Hauv kev tsim kho thiab sab hauv haum- tawm cov haujlwm, fiber ntau cement boards thiab calcium silicate boards tau dhau los ua cov ntaub ntawv tseem ceeb rau cov phab ntsa muab faib, tshem tawm cov qab nthab, thiab sab nrauv cladding vim lawv qhov hluav taws kub tsis kam, noo noo, thiab lub zog siab. Txawm li cas los xij, cov lus nug tseem ceeb tseem nyob hauv kev lag luam: "Koj lub rooj tsav xwm puas muaj asbestos?"
Txawm hais tias cov qauv hauv tebchaws tau txhawb nqa asbestos ntev ntev - cov khoom pub dawb, qhov tsis sib xws ntawm tus nqi tau ua rau muaj kev lag luam uas muaj asbestos- muaj thiab asbestos- cov khoom pub dawb yog qee zaum sib xyaw lossis muag sib pauv. Rau cov tswv lag luam, cov neeg cog lus dav dav, thiab cov tsim qauv, kev siv tsis zoo ntawm asbestos- muaj cov boards tsis yog tsuas yog muaj kev pheej hmoo ua tsis tau raws li cov qauv kev ua raws li ib puag ncig, tab sis kuj ua rau muaj kev phom sij rau cov neeg nyob hauv qhov chaw ntev -. Vim li cas nws tseem ceeb heev kom paub qhov txawv ntawm "asbestos-muaj" thiab "asbestos-dawb" cov khoom?
Ua ntej delving rau hauv txoj kev sim, peb yuav tsum qhia meej qhov sib txawv ntawm ob.
1. Qhov sib txawv ntawm cov ntsiab lus tseem ceeb
Asbestos-muaj cov boards: Lub hauv paus txhawb nqa fiber ntau yog chrysotile (dawb asbestos). Asbestos fibers yog qhov zoo heev, muaj lub zog tensile siab, thiab pheej yig.
Asbestos-dawb boards: Raws li kev lag luam tus qauv JC/T 412.1 (*Fiber Cement Flat Sheets - Part 1:Asbestos -dawb Fiber Cement Flat Sheets*), cov ntaub ntawv txhawb zog yuav tsum muaj lwm yam xws li ntoo pulp fibers (cellulose fibers), PVA fibers (polyvinyl cawv fibers), los yog PP fibers (polypropylene fibers).
2. Kev noj qab haus huv thiab kev tswj hwm kev pheej hmoo
Asbestos tau raug cais ua pawg 1 carcinogen los ntawm World Health Organization (WHO). Microscopic asbestos fibers yooj yim ua pa; ib zaug nqus tau, lawv nyob mus ib txhis hauv lub ntsws, muaj peev xwm inducing asbestosis los yog pleural mesothelioma.
Kev Ua Raws Li Txoj Haujlwm: Cov ntawv pov thawj lub tsev ntsuab (xws li LEED thiab WELL) thiab feem ntau tsoomfwv cov haujlwm ua haujlwm tau txwv tsis pub siv cov asbestos- muaj cov khoom siv hauv tsev.
Kev Pabcuam Lub Neej: Thaum asbestos boards muaj lub zog siab, lawv nyiam ua nkig tom qab lub sijhawm ntev ntawm qhov chaw ib puag ncig; nyob rau hauv sib piv, siab - zoo asbestos- dawb boards (tshwj xeeb tshaj yog premium boards reinforced nrog PVA fibers) qhia superior toughness thiab durability.