Thaum nws los txog rau cov vaj tsev kho kom zoo nkauj, kev nyab xeeb hluav taws feem ntau yog qhov kev xav tom qab- tej yam tib neeg tsuas xav txog tom qab muaj xwm txheej tshwm sim. Cov neeg siv khoom txawv teb chaws tau siv los ua haujlwm nrog aluminium composite panels (ACP) nquag nug, "Inorganic pre-coated panels yuav tsum tau hluav taws kub- tiv taus. Lawv zoo dua li ACP li cas?"
ACP kub hnyiab vim txoj kev nws tau tsim: ib tug polyethylene yas core sandwiched ntawm ob daim tawv nyias nyias. Polyethylene muaj cov pob txha hydrocarbon, uas txhais tau hais tias nws ntim ntau lub zog - qhov tseem ceeb, nws yog ib qho roj. Ntxiv nplaim retardants rau lub hauv paus tsuas yog nce qhov kub ntawm qhov uas nws ignites. Nws tsis hloov qhov tseeb tias cov yas nws tus kheej yog combustible. Inorganic pre-coated panels txawv kiag li. Lawv cov substrate yog fiber ntau-cov gypsum board ua rau feem ntau ntawm gypsum, inorganic fibers, thiab cov ntxhia hauv cov ntxhia. Cov txheej txheej saum npoo siv cov khoom siv tsis zoo xws li silicates. Los ntawm cov tub ntxhais mus rau sab nrauv, tsis muaj cov organic resins{10}}tsuas yog tsis muaj dab tsi hauv lub vaj huam sib luag tuaj yeem txhawb nqa nplaim taws. Kev tiv thaiv hluav taws yog tsim rau hauv cov khoom siv nws tus kheej.
Yuav ua li cas ob lub vaj huam sib luag hnov qab hauv hluav taws ua rau qhov sib txawv txawm pom tseeb. Cov nplaim hluav taws ua rau lub cev qhuav dej ntawm ACP cov yas yas, uas tom qab ntawd poob thaum lawv hlawv. Cov nplaim hluav taws kub no tuaj yeem cuam tshuam dab tsi hauv qab no thiab kis cov nplaim taws mus rau sab saud, ua rau nws yuav luag tsis tuaj yeem ntim lawv. Tsis tas li ntawd, cov yas uas tsis hlawv ua rau cov pa luam yeeb dub thiab cov pa roj carbon monoxide. Cov ntaub ntawv hluav taws kub tau hais tias cov pa luam yeeb thiab cov pa lom neeg raug tsim txom muaj ntau dua li cov hluav taws kub ncaj qha vim kev nqus pa. Ntxiv mus, cov pa luam yeeb tuab tuab txo qhov pom thiab ua rau nws tsis tuaj yeem khiav hauv ob peb feeb. Cov ntaub ntawv xws li inorganic pre-coated panels tsis coj li no. Lawv tsis tsim nplaim taws, drips, los yog pa luam yeeb. Cov lus piav qhia rau qhov no yog tias gypsum muaj dej khi rau hauv nws daim ntawv siv lead ua. Thaum raug cua sov, cov dej no tawm hauv daim ntawv ntawm vapor. Xws li vaporization absorbs ib qho tseem ceeb ntawm cov cua sov thiab tiv thaiv lub vaj huam sib luag qhov kub thiab txias los ntawm drastic. Tsis tas li ntawd, cov chav dilutes gases, yog li diminishing combustibility. Vim tias tsis muaj cov molten drips, cov pa luam yeeb tsawg heev, thiab cov tshuaj lom neeg tsawg, cov khoom siv tsis zoo ua ntej -coated panels muab sijhawm rau tib neeg kom khiav tawm ntau dua, tshwj xeeb tshaj yog nyob rau hauv qhov chaw kaw lossis muaj neeg coob coob.
