Iji meziwanye brittleness na elu na-agbanwe modul nke simenti omenala na ngwa agha, ọ na-adịkarị mkpa ịgbakwunye uzuzu latex redispersible dị ka ihe mgbakwunye, nke nwere ike inye ciment ngwa ngwa mgbanwe dị mma na ike nkwụsị. Iji guzogide ma na-egbu oge ọgbọ ciment ngwa agha cracks, n'ihi na polymer na ngwa agha na-etolite interpenetrating netwọk Ọdịdị, a na-aga n'ihu polymer film na-guzobere na pores, nke na-ewusi bonding n'etiti aggregates na blocks akụkụ na ngwa agha Pores, otú ahụ gbanwetụrụ. ngwa agha mgbe emesiri ike emeela ka arụmọrụ dị mma karịa ngwa ngwa ciment.
A na-emepụta ntụ ntụ latex site na okpomọkụ dị elu, nrụgide dị elu, ịgbasa ihicha na homopolymerization dị iche iche na-arụsi ọrụ ike micropowders, nke nwere ike imeziwanye ike nke njikọ na ike ike nke ngwa agha, ma nwee ezigbo arụmọrụ nke mgbochi ịdaba, njide mmiri na ndi siri ike. , Mmiri na-eguzogide na ifriizi-thaw resistance , Magburu onwe okpomọkụ na-eguzogide ịka nká, ihe dị mfe, dị mfe iji. Xindadi latex ntụ ntụ nwere ezigbo ndakọrịta na ciment, nwere ike gbazee kpamkpam na ciment dabeere na akọrọ-agwakọta ngwa agha mado, adịghị ebelata ike nke ciment mgbe ọgwụgwọ, ọ bụghị nanị na-ejigide ndị magburu onwe adhesion, film-akpụ Njirimara na mgbanwe, ma na-enwe ezi mma. Mgbochi ihu igwe, nkwụsi ike, arụmọrụ njikọ na mgbape mgbape. Mgbe ihichachara, ọ nwere ike igbochi mmebi nke ikuku acidic na mgbidi ahụ, ọ dịghịkwa mfe ịkwanye na deliques mgbe mmiri gasịrị. Ọ nwere ike welie ike nke ngwaahịa. Ịtinye uzuzu latex redisspersible na putty ntụ ntụ na ngwa agha nwere ike ime ka ike ya dịkwuo elu, ọ na-enye aka na-emeziwanye ike. Ọ nwere ọrụ mgbochi mmiri pụtara ìhè, ike njikọ dị mma, nwekwara ike ịbawanye ngwa ngwa nke ngwa agha ahụ ma nwee ogologo oge oghe, ma nyekwa ngwa agha ahụ ezigbo nguzogide alkali, ma nwee ike melite adhesion / adhesiveness na flexural resistance of the mortar. Na mgbakwunye na ike, na-eyi nguzogide na ịrụ ọrụ, ọ nwere ngbanwe siri ike na ngwa agha mgbochi na-agbanwe agbanwe.
N'ikwu okwu, ntụ ntụ nke nwere iko mgbanwe okpomọkụ n'okpuru 5 Celsius C na-agbanwe ma na-ejikarị ya na mgbidi mkpuchi mgbidi, na latex ntụ ntụ nwere iko mgbanwe okpomọkụ n'elu 10 ° C na-ejikarị na adhesives na nhazi onwe ya. ngwa agha .
Dabere na ngwakọta nke ngwa agha ahụ, arụ ọrụ ngwa ngwa nke ngwa agha ga-emetụtakwa mgbanwe nke ego agbakwunyere nke ntụ ntụ latex redispersible: ọnụ ọgụgụ agbakwunyere na-erughị 1%, nke nwere mmetụta ụfọdụ. na-ewu na adhesion nke ngwa agha; Mgbakwunye nke latex ntụ ntụ redispersible bụ 1, 2.0%, nke na-eme ka ike dị ike, nkwụsị mmiri na mgbanwe nke ngwa agha; mgbakwunye nke redispersible latex ntụ ntụ bụ 2.0, 5%, na-eme ihe nkiri polymer netwọk na ngwa agha. N'okpuru ihu igwe dị iche iche na ihu igwe, ike na mgbanwe nke ngwa agha na-akawanye mma.
