Hnub Tim:17,Jul,2023
Feem ntau cov teeb meem kev tsim kho cov teeb meem ntawm phab ntsa sab hauv Putty yog tev thiab ntxuav hniav dawb. Txhawm rau kom nkag siab txog cov laj thawj rau kev tev ntawm sab hauv phab ntsa putty, nws yog qhov tsim nyog los nkag siab cov khoom siv rawty, nws yog qhov tsim nyog rau kev sib xyaw ua ke ntawm phab ntsa sab hauv walty. Tom qab ntawd, raws li cov dryness, nqus dej, kub, thiab huab cua kev tsim kho ntawm phab ntsa Putty thiab siv cov kev sib raug zoo los daws cov teeb meem ntawm putty hmoov tev
, Cov Khoom Siv Raw Khoom Siv Cov Khoom Siv Hauv Sab Hauv Phab Ntsa Putty Hmoov:
Cov khoom siv yooj yim tshaj plaws ntawm sab hauv phab ntsa Putty muaj xws li: cov hmoov av ntsuab (HPMC, cov hmoov polyvinyl, roj hmab hmoov, thiab lwm yam). Ntawm lawv, sab hauv phab ntsa putty feem ntau tsis ntxiv cov cement dawb los yog tsuas yog ntxiv cov cement me me. Redispersible looj cov hmoov me me ntawm cov tshuaj qis, yog li nws yog feem ntau tsis siv nyob rau sab hauv phab ntsa putty vim muaj teeb meem nqi lossis siv ntau.
Yog li vim qhov teeb meem nrog cov qauv ntawm phab ntsa sab hauv Putty Patty hmoov nws tus kheej:
1. Inorganic tsevneeg cov ntaub ntawv, xws li cov tshuaj calcium grey thiab substong zoo ntawm grey calcium;
2. Qhov kev sib ntxiv ntawm cov khoom sib ntxiv hauv cov tshuaj ntxiv hauv polymer uas tsis muaj txiaj ntsig tsawg lossis tsis tau raws li cov qauv zoo dua tuaj yeem ua rau sab hauv wall hmoov poob.
二, Cais kho tshuab ntawm phab ntsa sab hauv Putty:
Kev kho lub phab ntsa sab hauv Putty hmoov ntawm cov txiaj ntsig syergistic ntawm cov hmoov av calcium hmoov, HPMC thiab lwm yam yeeb yaj kiab, thiab tswj cov txheej txheem kho.
Lub hauv paus siab tawv ntawm grey calcium hmoov:
Kom qhuav thiab tawv tawv: thaum lub sij hawm scraping, muaj cov dej ntws tawm ntau ntawm cov hmoov av grey, sib sau cov naag loj ntawm cov slurry. Cov dej dawb nyob hauv lub qhov hws, vim muaj qhov nro ntawm cov dej, tsim cov capillary siab, ua rau cov hmoov av ua kom pom ntau ntxiv, yog li tau txais lub zog. Thaum cov mellry yog qhov ntxiv tau qhuav, cov nyhuv no tseem muaj zog. Crystallization hardening: mas dispersed colloidal hais hauv slurry yog sib cais los ntawm qhov diffusion txheej nruab nrab ntawm cov lus. Raws li cov dej cov ntsiab lus maj mam txo qis, txheej diffusion txheej zuj zus, thiab yog li cov kev sib xyaw ua ke ntawm cov qauv molecular ntawm cov qauv masters ntawm cov qauv tsim tawm, yog li tau txais lub zog. Cov pa roj carbon hardening: Cov Slurry Absigbs co2 roj co2 roj los ntawm huab cua, ua kom muaj calcium carbonate uas yog tiag tiag hauv dej. Cov txheej txheem no hu ua carbonation ntawm slurry. Cov coual referts muaj raws li nram no:
Ca (Huag) 2 + CE2 + H2O → CACO3 + (N + 1) H2O
Cov teeb meem calcium carbonate muaju nrog txhua lwm yam lossis nrog cov calcium hydroxide, li kev txhim kho lub zog ntawm lub zog ntawm cov slurry. Tsis tas li ntawd, vim yog cov khoom muaj me ntsis ntau dua ntawm calcium carbonate piv, cov calcium grey calcium hmoov slurry nyhav kom tau ntau dua. 3, Tom qab cov hmoov tso rau putty yog thov rau phab ntsa, cov dej hauv lub putty yog feem ntau yog ploj los ntawm peb txoj kev:
Cov dej evaporation ntawm qhov chaw ntawm lub putty thaum lub grey calcium thiab dawb xis mas muaj kev nqus putty hmoov ntawm cov phab ntsa saum npoo av. 3. Qhov cuam tshuam ntawm cov khoom siv tsim nyog ntawm cov hmoov uas ua rau cov hmoov muaj putty:
Cov laj thawj rau hmoov tsis muaj tshwm sim los ntawm kev tsim kho muaj xws li: kev txij nkawm tsis zoo ua rau lub putty kom qhuav sai thiab tsis muaj lub zog sai thiab tsis muaj lub zog txaus; Cov Phab Ntsa Yooj Yim Qhuav dhau lawm qhuav heev, ua rau muaj kev tso dej kom sai sai; Ntau dhau thickness ntawm putty hauv ib pob.
Lub Sijhawm Post: Jul-17-2023