Puas yog qhov tshwm sim ntawm efflorescence nyob rau hauv mortar muaj feem xyuam rau hydroxypropyl methylcellulose?

Qhov tshwm sim ntawm efflorescence yog: cov pob zeb zoo tib yam yog silicate, thiab thaum nws ntsib huab cua lossis ya raws hauv phab ntsa, silicate ion dhau los ua cov tshuaj tiv thaiv hydrolysis, thiab cov hydroxide generated ua ke nrog cov hlau ions los tsim cov hydroxide uas tsis muaj solubility (cov khoom siv tshuaj yog Alkaline), thaum kub nce, cov dej vapor evaporates, thiab hydroxide yog precipitated los ntawm phab ntsa. Nrog rau maj mam evaporation ntawm dej, cov hydroxide yog precipitated rau saum npoo ntawm cov pob zeb cement. Sij hawm dhau mus, cov xim zoo nkauj qub Los yog cov xim pleev xim thiab lwm yam raug tshem tawm thiab tsis ua raws li phab ntsa, thiab kev ua kom dawb, tev, thiab tev yuav tshwm sim. Cov txheej txheem no hu ua "pan-alkali". Yog li, nws tsis yog ubiquinol tshwm sim los ntawm hydroxypropyl methylcellulose.

Tus neeg siv khoom tau hais tias qhov tshwm sim: cov tshuaj tsuag uas nws tau ua yuav muaj yias-alkali rau ntawm phab ntsa pob zeb, tab sis yuav tsis tshwm rau ntawm phab ntsa ci ntsa iab, uas qhia tau hais tias cov silicic acid nyob rau hauv cov cement siv rau ntawm phab ntsa pob zeb ntau ntsev ntau heev (kom muaj zog. alkaline ntsev). Efflorescence tshwm sim los ntawm evaporation ntawm dej siv nyob rau hauv cov tshuaj tsuag grouting. Txawm li cas los xij, tsis muaj silicate rau ntawm phab ntsa cib raug rho tawm thiab tsis muaj efflorescence yuav tshwm sim. Yog li ntawd, qhov tshwm sim ntawm efflorescence tsis muaj dab tsi ua nrog tshuaj tsuag.

Kev daws

1. Cov ntsiab lus silicate ntawm lub hauv paus pob zeb cement yog txo.

2. Siv cov tshuaj tiv thaiv-alkali rov qab txheej txheej, cov tshuaj nkag mus rau hauv lub pob zeb los thaiv cov hlab ntsha, kom dej, Ca(OH) 2, ntsev thiab lwm yam khoom tsis tuaj yeem nkag mus, thiab txiav tawm txoj hauv kev ntawm yias-alkaline tshwm sim.

3. Txhawm rau tiv thaiv dej nkag, tsis txhob nchuav dej ntau ua ntej kev tsim kho.

Kev kho ntawm pan-alkaline phenomenon

Cov pob zeb efflorescence tu tus neeg sawv cev ntawm lub khw tuaj yeem siv. Tus neeg saib xyuas no yog cov kua tsis muaj xim tsis muaj xim ua los ntawm cov tsis-ionic surfactants thiab cov kuab tshuaj. Nws muaj qee yam cuam tshuam rau kev ntxuav ntawm qee qhov ntuj pob zeb. Tab sis ua ntej siv, nco ntsoov ua ib qho piv txwv me me los ntsuas cov nyhuv thiab txiav txim siab seb puas yuav siv nws.