Ọrụ nke ntụ ntụ latex na-agbanwegharị na ngwa agha
Ugbu a, dị ka dị iche iche pụrụ iche akọrọ ntụ ntụ ngwa agha ngwaahịa na-eji nwayọọ nwayọọ na-anabata na ọtụtụ ebe, ndị mmadụ na ụlọ ọrụ na-aṅa ntị redispersible latex ntụ ntụ dị ka otu n'ime isi ihe mgbakwunye nke pụrụ iche akọrọ ntụ ntụ ngwa agha, otú dị iche iche àgwà ji nwayọọ nwayọọ pụta. uzuzu latex, multi-polymer latex uzuzu, resin latex ntụ ntụ, mmiri na-adabere na resin latex ntụ ntụ na ihe ndị ọzọ.
The microscopic Njirimara na macroscopic arụmọrụ nkentụ ntụ latex redisperablena ngwa agha na-ejikọta, na ụfọdụ atumatu a na-enyocha. The edinam usoro nke redispersible latex ntụ ntụ Redispersible latex ntụ ntụ bụ ịkwadebe polymer emulsion n'ime ngwakọta nke a pụrụ iji maka ịgba ihicha site na-agbakwụnye dị iche iche mgbakwunye, wee tinye echebe colloid na mgbochi caking gị n'ụlọnga na-eme ka polymer ụdị mgbe ịgba ihicha. ntụ ntụ na-eru n'efu na-agbanwegharị na mmiri. A na-ekesa ntụ ntụ latex a na-emegharị emegharị n'ime ngwa ngwa akọrọ kpalitere nke ọma. Mgbe ejiri mmiri kpoo ngwa agha ahụ, a na-atụgharị polymer ntụ ntụ n'ime slurry ọhụrụ a gwakọtara na emulsified ọzọ; n'ihi hydration nke ciment, ikuku evaporation na absorption nke isi oyi akwa, pores n'ime ngwa agha ahụ bụ n'efu. The oriri na-aga n'ihu nke mmiri na ike alkaline gburugburu ebe obibi na-enye site ciment na-eme ka latex ahụ kpọrọ nkụ na-etolite a mmiri na-adịghị ike na-aga n'ihu ihe nkiri na ngwa agha. Ihe nkiri a na-aga n'ihu na-etolite site na njikọ nke otu ihe ahụ gbasasịrị na emulsion n'ime ahụ. Ọ bụ ịdị adị nke ihe nkiri latex ndị a na-ekesa na ngwa agha gbanwetụrụ polymer nke na-enyere polymer modified ngwa agha nweta njirimara nke ngwa ngwa ciment siri ike enweghị ike inwe: n'ihi usoro ịgbatị onwe ya nke ihe nkiri latex, enwere ike itinye ya na ntọala ma ọ bụ ngwa agha Na interface nke polymer gbanwetụrụ ngwa agha na isi, mmetụta a nwere ike imeziwanye njikọta na ụdị ntọala dị iche iche dị ka ihe ndabere dị iche iche nke ụdị ntọala ahụ. taịlị seramiiki dị elu na mbadamba polystyrene; Mmetụta a n'ime ngwa agha ahụ nwere ike idobe ya n'ozuzu ya, n'ikwu ya n'ụzọ ọzọ, ike na-ejikọta ọnụ nke ngwa agha na-eme ka ọ dịkwuo mma, na ka ọnụ ọgụgụ nke redispersible latex ntụ ntụ na-abawanye, ike njikọ dị n'etiti ngwa agha na isi ihe na-eme ka ọ dịkwuo mma; Elu Ọnụnọ nke ngalaba polymer na-agbanwe agbanwe na nke ukwuu mere ka arụmọrụ njikọ na mgbanwe nke ngwa agha dịkwuo mma, ebe modul nke ngwa agha n'onwe ya na-ebelata nke ukwuu, na-egosi na ọ na-eme ka ọ dịkwuo mma. Ihe nkiri latex hụrụ n'ime ngwa agha na polymer gbanwetụrụ ngwa ngwa ciment n'afọ dị iche iche. A na-ekesa ihe nkiri a na-emepụta site na latex n'ọnọdụ dị iche iche na ngwa agha, gụnyere isi-mortar interface, n'etiti pores, gburugburu mgbidi pore, n'etiti ngwaahịa hydration ciment, gburugburu cement particles, gburugburu mkpokọta, na mkpokọta-mortar interface. Ụfọdụ ihe nkiri latex na-ekesa na ngwa agha nke a gbanwere site na ntụ ntụ polymer na-agbanwe agbanwe na-eme ka o kwe omume ịnweta ngwa ngwa simenti siri ike na-enweghị ike ịnweta: ihe nkiri latex nwere ike imechi mgbawa mkpọda na ebe mgbaba ngwa ngwa ma kwe ka mgbawa mgbawa ahụ gwọọ. Melite ikike nke ngwa agha. Mmelite nke ike jikọrọ ọnụ nke ngwa agha: Ọnụnọ nke ngalaba polymer na-agbanwe agbanwe na nke ukwuu na-eme ka mgbanwe na ngbanwe nke ngwa agha ahụ dịkwuo mma, na-enye njikọ na omume siri ike na ọkpụkpụ siri ike. Mgbe etinyere ike, a na-egbu oge nguzobe microcrack ruo mgbe a ga-enweta nrụgide dị elu n'ihi mgbanwe dị mma na ngbanwe. Ngalaba polymer kpara akpa na-egbochikwa njikọta nke microcracks n'ime oghere mgbape. Ya mere, ntụ ntụ latex na-agbanwe agbanwe na-abawanye nrụgide ọdịda na ọdịda ọdịda nke ihe. Mgbanwe nke polymer na ngwa ngwa ciment na-eme ka ha abụọ nweta mmetụta nkwado, nke mere na a pụrụ iji ụrọ a gbanwere polymer mee ihe n'ọtụtụ oge pụrụ iche. Tụkwasị na nke a, n'ihi uru nke akọrọ-mix ngwa agha na njikwa mma, ọrụ ihe owuwu, nchekwa na nchekwa gburugburu ebe obibi, redispersible latex powder na-enye ụzọ ọrụ nkà na ụzụ dị irè maka ịmepụta ngwaahịa ngwa ngwa pụrụ iche.
