Ntxiv cov polymers tuaj yeem txhim kho qhov tsis nkag tau, tawv, tsis tawg thiab tsis cuam tshuam ntawm cov mortar thiab concrete. Kev nkag tau thiab lwm yam muaj txiaj ntsig zoo. Piv nrog kev txhim kho lub zog flexural thiab lub zog sib txuas ntawm cov mortar thiab txo nws cov brittleness, cov nyhuv ntawm cov hmoov latex rov ua dua rau kev txhim kho kev khaws dej ntawm cov mortar thiab txhim kho nws cov cohesion yog txwv.
Feem ntau, cov hmoov polymer uas tawg tau dua yog ua los ntawm kev siv cov tshuaj emulsion uas twb muaj lawm los ua kom qhuav. Cov txheej txheem yog ua ntej kom tau txais cov polymer emulsion los ntawm kev ua kom cov emulsion polymerization, thiab tom qab ntawd tau txais los ntawm kev ziab kom qhuav. Txhawm rau tiv thaiv kev sib sau ua ke ntawm cov hmoov latex thiab txhim kho kev ua haujlwm ua ntej ziab kom qhuav, qee cov khoom ntxiv feem ntau raug ntxiv, xws li cov tshuaj tua kab mob, cov tshuaj ntxiv ziab kom qhuav, cov tshuaj plasticizers, cov tshuaj defoamers, thiab lwm yam, thaum lub sijhawm ziab kom qhuav, lossis tom qab ziab. Ib tus neeg sawv cev tso tawm raug ntxiv los tiv thaiv cov hmoov sib sau ua ke thaum khaws cia.
Nrog rau kev nce ntxiv ntawm cov ntsiab lus ntawm cov hmoov latex uas rov ua dua tshiab, tag nrho lub kaw lus tsim mus rau yas. Yog tias muaj cov hmoov latex ntau, cov theem polymer hauv cov mortar kho maj mam dhau cov khoom inorganic hydration, cov mortar hloov pauv zoo thiab dhau los ua lub cev elastic, thiab cov khoom hydration ntawm cov cement dhau los ua "filler". . Zaj duab xis tsim los ntawm cov hmoov latex rov ua dua tshiab faib rau ntawm qhov interface ua lub luag haujlwm tseem ceeb, uas yog, txhim kho kev nplaum rau cov ntaub ntawv sib cuag, uas yog qhov tsim nyog rau qee qhov chaw nyuaj rau lo, xws li kev nqus dej tsawg heev lossis cov chaw tsis nqus (xws li cov pob zeb du thiab cov khoom siv cement, cov phaj hlau, cov cib homogeneous, cov cib vitrified, thiab lwm yam) thiab cov khoom siv organic (xws li EPS boards, yas, thiab lwm yam) yog qhov tseem ceeb tshwj xeeb. Vim tias kev sib txuas ntawm cov nplaum inorganic rau cov ntaub ntawv yog ua tiav los ntawm lub hauv paus ntsiab lus ntawm kev siv tshuab, uas yog, cov hydraulic slurry nkag mus rau hauv qhov sib txawv ntawm lwm cov ntaub ntawv, maj mam khov, thiab thaum kawg txuas cov mortar rau nws zoo li tus yuam sij embedded hauv lub xauv. Qhov saum npoo ntawm cov khoom siv, rau qhov saum npoo nyuaj rau kev sib txuas, tsis tuaj yeem nkag mus rau hauv sab hauv ntawm cov khoom siv los tsim kom muaj kev sib txuas zoo, yog li ntawd cov mortar nrog tsuas yog cov nplaum inorganic tsis sib txuas zoo rau nws, thiab cov txheej txheem sib txuas ntawm cov polymer txawv. , Cov polymer sib txuas rau qhov saum npoo ntawm lwm cov ntaub ntawv los ntawm lub zog intermolecular, thiab tsis nyob ntawm qhov porosity ntawm qhov saum npoo (ntawm chav kawm, qhov saum npoo ntxhib thiab qhov chaw sib cuag ntxiv yuav txhim kho qhov kev sib txuas).
Lub sijhawm tshaj tawm: Lub Peb Hlis-07-2023