Wax soo saar

35-kii sano ee la soo dhaafay, warshadaha birta iyo birta ayaa arkay isbeddelo muhiim ah. Sanadkii 1980 716 Mln Tonn ayaa la soo saaray oo waddamada soo socdaa waxay ka mid ahaayeen hoggaamiyeyaasha: USSR (21% ee wax soo saarka birta adduunka), USA (14%), Jarmalka (6%), Shiinaha (5%) ), Talyaaniga (4%), Faransiiska iyo Poland (3%), Canada iyo Brazil (2%). Sida laga soo xigtay Ururka World Steel (WSA), ee 2014 Safarka Dunida Birta Adduunka wuxuu ahaa 1665 Mln Tonnes - 1% kor u kaca marka la barbar dhigo 2013. Liiska wadamada hogaaminta ayaa si weyn is beddelay. Shiinaha ayaa ugu horreeya oo ka hormaraya dalal kale (60% waxsoosaarka birta adduunka), saamiga dalalka kale ee laga soo qaado Top-10 waa 2-8% - Mareykanka iyo India (6%), koonfurta Kuuriya iyo Ruushka (5%), Jarmalka (3%), Turkey, Brazil iyo Taiwan (2%) (eeg Jaantuska 2). Ka sokow Shiinaha, wadamada kale ee xoojisay booskooda 10-ka sare waa Hindiya, South Korea, South Korea, Brazil iyo Turkey.

Isticmaal

Birta ku jirta dhammaan foomamka (bir bir ah, bir bir ah iyo bir bir ah) ayaa ah waxyaabaha ugu badan ee lagu isticmaalo dhaqaalaha casriga ah ee dhaqaalaha adduunka ee casriga ah. Waxay haysaa meesha ugu sareysa dhismaha ee ka hor qoryaha, oo ku tartamaya sibidhka oo ay la macaamilaan iyada (ferroconcrete), oo wali la tartama noocyada cusub ee agabyada dhismaha (Polimers). Sanado badan, warshadaha injineerinka ayaa isticmaalaya waxyaabo kacsan oo ka badan warshadaha kale ee kale. Isticmaalka birta ee adduunka waxaa lagu gartaa isbeddel kor u dhaaf ah. Celcelis ahaan heerka kobaca kobaca kobaca ee 2014 wuxuu ahaa 3%. Heerka koritaanka hoose ayaa lagu arki karaa dalal horumaray (2%). Wadamada soo koraya waxay leeyihiin heerar sare oo ah isticmaalka birta (1,133 mln).