Ozugbo ihe simenti agbakwunyere na mmiri latex ntụ ntụ na-ejikọta mmiri, mmeghachi omume hydration na-amalite, na calcium hydroxide ngwọta ngwa ngwa na-erute saturation na kristal na-ebuli, ma n'otu oge ahụ, a na-emepụta kristal ettringite na calcium silicate hydrate gels. A na-edobe ihe ndị siri ike na gel na akụkụ ciment na-adịghị edozi. Ka mmeghachi omume hydration na-aga n'ihu, ngwaahịa hydration na-abawanye, na ihe ndị na-emepụta polymer na-eji nwayọọ nwayọọ na-agbakọta na pores capillary, na-emepụta akwa akwa akwa akwa n'elu gel na n'elu cement na-adịghị edozi.
Ihe nchịkọta polymer gbakọtara jiri nwayọọ nwayọọ na-ejupụta pores, ma ọ bụghị kpamkpam n'ime ime nke pores. Ka mmiri na-ebelata site na hydration ma ọ bụ ihicha, ihe ndị ahụ polymer juru n'ọnụ na gel na pores na-ejikọta n'ime ihe nkiri na-aga n'ihu, na-emepụta ngwakọta na-ejikọta ya na ciment cement hydrated ma na-eme ka hydration na-ejikọta ngwaahịa na nchịkọta. N'ihi na ngwaahịa hydration na polymers na-etolite oyi akwa mkpuchi na interface, ọ nwere ike imetụta uto nke ettringite na kristal calcium hydroxide na-enweghị isi; na n'ihi na ndị polymer na-agbakọta n'ime ihe nkiri na pores nke mpaghara mgbanwe interface, ihe ndị dabeere na ciment polymer Mpaghara mgbanwe dị njọ. Ndị otu na-arụ ọrụ na ụfọdụ mkpụrụ ndụ polymer ga-emepụta mmeghachi omume na-ejikọta ya na Ca2 + na A13 + na ngwaahịa hydration ciment iji mepụta njikọ akwa pụrụ iche, melite nhazi anụ ahụ nke ihe ndị dabeere na ciment siri ike, belata nrụgide dị n'ime, ma belata ọgbọ nke microcracks. Ka usoro ciment gel na-etolite, a na-eri mmiri ahụ ma na-eji nwayọọ nwayọọ na-emechi ihe ndị ahụ polymer na pores. Ka simenti na-agbakwu mmiri, mmiri dị na pores capillary na-ebelata, na ihe ndị ahụ polymer na-agbakọta n'elu nke ngwaahịa ciment hydration gel / unhydrated cement particle ngwakọta na mkpokọta, si otú ahụ na-etolite na-aga n'ihu na-akpachi anya oyi akwa na nnukwu pores jupụtara. na nnyapade ma ọ bụ onwe-nrapado ụmụ irighiri ihe.
A na-achịkwa ọrụ nke ntụ ntụ latex na-agbanwe agbanwe na ngwa agha site na usoro abụọ nke hydration ciment na imepụta ihe nkiri polymer. Ewubere usoro ihe mejupụtara nke ciment hydration na imepụta ihe nkiri polymer na usoro 4:
(1) Mgbe agwakọta uzuzu latex na-agbanwe agbanwe na ngwa ngwa ciment, a na-agbasasịkwa ya n'usoro;
(2) A na-edobe ihe ndị ahụ polymer n'elu nke ngwaahịa hydration ciment gel / unhydrated cement particle mix;
(3) The polymer ahụ na-etolite a na-aga n'ihu na kọmpat stacked oyi akwa;
(4) N'oge usoro hydration ciment, ihe ndị polymer juru n'ọnụ na-agbakọta n'ime ihe nkiri na-aga n'ihu, na-ejikọta ngwaahịa hydration ọnụ iji mepụta usoro netwọk zuru oke.
The chụgara emulsion nke redispersible latex ntụ ntụ nwere ike na-etolite a mmiri-adịghị ike na-aga n'ihu film (polymer netwọk ahụ) mgbe ihicha, na nke a ala na-agbanwe modulus polymer netwọk ahụ nwere ike melite arụmọrụ nke ciment; N'otu oge ahụ, na polymer molecule Ụfọdụ polar dị iche iche na simenti na-emeghachi omume chemically na ciment hydration ngwaahịa na-emepụta àkwà mmiri pụrụ iche, melite nhazi anụ ahụ nke ciment hydration ngwaahịa, na ibelata ma belata ọgbọ nke cracks. Mgbe agbakwunyere uzuzu latex redispersible, mmalite hydration nke ciment na-ebelata, ihe nkiri polymer nwere ike kechie akụkụ ciment ma ọ bụ kpamkpam, nke mere na ciment nwere ike ịmịcha ya nke ọma na ihe dị iche iche nwere ike imeziwanye ya.
Uzuzu latex na-agbanwe agbanwe na-arụ ọrụ dị mkpa dị ka ihe mgbakwunye na ngwa agha ihe owuwu. Ịgbakwunye redispersible latex ntụ ntụ n'ime ngwa agha nwere ike ịkwadebe ngwaahịa ngwa agha dị iche iche dị ka nrapado tile, ngwa mkpuchi thermal, ngwa agha na-edozi onwe ya, putty, plastering mortar, ngwa ngwa eji achọ mma, onye na-ejikọta ọnụ, nrụzi ngwa agha na ihe mkpuchi mmiri, wdg. Ngwa ngwa na ngwa. arụmọrụ nke ngwa agha ihe owuwu. N'ezie, e nwere nsogbu mgbanwe n'etiti redispersible latex ntụ ntụ na ciment, admixtures na admixtures, nke e kwesịrị inye nlebara anya zuru oke na ngwa ngwa.
Oge nzipu: Mar-14-2023