ETT Subway/ tunnel fiber cement saxan bir ah

Sharaxaad Gaaban:

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