Shrinkage nyob rau hauv cov xis ua kom zoo nkauj, xws li Mortars thiab pob zeb ua kom muaj peev xwm ua rau muaj kev tawg thiab cov kev tsis muaj zog. Qhov tshwm sim no tshwm sim vim yog cov dej poob los ntawm cov dej sib tov, uas ua rau txo qis hauv ntim. Ntau lub tswv yim tau ua haujlwm txo qis txiav tawm, ib qho ntawm cov koom nrog kev sib koom tes ntawm cov xim liab polymer (RDP). RDPs tau siv dav siv hauv cov ntaub ntawv tsim kho los txhim kho cov khoom zoo li cov nplaum, yoog raws, thiab dej rov qab.
Muaj pes tsawg leeg thiab tshuab ntawm RDP
Recispersible polymer hmoov yog tsim los ntawm cov tshuaj tsuag dej tawg ntawm cov roj polymers, feem ntau yog los ntawm vinyl acetate-seltras (vae), styrene-butzere-butteriene, lossis acrylicpolymers. Thaum ntxiv rau kev sib xyaw qhuav, RDP tuaj yeem raug tsa hluav taws xob rau hauv dej, sib sau ua ke polymer zoo li cov yeeb yaj kiab uas muaj dej ua ke nyob rau hauv lub qabentitigitious tag matrix.
Tus txheej txheem los ntawm rdp txo shrinkage yog multifaceted:
Dej khaws cia: RDPS txhim kho kev ua kom muaj peev xwm ua kom muaj peev xwm ua kom muaj peev xwm. Qhov no ntev ua cov txheej txheem hydration ntawm cov cement, txo lub hnub nyoog shrinkage uas tshwm sim vim yog dej ceev.
Zaj duab xis tsim: Raws li RDP hais coales rau hauv kev ua yeeb yaj kiab tas li, lawv tsim qee qhov kev ntxhov siab tshwm sim los ntawm shrinkage, yog li txo kev nrib pleb.
Txhim kho cohesion thiab yooj tau network txhim kho cov khoom siv hloov tag nrho ntawm cov khoom siv tawv, tso cai kom tiv thaiv zoo dua shrinkage-induced kev nyuaj siab.
Sab hauv kev kho: cov polymer hais tuaj yeem ua haujlwm rau dej, maj mam tso nws lub sijhawm thiab muab kho sab hauv. Qhov no mitigates kev txhim kho ntawm shrinkage ntxhov siab thaum lub sijhawm kho thaum ntxov.
Cuam tshuam rau shrinkage txo
Thaum ntxov lub hnub nyoog shrinkage
Thaum ntxov lub hnub nyoog shrinkage, tshwm sim nyob rau hauv thawj 24 txog 48 teev tom qab tov, yog feem ntau vim yog dej cug ntawm cov tshuaj khib los yog pob zeb. RDPS pab txhawb kom txo cov hom shrinkage no los ntawm:
Txo cov evaporation: cov duab ua yeeb yaj kiab polymer uas ua rau cov npoo txo cov dej evaporation, yog li tswj hwm cov neeg muaj kuab ntau dua nyob rau hauv cov khoom siv.
Txhim Kho Tshuaj Kho Mob: Los ntawm khaws cov dej nyob hauv qhov sib xyaw rau lub sijhawm ntev dua, RDPs pab kom ntseeg tau tias cov khoom noj kom huv si, txo qhov ntawm cov yas tawg.
Kom Qhuav Shrinkage
Kom qhuav shrinkage tshwm sim tshaj lub sijhawm ntev dua li cov khoom poob dej mus rau ib puag ncig ib puag ncig. RDPs Mitting Kom Qhuav Shrinkage Los Ntawm Ntau Cov Txheej Txheem:
Polymer zaj duab xis hloov: tus tshiab polymer network tsis muaj kev tawg me ntsis yam tsis muaj kev tawg nrog kom qhuav.
Kev ntxhov siab: Muaj cov polymer network pab muab faib cov kev ntxhov siab sab hauv ntau tusyees, txo qis cov kev ntxhov siab uas muaj peev xwm ua rau tawg.
Txo hauv Capillary rog: cov yeeb yaj kiab polymer nyob hauv lub hws capillary uas tsav shrinkage uas tsav shrinkage, yog li txo qis kev nyab xeeb.
