Putty yog cov khoom siv dav siv hauv tsev kho kom zoo nkauj, thiab nws qhov zoo ncaj qha cuam tshuam rau lub neej kev pab cuam thiab cov nyhuv zoo nkauj ntawm phab ntsa txheej. Bonding lub zog thiab dej tsis kam yog cov cim tseem ceeb rau kev ntsuas kev ua haujlwm ntawm putty.Redispersible latex hmoov, raws li cov organic polymer hloov khoom siv, ua lub luag haujlwm tseem ceeb hauv kev txhim kho putty kev ua tau zoo.
1. Mechanism ntawm kev txiav txim ntawm redispersible latex hmoov
Redispersible latex hmoov yog cov hmoov tsim los ntawm cov tshuaj tsuag kom qhuav ntawm polymer emulsion. Nws tuaj yeem rov ua emulsify los tsim kom muaj qhov ruaj khov polymer dispersion system tom qab hu rau dej, uas ua lub luag haujlwm hauv kev txhim kho lub zog sib txuas thiab yooj yim ntawm putty. Nws lub luag haujlwm tseem ceeb suav nrog:
Txhim kho kev sib raug zoo zog: Redispersible latex hmoov tsim ib zaj duab xis polymer thaum lub sij hawm ziab ntawm putty, thiab synergizes nrog inorganic gelling cov ntaub ntawv los txhim kho lub interfacial bonding peev xwm.
Txhim khu kev tiv thaiv dej: Latex hmoov tsim ib lub network hydrophobic hauv cov qauv putty, txo cov dej nkag thiab txhim kho dej tsis kam.
Txhim kho kev yooj yim: Nws tuaj yeem txo qhov brittleness ntawm putty, txhim kho deformation peev xwm, thiab txo qhov kev pheej hmoo ntawm cov kab nrib pleb.
2. Kev sim kawm
Cov ntaub ntawv xeem
Cov khoom siv hauv paus: cement-based putty hmoov
Redispersible latex hmoov: ethylene-vinyl acetate (EVA) copolymer latex hmoov
Lwm yam additives: thickener, dej tuav tus neeg saib xyuas, muab tub lim, thiab lwm yam.
Kev sim
Putties nrog sib txawv redispersible latex hmoov ntau npaum li cas (0%, 2%, 5%, 8%, 10%) tau npaj raws li, thiab lawv cov kev sib raug zoo zog thiab dej tsis kam raug kuaj. Lub zog sib txuas tau txiav txim siab los ntawm kev ntsuas rub tawm, thiab qhov ntsuas dej tsis kam raug ntsuas los ntawm kev tuav lub zog tom qab tso rau hauv dej rau 24 teev.
3. Cov txiaj ntsig thiab kev sib tham
Cov nyhuv ntawm redispersible latex hmoov rau kev sib khi lub zog
Cov txiaj ntsig kev sim qhia tau hais tias nrog qhov nce ntawm RDP ntau npaum li cas, lub zog sib txuas ntawm putty qhia tau hais tias qhov sib txawv ntawm thawj qhov nce thiab tom qab ntawd ruaj khov.
Thaum RDP ntau npaum li cas los ntawm 0% mus rau 5%, lub zog sib txuas ntawm putty yog qhov zoo dua qub, vim tias cov yeeb yaj kiab polymer tsim los ntawm RDP txhim kho lub zog sib txuas ntawm cov khoom siv hauv paus thiab cov putty.
Txuas ntxiv mus nce RDP mus rau ntau dua 8%, kev loj hlob ntawm kev sib raug zoo ntawm kev sib raug zoo zoo li tiaj tus, thiab txawm tias me ntsis txo qis ntawm 10%, uas tej zaum yuav yog vim RDP ntau dhau yuav cuam tshuam rau cov qauv nruj ntawm putty thiab txo lub zog sib cuam tshuam.
Cov nyhuv ntawm redispersible latex hmoov rau dej kuj
Cov txiaj ntsig kev ntsuas dej tsis zoo qhia tau tias tus nqi ntawm RDP muaj qhov cuam tshuam loj rau cov dej tsis kam ntawm putty.
Lub zog sib txuas ntawm putty yam tsis muaj RDP poob qis heev tom qab soaking hauv dej, qhia cov dej tsis zoo.
Qhov sib ntxiv ntawm qhov tsim nyog ntawm RDP (5% -8%) ua rau cov putty tsim cov organic-inorganic composite qauv, txhim kho cov dej tsis kam, thiab txhim kho lub zog tuav tus nqi tom qab 24 teev ntawm immersion.
Txawm li cas los xij, thaum RDP cov ntsiab lus ntau dua 8%, kev txhim kho ntawm cov dej tsis kam txo qis, uas tej zaum yuav yog vim muaj cov organic ntau dhau los txo qhov muaj peev xwm tiv thaiv hydrolysis ntawm putty.
Cov ntsiab lus hauv qab no tuaj yeem tau txais los ntawm kev tshawb nrhiav kev sim:
Tus nqi tsim nyog ntawmredispersible latex hmoov(5% -8%) tuaj yeem txhim kho lub zog sib txuas thiab dej tsis kam ntawm putty.
Kev siv ntau dhau ntawm RDP (> 8%) tuaj yeem cuam tshuam rau cov qauv nruj ntawm putty, ua rau qeeb lossis txo qis hauv kev txhim kho kev sib raug zoo ntawm lub zog thiab dej tsis kam.
Qhov kev noj zaub mov zoo yuav tsum tau ua kom zoo raws li qhov tshwj xeeb daim ntawv thov scenario ntawm putty kom ua tiav qhov zoo tshaj plaws sib npaug ntawm kev ua tau zoo thiab tus nqi.
Post lub sij hawm: Mar-26-2025