Emulsion thiab redispersible looj quav huv si tensile lub zog, lawv tau siv los ua cov khoom sib xyaw ua ke rau cov khoom sib xyaw ua ke rau cov khoom siv sib txawv los txhim kho lub zog kev ua yeeb yam ntawm cug.
Los ntawm kev soj ntsuam microstructure ntawm cov khoom siv polymer-xis mas muaj peev xwm ua yeeb yaj kiab lub qhov muag, thiab ua ib feem ntawm lub qhov rooj, thiab ua rau lub zog cug tag nrho los ntawm kev quab yuam sab hauv, uas txhim kho lub zog sab hauv ntawm lub cug. Lub zog polymer, yog li kev txhim kho qhov tsis ua haujlwm ntawm cug cug thiab nce qhov kawg nkaus.
Lub microstructure ntawm lub polymer nyob rau hauv lub tshuaj khib tsis tau hloov rau lub sijhawm ntev, thiab muaj kev ruaj ntseg sib luag, flexural thiab zoo hydrophlomicity. Tus qauv tsim qauv ntawm redispersible looj cov ntaub ntawv sib txuas ntawm ib sab, thiab cov pobzeb ntawm ib sab, thiab ntawm qhov tod tes, cov polymer hauv Cov tshuaj khib tshiab nce cov huab cua cov ntsiab lus ntawm cov txheej txheem kev teeb tsa, thiab tom qab ntawd thaum lub teeb tsa thiab shrinkage ntawm cov cement hauv cov phau ntawv sau, uas yuav pab txhawb Txhawm rau kev txhim kho cov nyiaj hauv lub zog muaj kev pab zoo dua.
Ntxiv cov refispersible looj lub zog tau txhim kho cov khoom sib xyaw thiab cov tshuaj tsw qab ntawm cov khoom noj kom xis nyob rau hauv cov pores thiab capillaries Cov. Cov yeeb yaj kiab sab hauv yog tsim thiab nthuav dav adsorbed nyob rau saum npoo ntawm substrate, yog li ua kom muaj kev sib tw zoo ntawm cov khoom qab zib cov khoom siv thiab cov substrate.
Qhov ua tau zoo ntawm cov hmoov yas ntawm cov kev ua tau zoo ntawm cov tshuaj khib yog vim qhov tseeb ntawm cov hmoov av zoo yog cov pab pawg polymular. Thaum cov hmoov txhuv nplej rau cov eps, ntu tsis yog-polymer yuav tshwm sim ntawm lub cev nqaij daim tawv ntawm EPS. Cov pawg polar hauv cov polymer yog kev taw qhia sab nraud ntawm EPS hais, kom cov EPS hais tawm ntawm hydrophibicity rau hydrophilicity. Vim kev hloov kho ntawm cov tog eps los ntawm cov hmoov yas latex, nws daws cov teeb meem uas EPS cov lus yog yooj yim rau dej. Ntab, qhov teeb meem ntawm cov loj ntawm cov tshuaj khib. Nyob rau lub sijhawm no, thaum ua kom tiav, cov pab pawg ua ke sib xyaw, cov khoom sib xyaw ua ke thiab sib xyaw ua ke, kom ua haujlwm ntawm EPS txhim kho. Qhov no yog xav nyob rau hauv qhov tseeb tias EPS yooj yim wetted los ntawm cov cement muab tshuaj txhuam, thiab kev sib raug zoo ntawm ob leeg tau zoo dua.
Lub sij hawm ncua: Mar-18-2023