Cov hmoov emulsion thaum kawg tsim cov yeeb yaj kiab polymer, thiab cov txheej txheem tsim los ntawm cov txheej txheem inorganic thiab organic binder yog tsim nyob rau hauv cov mortar kho, uas yog, ib tug nkig thiab tawv pob txha pob txha tsim los ntawm hydraulic cov ntaub ntawv, thiab ib tug zaj duab xis tsim los ntawm redispersible latex hmoov nyob rau hauv qhov sib txawv. thiab khoom nto.hloov tau yooj yim network.Lub zog tensile thiab cohesion ntawm polymer resin zaj duab xis tsim los ntawm cov hmoov latex yog txhim kho.Vim lub elasticity ntawm cov polymer, lub peev xwm deformation yog ntau dua li cov cement pob zeb nruj qauv, qhov deformation kev ua tau zoo ntawm cov mortar yog txhim kho, thiab cov nyhuv ntawm dispersing kev nyuaj siab yog heev txhim kho, yog li txhim kho qhov tawg tsis kam ntawm mortar. .Nrog rau qhov nce ntawm cov ntsiab lus ntawm redispersible latex hmoov, tag nrho cov txheej txheem tsim los ntawm yas.Nyob rau hauv cov ntaub ntawv ntawm high latex hmoov cov ntsiab lus, lub polymer theem nyob rau hauv lub kho mortar maj mam tshaj lub inorganic hydration khoom theem, thiab lub mortar yuav hloov mus rau qhov zoo thiab ua ib tug elastomer, thaum lub hydration khoom ntawm cement yuav ua ib tug "filler".".
Lub zog tensile, elasticity, saj zawg zog thiab sealability ntawm mortar hloov los ntawm redispersible latex hmoov yog tag nrho cov txhim kho.Kev sib xyaw ntawm cov kua roj hmab redispersible tso cai rau cov yeeb yaj kiab polymer (latex zaj duab xis) tsim thiab tsim ib feem ntawm phab ntsa pore, yog li sealing lub siab porosity qauv ntawm lub mortar.Lub latex membrane muaj ib tug self-stretching mechanism uas exerts nro qhov twg nws yog anched rau lub mortar.Los ntawm cov zog sab hauv, cov tshuaj khib nyiab yog khaws cia tag nrho, yog li ua kom lub zog cohesive ntawm lub mortar.Lub xub ntiag ntawm cov khoom siv tau yooj yim thiab cov khoom siv elastic zoo txhim kho qhov yooj thiab elasticity ntawm cov tshuaj khib nyiab.Cov txheej txheem rau kev nce hauv kev ntxhov siab thiab tsis ua haujlwm lub zog yog raws li hauv qab no: thaum siv lub zog, microcracks ncua sij hawm kom txog thaum muaj kev ntxhov siab ntau dua vim kev txhim kho yooj thiab elasticity.Tsis tas li ntawd, cov interwoven polymer domains tseem cuam tshuam cov coalescence ntawm microcracks rau hauv cov kab nrib pleb.Yog li ntawd, cov respersible polymer hmoov txhim kho qhov tsis ua hauj lwm kev nyuaj siab thiab tsis ua hauj lwm strain ntawm cov khoom.
Polymer zaj duab xis nyob rau hauv polymer hloov mortar muaj ib tug tseem ceeb heev nyhuv ntawm hardening mortar.Lub redispersible latex hmoov faib rau ntawm lub interface plays lwm lub luag hauj lwm tseem ceeb tom qab dispersed thiab zaj duab xis-tsim, uas yog ua kom cov adhesion rau cov ntaub ntawv tiv tauj.Nyob rau hauv lub microstructure ntawm cov hmoov polymer hloov cov pobzeb sib txuas mortar thiab pobzeb interface, cov zaj duab xis tsim los ntawm cov polymer ua ib tug choj ntawm cov vuas vitrified uas tsis tshua muaj dej nqus thiab cov cement mortar matrix.Qhov chaw sib cuag ntawm ob cov ntaub ntawv sib txawv yog qhov tshwj xeeb tshaj yog muaj kev pheej hmoo siab rau cov kab nrib pleb shrinkage los tsim thiab ua rau poob ntawm kev sib koom ua ke.Yog li ntawd, lub peev xwm ntawm cov yeeb yaj kiab latex los kho cov kab nrib pleb yog qhov tseem ceeb heev rau cov nplais nplaum.
Post lub sij hawm: Mar-06-2023