Muaj kev txwv hauv kev txhim kho kev ua haujlwm ntawm gypsum muab tshuaj txhuam los ntawm ib qho kev sib xyaw.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 khoom siv yuav tsum tau ua kom sib xyaw thiab sib xyaw ua ke nrog kev tshawb fawb thiab tsim nyog.
1. Cov coagulant
Regulating coagulant feem ntau muab faib ua retarder thiab coagulant.Nyob rau hauv gesso qhuav mix mortar, cov khoom uas siv gesso siav los ua tag nrho siv ncua coagulate tus neeg saib xyuas, siv anhydrous gesso los yog cov khoom uas siv 2 dej gesso los ua kom ncaj qha los txhawb coagulate tus neeg saib xyuas.
2. Retarder
Los ntawm kev ntxiv retarder rau gypsum qhuav sib xyaw cov khoom siv hauv tsev, cov txheej txheem hydration ntawm semi-hydrous gypsum yog inhibited thiab lub sij hawm solidification yog ntev.Lub hydration tej yam kev mob ntawm gypsum plaster yog ntau yam, nrog rau cov theem muaj pes tsawg leeg ntawm gypsum plaster, kub ntawm gypsum khoom, particle fineness, teem sij hawm thiab pH tus nqi ntawm cov khoom tiav.Txhua yam muaj qee yam cuam tshuam rau qhov cuam tshuam ntawm retarding, yog li muaj qhov sib txawv loj ntawm tus neeg saib xyuas retarding nyob rau hauv cov xwm txheej sib txawv.Tam sim no, qhov zoo dua hauv tsev gypsum tshwj xeeb retarder yog metamorphic protein (high protein) retarder, nws muaj qhov zoo ntawm tus nqi qis, lub sij hawm ntev retarder, me me zog poob, kev tsim kho zoo, qhib lub sij hawm ntev thiab lwm yam.Hauv qab hom stucco gypsum npaj tus nqi feem ntau yog 0.06% ~ 0.15%.
3. Cov coagulant
Accelerating lub sij hawm stirring ntawm slurry thiab ncua lub stirring ceev ntawm slurry yog ib qho ntawm lub cev txoj kev los txhawb coagulation.Cov tshuaj coagulants feem ntau siv hauv cov khoom siv hauv tsev tsis muaj dej gypsum yog potassium chloride, potassium silicate, sulfate thiab lwm yam acids.Qhov ntau npaum yog 0.2% ~ 0.4%.
4. Tus neeg saib xyuas dej
Gesso qhuav mix cov ntaub ntawv hauv tsev tsis tuaj yeem tawm ntawm tus neeg saib xyuas dej.Txhawm rau txhim kho cov dej tuav tus nqi ntawm gypsum khoom slurry yog los xyuas kom meej tias cov dej tuaj yeem nyob hauv gypsum slurry rau lub sijhawm ntev kom tau txais cov dej zoo thiab cov nyhuv tawv.Txhim kho qhov 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 cov slurry ntws dai, ncua lub sijhawm qhib, daws cov teeb meem engineering zoo xws li tawg thiab khoob nruas yog sib cais los ntawm cov dej tuav tus neeg saib xyuas.Txawm hais tias tus neeg saib xyuas cov dej khaws cia yog qhov zoo tshaj plaws nyob ntawm nws qhov dispersibility, solubility ceev, molding, thermal stability thiab thickening, ntawm cov dej tuav yog qhov tseem ceeb tshaj plaws Performance index.
Cellulose ether water-retaining agent
Tam sim no, hydroxypropyl methyl cellulose yog siv dav hauv kev ua lag luam, ua raws li methyl cellulose, thiab carboxymethyl cellulose.Cov khoom zoo ntawm hydroxypropyl methyl cellulose zoo dua li methyl cellulose.Cov dej tuav ntawm hydroxypropyl methyl cellulose yog ntau dua li ntawm carboxymethyl cellulose, tab sis cov nyhuv thickening thiab kev sib raug zoo yog phem dua li carboxymethyl cellulose.Hauv gypsum qhuav sib xyaw cov khoom siv hauv tsev, tus nqi ntawm hydroxypropyl thiab methyl cellulose yog nyob rau hauv thaj tsam ntawm 0.1% ~ 0.3%, thiab cov carboxymethyl cellulose yog nyob rau hauv thaj tsam ntawm 0.5% ~ 1.0%.
