Ib qho kev sib xyaw ua ke muaj kev txwv hauv kev txhim kho kev ua haujlwm ntawm gypsum slurry. Yog hais tias qhov kev ua tau zoo ntawm gypsum mortar yog ua tiav cov txiaj ntsig zoo thiab ua tau raws li cov kev xav tau sib txawv, cov khoom siv tshuaj lom neeg, cov khoom sib xyaw, cov khoom siv, thiab ntau yam ntaub ntawv yuav tsum tau muab sib xyaw thiab ua kom tiav raws li kev tshawb fawb thiab tsim nyog.
01. Coagulation regulator
Coagulation regulators feem ntau muab faib ua retarders thiab accelerators. Nyob rau hauv gypsum qhuav-mixed mortar, retarders yog siv rau cov khoom npaj nrog plaster ntawm paris, thiab accelerators yuav tsum tau rau cov khoom npaj nrog anhydrous gypsum los yog ncaj qha siv dihydrate gypsum.
02. Rov qab
Ntxiv retarder rau gypsum qhuav-sib tov lub tsev cov ntaub ntawv inhibits cov txheej txheem hydration ntawm hemihydrate gypsum thiab prolongs lub sij hawm teem. Muaj ntau yam kev mob rau hydration ntawm plaster, nrog rau cov theem ntawm plaster, qhov kub ntawm cov ntaub ntawv plaster thaum npaj cov khoom, particle fineness, teem sij hawm thiab pH nqi ntawm cov khoom npaj, thiab lwm yam. , yog li muaj qhov sib txawv loj ntawm tus nqi ntawm cov retarder hauv ntau qhov xwm txheej. Tam sim no, qhov zoo dua retarder rau gypsum nyob rau hauv Suav teb yog cov hloov kho cov protein (high protein) retarder, uas muaj qhov zoo ntawm cov nqi qis, lub sij hawm ntev retardation, me me lub zog poob, cov khoom siv zoo, thiab lub sijhawm qhib ntev. Tus nqi siv rau hauv kev npaj hauv qab-txheej stucco plaster yog feem ntau 0.06% mus rau 0.15%.
03. Coagulant
Accelerating slurry stirring lub sij hawm thiab ncua lub slurry stirring ceev yog ib txoj kev ntawm lub cev coagulation acceleration. Feem ntau siv cov tshuaj coagulants hauv cov khoom siv hauv cov hmoov anhydrite muaj xws li potassium chloride, potassium silicate, sulfate thiab lwm yam kua qaub. Qhov ntau npaum yog 0.2% mus rau 0.4%.
04. Tus neeg saib xyuas dej
Gypsum qhuav-mix lub tsev cov ntaub ntawv yog inseparable los ntawm cov dej-retaining agents. Kev txhim kho cov dej tuav tus nqi ntawm gypsum khoom slurry yog los xyuas kom meej tias cov dej muaj nyob rau hauv lub gypsum slurry rau lub sij hawm ntev, thiaj li kom tau ib tug zoo hydration hardening nyhuv. Txhawm rau txhim kho kev tsim kho ntawm gypsum hmoov cov ntaub ntawv hauv tsev, txo thiab tiv thaiv kev sib cais thiab los ntshav ntawm gypsum slurry, txhim kho sagging ntawm slurry, ncua lub sij hawm qhib, thiab daws teeb meem engineering zoo xws li tawg thiab hollowing yog tag nrho inseparable los ntawm cov dej tuav cov neeg ua haujlwm. Txawm hais tias cov dej tuav cov neeg sawv cev yog qhov zoo tshaj plaws nyob ntawm nws qhov dispersibility, instant solubility, moldability, thermal stability thiab thickening cov cuab yeej, ntawm qhov tseem ceeb tshaj plaws Performance index yog dej tuav.