N'ihe banyere ọdịnaya ntụ ntụ dị elu, usoro polymer n'ime ngwa agha a gwọrọ ji nwayọọ nwayọọ gafere oge nke ngwaahịa hydration inorganic, ngwa agha ahụ na-enwe mgbanwe dị mma wee ghọọ ahụ na-agbanwe agbanwe, ebe ngwaahịa hydration nke ciment na-aghọ "filler". ". Ihe nkiri a na-emepụta site na redispersible latex ntụ ntụ na-ekesa na interface na-arụ ọrụ ọzọ dị mkpa, ya bụ, ịkwalite nrapado na ihe ndị a na-akpọtụrụ, nke dabara maka ụfọdụ ebe siri ike ịrapara, dị ka mmịnye mmiri dị oke ala ma ọ bụ na-abụghị. Ebe ndị na-amịkọrọ mmiri (dị ka ihe na-adịghị mma na ihe simenti, efere ígwè, brik dị n'ụdị, mgbidi brik vitrified, wdg) na ihe ndị na-emepụta ihe (dị ka bọọdụ EPS, plastik, wdg) dị mkpa karịsịa. N'ihi na a na-enweta njikọ nke ihe site na nrapado meta-mechanical site na ụkpụrụ nke ntinye igwe, ya bụ, slurry hydraulic na-abanye n'ime oghere nke ihe ndị ọzọ, jiri nwayọọ nwayọọ na-esiwanye ike, na n'ikpeazụ na-ejide ngwa agha ahụ dị ka igodo agbakwunyere na mkpọchi. . N'elu ihe, n'ihi na n'elu siri ike na-njikọ elu, n'ihi enweghị ike n'ụzọ dị irè banye n'ime ihe na-etolite ọma n'ibu embedding, ngwa agha na naanị inorganic adhesives na-adịghị irè bonded ya, na electron. nlele microscope dịkwa mma nke ukwuu. Ọ na-egosi ya. Usoro njikọ nke polymers dị iche. Polymers njikọ na elu nke ihe ndị ọzọ site intermolecular agha, na-adabere na porosity nke elu (n'ezie, a siri ike elu na elu kọntaktị elu ga-mma na bonding ike) , nke bụ ihe doro anya n'ihe banyere organic substrates, na nleba anya nke microscopes eletrọn na-egosikwa ịdị elu nke ike nrapado ya.
Uzuzu latex na-agbanwe agbanwe agbanwe na mịlị nke usoro ahụ na steeti agwakọta mmiri, a na-emezi njikọ ahụ site n'ịgbakwunye ntụ ntụ latex. Mgbe ihichachara, ọ na-enye akwa oyi akwa dị larịị na nke siri ike na ike jikọtara ọnụ, ma na-eme ka mmetụta interface nke ájá, gravel na pores dịkwuo mma. , bara ụba na ihe nkiri na interface, nke na-eme ka ntanye tile na-agbanwe agbanwe, na-ebelata modul na-agbanwe agbanwe, na-etinye nrụgide nrụrụ thermal ruo n'ókè dị ukwuu, ma nwee mmiri na-eguzogide mmiri n'oge na-esote, na ihe mkpuchi okpomọkụ na nrụrụ ihe adịghị ekwekọ. . Mgbanwe na ike siri ike nke ntụ ntụ latex nwere ike n'ozuzu ikpe dị ka iko mgbanwe okpomọkụ. Ọ bụrụ na okpomọkụ mgbanwe iko dị n'okpuru ogo 0, ọ na-agbanwewanye. Kedu ụdị ntụ ntụ latex dị mkpa na ngwa ngwa a na-ekpebikarị dịka njirimara arụmọrụ nke ngwaahịa ahụ. Ihe nrapado tile kwesịrị iji ntụ ntụ latex nwere nrapado ka mma.
Oge nzipu: Mar-14-2023