Starch water-retaining agent
Cov hmoov txhuv nplej siab tiv thaiv dej tus neeg sawv cev yeej siv ntawm gesso be putty hauv menyuam yaus, lub ntsej muag txheej qauv stucco gesso, tuaj yeem hloov ib nrab lossis tag nrho cellulose yam tiv thaiv dej.Kev ua haujlwm tau zoo, kev tsim kho thiab sib xws ntawm slurry tuaj yeem txhim kho los ntawm kev ntxiv cov hmoov txhuv nplej siab cov dej khaws cia rau gypsum qhuav cov ntaub ntawv hauv tsev.Feem ntau siv cov hmoov txhuv nplej siab cov dej tuav cov khoom lag luam yog cov hmoov txhuv nplej siab, cov hmoov txhuv nplej siab ua ntej gelatinized, carboxymethyl starch, carboxypropyl starch.Cov hmoov txhuv nplej siab tiv thaiv dej tus neeg sawv cev ntau npaum li cas hauv 0.3% ~ 1% feem ntau, yog tias ntau npaum li cas lub rooj sib tham loj dhau ua rau cov khoom lag luam tsim cov kab mob mildew hauv qab qhov chaw ntub dej, cuam tshuam rau qhov project zoo.
③ Glue type water retaining agent
Qee cov nplaum tam sim no tuaj yeem ua lub luag haujlwm zoo dua hauv kev tuav dej.Xws li 17-88, 24-88 polyvinyl cawv hmoov, cov pos hniav ntsuab thiab guar cov pos hniav siv rau kev sib txuas ntawm gypsum, gypsum putty, gypsum rwb thaiv tsev kua nplaum thiab lwm yam gypsum qhuav tov khoom, nyob rau hauv ib tug tej yam nqi ntawm cov ntaub ntawv, yuav txo tau tus nqi ntawm. cellulose dej retention agent.Tshwj xeeb tshaj yog nyob rau hauv ceev sticking gypsum, nws muaj peev xwm hloov cellulose ethers nyob rau hauv tej rooj plaub.
(4) Inorganic dej tuav cov ntaub ntawv
Kev siv cov khoom sib xyaw ua ke ntawm lwm cov dej khaws cia hauv gypsum qhuav cov ntaub ntawv sib xyaw ua ke tuaj yeem txo cov khoom siv dej khaws cia, txo cov nqi ntawm cov khoom, thiab txhim kho kev ua haujlwm thiab kev tsim kho ntawm gypsum slurry.Feem ntau siv cov dej tsis muaj dej khaws cia yog bentonite, kaolin, diatomite, zeolite hmoov, perlite hmoov, attapulgite av nplaum, thiab lwm yam.
5. Adhesive
Daim ntawv thov ntawm cov nplaum nyob rau hauv gypsum qhuav sib xyaw cov ntaub ntawv hauv tsev tsuas yog qis dua rau cov dej tuav tus neeg saib xyuas thiab cov retarder.Gesso tus kheej leveling mortar, nplaum gesso, caulking gesso, kub preservation gesso kua nplaum tsis tuaj yeem tawm tus neeg sawv cev.
Redispersible latex hmoov:
Redispersible latex hmoov yog dav siv nyob rau hauv gypsum self-leveling mortar, gypsum rwb thaiv tsev kua nplaum, gypsum caulking putty thiab hais txog.Tshwj xeeb tshaj yog nyob rau hauv gypsum self-leveling mortar, nws muaj peev xwm ua rau lub slurry viscidity, zoo fluidity, kom txo tau stratification, tsis txhob los ntshav, txhim kho tawg kuj thiab lwm yam kuj ua lub luag hauj lwm zoo.Kev siv feem ntau yog 1.2% ~ 2.5%.
Instant polyvinyl cawv:
Tam sim no, instant yaj polyvinyl cawv nrog ntau npaum li cas ntawm kev ua lag luam yog 24-88, 17-88 cov khoom ntawm ob lub qauv, feem ntau siv ntawm nplaum plaster, gesso, gesso compound tshav kub preservation kua nplaum, stucco plaster thiab lwm yam khoom, ntau npaum li cas. nyob rau hauv 0.4% ~ 1.2% feem ntau.
Guar gum, teb gelatin, carboxymethyl cellulose, hmoov txhuv nplej siab ether thiab lwm yam yog adhesives nrog sib txawv kev sib txuas ua haujlwm nyob rau hauv gypsum qhuav tov khoom tsev.
6. Thickener
Thickening yog tsuas yog los txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm gypsum slurry, uas zoo ib yam li cov nplaum thiab dej tuav tus neeg sawv cev, tab sis tsis tag.Qee cov khoom lag luam thickening yog qhov zoo hauv cov nyhuv thickening, tab sis kev hwm tsis zoo nyob rau hauv cohesive quab yuam, dej tuav tus nqi.Thaum ua cov gypsum qhuav hmoov cov ntaub ntawv hauv tsev, cov nyhuv tseem ceeb ntawm cov khoom sib xyaw yuav tsum tau txiav txim siab tag nrho kom siv cov khoom sib xyaw kom zoo dua thiab tsim nyog.Feem ntau siv cov khoom thickener yog polyacrylamide, cov pos hniav ntsuab, guar gum, carboxymethyl cellulose.