Muaj plaub hom dej tuav cov neeg ua haujlwm:
① Cellulosic dej tuav tus neeg sawv cev
Tam sim no, feem ntau siv hauv kev lag luam yog hydroxypropyl methylcellulose, ua raws li methyl cellulose thiab carboxymethyl cellulose. Tag nrho cov kev ua tau zoo ntawm hydroxypropyl methylcellulose yog zoo dua li ntawm methylcellulose, thiab cov dej tuav ntawm ob yog ntau dua li carboxymethylcellulose, tab sis cov thickening nyhuv thiab bonding nyhuv yog phem tshaj cov carboxymethylcellulose. Hauv cov khoom siv hauv tsev gypsum qhuav sib xyaw, cov nyiaj ntawm hydroxypropyl thiab methyl cellulose feem ntau yog 0.1% txog 0.3%, thiab cov carboxymethyl cellulose yog 0.5% txog 1.0%. Ntau tus qauv ntawm daim ntawv thov ua pov thawj tias kev siv ua ke ntawm ob qhov zoo dua.
② Starch water retaining agent
Starch dej tuav tus neeg saib xyuas yog tsuas yog siv rau gypsum putty thiab nto plaster plaster, thiab yuav hloov ib feem los yog tag nrho cov cellulose dej tuav tus neeg saib xyuas. Ntxiv cov hmoov txhuv nplej siab-raws li dej-cov neeg sawv cev rau gypsum qhuav hmoov cov ntaub ntawv hauv tsev tuaj yeem txhim kho kev ua haujlwm, ua haujlwm tau zoo, thiab sib xws ntawm slurry. Feem ntau siv cov hmoov txhuv nplej siab raws li cov dej khaws cia muaj xws li tapioca starch, pregelatinized starch, carboxymethyl starch, thiab carboxypropyl starch. Tus nqi ntawm cov hmoov txhuv nplej siab raws li cov dej khaws cia feem ntau yog 0.3% mus rau 1%. Yog tias qhov nyiaj ntau dhau lawm, nws yuav ua rau cov kab mob mildew ntawm gypsum khoom nyob rau hauv ib qho chaw ntub dej, uas yuav cuam tshuam ncaj qha rau qhov zoo ntawm qhov project.
③ Cov kua nplaum tuav dej
Qee cov nplaum tam sim no tuaj yeem ua lub luag haujlwm khaws dej zoo dua. Piv txwv li, 17-88, 24-88 polyvinyl cawv hmoov, Tianqing cov pos hniav thiab guar cov pos hniav yog siv nyob rau hauv gypsum qhuav-siv tsev cov ntaub ntawv xws li gypsum, gypsum putty, thiab gypsum rwb thaiv tsev kua nplaum. Yuav txo tau cov cellulose dej tuav tus neeg sawv cev. Tshwj xeeb tshaj yog nyob rau hauv fast-bonding gypsum, nws muaj peev xwm kiag li hloov cellulose ether dej-retaining tus neeg saib xyuas nyob rau hauv tej rooj plaub.
④ Inorganic dej tuav cov ntaub ntawv
Daim ntawv thov kev sib xyaw ua ke ntawm lwm cov ntaub ntawv khaws cia hauv gypsum qhuav-sib tov lub tsev cov ntaub ntawv tuaj yeem txo cov nqi ntawm lwm cov ntaub ntawv khaws dej, txo cov nqi khoom, thiab tseem ua lub luag haujlwm hauv kev txhim kho kev ua haujlwm thiab kev tsim kho ntawm gypsum slurry. Feem ntau siv inorganic dej-retaining cov ntaub ntawv muaj xws li bentonite, kaolin, diatomaceous ntiaj teb, zeolite hmoov, perlite hmoov, attapulgite av nplaum, thiab lwm yam.
