Redispersible polymer hmoov (RDP) yog ib tug copolymer ntawm vinyl acetate thiab ethylene, feem ntau yog siv los ua ib tug khi hauv cov ntaub ntawv siv. Nws txhim kho lub zog, durability thiab adhesion ntawm cov khoom cement-based los ntawm kev tsim cov yeeb yaj kiab ruaj khov thaum lub sij hawm hardening. RDP yog cov hmoov qhuav qhuav uas yuav tsum tau muab rov qab rau hauv dej ua ntej siv. Cov khoom thiab viscosity ntawm RDP yog qhov tseem ceeb vim tias lawv cuam tshuam rau qhov zoo ntawm cov khoom kawg. Kab lus no piav qhia txog RDP kev ua tau zoo thiab cov kev ntsuas viscosity uas tuaj yeem pab cov tuam txhab txhim kho cov khoom zoo thiab ua kom cov neeg siv khoom txaus siab.
RDP txoj kev xeem ua haujlwm
Txoj kev ntsuas kev ua tau zoo ntawm RDP yog tsim los ntsuas lub peev xwm ntawm RDP los txhim kho kev ua haujlwm ntawm cov khoom siv cement. Cov txheej txheem xeem yog raws li nram no:
1. Kev npaj khoom siv
Npaj cov ntaub ntawv hauv qab no: RDP, Portland cement, xuab zeb, dej, thiab plasticizer. Sib tov Portland cement thiab xuab zeb hauv qhov sib piv ntawm 1: 3 kom tau txais kev sib xyaw qhuav. Npaj ib qho kev daws los ntawm kev sib tov dej thiab plasticizer hauv qhov sib piv 1: 1.
2. sib
Sib tov RDP nrog dej nyob rau hauv ib tug blender kom txog thaum ib homogeneous slurry tau txais. Ntxiv slurry rau qhuav mix thiab sib tov rau 2 feeb. Ntxiv cov dej plasticizer tov thiab sib tov rau 5 feeb ntxiv. Lub resulting sib tov yuav tsum muaj ib tug tuab, creamy sib xws.
3. Thov
Siv lub trowel, kis cov sib tov mus rau ib tug tuab ntawm 2 hli ntawm ib tug huv si, qhuav, tiaj tus. Siv ib tug menyuam txhuam kom du nto thiab tshem tawm cov npuas. Cia cov qauv kho ntawm chav sov li 28 hnub.
4. Kev ntsuas kev ua haujlwm
Cov qauv kho tau raug tshuaj xyuas rau cov khoom hauv qab no:
- Compressive zog: Lub zog compressive tau ntsuas siv lub tshuab ntsuas thoob ntiaj teb. Lub zog compressive yuav tsum siab dua cov qauv tswj tsis muaj RDP.
- Flexural Strength: Lub zog flexural tau ntsuas los ntawm kev ntsuas peb-point dabtsi yog khoov. Lub zog flexural yuav tsum siab dua cov qauv tswj tsis muaj RDP.
- Adhesive Strength: Lub zog nplaum yog ntsuas los ntawm kev ntsuas rub. Lub zog ntawm daim ntawv cog lus yuav tsum siab dua cov qauv tswj tsis muaj RDP.
- Dej tsis kam: Cov qauv kho tau muab tso rau hauv dej rau 24 teev thiab cov khoom raug tshuaj xyuas dua. Nws qhov kev ua tau zoo yuav tsum tsis txhob cuam tshuam loj heev tom qab kev sib cuag nrog dej.
Txoj kev ntsuas kev ua tau zoo ntawm RDP tuaj yeem muab lub hom phiaj thiab ntau cov ntaub ntawv ntawm kev ua tau zoo ntawm RDP hauv kev txhim kho kev ua haujlwm ntawm cov khoom siv cement. Cov neeg tsim khoom tuaj yeem siv txoj hauv kev no los txhim kho RDP formulations thiab ua kom cov khoom zoo sib xws.
RDP Viscosity Test Method
RDP viscosity test method yog tsim los ntsuas tus cwj pwm ntws ntawm RDP hauv dej. Cov txheej txheem xeem yog raws li nram no:
1. Kev npaj khoom siv
Npaj cov ntaub ntawv hauv qab no: RDP, dej deionized, viscometer, thiab calibration kua. Qhov viscosity ntau ntawm cov kua calibration yuav tsum zoo ib yam li qhov xav tau viscosity ntawm RDP.
2. Kev ntsuas viscosity
Ntsuas cov viscosity ntawm cov kua calibration nrog lub viscometer thiab sau tus nqi. Ntxuav lub viscometer thiab sau nrog dej deionized. Ntsuas cov viscosity ntawm cov dej thiab sau cov nqi. Ntxiv ib qho nyiaj paub txog RDP rau hauv dej thiab do maj mam kom txog thaum sib tov homogeneous. Cia cov sib tov zaum rau 5 feeb kom tshem tawm cov npuas npuas. Ntsuas qhov viscosity ntawm qhov sib tov siv lub viscometer thiab sau tus nqi.
3. xam
Xam cov viscosity ntawm RDP hauv dej siv cov qauv hauv qab no:
RDP Viscosity = (Muab Viscosity – Dej Viscosity) / (Calibration Fluid Viscosity – Dej Viscosity) x Calibration Fluid Viscosity
RDP viscosity test method muab ib qho qhia txog qhov yooj yim RDP redisperses hauv dej. Qhov siab dua qhov viscosity, qhov nyuaj dua qhov redispersibility, thaum qis dua qhov viscosity, qhov nrawm dua thiab ua tiav qhov redispersibility. Cov neeg tsim khoom tuaj yeem siv txoj kev no los kho cov qauv ntawm RDP thiab ua kom pom kev rov ua dua tshiab.
nyob rau hauv xaus
RDP cov khoom thiab viscosity xeem txoj kev yog cov cuab yeej tseem ceeb rau kev ntsuam xyuas qhov zoo ntawm RDPs thiab optimizing lawv formulations. Los ntawm kev siv cov txheej txheem no, cov tuam txhab lag luam tuaj yeem xyuas kom meej tias lawv cov khoom RDP ua tau raws li qhov yuav tsum tau ua thiab kev siv yooj yim, yog li ua rau cov neeg siv khoom txaus siab thiab kev ntseeg siab. Cov neeg tsim khoom raug qhia kom ua raws li cov txheej txheem kev sim thiab siv cov cuab yeej ntsuas ntsuas kom ntseeg tau tias muaj tseeb thiab txhim khu kev qha. Raws li RDP thev naus laus zis txuas ntxiv txhim kho, qhov kev thov rau cov khoom siv ua haujlwm siab thiab siv tau yooj yim RDP xav tias yuav nce ntxiv rau yav tom ntej.
Post lub sij hawm: Sep-04-2023