Cov hmoov emulsion thaum kawg tsim cov zaj duab xis polymer, thiab ib lub kaw lus tsim los ntawm cov qauv inorganic thiab organic binder yog tsim nyob rau hauv cov mortar kho, uas yog, ib lub pob txha brittle thiab tawv tsim los ntawm cov ntaub ntawv hydraulic, thiab ib zaj duab xis tsim los ntawm cov hmoov latex redispersible hauv qhov sib txawv thiab qhov chaw khov kho. flexible network. Lub zog tensile thiab cohesion ntawm cov zaj duab xis polymer resin tsim los ntawm cov hmoov latex tau txhim kho. Vim yog qhov yooj ywm ntawm cov polymer, lub peev xwm deformation yog siab dua li ntawm cov pob zeb cement pob zeb rigid qauv, qhov kev ua tau zoo deformation ntawm cov mortar tau txhim kho, thiab cov nyhuv ntawm kev ntxhov siab dispersing tau txhim kho zoo heev, yog li txhim kho qhov tawg tsis kam ntawm cov mortar. Nrog rau kev nce ntawm cov ntsiab lus ntawm cov hmoov latex redispersible, tag nrho lub kaw lus tsim mus rau yas. Nyob rau hauv cov ntaub ntawv ntawm cov hmoov latex siab, cov theem polymer hauv cov mortar kho maj mam dhau qhov inorganic hydration khoom theem, thiab cov mortar yuav dhau los ua qhov kev hloov pauv zoo thiab dhau los ua elastomer, thaum cov khoom hydration ntawm cement dhau los ua "filler". ".
Lub zog tensile, elasticity, flexibility thiab sealability ntawm cov mortar hloov kho los ntawm cov hmoov latex redispersible tau zoo dua. Kev sib xyaw ntawm cov hmoov latex redispersible tso cai rau cov zaj duab xis polymer (latex zaj duab xis) los tsim thiab ua ib feem ntawm phab ntsa pore, yog li kaw cov qauv porosity siab ntawm cov mortar. Lub membrane latex muaj lub tshuab ncab nws tus kheej uas ua rau muaj kev nruj qhov twg nws tau anchored rau cov mortar. Los ntawm cov zog sab hauv no, cov mortar raug tswj hwm tag nrho, yog li ua rau lub zog sib koom ua ke ntawm cov mortar. Qhov muaj cov polymers uas yooj ywm thiab elastic heev txhim kho qhov yooj ywm thiab elasticity ntawm cov mortar. Lub tshuab rau kev nce hauv kev ntxhov siab thiab kev ua tsis tiav yog raws li nram no: thaum muaj zog siv, microcracks raug ncua kom txog thaum muaj kev ntxhov siab ntau dua vim muaj kev ywj pheej thiab elasticity zoo dua. Tsis tas li ntawd, cov polymer domains interwoven kuj cuam tshuam kev sib koom ua ke ntawm microcracks rau hauv cov kab nrib pleb. Yog li ntawd, cov hmoov polymer redispersible txhim kho kev ntxhov siab thiab kev ua tsis tiav ntawm cov khoom siv.
Cov zaj duab xis polymer hauv cov polymer hloov kho mortar muaj qhov cuam tshuam tseem ceeb heev rau cov mortar tawv. Cov hmoov latex uas rov tawg ua dua tshiab faib rau ntawm qhov sib txuas ua lub luag haujlwm tseem ceeb tom qab raug tawg thiab tsim zaj duab xis, uas yog kom ua rau cov khoom sib txuas ntxiv. Hauv cov qauv me me ntawm cov hmoov polymer hloov kho vuas vov tsev thiab cov vuas vov tsev sib txuas, zaj duab xis tsim los ntawm polymer tsim ib lub choj ntawm cov vuas vitrified nrog kev nqus dej tsawg heev thiab cov cement mortar matrix. Thaj chaw sib cuag ntawm ob yam khoom sib txawv yog thaj chaw 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 zaj duab xis latex los kho cov kab nrib pleb shrinkage yog qhov tseem ceeb heev rau cov nplaum vuas vov tsev.
Lub sijhawm tshaj tawm: Lub Peb Hlis-06-2023