Cov qauv kev ncaj ncees ntawm qhov kub thiab txias yog lwm qhov tsis muaj zog ntawm ACP. Lub melting point ntawm aluminium tsuas yog nyob ib ncig ntawm 660℃(1220℃F), uas yog qhov kub thiab txias uas tuaj yeem ncav cuag qhov hluav taws kub ib txwm. Thaum cov txheej txheem txhuas yaj thiab sib cais, cov txheej txheem polyethylene hlawv ncaj qha, yog li ua rau kev puas tsuaj ntawm lub vaj huam sib luag. Tsis tas li ntawd, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias txhuas muaj peev xwm nthuav dav thaum rhuab sib txawv ntawm cov yas thiab yog li ua rau distortion ntawm lub vaj huam sib luag thiab tearing ntawm seams. Yog li ntawd, cov nplaim taws tuaj yeem ua rau sab hauv ntawm lub vaj huam sib luag. Nyob rau hauv sib piv rau txhuas thiab yas, inorganic panels ua hauj lwm nyob rau hauv lub kub kub nyob rau hauv ib tug txawv txoj kev. Thaum lub gypsum qhuav tawm, cov fibers txhawb lub vaj huam sib luag thiab tiv thaiv nws los ntawm kev tawg. Vim lub fact tias thermal expansion yog tsawg heev ntawm no, cov seams nyob twj ywm nruj, tiv thaiv kev hla ntawm cov nplaim taws thiab cov roj kub kub ntawm lub vaj huam sib luag rau hauv lub tsev. Txawm tias nyob rau hauv cov ntaub ntawv ntawm ntev raug nplaim taws, lub vaj huam sib luag inorganic tseem nyob zoo thiab muaj txiaj ntsig hauv kev tiv thaiv hluav taws.
Cov txheej txheem kev nyab xeeb hluav taws thoob ntiaj teb txhais cov lus hais txog qhov sib txawv. Raws li EN 13501-1 tus qauv, Chav Kawm A1 txhais tau tias yog cov khoom tsis muaj hluav taws xob tag nrho. Vim yog lub hauv paus yas ntawm ACPs, lawv emissions ntau dhau ntawm tshav kub thaum hlawv, yog li ntawd, tsis tsim nyog yuav tsum tau muab cais raws li tsis yog -combustible. Feem ntau, lawv tsuas yog ncav cuag Chav B lossis C, uas ua tsis tau raws li qhov yuav tsum tau ua rau sab nrauv cladding nyob rau siab -nce thiab pej xeem cov tsev. Lub teb chaws xws li UK, Australia, New Zealand, thiab ntau lub tebchaws Middle East tau txwv tshwj xeeb rau cov kab hlau rhuav phab ntsa nrog cov combustible cores hauv lawv cov cai hauv tsev, yuam kom hloov cov nyiaj ntau ntawm ACP cladding uas twb muaj lawm. Inorganic pre-coated panels, los ntawm qhov sib txawv, yog nyob rau hauv chav kawm A1. Tsis muaj cov khoom siv hluav taws xob cuam tshuam rau lub sijhawm pom zoo, kev tshuaj ntsuam xyuas kev pov hwm, lossis kev tshuaj xyuas zaum kawg, uas tshem tawm cov kev pheej hmoo ua raws li cov neeg yuav khoom hla hla ciam teb.
Lub durability ntawm hluav taws tsis kam yog lwm qhov tseem ceeb. Qhov hluav taws kub tsis kam ntawm ACP muaj ntau yam ua rau hluav taws kub chemical-retardants. Thaum lub sij hawm, tshav kub thiab tshav ntuj ua rau degradation ntawm cov tshuaj no, thiab, yog li ntawd, hluav taws kub kuj yuav pib poob ib xyoos ib zaug. Qhov tsis yog -combustibility ntawm inorganic pre-coated panels yog vim nws gypsum thiab minerals. Lawv cov hluav taws kub-cov khoom tiv taus tsis ploj mus nrog lub sijhawm, yog li lawv kav ntev npaum li lub tsev.
Kev nyab xeeb hluav taws tsis yog ib qho ntxiv - ntawm - nws yog ib qho tseem ceeb rau cov khoom siv phab ntsa cladding. Lub vaj huam sib luag tsuas yog hu ua hluav taws kub tiag tiag yog tias nws tsis muaj dab tsi uas tuaj yeem tawg tau thiab, thaum raug hluav taws kub, tsis yaj, ntws, tso pa taws, lossis tawg. Los ntawm kev siv tag nrho cov qauv inorganic thiab lub tshav kub- absorbing mechanism raws li dej crystallization, inorganic pre-coated boards tshem tawm cov combustible core thiab tshuaj nplaim taws retardants uas tsoos txhuas puas vaj huam sib luag nyob ntawm seb. Qhov ntawd muab cov theem tseem ceeb ntawm kev nyab xeeb uas aluminium composite panels tsuas tsis tuaj yeem sib xws.