Cov hmoov latex uas tawg tau yog cov emulsion thiab polymer binder uas ua los ntawm dej tshwj xeeb uas ua los ntawm kev txau kom qhuav nrog vinyl acetate-ethylene copolymer ua cov khoom siv tseem ceeb. Tom qab ib feem ntawm cov dej qhuav, cov polymer me me tsim cov zaj duab xis polymer los ntawm kev sib sau ua ke, uas ua haujlwm ua cov binder. Thaum cov hmoov latex uas tawg tau siv ua ke nrog cov zaub mov inorganic gelling xws li cement, nws tuaj yeem hloov kho cov mortar. Cov haujlwm tseem ceeb ntawm cov hmoov latex uas tawg tau yog raws li nram no.
(1) Txhim kho lub zog sib txuas, lub zog tensile thiab lub zog khoov.
Cov hmoov latex uas tawg tau dua tuaj yeem txhim kho lub zog sib txuas ntawm cov mortar. Qhov ntau ntxiv, qhov nqa ntau dua. Lub zog sib txuas siab tuaj yeem tiv thaiv kev ntsws mus rau qee qhov, thiab tib lub sijhawm, kev ntxhov siab los ntawm kev hloov pauv yooj yim rau kev tawg thiab tso tawm, yog li lub zog sib txuas tseem ceeb heev rau kev txhim kho kev tiv thaiv kab nrib pleb. Cov kev tshawb fawb tau qhia tias cov nyhuv synergistic ntawm cellulose ether thiab polymer hmoov pab txhim kho lub zog sib txuas ntawm cov cement mortar.
(2) Txo qhov elastic modulus ntawm cov mortar, yog li ntawd cov brittle cement mortar muaj qee qib ntawm kev ywj pheej.
Tus qauv elastic ntawm cov hmoov latex uas tawg tau dua yog qis, 0.001-10GPa; thaum tus qauv elastic ntawm cov cement mortar siab dua, 10-30GPa, yog li tus qauv elastic ntawm cov cement mortar yuav txo qis nrog rau kev ntxiv cov hmoov polymer. Txawm li cas los xij, hom thiab qhov ntau ntawm cov hmoov polymer kuj muaj feem cuam tshuam rau tus qauv elasticity. Feem ntau, raws li qhov piv ntawm polymer rau cement nce, tus qauv elasticity txo qis thiab qhov deformability nce.
(3) Txhim kho dej tsis kam, alkali tsis kam, abrasion tsis kam thiab cuam tshuam tsis kam.
Cov qauv membrane uas tsim los ntawm cov polymer kaw cov qhov thiab cov kab nrib pleb hauv cov cement mortar, txo qhov porosity ntawm lub cev tawv, thiab yog li txhim kho qhov tsis nkag, tiv taus dej thiab tiv taus te ntawm cov cement mortar. Cov nyhuv no nce ntxiv nrog rau qhov nce ntawm polymer-cement piv. Kev txhim kho ntawm kev tiv taus hnav yog cuam tshuam nrog hom hmoov polymer thiab qhov piv ntawm polymer rau cement. Feem ntau, kev tiv taus hnav zoo dua thaum qhov piv ntawm polymer rau cement nce ntxiv.
(4) Txhim kho qhov fluidity thiab workability ntawm mortar.
(5) Txhim kho qhov kev khaws cia dej ntawm cov mortar thiab txo cov dej evaporation.
Cov polymer emulsion uas tsim los ntawm kev yaj cov hmoov polymer uas rov tawg tau hauv dej yuav tawg mus rau hauv cov mortar, thiab tom qab khov lawm yuav tsim ib zaj duab xis organic tas mus li hauv cov mortar. Zaj duab xis organic no tuaj yeem tiv thaiv kev tsiv teb tsaws chaw ntawm dej, yog li ntawd thiaj li txo qhov poob dej hauv cov mortar thiab ua lub luag haujlwm hauv kev khaws dej.
(6) Txo qhov tshwm sim tawg
Qhov ntev thiab tawv ntawm cov polymer hloov kho cement mortar zoo dua li cov cement mortar ib txwm muaj. Kev ua haujlwm flexural ntau dua 2 npaug ntawm cov cement mortar ib txwm muaj; qhov tawv ntawm qhov cuam tshuam nce ntxiv nrog rau qhov nce ntawm qhov piv ntawm cov polymer cement. Nrog rau qhov nce ntawm cov hmoov polymer ntxiv, qhov cuam tshuam ntawm cov polymer tuaj yeem tiv thaiv lossis ncua kev loj hlob ntawm cov kab nrib pleb, thiab tib lub sijhawm nws muaj cov txiaj ntsig zoo ntawm kev tawg.
Lub sijhawm tshaj tawm: Lub Rau Hli-20-2023