7. Air-entraining tus neeg saib xyuas
Huab cua entraining tus neeg sawv cev tseem hu ua foaming tus neeg saib xyuas, feem ntau yog siv hauv gypsum rwb thaiv tsev kua nplaum, plaster plaster thiab lwm yam gypsum qhuav sib xyaw cov ntaub ntawv hauv tsev.Cua entraining tus neeg saib xyuas (foaming tus neeg sawv cev) pab txhim kho kev tsim kho, tawg tsis kam, Frost tsis kam, txo los ntshav thiab cais qhov tshwm sim, qhov ntau npaum li cas yog 0.01% ~ 0.02%.
8. Defoaming tus neeg sawv cev
Defoaming tus neeg sawv cev feem ntau yog siv rau ntawm gesso self-leveling mortar, gesso caulking yuav putty nyob rau hauv, tuaj yeem nce qhov ceev ntawm cov ntaub ntawv pulp, lub zog, dej tsis kam, caking deev, ntau npaum li cas nyob rau hauv 0.02% ~ 0.04% feem ntau.
9. Dej txo tus neeg sawv cev
Txo tus neeg sawv cev dej tuaj yeem txhim kho gesso slurry fluidity thiab gesso hardening lub cev muaj zog, feem ntau ntawm gesso self leveling mortar, stucco gesso.Tam sim no, tus neeg saib xyuas dej hauv tsev yog polycarboxylic acid retarding dej txo tus neeg saib xyuas, melamine high-efficiency dej txo tus neeg saib xyuas, tshuaj yej system high-efficiency retarding dej txo tus neeg saib xyuas, lignosulfonate dej txo tus neeg saib xyuas raws li fluidity thiab lub zog.Ntxiv nrog rau kev siv dej thiab lub zog, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo saib xyuas lub sijhawm teeb tsa thiab qhov dej tsis zoo ntawm cov khoom siv hauv tsev gypsum thaum siv cov dej txo tus neeg sawv cev hauv gypsum qhuav cov khoom siv hauv tsev.
10. Waterproofing tus neeg saib xyuas
Qhov loj tshaj qhov tsis xws ntawm cov khoom gypsum yog cov dej tsis zoo.Cov cheeb tsam uas muaj huab cua loj dua muaj cov dej tsis kam tiv thaiv ntau dua rau gypsum qhuav sib xyaw mortar.Feem ntau, cov dej tsis kam ntawm gypsum hardened lub cev yog txhim kho los ntawm kev ntxiv hydraulic admixture.Nyob rau hauv cov xwm txheej ntawm cov dej ntub dej los yog cov dej saturated, softening coefficient ntawm gypsum hardened lub cev tuaj yeem ncav cuag 0.7, thiaj li ua tau raws li qhov yuav tsum tau ua ntawm cov khoom muaj zog.Tshuaj admixtures kuj tseem siv tau los txo cov solubility ntawm gypsum (uas yog, ua kom softening coefficient), txo qhov nqus ntawm gypsum rau dej (uas yog, txo cov dej nqus) thiab txo qhov yaig ntawm gypsum hardened lub cev (uas yog, dej. isolation) txoj kev tiv thaiv dej.Gypsum waterproof agent muaj ammonium borate, methyl sodium silicate, silicone resin, mis fossil wax, cov nyhuv yog zoo dua thiab silicone emulsion waterproof tus neeg saib xyuas.
11. Tus ua kom muaj zog
Ntuj thiab tshuaj anhydrous gypsum tuaj yeem qhib tau los ua kom nws nplaum thiab muaj zog, thiaj li tsim nyog rau kev tsim cov khoom siv gypsum qhuav sib xyaw.Acid 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.Alkaline activator muaj qhov cuam tshuam me ntsis ntawm 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 hydraulic cementing khoom hauv gypsum hardened lub cev, uas zoo txhim kho cov dej tsis kam ntawm gypsum hardened lub cev. .Daim ntawv thov cov nyhuv ntawm acid-base compound activator yog zoo dua li ntawm ib qho kua qaub los yog yooj yim activator.Acid activators suav nrog potassium alum, sodium sulfate, potassium sulfate thiab lwm yam.Alkaline activators suav nrog quicklime, cement, cement clinker, calcined dolomite thiab lwm yam.
Thixotropic lubricant
Thixovariable lubricant yog siv nyob rau hauv nws tus kheej-leveling gypsum los yog stuccoing gypsum, uas yuav txo tau cov ndlwg tsis kam ntawm gypsum mortar, ncua lub sij hawm qhib, tiv thaiv lub stratification thiab kev sib haum xeeb ntawm slurry, thiaj li ua kom slurry tau zoo lubrication thiab kev tsim kho, thaum ua lub hardened lub cev qauv uniform, ua kom nws lub zog nto.
Post lub sij hawm: May-25-2022