Hmoov nplaum rau phab ntsa sab hauv thiab sab nraud, cov nplaum rau pobzeb, cov tshuaj nplaum rau pobzeb, cov tshuaj nplaum qhuav rau cov pobzeb sib txuas, cov tshuaj nplaum rwb thaiv tsev sab nraud rau phab ntsa sab nraud, cov tshuaj nplaum uas nws tus kheej teeb tsa, cov tshuaj nplaum kho, cov tshuaj nplaum dai kom zoo nkauj, cov tshuaj nplaum tiv thaiv dej rau cov tshuaj nplaum rwb thaiv tsev sab nraud uas qhuav sib xyaw.
Hauv cov tshuaj khib, nws yog los txhim kho qhov brittleness, siab elastic modulus thiab lwm yam tsis muaj zog ntawm cov tshuaj khib cement ib txwm muaj, thiab kom muab cov tshuaj khib cement nrog kev ywj pheej zoo dua thiab lub zog tensile, yog li tiv taus thiab ncua lub sijhawm tsim cov kab nrib pleb ntawm cov tshuaj khib cement. Txij li thaum cov polymer thiab cov tshuaj khib tsim cov qauv sib txuas ua ke, cov yeeb yaj kiab polymer txuas ntxiv tau tsim nyob rau hauv cov qhov hws, uas ua kom muaj zog ntawm kev sib txuas ntawm cov aggregates thiab thaiv qee qhov qhov hws hauv cov tshuaj khib, yog li cov tshuaj khib hloov kho tom qab ua kom tawv zoo dua li cov tshuaj khib cement. Muaj kev txhim kho loj.
Lub luag haujlwm ntawm cov hmoov latex redispersible hauv putty yog feem ntau nyob rau hauv cov hauv qab no:
1. Txhim kho qhov kev nplaum thiab cov khoom siv kho tshuab ntawm putty. Cov hmoov latex uas tawg tau yog cov hmoov nplaum ua los ntawm cov emulsion tshwj xeeb (polymer molecular siab) tom qab txau kom qhuav. Cov hmoov no tuaj yeem tawg sai sai rau hauv emulsion tom qab kov dej, thiab muaj cov khoom zoo ib yam li cov emulsion pib, uas yog, nws tuaj yeem tsim ib zaj duab xis tom qab dej qhuav. Zaj duab xis no muaj kev ywj pheej siab, tiv taus huab cua siab thiab tiv taus ntau yam kev nplaum siab rau cov substrates. Tsis tas li ntawd, cov hmoov latex hydrophobic tuaj yeem ua rau cov mortar tsis muaj dej heev.
2. Txhim kho qhov sib koom ua ke ntawm putty, ua haujlwm zoo heev, ua haujlwm alkali, hnav tsis kam, thiab txhim kho lub zog flexural.
3. Txhim kho qhov tsis muaj dej thiab permeability ntawm putty.
4. Txhim kho qhov kev khaws cia dej ntawm cov putty, ua kom lub sijhawm qhib ntev dua, thiab txhim kho kev ua haujlwm.
5. Txhim kho qhov cuam tshuam ntawm cov putty thiab txhim kho lub zog ntawm putty.
2. Lub luag haujlwm ntawm cov hmoov latex uas tawg tau dua hauv cov nplaum pobzeb yog feem ntau nyob rau hauv cov hauv qab no:
1. Thaum cov cement ntau ntxiv, lub zog qub ntawm cov nplaum pobzeb yuav nce ntxiv. Tib lub sijhawm, lub zog tensile nplaum tom qab muab tso rau hauv dej thiab lub zog tensile nplaum tom qab cua sov laus kuj nce ntxiv. Cov cement yuav tsum siab tshaj 35%.
2. Nrog rau qhov nce ntawm cov hmoov latex uas rov ua dua tshiab, lub zog tensile bond tom qab tsau hauv dej thiab lub zog tensile bond tom qab thermal aging ntawm cov nplais nplaum nce ntxiv raws li, tab sis lub zog tensile bond tom qab thermal aging nce ntxiv pom tseeb.
3. Nrog rau qhov nce ntawm cov cellulose ether, lub zog tensile ntawm cov nplais nplaum tom qab thermal aging nce ntxiv, thiab lub zog tensile nplaum tom qab so hauv dej ua ntej nce thiab tom qab ntawd txo qis. Qhov cuam tshuam zoo tshaj plaws thaum cov ntsiab lus cellulose ether yog li 0.3%.
Thaum siv cov hmoov latex uas tawg tau dua tshiab, peb yuav tsum tau them sai sai rau qhov ntau npaum li cas ntawm kev siv, kom nws thiaj li ua tau nws lub luag haujlwm tiag tiag.
Lub sijhawm tshaj tawm: Lub Rau Hli-05-2023