Ngwakọta ihe mkpuchi nke EPS bụ ihe mkpuchi dị fechaa nke a na-eme site na ịgwakọta ihe nkedo inorganic, ihe nkedo organic, ihe mgbakwunye, ihe mgbakwunye na mkpokọta ọkụ n'otu akụkụ. N'ime ngwa agha mkpuchi nke EPS nke a na-amụ ugbu a ma tinye ya n'ọrụ, uzuzu latex na-agbanwe agbanwe nwere mmetụta dị ukwuu na arụmọrụ nke ngwa agha ahụ, na-edekọ ọnụ ọgụgụ dị elu nke ọnụ ahịa, na mgbe ọ bụ ihe a na-elekwasị anya. Arụmọrụ nkekọ nke EPS urughuru mkpuchi ngwa agha mpụta mgbidi mkpuchi na-esite na polymer ihe nkedo, nke na-abụkarị nke vinyl acetate/ethylene copolymers. Ịkpọsa ụdị nke emulsion polymer nwere ike ịmepụta ntụ ntụ latex na-agbanwe agbanwe. Uzuzu latex na-agbanwe agbanwe aghọwo ihe na-emepe emepe na-ewu n'ihi nkwadebe ya nke ọma, njem dị mma na nchekwa dị mfe. Nrụmọrụ nke ngwa mgbochi ihe mkpuchi nke EPS na-adabere n'ụzọ dị ukwuu n'ụdị na ọnụọgụ polymer ejiri. Ethylene-vinyl acetate ntụ ntụ (EVA) nke nwere nnukwu ethylene ọdịnaya na Tg dị ala (ntụgharị iko iko) uru nwere arụmọrụ dị mma na ike mmetụta, ike njikọ na mgbochi mmiri.
Redispersible polymer ntụ ntụ na-acha ọcha, nwere ezi fluidity, nwere otu urughuru size mgbe redispersion, na nwere ezi dispersibility. Mgbe ịgwakọta na mmiri, na latex ntụ ntụ irighiri nwere ike ịlaghachi na mbụ emulsion ala ha na-ejigide àgwà na ọrụ dị ka ihe nkedo organic. Ọrụ nke redispersible polymer ntụ ntụ na thermal mkpuchi ngwa agha na-achịkwa usoro abụọ: ciment hydration na polymer powder film guzobe. Usoro nhazi usoro nhazi nke ciment hydration na polymer powder film emechara site na usoro anọ ndị a:
(1) Mgbe a na-agwakọta ntụ ntụ latex na ngwa ngwa ciment, a na-agbasasị ihe ndị dị mma nke polima na-agbasasị na slurry.
(2) A na-eji nwayọọ nwayọọ na-emepụta gel ciment na polymer / ciment mado site na hydration nke ciment, mmiri mmiri na-ejupụta na calcium hydroxide kpụrụ n'oge usoro hydration, na polymer particles na-edebe na akụkụ nke elu nke ciment gel / unhydrated. ngwakọta simenti.
(3) Dị ka ciment gel Ọdịdị na-etolite, mmiri na-eri na polymer ahụ ji nwayọọ nwayọọ na-ejichi na capillaries. Ka simenti na-emewanyewanye hydrates, mmiri dị na capillaries na-ebelata na ihe ndị dị na polymer na-agbakọta n'elu nke cement gel / unhydrated cement particle mix na ìhè aggregates, na-akpụ a na-aga n'ihu na tightly juru n'ọnụ oyi akwa. N'ebe a, nnukwu pores na-ejupụta na ihe ndị na-egbuke egbuke ma ọ bụ nke na-ejide onwe ya.
(4) N'okpuru omume nke ciment hydration, isi absorption na elu evaporation, na mmiri ọdịnaya na-n'ihu belatara, na polymer ahụ tightly stacked na ciment hydrate mkpokọta n'ime a na-aga n'ihu film, bonding na hydration ngwaahịa ọnụ na-etolite a zuru ezu netwọk Ọdịdị. , na usoro polymer na-agbakọba n'ime oge niile nke ciment hydration slurry.
Simenti hydration na latex ntụ ntụ na-emepụta ihe nkiri na-eme ka usoro ihe mejupụtara ọhụrụ na-emepụta, na mmetụta ha jikọtara na-eme ka mma ma na-eme ka arụ ọrụ nke mkpuchi mkpuchi ọkụ.
Mmetụta nke mgbakwunye ntụ ntụ polymer na ike mkpuchi mkpuchi thermal
Ihe mkpuchi mkpuchi polymer na-agbanwe nke ukwuu na nke na-agbanwe nke ukwuu nke ejiri ntụ ntụ latex na-eme ka arụ ọrụ nke mkpuchi mkpuchi ọkụ dịkwuo mma, ọkachasị ike tensile na-akawanye mma. Mgbe a na-etinye ike dị n'èzí, ihe omume nke micro-cracks ga-adaba ma ọ bụ mee ka ọ daa n'ihi nkwalite nke mkpokọta mkpokọta nke ngwa agha na ngbanwe nke polymer.
