Redispersible latex hmoov muaj zoo redispersibility, redisperses rau hauv emulsion thaum nyob rau hauv kev sib cuag nrog dej, thiab nws cov tshuaj muaj pes tsawg leeg yuav luag zoo tib yam rau thawj emulsion. Ntxiv dispersible emulsion latex hmoov rau cov cement los yog gypsum-raws li qhuav hmoov npaj-mixed mortar tuaj yeem txhim kho ntau yam khoom ntawm mortar, xws li: txhim kho cov cohesion thiab cohesion ntawm cov khoom; txo cov dej nqus thiab elastic modulus ntawm cov khoom; Txhim kho cov khoom siv lub zog Flexural, cuam tshuam tsis kam, hnav tsis kam thiab ua haujlwm ntev; txhim kho kev tsim kho cov khoom siv, thiab lwm yam.
Ntxiv cov hmoov latex rau cov cement mortar yuav tsim ib qho kev hloov pauv tau yooj yim thiab elastic polymer network zaj duab xis, uas yuav txhim kho qhov kev ua tau zoo ntawm cov mortar, tshwj xeeb tshaj yog lub zog tensile ntawm lub mortar yuav zoo tuaj. Thaum siv lub zog sab nraud, vim yog kev txhim kho ntawm tag nrho cov cohesion ntawm mortar thiab soft elasticity ntawm cov polymer, qhov tshwm sim ntawm micro-cracks yuav offset los yog qeeb. Los ntawm kev cuam tshuam ntawm latex hmoov cov ntsiab lus ntawm lub zog ntawm thermal rwb thaiv tsev mortar, nws pom tias lub tensile daim ntawv cog lus lub zog ntawm thermal rwb thaiv tsev mortar nce nrog nce latex hmoov cov ntsiab lus; lub zog flexural thiab compressive zog muaj ib qho kev kawm nrog qhov nce ntawm latex hmoov cov ntsiab lus. Lub degree ntawm kev poob qis, tab sis tseem ua tau raws li qhov yuav tsum tau ua ntawm phab ntsa sab nrauv tiav.
Cov cement mortar tov nrog latex hmoov, nws 28d bonding zog nce nrog nce latex hmoov cov ntsiab lus. Nrog rau qhov nce ntawm cov hmoov latex cov ntsiab lus, lub peev xwm sib txuas ntawm cov cement mortar thiab qub cement pob zeb saum npoo yog txhim kho, uas ua kom nws cov txiaj ntsig tshwj xeeb rau kev kho cov cement pob zeb thiab lwm yam qauv. Ntxiv mus, qhov folding piv ntawm mortar nce nrog qhov nce ntawm latex hmoov cov ntsiab lus, thiab qhov yooj ntawm qhov chaw mortar txhim kho. Nyob rau tib lub sijhawm, nrog kev nce ntawm cov hmoov latex cov ntsiab lus, elastic modulus ntawm mortar txo qis ua ntej thiab tom qab ntawd nce. Ntawm tag nrho, nrog rau qhov nce ntawm cov tshauv tsub zuj zuj piv, cov elastic modulus thiab deformation modulus ntawm mortar yog qis dua cov mortar zoo tib yam.
Txoj kev tshawb nrhiav pom tias nrog kev nce ntawm cov hmoov latex cov ntsiab lus, kev sib koom ua ke thiab dej tuav ntawm lub mortar tau zoo tuaj, thiab kev ua haujlwm tau zoo. Thaum cov hmoov latex nce mus txog 2.5%, kev ua haujlwm ntawm cov mortar tuaj yeem ua tau raws li kev tsim kho. Tus nqi ntawm cov hmoov latex tsis tas yuav tsum siab dhau, uas tsis tsuas yog ua rau EPS rwb thaiv tsev mortar heev ntom thiab muaj fluidity tsawg, uas tsis tsim nyog rau kev tsim kho, tab sis kuj nce nqi ntawm mortar.
Post lub sij hawm: Mar-09-2023