Cellulose ethers feem ntau yog siv los ua additives hauv gypsum-raws li mortars los txhim kho ntau yam khoom thiab kev ua tau zoo. Cov hauv qab no yog qee qhov kev siv tshwj xeeb ntawm cellulose ethers hauv gypsum mortar:
Kev tuav dej:
Cellulose ethers yog hydrophilic polymers, txhais tau tias lawv muaj kev sib raug zoo rau dej. Thaum ntxiv rau plaster mortars, lawv zoo khaws cov dej noo thiab tiv thaiv qhov sib xyaw kom qhuav sai sai. Qhov no yog qhov tseem ceeb los xyuas kom meej tias lub plaster muaj sijhawm txaus los ua kom dej kom zoo thiab txhim kho kev ua haujlwm.
Processability thiab yooj yim ntawm daim ntawv thov:
Cov dej tuav cov khoom ntawm cellulose ethers pab txhim kho kev ua haujlwm ntawm gypsum mortar. Mortar tau yooj yim rau kev sib tov, sib kis thiab siv tau, ua rau kev tsim kho kom zoo dua qub thiab ua haujlwm zoo dua.
Txo shrinkage:
Cellulose ethers pab tswj kom qhuav shrinkage ntawm gypsum mortars. Los ntawm kev tswj xyuas cov dej txaus thaum lub sij hawm teeb tsa thiab ziab, cellulose ethers pab txo qis kev tawg thiab ua kom muaj qhov ruaj khov ntawm cov khoom tiav.
Txhim kho adhesion:
Cellulose ethers txhim khu cov adhesion ntawm gypsum mortar rau ntau yam substrates, nrog rau cov phab ntsa thiab qab nthab. Qhov no yog ib qho tseem ceeb tshwj xeeb hauv kev siv xws li plastering thiab rendering, qhov twg muaj zog daim ntawv cog lus tseem ceeb heev rau lub durability thiab ntev ntawm lub tiav lawm nto.
Crack kuj:
Ntxiv cellulose ether tuaj yeem txhim kho qhov tawg tsis kam ntawm mortar. Qhov no yog tshwj xeeb tshaj yog muaj txiaj ntsig nyob rau hauv cov cheeb tsam uas cov txheej txheem txav tau yooj yim tshwm sim los yog qhov chaw mortar yuav raug kev nyuaj siab, xws li kev sib koom ua ke thiab cov txheej txheej putty.
Anti-sag:
Nyob rau hauv ntsug daim ntaub ntawv, xws li phab ntsa plasters, cellulose ethers ua raws li thickeners, txo sag thiab slumping ntawm lub mortar. Cov yam ntxwv no pab tswj cov tuab tuab ntawm qhov chaw ntsug, txhim kho kev zoo nkauj thiab kev ua haujlwm ntawm daim ntawv thov zaum kawg.
Txhim khu kev cohesion:
Cellulose ethers pab txhawb kev sib koom ua ke ntawm cov tshuaj khib nyiab sib xyaw, txhim kho nws cov qauv kev ncaj ncees tag nrho. Qhov no yog ib qho tseem ceeb nyob rau hauv daim ntawv thov uas lub mortar yuav tsum tau tiv thaiv sab nraud quab yuam los yog kev ntxhov siab.
Freeze-thaw stability:
Cellulose ethers tuaj yeem txhim kho qhov khov-thaw ruaj khov ntawm gypsum mortars, ua rau lawv tiv taus kev puas tsuaj hauv ib puag ncig nrog qhov kub thiab txias. Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog rau kev tsim kho cov ntawv thov raug huab cua hnyav.
Ntxiv sijhawm teem sijhawm:
Kev siv cov cellulose ethers tuaj yeem txuas ntxiv lub sijhawm teem ntawm plaster mortar, ua kom yooj yim dua hauv kev thov thiab ua tiav. Qhov no yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig hauv cov xwm txheej uas xav tau sijhawm ua haujlwm ntev dua.
Txhim kho rheological zog:
Cellulose ethers pab txhawb rau rheological zog ntawm lub mortar, influencing nws ntws thiab deformation yam ntxwv. Qhov no pab ua kom tiav qhov xav tau sib xws thiab kev ua haujlwm ntawm daim ntawv thov.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias hom tshwj xeeb thiab ntau npaum li cas ntawm cellulose ether siv thiab cov qauv ntawm gypsum mortar yuav tsum tau ua tib zoo txiav txim siab kom ua tiav cov txiaj ntsig xav tau hauv daim ntawv thov. Cov neeg tsim khoom nquag ua qhov kev sim thiab ua kom zoo dua los txiav txim siab cov ntsiab lus ntawm cellulose ether zoo tshaj plaws rau lawv cov khoom tshwj xeeb thiab kev siv.
Post lub sij hawm: Nov-24-2023