05.Adhesive
Daim ntawv thov ntawm cov nplaum nyob rau hauv gypsum qhuav-sib tov lub tsev cov ntaub ntawv yog thib ob tsuas yog rau cov dej-retaining agents thiab retarders. Gypsum self-leveling mortar, bonded gypsum, caulking gypsum, thiab thermal rwb thaiv tsev gypsum kua nplaum yog tag nrho inseparable los ntawm cov nplaum.
▲ Redispersible latex hmoov
Redispersible latex hmoov yog dav siv nyob rau hauv gypsum self-leveling mortar, gypsum rwb thaiv tsev compound, gypsum caulking putty, thiab lwm yam. Tshwj xeeb tshaj yog nyob rau hauv gypsum self-leveling mortar, nws muaj peev xwm txhim kho lub viscosity thiab fluidity ntawm slurry, thiab kuj plays lub luag hauj lwm zoo ntawm kev txo. delamination, tsis txhob los ntshav, thiab txhim kho kev sib tsoo. Qhov ntau npaum yog 1.2% mus rau 2.5%.
▲ Instant polyvinyl cawv
Tam sim no, instant polyvinyl cawv siv nyob rau hauv ib tug loj npaum li cas nyob rau hauv lub lag luam yog 24-88 thiab 17-88. Nws yog feem ntau siv hauv cov khoom xws li kev sib txuas gypsum, gypsum putty, gypsum composite thermal rwb thaiv tsev compound, thiab plastering plaster. 0.4% mus rau 1.2%.
Guar gum, Tianqing gum, carboxymethyl cellulose, starch ether, thiab lwm yam yog tag nrho cov adhesives nrog sib txawv kev sib txuas ua haujlwm nyob rau hauv gypsum qhuav-sib tov lub tsev ntaub ntawv.
06. Thickener
Thickening yog tsuas yog los txhim kho kev ua haujlwm thiab sagging ntawm gypsum slurry, uas zoo ib yam li cov nplaum thiab cov dej khaws cia, tab sis tsis tag. Qee cov khoom siv thickener muaj txiaj ntsig zoo hauv kev ua kom tuab, tab sis tsis zoo tagnrho rau kev sib zog sib zog thiab tuav dej. Thaum tsim cov gypsum qhuav hmoov cov ntaub ntawv hauv tsev, lub luag haujlwm tseem ceeb ntawm cov khoom sib xyaw yuav tsum tau txiav txim siab tag nrho txhawm rau txhawm rau siv cov khoom sib xyaw kom zoo dua thiab tsim nyog. Feem ntau siv cov khoom thickener muaj xws li polyacrylamide, Tianqing gum, guar gum, carboxymethyl cellulose, thiab lwm yam.
07. Tus neeg saib xyuas huab cua
Cua-entraining tus neeg saib xyuas, tseem hu ua foaming tus neeg sawv cev, yog tsuas yog siv nyob rau hauv gypsum qhuav-siv tsev ntaub ntawv xws li gypsum rwb thaiv tsev compound thiab plaster plaster. Cua-entraining tus neeg saib xyuas (foaming agent) pab txhim kho kev tsim kho, tawg tiv thaiv, tiv thaiv te, txo los ntshav thiab cais tawm, thiab qhov ntau npaum li cas feem ntau yog 0.01% txog 0.02%.
08. Defoamer
Defoamer feem ntau yog siv hauv gypsum self-leveling mortar thiab gypsum caulking putty, uas tuaj yeem txhim kho qhov ceev, lub zog, dej tsis kam thiab cohesiveness ntawm slurry, thiab qhov ntau npaum li cas feem ntau yog 0.02% txog 0.04%.
