Tus admixture muaj cov txiaj ntsig zoo ntawm kev txhim kho cov kev ua tau zoo ntawm kev tsim cov tshuaj khib sib xyaw qhuav. Lub redispersible looj hmoov yog ua los ntawm cov polymer tshwj xeeb emulsion tom qab tsuag kom qhuav. Cov hmoov qhuav qhuav yog qee qhov sib npaug ntawm 80 ~ 100mm tau sib sau ua ke. Cov lus no yog soluble hauv dej thiab tsim ib qho ruaj khov me ntsis loj dua li cov thawj emulsion cov lus, uas ua ib zaj duab xis tom qab lub cev qhuav dej thiab ziab.
Kev ntsuas kev hloov kho txawv ua rau cov redispersible looj cov khoom xws li dej tsis kam, huab cua tsis kam thiab hloov tau. Cov hmoov yas tau siv hauv kev sib xyaw ua ke tau txhim kho qhov cuam tshuam, hluav taws xob tsis kam, cov tshuaj tua hluav taws, khoov zog ntawm lub zog ntawm lub tshuaj khib. Sai li sai tau cov khoom siv Maas hais ntxiv nrog cov tshuaj tua kab, thiab cov muaj kua qaub nciab, thiab tib lub sijhawm, ettringite, thiab calcium silicate hydrate gels yog tsim. Cov khoom ruaj khov yog muab tso rau ntawm cov gel thiab cov hloov pauv tsis tau yooj yim. Raws li cov tshuaj tiv thaiv hydr Lub agingregated polymer hais me me sau cov pores.
Redispersible looj hmoov tuaj yeem txhim kho cov khoom cug xws li lub zog polymer, vim tias nws tuaj yeem tsim cov yeeb yaj kiab polymer rau saum npoo ntawm cug cais hais. Muaj qhov hws ntawm cov duab ntawm zaj duab xis, thiab cov nplaim av ntawm cov kab tshuaj khib nyiab, uas txo qhov kev ntxhov siab. Thiab nyob rau hauv kev txiav txim ntawm sab nraud quab yuam, nws yuav ua kom so tsis muaj tawg. Ntxiv rau, lub tshuaj khib ua cov pob txha txhav txhav txhav tom qab lub cev ua ke yog cov haujlwm ntawm kev sib koom ua ke, uas zoo ib yam li cov nqaij ntawm tib neeg lub cev. Lub membrane tsim los ntawm cov polymer tuaj yeem muab piv rau pob qij txha thiab ligaments, thiaj li ua kom muaj kev sib zog thiab yoog raws ntawm pob txha pob khaus. toughness.
Nyob rau hauv polymer-modified coll cug lub kaw lus, txuas ntxiv thiab denser polymer, thiab tib lub sijhawm ua rau tag nrho cov cones concillaries thiab kab noj hniav. Yog li ntawd, cov yeeb yaj kiab polymer tau ua kom tau zoo hloov cov siab thiab nruj nro. Zaj duab xis polymer tuaj yeem ua kom tawg cov kab nrib pleb, thiab txhim kho lub suab sib khi ntawm lub tshuaj khib. Lub xub ntiag ntawm cov hloov pauv yooj yim thiab muaj kuab heev zog txhim kho cov tshuaj khib thiab elasticity ntawm txoj hlua khi thiab kev coj ua kom nruj rau cov pob txha txhav. Thaum lub zog sab nraud yog thov, cov txheej txheem microcrack hais tawm yog ncua vim muaj kev txhim kho kom zoo thiab muaj kev ntxhov siab ntau dua. Lub interwoven polymer cov thawj kuj ua rau muaj kev cuam tshuam nrog coalescence ntawm microcacks rau hauv cov kab nrib pleb. Yog li no, cov neeg recispersible polymer polymer hmoov txhim kho kev ntxhov siab thiab tsis ua tiav hom ntawm cov khoom.
Lub sij hawm ncua: Mar-10-2023