Ike nkwụsị nke ngwa agha mkpuchi ọkụ na-abawanye na mmụba nke ọdịnaya ntụ ntụ polymer; ike na-agbanwe agbanwe na ike mkpakọ na-ebelata ruo n'ókè ụfọdụ na mmụba nke ọdịnaya ntụ ntụ latex, ma ka nwere ike izute ihe ndị a chọrọ na mgbidi mpụta mma. Mgbanwe mkpakọ dị ntakịrị, nke na-egosipụta na ngwa agha mkpuchi ọkụ nwere ezigbo mgbanwe na nrụrụ arụ ọrụ.
Isi ihe mere na polymer powder mma tensile ike bụ: n'oge coagulation na hardening usoro nke ngwa agha, na polymer ga-gel na-emepụta ihe nkiri na mgbanwe mpaghara n'etiti EPS ahụ na ciment mado, na-eme ka interface n'etiti abụọ denser na ike; A na-agbasa akụkụ nke polymer n'ime ciment mado ma tinye ya n'ime ihe nkiri dị n'elu ciment hydrate gel iji mepụta netwọk polymer. Netwọk polymer a dị ala na-agbanwe agbanwe na-eme ka ike nke ciment siri ike dịkwuo mma; ụfọdụ ndị otu polar dị na mkpụrụ ndụ polymer nwekwara ike meghachi omume kemịkalụ na ngwaahịa ciment hydration iji mepụta nsonaazụ pụrụ iche, si otú a na-emezi usoro anụ ahụ nke ngwaahịa hydration ciment na ibelata nrụgide dị n'ime, si otú ahụ belata ọgbọ nke microcracks na tapawa ciment.
Mmetụta nke usoro ọgwụgwọ polymer ntụ ntụ redisspersible na arụ ọrụ nke EPS thermal ikpuchi ngwa agha.
Site na mmụba nke ọgwụ ntụ ntụ latex, njikọta na njigide mmiri na-eme ka ọ dịkwuo mma, na arụ ọrụ na-arụ ọrụ kachasị mma. Mgbe usoro onunu ogwu ruru 2.5%, ọ nwere ike gboo mkpa ihe owuwu. Ọ bụrụ na usoro onunu ogwu dị oke, viscosity nke EPS thermal insulation mortar dị oke elu na mmiri dị ala, nke na-adịghị mma maka iwu ụlọ, ọnụ ahịa ngwa agha na-abawanye.
Ihe kpatara na ntụ ntụ polymer na-eme ka arụ ọrụ nke ngwa agha dịkwuo elu bụ na polymer ntụ ntụ bụ polymer dị elu nke nwere otu polar. Mgbe a na-agwakọta ntụ ntụ polymer na ihe EPS, akụkụ ndị na-abụghị polar na isi iyi nke polymer powder ga-emekọrịta ihe na ihe EPS. Mgbasa ozi anụ ahụ na-eme n'elu EPS na-abụghị polar. Otu polar dị na polymer na-atụgharị anya n'elu akụkụ nke EPS, na-eme ka ihe EPS gbanwee site na hydrophobic gaa na hydrophilic. N'ihi mgbanwe mgbanwe nke latex ntụ ntụ n'elu akụkụ nke EPS, a na-edozi nsogbu ahụ nke na-eme ka ihe EPS kpughee ngwa ngwa na mmiri. Nsogbu nke ise n'elu mmiri na nnukwu ngwa agha layering. Mgbe a na-agbakwunye ciment ma gwakọta ya n'oge a, ndị otu polar na-adaba n'elu akụkụ EPS na-ejikọta ciment ahụ ma jikọta ya nke ọma, si otú ahụ na-eme ka ọrụ nke mkpuchi mkpuchi EPS dịkwuo mma. A na-egosipụta nke a n'eziokwu ahụ bụ na a na-eji ciment slurry na-eme ka akụkụ EPS dị mfe, na ike njikọ dị n'etiti abụọ ahụ na-akawanye mma.
polymer ntụ ntụ redispersible bụ ihe dị mkpa akụrụngwa nke elu-arụmọrụ EPS urughuru mkpuchi slurry. Usoro ya na-eme bụ tumadi na ihe ndị na-emepụta polymer na usoro ahụ na-agbakọta n'ime ihe nkiri na-aga n'ihu, na-ejikọta ngwaahịa hydration ciment ọnụ iji mepụta usoro netwọk zuru oke ma jikọta ya na ihe EPS. The mejupụtara usoro nke redispersible polymer ntụ ntụ na ndị ọzọ binders nwere ezigbo nro na-agbanwe mmetụta, nke ukwuu mma na bonding ike tensile na-ewu arụmọrụ nke EPS urughuru mkpuchi ngwa agha.
Oge nzipu: Dec-30-2024