Dab tsi yog Cov Kua Dej Tsis Muaj (qis) Alkali Quick-setting Agents?

Cov kua dej tsis muaj (qis) alkali ceev-teeb cov neeg ua haujlwm yog cov khoom siv tshuaj lom neeg uas ua rau muaj kev kub ceev thiab ua kom tawv nqaij ntawm cov cement paste, mortar, lossis pob zeb tsis muaj kev cuam tshuam rau lawv lub zog mus ntev. Cov neeg ua haujlwm ceev ceev tuaj yeem muab faib ua cov hmoov thiab cov ntaub ntawv ua kua raws li lawv daim ntawv muab khoom; lawv tuaj yeem muab faib ua alkaline thiab tsis muaj (qis) alkali hom raws li cov khoom lag luam acidity thiab alkalinity.

Hauv kev tsim kho engineering, kom txo qis cov plua plav uas tsim los ntawm kev siv tshuaj tsuag qhuav thiab kev puas tsuaj rau cov neeg ua haujlwm tsim kho, txo tus nqi rov qab ntawm cov pob zeb txau, thiab txhim kho kev tsim kho kom zoo thiab kev ua haujlwm zoo, kev ua haujlwm ntub dej tau txhawb nqa hauv cov haujlwm tiag tiag. Kev ua haujlwm ntub dej yuav tsum tau siv cov kua ceev-teeb cov neeg ua haujlwm, yog li qhov tshwm sim ntawm cov neeg ua haujlwm ceev ceev.

Daim ntawv thov kev tshawb fawb ntawm cov kua tsis muaj (qis) alkali ceev-teeb neeg ua hauj lwm yog tseem nyob rau hauv nws thawj theem nyob rau hauv domestically, thiab lawv feem nyob rau hauv ceev-teeb neeg sawv cev cov khoom yog me me. Nyob rau hauv xyoo tas los no, nrog rau daim ntawv thov ntawm cov kua tsis muaj (qis) alkali ceev-teeb neeg ua hauj lwm los ntawm thoob ntiaj teb cov hom xws li Sika nyob rau hauv ib co loj-scale hydropower tej yaam num nyob rau hauv Tuam Tshoj, txoj kev loj hlob ntawm domestic kua tsis muaj (qis) alkali ceev-setting agents tau nce. rau qee qhov.

Cov tshuaj ua kua ceev ceev muaj xws li sodium silicate type, sodium aluminate type, aluminium sulfate type, thiab potassium aluminium sulfate type fast-set agents. Cov sodium silicate hom kua ceev-setting tus neeg saib xyuas feem ntau muaj cov iav dej (Na2SiO3), ua ke nrog cov poov tshuaj dichromate, sodium nitrite, thiab triethanolamine, thiab tus neeg saib xyuas ceev no yog alkaline heev. Sodium aluminate muaj lub siab solubility hauv dej thiab muaj zog alkaline, yog li no hom kev teeb tsa ceev kuj tseem siv los ua tus neeg sawv cev ceev alkaline. Cov kua dej tsis muaj (qis) alkali ceev-teeb cov neeg ua haujlwm tuaj yeem faib raws li hauv qab no:

Aluminium sulfate hom kua ceev-setting tus neeg saib xyuas yog compounded los ntawm anhydrous txhuas sulfate thiab lwm yam Cheebtsam, teej tug mus rau ib hom kua uas tsis muaj alkali ceev-setting tus neeg saib xyuas. Hom kev teeb tsa ceev ceev no muaj ntau ntau yam, thiab muaj qhov sib txawv tseem ceeb hauv cov khoom thiab cov txheej txheem tsim. Tsawg alkali kua ceev-teeb neeg ua hauj lwm nrog txhuas sulfate thiab sodium aluminate raws li cov khoom tseem ceeb muaj kev cuam tshuam me ntsis rau tom qab lub zog ntawm cov cement thiab zoo adaptability rau ntau hom cement. Txawm li cas los xij, tsis tshua muaj alkali kua ceev-teeb cov neeg ua haujlwm nrog aluminium sulfate thiab aluminium hydroxide raws li cov khoom tseem ceeb ua kom yooj yim cov txheej txheem cov tshuaj tiv thaiv los ntawm cov tshuaj tiv thaiv ntawm txhuas sulfate thiab sodium aluminate los tsim aluminium hydroxide thiab tom qab ntawd los tsim polyaluminum sulfate, tab sis xws li cov kua ceev-setting agents. muaj kev ruaj ntseg tsis zoo thiab ua rau nag lossis daus thiab crystallization, uas tsis tsim nyog rau kev cia thiab siv mus ntev. Tsis tas li ntawd, txhuas sulfate kuj tuaj yeem sib xyaw nrog cov tshuaj fluorides, magnesium sulfate, thiab lwm yam khoom siv los tsim cov kua tsis muaj (qis) alkali ceev-setting agents.

Organic-inorganic composite ceev-teeb neeg ua hauj lwm yuav daws tau ntau yam teeb meem ntawm inorganic ceev-teeb neeg ua hauj lwm, xws li txo cov rebound tus nqi ntawm cov pob zeb hauv kev tsim kho los ntawm kev ua kom cov cohesiveness ntawm cov cement slurry.

Kev teeb tsa cov txheej txheem ntawm cov kua tsis muaj (qis) alkali ceev-teeb cov neeg ua haujlwm tuaj yeem ua tiav hauv ob lub ntsiab lus: (1) Los ntawm kev txhawb nqa kev tsim ntau ntawm ettringite kom ua tiav lub hom phiaj; (2) Los ntawm kev txhawb nqa sai hydration ntawm tricalcium aluminate nyob rau hauv cov cement, yog li tsim ib tug interlaced thiab nruj nreem txuas ettringite qauv, uas txhawb kev ceev ceev thiab hardening ntawm cement.

Cov kua dej tsis muaj (qis) alkali ceev-teev cov neeg ua haujlwm feem ntau muaj cov khoom ua kom tuab, uas tuaj yeem txo tus nqi rov qab ntawm cov pob zeb sib xyaw thaum tsim kho, txo cov khoom pov tseg ntawm cov khoom siv raw thiab cov nqi tsim kho, thiab tseem txo cov kev puas tsuaj rau kev noj qab haus huv ntawm cov neeg ua haujlwm tsim kho. los ntawm alkaline ntub-txheej qhob kev tsim kho. Feem ntau, tus nqi rov qab ntawm cov pob zeb txau nrog cov kua ntxiv tsis muaj (qis) alkali ceev-teeb cov neeg ua haujlwm yog li 15% thaum lub sijhawm txhawb nqa qhov, thaum tus nqi rov qab ntawm cov pob zeb txau nrog ntxiv cov tshuaj tua kab mob ceev ceev yog li 30%. Nws yog pov thawj tias kev siv cov kua tsis muaj (qis) alkali ceev-teeb neeg ua haujlwm zoo heev txo tus nqi rov qab ntawm cov pob zeb txau, yog li txo cov nqi tsim kho.