09. Dej txo tus neeg sawv cev
Dej txo tus neeg sawv cev tuaj yeem txhim kho cov dej ntws ntawm gypsum slurry thiab lub zog ntawm gypsum hardened lub cev, thiab feem ntau yog siv hauv gypsum self-leveling mortar thiab plaster plaster. Tam sim no, cov khoom tsim tawm hauv tsev tau raug ntsuas raws li lawv cov dej ntws thiab lub zog: polycarboxylate retarded water reducers, melamine high-efficiency water reducers, tea-based high-efficiency retarded water reducers, thiab lignosulfonate water reducers. Thaum siv cov dej txo cov neeg ua haujlwm hauv gypsum qhuav-sib tov cov khoom siv hauv tsev, ntxiv rau kev xav txog kev siv dej thiab lub zog, kev saib xyuas yuav tsum tau them rau lub sijhawm teem sijhawm thiab cov dej tsis zoo ntawm cov khoom siv hauv tsev gypsum dhau sijhawm.
10. Waterproofing tus neeg saib xyuas
Qhov loj tshaj ntawm cov khoom gypsum yog cov dej tsis zoo. Cov cheeb tsam uas muaj huab cua siab muaj kev xav tau ntau dua rau cov dej tsis kam ntawm gypsum qhuav-siv mortar. Feem ntau, cov dej tsis kam ntawm hardened gypsum yog txhim kho los ntawm kev ntxiv cov khoom siv hydraulic. Nyob rau hauv cov ntaub ntawv ntawm cov dej ntub dej los yog cov dej saturated, sab nraud ntxiv ntawm hydraulic admixtures tuaj yeem ua rau lub softening coefficient ntawm gypsum hardened lub cev ncav cuag ntau tshaj 0.7, thiaj li ua tau raws li cov khoom yuav tsum tau muaj zog. Tshuaj admixtures kuj tseem siv tau los txo cov solubility ntawm gypsum (uas yog, ua kom cov softening coefficient), txo cov adsorption ntawm gypsum rau dej (uas yog, txo cov dej nqus tus nqi) thiab txo qhov yaig ntawm gypsum hardened lub cev (uas yog. , dej cais). Gypsum waterproofing agents muaj xws li ammonium borate, sodium methyl siliconate, silicone resin, emulsified paraffin wax, thiab silicone emulsion waterproofing tus neeg saib xyuas nrog cov nyhuv zoo dua.
11. Active stimulator
Kev ua kom lub ntuj thiab tshuaj anhydrites imparts adhesiveness thiab lub zog rau kev tsim cov gypsum qhuav-sib tov tsev cov ntaub ntawv. Cov kua qaub activator tuaj yeem ua kom lub cev qhuav dej thaum ntxov ntawm anhydrous gypsum, txo lub sijhawm teeb tsa, thiab txhim kho lub zog thaum ntxov ntawm gypsum hardened lub cev. Qhov yooj yim activator muaj me ntsis cuam tshuam rau cov dej thaum ntxov ntawm anhydrous gypsum, tab sis nws tuaj yeem txhim kho lub zog tom qab ntawm gypsum hardened lub cev, thiab tuaj yeem ua ib feem ntawm cov khoom siv hydraulic gelling hauv gypsum hardened lub cev, zoo txhim kho cov dej tsis kam. lub gypsum hardened lub cev pw ua ke. Kev siv cov nyhuv ntawm acid-base compound activator yog zoo dua li ntawm ib qho acidic los yog yooj yim activator. Acid stimulants muaj xws li potassium alum, sodium sulfate, potassium sulfate, thiab lwm yam. Alkaline activators muaj xws li quicklime, cement, cement clinker, calcined dolomite, thiab lwm yam.
12. Thixotropic lubricant
Thixotropic lubricants yog siv nyob rau hauv nws tus kheej-leveling gypsum los yog plastering gypsum, uas yuav txo tau cov ndlwg tsis kam ntawm gypsum mortar, ncua lub sij hawm qhib, tiv thaiv cov txheej thiab kev sib hais haum ntawm slurry, kom lub slurry tau zoo lubrication thiab workability. Nyob rau tib lub sijhawm, cov qauv ntawm lub cev tsis sib xws, thiab nws lub zog saum npoo yog nce.
Post lub sij hawm: Apr-20-2023