Redispersible latex hmoov txhim kho qhov yooj thiab tawg tsis kam ntawm mortar

Tom qab ntxiv cov hmoov latex ntxiv rau hauv cov tshuaj khib nyiab, qhov sib piv-compression thiab nro-compression piv ntawm lub mortar tau zoo heev, uas qhia tau hais tias lub brittleness ntawm lub mortar yog heev txo thiab lub toughness yog zoo heev txhim kho, thiaj li hais tias cov tawg tsis kam. lub mortar tau txhim kho.

Lub redispersed latex hmoov poob dej nyob rau hauv lub mortar los ua ib zaj duab xis, uas tsis tsuas yog sau cov tsis xws luag thiab pores nyob rau hauv lub cement pob zeb, tab sis kuj ua rau cov cement hydration khoom thiab aggregates daim ntawv cog lus nrog ib leeg los tsim ib tug interpenetrating network ntawm polymers. Lub elastic modulus ntawm mortar yog qis dua li ntawm mortar, yog li lub brittleness ntawm lub mortar yog txo. Qhov yooj yim ntawm cov mortar nce qhov siab tshaj plaws deformation txwv thaum lub mortar puas, thiab tuaj yeem nqus tau lub zog xav tau rau kev nthuav dav ntawm qhov tsis xws luag thiab micro-cracks mus rau qhov loj tshaj plaws, kom lub mortar tuaj yeem tiv taus kev ntxhov siab ntau dua ua ntej tsis ua haujlwm. Tsis tas li ntawd, cov yeeb yaj kiab polymer muaj cov txheej txheem ntawm nws tus kheej, thiab cov yeeb yaj kiab polymer muaj kev ua haujlwm ntawm kev sib koom ua ke ntawm cov pob txha pob txha tsim nyob rau hauv mortar tom qab cov cement hydration, uas tuaj yeem ua kom cov elasticity thiab toughness ntawm cov pob txha pob txha. Qhov saum npoo ntawm cov zaj duab xis polymer tsim rau ntawm qhov chaw ntawm cov tshuaj khib nyiab muaj qhov hws, thiab qhov chaw ntawm lub qhov hws yog ntim nrog mortar, thiaj li hais tias qhov kev ntxhov siab concentration yog txo, thiab nws yuav so tsis muaj kev puas tsuaj nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam. Txhim kho qhov yooj thiab elasticity ntawm mortar.