Ntoo pallet tu txoj kev

Ntoo blackboards tsis muaj lub neej ruaj khov thiab, nrog kev saib xyuas kom zoo, tuaj yeem siv tau ntev (5-}10 xyoo los yog tas mus li). Lawv lub neej nyob ntawm qhov hnav, ntoo tawg, thiab kev ncaj ncees ntawm cov qauv kev txhawb nqa, tsis zoo li cov khoom noj khoom haus sib cuag ntoo uas yuav tsum tau hloov cov qauv.

Core Lifespan Assessment

Theoretical Lifespan: Yog tias tsuas yog siv los ua kev sau ntawv thiab kho kom zoo nkauj thiab tiv thaiv los ntawm tshav ntuj ncaj qha thiab ya raws, cov ncej ntoo thiab kev txhawb nqa tuaj yeem kav ntev dua 10 xyoo.Qhov saum npoo (greenboard / blackboard xim txheej) tuaj yeem tsim khawb lossis kev cuam tshuam nrog kev siv, tab sis nws txoj haujlwm tsis zoo li ua tsis tiav.

Cov Teeb Meem Ua Tsis Taus: Hloov lossis kho yog tsim nyog thaum tawg loj lossis deformation, tawg lossis xoob kev them nyiaj yug, loj - thaj tsam ntawm txheej txheej, lossis pwm loj hlob tshwm sim.Nws tsis muaj sijhawm txwv.

Kev sib piv Misconception: Tsis txhob xa mus rau "6-12 lub hlis hloov" tus qauv rau cov laug cam.Blackboards tsis tuaj rau hauv kev sib cuag nrog cov zaub mov los yog tau soaked nyob rau hauv dej, thiab tsis muaj yuav tsum tau hloov vim cov kab mob loj hlob.Key Factors cuam tshuam Lifespan

Environmental Humidity: Ntev dampness ua rau ntoo nqus dej noo, o, pwm, thiab tawg; qhuav thiab ncaj qha tshav ntuj ua rau shrinkage tawg.Ua kom zoo qhov cua thiab qhov chaw txias, ntxoov ntxoo.

Kev siv ntau zaus: Kev so nrawm nrawm nrawm rau ntawm cov txheej txheej saum npoo thiab ua rau muaj kev pheej hmoo ntawm kev puas tsuaj rau lub thav duab ntoo. Qee zaus siv cov hniav tuaj yeem khaws cov ntoo yuav luag tas mus li.

Txoj kev ntxuav: Tsis txhob ntub dej los yog ntxuav nrog cov kua qaub lossis alkalis. So nrog ib daim ntaub qhuav los yog me ntsis ntub dej. Kev siv cov roj ntoo tsis tu ncua tuaj yeem ua rau nws lub neej ntev.

Cov qauv thiab cov khoom siv: Cov khoom siv ntoo yog cov resistant rau kev laus dua li cov boards.Yog hais tias qhov saum npoo muaj ib tus neeg cov tshuaj tsuag txheej, nws tuaj yeem rov ua dua thiab kho dua tshiab tom qab hnav, tsis tas yuav muab pov tseg tag nrho.

Cov lus pom zoo rau Extending Lifespan:

Kev Saib Xyuas Txhua Hnub: Siv cov zaub mov- qib ntxhia roj lossis beeswax peb lub hlis twg los tiv thaiv cov ntoo kom tawg.

Cia Cwj Pwm: Dai lossis sawv ntsug, zam kev sib cuag nrog cov phab ntsa kom tiv thaiv kev nqus dej los yog deformation los ntawm cov khoom hnyav. Cov tswv yim kho: Cov kab nrib pleb me tuaj yeem ntim nrog cov nplaum ntoo; qhov muag plooj tuaj yeem rov ua dua - xuab zeb thiab rov ua dua; cov kev txhawb nqa tawg tuaj yeem txhim kho thiab kho.