesimende zvishoma kana zvachose, kuitira kuti simende ikwanise kunyungudika zvizere uye hunhu hwayo hwakasiyana-siyana hugone kuvandudzwa.
Upfu hwelatex hunonyungudika hunoita basa rakakosha sechinowedzerwa padhaka rekuvaka. Kuwedzera upfu hwelatex hunonyungudika mudhaka kunogona kugadzira zvigadzirwa zvakasiyana-siyana zvedhaka zvakaita se tile adhesive, thermal insulation mortar, self-leveling mortar, putty, plastering mortar, decoration mortar, jointing agent, repair mortar uye waterproof sealing material, nezvimwewo. Kushandiswa kwedhaka rekuvaka uye mashandiro aro. Ehe, kune matambudziko ekugadzirisa pakati pehupfu hwelatex hunonyungudika nesimende, admixtures uye admixtures, izvo zvinofanirwa kutariswa zvakakwana mukushandiswa kwakanangana.
Nguva yekutumira: Kurume-14-2023