Ntxiv 2% mus rau 3% ntawm redispersible latex hmoov tuaj yeem txhim kho qhov hnav tsis kam ntawm tus kheej-leveling mortar, uas tuaj yeem ua tau raws li 28d hnav tsis kam ≤ 0.59 teev hauv tus qauv. Cov polymer disperses nyob rau hauv mortar thiab tom qab ntawd ua ib zaj duab xis, nyob rau hauv lub pores ntawm slurry thiab interacts nrog cov cement hydration cov khoom los tsim ib tug peb-seem network qauv, uas ua rau cov mortar qauv ntau compact. Cov yeeb yaj kiab polymer hloov pauv tau pab daws qhov kev ntxhov siab sab hauv ntawm cov mortar, txo cov kev ntxhov siab, thiab txo cov cim ntawm microcracks, thiab cov yeeb yaj kiab polymer no tsis tsuas yog ua lub luag haujlwm hydrophobic tab sis kuj tsis thaiv cov capillary, kom cov khoom siv. muaj zoo hydrophobicity thiab breathability. Nyob rau tib lub sijhawm, vim cov nyhuv sealing tshwm sim los ntawm cov yeeb yaj kiab polymer, cov khoom siv impermeability rau ya raws, tshuaj tiv thaiv, khov-thaw tsis kam, thiab kav ntev tau zoo heev, thiab khoov lub zog, tawg tsis kam, adhesion zog, thiab elasticity ntawm cov mortar yog txhim kho. Thiab toughness, thiab thaum kawg tuaj yeem zam qhov shrinkage cracking ntawm mortar.
Kev sim tau pom tias qhov pib fluidity ntawm tuab-txheej gypsum-based self-leveling mortar nce ua ntej thiab tom qab ntawd txo qis nrog qhov nce ntawm cov hmoov latex. Yog vim li cas yog tias cov hmoov latex muaj qee yam viscosity hauv cov dej yaj. Lub peev xwm raug tshem tawm ntawm slurry rau cov muab tub lim yog txhim kho, uas yog qhov zoo rau kev khiav ntawm slurry; Thaum cov hmoov latex tseem nce ntxiv, qhov nce hauv qhov viscosity ntawm slurry ua rau muaj kev nce hauv cov viscosity ntawm slurry, thiab fluidity qhia tau hais tias ib qho kev poob qis. Tus nqi ntawm cov hmoov latex yuav luag tsis cuam tshuam rau 20-min fluidity ntawm mortar. Raws li cov organic binder, latex hmoov nyob ntawm qhov evaporation ntawm cov dej hauv slurry, thiab cov zaj duab xis tsim ib daim ntawv cog lus lub zog, thiab gypsum puag yog tus kheej-leveling nyob rau hauv qhuav lub xeev. Cov dej hauv cov mortar evaporates, thiab cov hmoov latex tuaj yeem tsim cov yeeb yaj kiab txuas ntxiv, uas muaj zog cohesive zoo. Lub zog qhuav ntawm gypsum-based self-leveling mortar nce nrog qhov nce ntawm cov latex hmoov cov ntsiab lus. Nyob rau hauv gypsum-based self-leveling mortar tsis muaj latex hmoov, muaj ntau tus pas nrig-zoo li tus thiab columnar dihydrate gypsum crystals thiab tsis tu ncua muab tub lim dihydrate gypsum crystals thiab nruab nrab ntawm dihydrate gypsum crystals thiab muab tub lim. Ua ke ua ke los ua gypsum-based self-leveling mortar tsim lub zog, thiab gypsum-based self-leveling mortar tov nrog redispersible latex hmoov, cov hmoov latex tsim ib qho kev sib txuas hauv gypsum-based self-leveling mortar, thiab dihydrate gypsum crystals thiab fillers, crystals Ib tug organic choj yog tsim los ntawm cov siv lead ua thiab dihydrate gypsum siv lead ua, thiab ib tug organic zaj duab xis yog tsim nyob rau hauv lub dihydrate gypsum siv lead ua los qhwv thiab txuas cov sib tshooj ntawm cov dihydrate gypsum muaju, yog li ua kom lub cohesion thiab cohesion. ntawm gypsum-based self-leveling mortar thiab txhim kho Lub zog ntawm gypsum-based self-leveling mortar Lub latex hmoov muaj cov yeeb yaj kiab tsim cov khoom hauv cov mortar, uas tuaj yeem txhim kho kev sib koom ua ke thiab kev sib koom ua ke ntawm cov tshuaj khib nyiab qhuav. Kev tsim kom muaj kev sib raug zoo ntawm cov muab tub lim txhim kho kev sib koom ua ke ntawm cov dihydrate gypsum crystals thiab cov muab tub lim, yog li txhim kho lub zog ntawm gypsum-based self-leveling mortar macroscopically.
Lub sij hawm xa tuaj: Plaub Hlis-10-2023