Gadzira dhaka nyowani rine kuchengetedza mvura kwakanaka:

Cement hydration process inzira inononoka, senge simende haigone kusangana nemvura kwenguva yakareba, simende haigone kuenderera mberi ne hydration, zvichikanganisa kusimba kwesimba rekupedzisira. Iyo polymer yakagadziridzwa dhaka ine simba rakakwirira kupfuura yakajairika kukosha, chikonzero ndechekuti iyoredispersible polymer podainovandudza simba rekuchengetedza mvura, kuitira kuti simba rekupedzisira resimende riwedzere. Kechipiri, kuumbwa kwechikamu chidiki chepolymer mudhaka, kuvandudza simba rechisungo.

Kuvandudza kushanda kwekuvaka dhaka nyowani:

Mushure mekuwedzera redispersible polymer poda mudhaka yakaoma yakasanganiswa, kushanda kwedhaka kunovandudzwa zvakanyanya, izvo zvinonyanya kukonzerwa nezvikonzero zvinotevera: A. Pakusanganisa redispersible polymer poda nedhaka, nokuti redispersible polymer poda zvidimbu zvakaputirwa nemvura-inonyunguduka inodzivirira colloid. , iyo yekuputira layer inogona kudzivirira isingachinjike coalescation pakati pepolymer particles kuitira kuti pave nekuzora mhedzisiro pakati pezvimedu, polymer zvimedu zvinogona kuparadzirwa zvakaenzana muhuremu hwesamende slurry, Aya akaparadzirwa zvimedu, senge mabhero ebhora, anogona kuita kuti dhaka riyerere zvakasiyana uye kugadzirisa kushanda kwedhaka. B. redispersible polymer hupfu pachayo ine imwe mhepo inokonzera mhedzisiro, redispersible polymer hupfu pamhepo induction effect inofanira kupa dhaka compressibility, kuitira kuti dhaka rive rakanaka kuvaka workability. Uye zvakare, kuvepo kwema micro bubbles zvakare kunotamba inotenderedza basa mumusanganiswa kuitira kuvandudza kushanda kwemusanganiswa.

Redispersible polymer hupfukuvandudza kuchinjika uye kutsemuka kuramba kwedhaka:

Mushureredispersible polymer podainowedzerwa kune dhaka, the mortar compression ratio uye tensile ratio inovandudzwa zvakanyanya, izvo zvinoratidza kuti brittleness yevhu inoderedzwa zvakanyanya, kuomarara kunovandudzwa zvakanyanya, kuitira kuti kutsemuka kuramba kwedhaka kunovandudzwa.redispersible polymer podamudhaka rinobvisa mvura mufirimu, kwete kungozadza zvikanganiso uye pores mumatombo esimende, asiwo kune cementhydration zvigadzirwa uye aggregate gluing kuti igadzire polymer interpenetrating network, nekuti elastic modulus yepolymer firimu yakaderera pane iyo yedhaka, saka brittleness yedhaka. inoderedzwa. Iyo dhaka inoshanduka inowedzera iyo yakanyanya deformation muganho wedhaka kana ichinge yakuvadzwa, uye simba rinodiwa nehurema uye micro-crack propagation inonyudzwa kusvika pamwero mukuru, kuitira kuti dhaka rikwanise kutakura kushushikana kukuru kusati kwatadza. Pamusoro pezvo, iyo firimu yepolymer ine yekuzvimisikidza, uye iyo firimu repolymer inoumba skeleton yakaomarara mune simende hydrated dhaka, iyo ine inofambiswa yakabatana maitiro, kuve nechokwadi kusimba uye kusimba kweakaomarara skeleton. Kune ma pores pamusoro pepolymer firimu akaumbwa pamusoro pevhu zvidimbu, uye pores anozadzwa nedhaka, izvo zvinoderedza kushushikana kwekushushikana uye kuburitsa kuzorora pasina kukuvara pasi pekuita kwemasimba ekunze. Kuvapo kwekuchinjika kwepamusoro uye yakakwirira elasticity polymer nzvimbo inovandudzawo kuchinjika uye elasticity yedhaka.