Tsis muaj teeb meem dab tsi ntau qhov kev xaiv ntawm cov niaj hnub plaster compositions, qhov xav tau tas li rau cov neeg siv siv plasters raws li cov khoom xyaw. Ib qho piv txwv yog cov mineral plasters raws li cov cement lossis cement-lime tov. Tsis tas li ntawd, zoo nkauj ntxhia plasters zoo siv rau sab nrauv thiab kho kom zoo sab hauv vaj tse thiab thaj chaw. Kev tsim kho ntawm qhov chaw ntim kho tau yog vim muaj ntau yam khoom siv nyob rau hauv cov khoom muaj nqis ntawm cov ntxhiab plaster sib tov, uas txiav txim xyuas nws lub npe thiab daim ntawv uas los yog hom nto.
Hom tshuaj pleev ntxhw plastering
Ib qho ntawm feem nrov pob zeb hauv av hniav plasters - xuab zeb. Nws lub npe yog vim muaj qhov tshwm sim nyob rau hauv nws muaj pes tsawg leeg ntawm nplua-grained pebbles (grain). Thaum ua ntawv thov rau saum npoo av, ib txheej ("tsho tiv no") nrog lub qauv tsim muaj. Qhov luaj li cas yog nyob ntawm qhov loj ntawm cov pob tw - pebbles. Qhov ntsuas no (qhov loj ntawm cov feem ntawm inclusions feem) yog tau qhia rau lub ntim ntawm cov khoom xov tag. Hniav cov pob zeb hauv plaster ntawm cov pob zeb zoo nkauj siv rau sab hauv thiab sab nrauv tiav cov hauj lwm, nws muaj kev ua haujlwm tsis yooj yim (shockproof, vapor-permeable, resistant rau sab nraud influences thiab kub hloov).
Cov ntxhuav hniav plaster "kab kab kab tshoob" yog tsis nrov dua thiab ua haujlwm zoo tib yam. Nws qhov txawv ntawm pob zeb los yog plaster yog nyob ntawm qhov chaw kho (los ntawm kev pib sib xyaws ntawm pob zeb los yog marble chips), lub "tsho tiv no" yog tsim nrog grooves, zoo li yog noj los ntawm kab npua kab. Nws kuj yuav tsum tau sau tseg tias txhua hom pob zeb hniav dawb plasters, nrog rau façade, muab ntau cov hniav kom yooj yim qiv lawv tus kheej rau nrag.
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