Upfu hwelatex hunosanganiswa nemamwe ma "inorganic binders" (akadai sesimende, slaked lime, gypsum, nezvimwewo) uye ma "aggregates" akasiyana-siyana, ma "fillers" nezvimwe zvinowedzera (akadai semethyl hydroxypropyl cellulose ether, starch ether, lignocellulose, hydrophobic agent, nezvimwewo) kuti zvisanganiswe kuti pave ne "dry-mixed mortar". Kana "dry-mixed mortar" yawedzerwa mumvura yobva yakurungwa, "latex powder particles" inoparadzirwa mumvura pasi pesimba re "hydrophilic protective colloid" uye "mechanical shear". Nguva inodiwa kuti "normal redispersible latex powder" ipararire ipfupi kwazvo, uye iyi "redispersion time index" ndiyo inonyanya kukosha pakuongorora kunaka kwayo. Pakutanga kwekusanganisa, "latex powder" yatotanga kukanganisa rheology uye kushanda kwe "mortar".
Nekuda kwehunhu hwakasiyana uye shanduko dzehupfu hwelatex hwakakamurwa, mhedzisiro iyi yakasiyanawo, mimwe ine mhedzisiro inobatsira kuyerera, uye mimwe ine mhedzisiro inowedzera yethixotropy. Maitiro esimba rayo anobva pazvinhu zvakawanda, kusanganisira simba rehupfu hwelatex pakubatana kwemvura panguva yekupararira, simba rehupfu hwelatex mushure mekupararira, simba rekudzivirira colloid, uye simba resimende nemabhande emvura. Simba rinosanganisira kuwedzera kwehuwandu hwemhepo mumota uye kupararira kwemabubble emhepo, pamwe ne simba rezvinowedzera zvayo uye kudyidzana nezvimwe zvinowedzera. Naizvozvo, sarudzo yakagadzirirwa uye yakakamurwa yehupfu hwelatex hunokamurwa inzira yakakosha yekuchinja mhando yechigadzirwa. Pfungwa inowanzoonekwa ndeyekuti hupfu hwelatex hunokamurwa hunowanzo kuwedzera huwandu hwemhepo mumota, nokudaro huchizora kuvaka kwemota, uye simba rehupfu hwelatex, kunyanya hunodzivirira colloid, kumvura kana yapararira. Kuwedzera kwehuwandu kunobatsira kuvandudza kubatana kwemota yekuvaka, nokudaro kuvandudza kushanda kwemota. Zvadaro, dhaka rakanyorova rine latex powder dispersion rinoiswa pamusoro pebasa. Nekudzikira kwemvura pamatanho matatu - kunyudzwa kwebase layer, kushandiswa kwe hydration ye simende, uye volatilization yemvura yepamusoro kuenda mumhepo, resin particles inosvika zvishoma nezvishoma, ma interfaces anosangana zvishoma nezvishoma, uye pakupedzisira anova continuous polymer film. Maitiro aya anonyanya kuitika muma pores edhaka uye pamusoro pe solid.
Zvinofanira kusimbiswa kuti kuitira kuti maitiro aya asadzoreki, ndiko kuti, kana firimu repolymer rikasangana nemvura zvakare, harizoparadzirwe zvakare, uye colloid inodzivirira yeupfu hwelatex hunonyungudika inofanira kuparadzaniswa nehurongwa hwepolymer film. Izvi hazvisi dambudziko muhurongwa hwe alkaline cement mortar, nekuti ichasanganiswa ne alkali inogadzirwa ne hydration ye cement, uye panguva imwe chete, kunyungudika kwezvinhu zvakaita se quartz kuchaiparadzanisa zvishoma nezvishoma nehurongwa, pasina dziviriro ye hydrophilicity. Colloids, isinganyungudike mumvura uye inoumbwa nekupararira kamwe chete kweupfu hwelatex hunonyungudika, inogona kushanda kwete chete mumamiriro akaoma, asiwo mumamiriro ekunyudzwa mumvura kwenguva refu. Mumasystem asiri e alkaline, akadai se gypsum systems kana masystem ane fillers chete, nekuda kwechimwe chikonzero colloid inodzivirira ichiripo mufirimu rekupedzisira re polymer, izvo zvinokanganisa kuramba kwemvura kwefirimu, asi nekuda kwekuti masystem aya haashandiswi Kana yakanyudzwa mumvura kwenguva refu, uye polymer ichine hunhu hwayo hwemakanika, haikanganisi kushandiswa kwe latex powder inonyungudika zvakare mumasystem aya.
Nekuumbwa kwefirimu rekupedzisira repolymer, sisitimu yefuremu inoumbwa nezvinhu zvisingasanganisike uye zveorganic inoumbwa mumota yakacheneswa, ndiko kuti, zvinhu zvehydraulic zvinoumba furemu yakapfava uye yakaoma, uye upfu hwelatex hunonyungudika hunogadzira firimu pakati pemukana nepamusoro pakasimba. Kubatana kunochinjika. Rudzi urwu rwekubatana runogona kufungidzirwa serwakabatana nemapfupa akaomarara nezvitubu zvidiki zvakawanda. Sezvo simba rekudhonza refirimu repolymer resin rinoumbwa neupfu hwelatex rinowanzo kuve rakakwirira kupfuura rezvinhu zvehydraulic, simba remota pachayo rinogona kuwedzerwa, ndiko kuti, kubatana kunovandudzwa. Sezvo kuchinjika uye kuchinjika kwepolymer kwakanyanya kupfuura kwechimiro chakasimba senge simende, kuchinjika kwemota kunovandudzwa, uye mhedzisiro yekupararira kwekumanikidzwa inovandudzwa zvikuru, nokudaro ichivandudza kuramba kwemota kutsemuka.
Nguva yekutumira: Kurume-07-2023