ETT Subway/ tunnel fiber cement saxan bir ah

Sharaxaad Gaaban:

Saxanka birta kalsiyum waa mid ka mid ah taxanaha calcium birta, by cufnaanta sare calcium silicate guddiga dusha habka kiimikada, ama dhaldhalaalka inorganic waxay noqon doontaa cimilada sare fluorocarbon aluminium zinc saxan bir iyo isku darka organic ay, kabid heerkulka sare iyo cadaadiska, daaweynta cadaadiska taagan habka, iyo dhabarka oo leh lakabka xiran, qoyaanka, xoojinta doorka dharka aluminium ee daboolan.Birta kalsiyum qaab-dhismeedka gaarka ah, helay tiro ka mid ah shatiyada qaranka, waa nooc ka mid ah ilaalinta deegaanka, tamarta badbaadinta wax cusub, waxaa si weyn loo isticmaalaa in tunnel, tareenka dhulka hoostiisa, garoonka diyaaradaha iyo gaadiidka dhulka hoostiisa kale ilaalinta dabka iyo ilaalinta qaranka.