Cov nyhuv ntawm RDP koob tshuaj rau ntawm lub zog sib txuas ntawm putty thiab kev tiv thaiv dej

Putty yog ib yam khoom siv tseem ceeb uas siv dav hauv kev kho kom zoo nkauj hauv tsev, thiab nws qhov zoo cuam tshuam ncaj qha rau lub neej ua haujlwm thiab kev kho kom zoo nkauj ntawm cov xim pleev phab ntsa. Lub zog sib txuas thiab kev tiv thaiv dej yog cov cim tseem ceeb rau kev ntsuam xyuas kev ua tau zoo ntawm putty.Cov hmoov latex uas yaj tau dua tshiab, ua cov khoom siv hloov kho polymer organic, ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo ntawm putty.

1. Txoj kev ua haujlwm ntawm cov hmoov latex uas tawg tau dua tshiab

Cov hmoov latex uas tawg tau dua yog cov hmoov uas tsim los ntawm kev txau cov polymer emulsion kom qhuav. Nws tuaj yeem rov ua emulsify los tsim cov polymer dispersion system ruaj khov tom qab kov dej, uas ua lub luag haujlwm hauv kev txhim kho lub zog sib txuas thiab kev ywj pheej ntawm putty. Nws cov haujlwm tseem ceeb suav nrog:

Txhim kho lub zog sib txuas: Cov hmoov latex uas tawg tau dua tshiab tsim cov zaj duab xis polymer thaum lub sijhawm ziab ntawm putty, thiab sib koom ua ke nrog cov ntaub ntawv inorganic gelling los txhim kho lub peev xwm sib txuas ntawm interfacial.

Txhim kho kev tiv thaiv dej: Cov hmoov latex tsim cov hydrophobic network hauv cov qauv putty, txo cov dej nkag thiab txhim kho kev tiv thaiv dej.

Txhim kho qhov yooj ywm: Nws tuaj yeem txo qhov brittleness ntawm putty, txhim kho lub peev xwm deformation, thiab txo qhov kev pheej hmoo ntawm kev tawg.

2. Kev kawm sim

Cov ntaub ntawv sim

Cov khoom siv hauv paus: cement-based putty hmoov

Cov hmoov latex uas tawg tau dua: ethylene-vinyl acetate (EVA) copolymer latex hmoov

Lwm cov khoom ntxiv: thickener, water retaining agent, filler, thiab lwm yam.

Txoj kev sim

Cov tshuaj putties uas muaj cov hmoov latex sib txawv (0%, 2%, 5%, 8%, 10%) tau npaj raws li, thiab lawv lub zog sib txuas thiab kev tiv thaiv dej tau raug sim. Lub zog sib txuas tau txiav txim siab los ntawm kev sim rub tawm, thiab qhov kev sim tiv thaiv dej tau raug soj ntsuam los ntawm qhov nrawm ntawm kev khaws cia tom qab muab tso rau hauv dej rau 24 teev.

3. Cov txiaj ntsig thiab kev sib tham

Cov nyhuv ntawm cov hmoov latex uas tawg tau dua tshiab rau lub zog sib txuas

Cov txiaj ntsig ntawm kev sim qhia tau hais tias nrog kev nce ntawm RDP koob tshuaj, lub zog sib txuas ntawm putty qhia txog qhov sib txawv ntawm thawj zaug nce thiab tom qab ntawd ruaj khov.

Thaum cov tshuaj RDP nce ntxiv ntawm 0% mus rau 5%, lub zog sib txuas ntawm cov putty tau zoo dua qub, vim tias cov zaj duab xis polymer tsim los ntawm RDP ua rau lub zog sib txuas ntawm cov khoom siv hauv paus thiab cov putty txhim kho.

Txuas ntxiv nce RDP mus rau ntau dua 8%, qhov kev loj hlob ntawm lub zog sib txuas feem ntau yog tiaj tus, thiab txawm tias me ntsis txo qis ntawm 10%, uas tej zaum yog vim RDP ntau dhau yuav cuam tshuam rau cov qauv nruj ntawm putty thiab txo qhov muaj zog ntawm qhov interface.

Cov nyhuv ntawm cov hmoov latex uas tawg tau dua tshiab rau kev tiv thaiv dej

Cov txiaj ntsig ntawm kev sim tiv thaiv dej qhia tau hais tias qhov ntau ntawm RDP muaj qhov cuam tshuam loj rau qhov tsis kam dej ntawm putty.

Lub zog sib txuas ntawm putty tsis muaj RDP txo qis tom qab soaking hauv dej, qhia txog kev tiv thaiv dej tsis zoo.

Qhov ntxiv ntawm RDP kom tsim nyog (5% -8%) ua rau cov putty tsim cov qauv sib xyaw ua ke ntawm cov organic-inorganic, txhim kho kev tiv thaiv dej, thiab txhim kho qhov kev khaws cia lub zog tom qab 24 teev ntawm kev immersion.

Txawm li cas los xij, thaum cov ntsiab lus RDP tshaj 8%, qhov kev txhim kho ntawm kev tiv thaiv dej txo qis, uas tej zaum yuav yog vim muaj ntau yam khoom siv organic txo qhov muaj peev xwm tiv thaiv hydrolysis ntawm putty.

Cov lus xaus hauv qab no tuaj yeem kos los ntawm kev tshawb fawb sim:

Ib qho nqi tsim nyog ntawmhmoov latex uas yaj tau dua tshiab(5% -8%) tuaj yeem txhim kho lub zog sib txuas thiab dej tsis kam ntawm putt.

Kev siv RDP ntau dhau (> 8%) yuav cuam tshuam rau qhov qauv khov kho ntawm putty, ua rau qeeb lossis txo qis hauv kev txhim kho ntawm lub zog sib txuas thiab kev tiv thaiv dej.

Qhov koob tshuaj zoo tshaj plaws yuav tsum tau ua kom zoo tshaj plaws raws li qhov xwm txheej ntawm daim ntawv thov tshwj xeeb ntawm putty kom ua tiav qhov sib npaug zoo tshaj plaws ntawm kev ua tau zoo thiab tus nqi.