Gypsum retarder
Gypsum retardants ua lub luag haujlwm tseem ceeb hauv kev tsim kho thiab tsim cov khoom siv hauv kev lag luam, ua haujlwm los tswj lub sijhawm teem sijhawm ntawm cov khoom siv gypsum kom ntseeg tau tias kev ua haujlwm zoo dua thiab siv tau. Ntawm cov retardants no, organic acids, soluble ntsev, yooj yim phosphates, thiab cov proteins yog cov khoom tseem ceeb sau tseg rau lawv cov kev ua tau zoo. Cov organic acids uas tseem ceeb tshaj plaws ua haujlwm ua retarders suav nrog citric acid, sodium citrate, tartaric acid, potassium tartrate, acrylic acid, thiab sodium acrylate. Nyob rau hauv pawg no, citric acid thiab nws cov ntsev sodium tau txais kev saib xyuas tseem ceeb vim lawv cov khoom muaj zog retarding pom txawm tias tsawg npaum li cas. Qhov kev ua tau zoo no tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau ntau yam kev siv gypsum, vim nws yooj yim rau lub sijhawm ua haujlwm ntev dua thaum tswj xyuas qhov xav tau ntawm cov khoom kawg. Ntxiv nrog rau cov organic acids, phosphate retarders xws li sodium hexametaphosphate thiab sodium polyphosphate tau siv dav. Cov khoom sib txuas no yog qhov tseem ceeb hauv kev tsim cov khoom siv gypsum, suav nrog kev sib koom ua ke gypsum, gypsum putty, thiab lwm yam ntaub ntawv koom nrog hauv kev tsim cov khoom siv hauv tsev gypsum. Lub luag haujlwm tseem ceeb ntawm cov phosphate retarders yog kom qeeb cov txheej txheem condensation ntawm gypsum, tso cai rau kev txhim kho kev tswj xyuas thaum lub sij hawm sib tov thiab daim ntawv thov. Los ntawm kev sib koom ua ke nrog cov retardants, cov tuam ntxhab tuaj yeem ua kom zoo dua qhov kev ua tau zoo ntawm cov khoom siv gypsum, yog li txhim kho kev ua haujlwm ntawm cov chaw tsim kho thiab ua kom ntseeg tau tias qhov kev xav tau ntawm cov khoom tiav. Qhov kev xav tau rau kev txhim khu kev qha thiab zoo retardants tau ua rau muaj kev tshawb fawb dav hauv cheeb tsam no, tshwj xeeb yog tsom rau kev sib cuam tshuam ntawm cov khoom siv nrog gypsum. Cov kev tshawb fawb pom tau hais tias cov qauv molecular ntawm cov retarders plays lub luag haujlwm tseem ceeb hauv lawv cov txiaj ntsig, ua rau muaj kev hloov kho tshiab hauv kev tsim kom muaj txiaj ntsig zoo tshaj plaws. Raws li kev tsim kho kev lag luam txuas ntxiv mus, qhov kev thov rau cov khoom zoo, ruaj khov gypsum tseem nyob tas li. Yog li ntawd, kev txhim kho thiab kev siv cov tshuaj tiv thaiv siab heev yog qhov tseem ceeb rau kev ua kom tau raws li qhov xav tau ntawm kev tsim kho niaj hnub no. Tsis tas li ntawd, kev tsim kom zoo ib puag ncig ntawm cov ntaub ntawv no yog nyob rau hauv kev tshuaj xyuas, ua rau cov kws tshawb fawb los tshawb nrhiav cov kev xaiv muaj txiaj ntsig thiab kev hloov pauv biodegradable rau cov tshuaj retardants. Qhov sib npaug ntawm kev ua tau zoo thiab kev cuam tshuam ib puag ncig yog qhov tseem ceeb vim cov tuam txhab lag luam tsom los muab cov kev daws teeb meem zoo gypsum uas ua raws li cov hom phiaj kev lag luam sustainability. Zuag qhia tag nrho, daim ntawv thov ntawm gypsum retardants, tshwj xeeb tshaj yog cov organic acids, soluble ntsev, thiab phosphates, yog ib qho tseem ceeb nam ntawm gypsum siv cov khoom uas txhim khu lawv usability. Los ntawm kev ntiav ntau tus neeg ua haujlwm retarding, cov neeg tsim khoom tuaj yeem ua kom cov txheej txheem kev siv tau zoo thiab tiv thaiv kev ncaj ncees thiab kev ua haujlwm ntev ntawm cov qauv. Kev nce qib ntxiv hauv kev kawm ntawm gypsum retardation tsis tsuas yog txhim kho cov khoom ua tau zoo tab sis kuj tseem ua rau muaj kev cuam tshuam ntau dua hauv kev tsim kho kev lag luam, thaum kawg ua rau cov txiaj ntsig zoo dua ob qho tib si ntawm kev ua haujlwm thiab lub luag haujlwm ib puag ncig. Hauv kev xaus, kev nkag siab txog ntau hom gypsum retardants tam sim no siv yog qhov tseem ceeb rau cov neeg koom nrog hauv kev tsim kho, vim nws txhawb lawv kom xaiv cov khoom ntxiv uas tsim nyog uas ua tiav cov txiaj ntsig xav tau thaum ua raws li kev coj ua. Qhov kev paub no nce qib ntawm cov ntaub ntawv tsim kho, kom ntseeg tau tias yav tom ntej ntawm gypsum ntau lawm yog tus cwj pwm los ntawm kev tsim kho tshiab, kev ua tau zoo, thiab kev nco qab ib puag ncig.