Dabere na usoro eji eme ntụ ntụ polymer redispersible na ngwa agha, anyị mere ụfọdụ nnwale atụnyere iji nyochaa arụmọrụ nke ihe ọzọ dị ugbu a n'ahịa, nke a makwaara dị ka ntụ ntụ latex, na ngwa agha. 1. Ihe eji eme ihe na ihe nyocha 1.1 ciment ihe eji eme ihe: Conch Brand 42.5 Ordinary Portland Cement Sand: River Sand, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Ether: Domestic Viscosity 30000-35000mpas (Brookfield 25000mpas) (Brookfield Viscometer) Calcium Powder, Viscometer, Calcium, Viscometer, Calcium, Viscometer, calcium . ntụ ntụ, fineness bụ 325 mesh Latex ntụ ntụ: VAE dabeere redispersible latex ntụ ntụ, Tg uru bụ -7 ° C, ebe a na-akpọ: redispersible latex ntụ ntụ Wood fiber: ZZC500 nke JS ụlọ ọrụ Commercially available latex powder: a commercially available latex powder, called here: commercially available latex powder 97. The mechanical standard test form is: Laboratory test form is: Laboratory standard test ± 2. (50±5)%, nwalee ọsọ ifufe na-ekesa na mpaghara erughị 0.2m/s. Bọọdụ polystyrene gbasaa agbatị, njupụta buru ibu bụ 18kg / m3, bee n'ime 400 × 400 × 5mm. 2. Nsonaazụ ule: 2.1 ike ịgbatị n'okpuru oge ọgwụgwọ dị iche iche: Emere ihe nlele ahụ dịka usoro nnwale nke ike njigide ngwa agha na JG149-2003. Usoro ọgwụgwọ ebe a bụ: mgbe emechara ihe nlele ahụ, a na-agwọ ya otu ụbọchị n'okpuru ọnọdụ ọkọlọtọ nke ụlọ nyocha, wee tinye ya na oven 50-degree. Izu mbụ nke ule bụ: tinye ya na oven dị ogo 50 ruo ụbọchị nke isii, wepụ ya, tinye isi ule na-adọta , N'ụbọchị nke asaa, a nwalere otu ike nke ịdọrọ ike. Nnwale n'izu nke abụọ bụ: tinye ya na oven dị ogo 50 ruo ụbọchị nke iri na atọ, wepụ ya, rapagidesi ike n'isi ule, ma nwalee otu ike ndọpụ n'ụbọchị nke iri na anọ. Izu nke atọ, izu nke anọ. . . were gabazie.
Site na nsonaazụ ya, anyị nwere ike ịhụ na ike nkentụ ntụ latex redisperablena ngwa agha na-abawanye ma na-edobe ka oge na ọnọdụ okpomọkụ dị elu na-abawanye, nke bụ otu ihe ahụ dị ka ihe nkiri latex na redispersible latex powder ga-etolite na ngwa agha Theory na-agbanwe agbanwe, ogologo oge nchekwa ahụ, ihe nkiri latex nke latex ntụ ntụ ga-eru otu njupụta, si otú ahụ na-eme ka adhesion nke ngwa agha ahụ gaa na isi ala pụrụ iche nke bọọdụ EPS. N'ụzọ megidere nke ahụ, latex powder 97 na-ere ahịa nwere ike dị ala ka a na-echekwa ya na ọnọdụ okpomọkụ dị elu maka ogologo oge. Ike mbibi nke uzuzu latex na-agbasasị na bọọdụ EPS ka dị otu, mana ike mbibi nke latex powder 97 dị na bọọdụ EPS na-akawanye njọ.
N'ikwu okwu n'ozuzu, uzuzu latex na-ere ahịa na redispersible latex ntụ ntụ nwere usoro dị iche iche nke ime ihe, na redispersible latex ntụ ntụ, nke na-emepụta ihe nkiri n'akụkụ dị iche iche nke ngwa agha ahụ, na-eme ihe dị ka ihe gelling nke abụọ iji meziwanye ihe anụ ahụ nke ngwa agha ahụ. Usoro nke omume nke arụmọrụ adịghị ekwekọ.
Oge nzipu: Eprel-25-2024