Cov txiaj ntsig hauv kev siv daim ntawv thov
Txhim Kho Durability
Qhov muaj kev sib txuam ntawm RDP rau hauv cov khoom qab zib tsis tsuas yog txo cov shrinkage xwb tab sis kuj txhim kho kev ruaj khov. Daim duab qhia qoob loo polymer yooj ywm uas cov ntaub ntawv nyob rau hauv matrix tuaj yeem tiv thaiv microcacks, tiv thaiv lawv qhov kev hais tawm mus rau hauv cov kab nrib pleb uas cov kev sib tw sib luag. Qhov no ua rau muaj kev nce ntxiv rau cov khoom ib puag ncig xws li khov-yaj kev voj voog, kev tawm tsam tshuaj lom neeg, thiab kev puas tsuaj.
Txhim Kho Kev Ua Haujlwm
RDP-hloov cov neeg nplua nuj thiab cov teeb meem ua pov thawj ua kom muaj zog ua haujlwm, ua rau lawv yooj yim rau kev thov thiab ua tiav. Qhov no tuaj yeem tau txais txiaj ntsig tshwj xeeb hauv cov ntawv thov, xws li hauv cov flooring lossis zoo nkauj tiav.
Adhesion thiab Bond Lub Zog
RDPS txhim kho cov nplaum ntawm cov xis kawm rau ntau yam substrates, suav nrog cov pob zeb ua, Masonry, thiab hlau. Qhov no yog qhov tseem ceeb hauv kev siv xws li cov khoom siv tsis zoo, thiab sab nraud rwb thaiv tsev, qhov twg yog qhov tseem ceeb rau kev ua tau zoo thiab thiav.
Versatility hauv daim ntawv thov
RDPs tuaj yeem siv tau rau hauv ntau hom khoom tsim kho, suav nrog cov nplais nplaum, kho cov khoom lag luam tus kheej, thiab cov thermal rwb thaiv tsev puas tau siv cov tshuab (etics). Lawv lub peev xwm los txo cov shrinkage thiab txhim kho lwm cov khoom ua rau lawv muaj ntau yam ntxiv tsim nyog rau ntau yam kev tsim txom.
Cov Ntaub Ntawv Kawm thiab Cov Ntaub Ntawv Siv Tswv Yim
Cov nplaum nplaum
Nyob rau hauv cov nplais nplaum, RDPS ua si ib lub luag haujlwm tseem ceeb hauv kev txo cov vuas luaj, kom cov vuas uas tsis muaj kev pheej hmoo yog tsis muaj kev pheej hmoo ntawm kev debond lossis tawg. Lub txhim kho adhesion thiab yoog raws li RDP kuj haum cov kev txav me me nyob hauv av, tiv thaiv kev ntxhov siab ntawm cov nplais interface.
Kho cov neeg yuav khoom Mortars
Kho cov neeg nplua nuj tau hloov kho nrog RDP kev nthuav tawm cov qhov thaiv kom txo qis qis, uas yog qhov tseem ceeb rau kev tiv thaiv kev tsim cov kab nrib pleb tshiab hauv kev kho cov qauv. Cov nplaum txhim kho thiab cohesion kuj ua kom cov khoom siv kho tau zoo nrog cov qauv qauv uas twb muaj lawm, muab cov tshuaj ntev-ntev.
Kev Ntsuas Tus Kheej
Nyob rau hauv tus kheej-levels sib txuas, RDPS pab txhawb rau kev du, txawm tias saum npoo nrog qhov qis me me. Qhov no yog qhov tshwj xeeb tshaj nyob rau hauv cov ntawv thov uas qib pem teb yog qhov tseem ceeb, xws li hauv kev lag luam lossis kev lag luam.
Redispersible polymer hmoov ua si ib tug pivotal lub luag hauj lwm hauv kev txo cov khoom siv khov kho, yog li txhim kho lub durability, ua haujlwm ntawm cov khoom siv tsim. Los ntawm cov tshuab xws li dej khaws cia, zaj duab xis tsim, thiab kev ntxhov siab, RDP thaum ntxov thiab kom qhuav kev sib tw hauv kev tsim kho. Lawv cov versatility thiab effectiveness ua rau lawv muaj kev tsis txaus siab ntxiv nyob rau hauv ntau cov kev siv, los ntawm cov khoom xyaw ua ke los kho cov khoom siv nyiaj txiag thiab kev ntsuas tus kheej. Los ntawm kev koom tes RDPS, kev tsim kho kev tsim kho tuaj yeem ua tiav ntau ruaj khov, txhim khu kev qha, thiab kev ua kom zoo nkauj, ua rau muaj kev nyab xeeb thiab kev nyab xeeb ntawm cov qauv tsim.
Lub Sijhawm Post: Feb-18-2025