Gypsum board yog cov khoom tseem ceeb rau cov qab nthab thiab cov partitions hauv kev kho kom zoo nkauj niaj hnub, thiab nws qhov zoo cuam tshuam ncaj qha rau ib puag ncig tus phooj ywg, kev zoo nkauj, thiab kev nyab xeeb ntawm lub tsev ib puag ncig.
1. Txheeb xyuas qhov zoo li no: Lub rooj tsavxwm saum npoo yuav tsum tiaj tus yam tsis muaj kab nrib pleb, tsis muaj cov ces kaum, lossis npuas. Lub ntsej muag daim ntawv yuav tsum tau txuas ruaj khov yam tsis muaj tev tawm. High- cov boards zoo muaj daim ntawv muaj zog uas yuav tsis yooj yim tsim kua muag thaum maj mam tev.
2. Txheeb xyuas qhov hnyav thiab lub suab: Rau tib qhov tshwj xeeb, qhov hnyav yuav tsum yog nruab nrab, thiab qhov ceev yuav tsum tsis sib xws hauv koj txhais tes. Lub teeb kais ntawm lub rooj tsavxwm yuav tsum ua kom tob, txawm tias "thump" suab. Lub suab hollow qhia txog cov qauv hauv lub cev xoob thiab tsis muaj zog txaus.
3. Tshawb xyuas cov khoom tseem ceeb: Txiav qhib lub rooj tsavxwm los tshuaj xyuas sab hauv. High- zoo gypsum core yog daus-dawb nrog ob peb impurities; cov khoom uas muaj xim daj lossis greyish cores muaj ntau cov khoom pov tseg, muaj lub zog tsis zoo, thiab muaj qhov nqus dej noo.
