Sezvo maguta pasi rose achimhanya kusimudzira zvivakwa zvekare uye kuvaka zvivakwa zvitsva zvemaguta,mirwi yesimbiZvakabuda semhinduro inochinja-chinja zvinhu—nekukurumidza kwavo kuisa kwava chinhu chikuru chinotungamira pakushandiswa, zvichibatsira makondirakiti kuderedza nguva yemapurojekiti pakati pehurongwa hwakaoma hwekuvaka mumaguta.
Ruzivo rweindasitiri kubva kuGlobal Steel Construction Association (GSCA) runoratidza kuwedzera kwe22% gore negore muhuwandu hwemurwi wepepakushandiswa kwemapurojekiti emaguta muna 2024, kusanganisira kuwedzera kwepasi pevhu, kuvandudza patsva kwemahombekombe, uye basa rekuchera kwakadzika kwenheyo refu. Kusiyana nezvivakwa zvechinyakare zvekuchengetedza kongiri zvinoda mavhiki enguva yekupisa,mirwi yesimbi yemazuva ano—inowanzogadzirwa kuti ienderane nehukuru hwepurojekiti—inogona kurovererwa muvhu nechiyero chemamita gumi nemashanu kusvika makumi maviri pazuva, zvichideredza nguva yekuvaka panzvimbo yacho ne30% paavhareji.
"Kuvaka kwemaguta hakumiri—kunonoka kunoreva mitengo yakakwira uye kukanganiswa kwakawanda kuvagari," akadaro Maria Hernandez, mainjiniya mukuru wezvivakwa pakambani yekuvaka iri muMadrid yeEuroBuild. "Pachirongwa chedu chekuwedzera metro munguva pfupi yapfuura muBarcelona, tichichinja kuenda ku-interlockingmirwi yesimbi yakamonerwa inopisamadziro ekudzivirira gomba akachekwa mazuva gumi nemaviri kubva pakuchera. Izvozvo zvakakosha kana uchishanda munzvimbo dzine vanhu vakawanda dzisina vanhu vakawanda vanopinda.
Kukwezva kwamirwi yepepa reUZvinopfuura kumhanya. Mapendi avo anodzivirira ngura (akadai sekupisa-dip galvanization kana polymer treatments) anoita kuti agare kwenguva refu kushandiswa kwezvivakwa, nepo dhizaini yavo yemodular ichibvumira kubviswa nyore nyore uye kushandiswazve mumapurojekiti emangwana—zvichienderana nezvinangwa zvekuchengetedza maguta pasi rose. Semuenzaniso, mukuvandudza kwegungwa reMarina Bay muSingapore, mapuranga esheet akaiswa muna 2023 kuti agadzirise ivhu rakadzorerwa achashandiswazve seprojekiti yekudzivirira mahombekombe iri pedyo muna 2025, zvichideredza marara ezvinhu ne40%.
Varongi vemaguta vari kuonawo mabhenefiti emota uye nzira dzeveruzhinji. MuToronto, chirongwa chekuwedzera migwagwa kota yapfuura chakashandisa mirwi yemachira kuvaka madziro ekuchengetedza kwenguva pfupi munzvimbo yebasa. "Nekuti kuiswa kwacho kwakapedzwa muhusiku hutatu chete, takadzivirira kuvharwa kwemigwagwa yese panguva dzekushanda kwakanyanya - chimwe chinhu chingadai chisina kugoneka nemadziro ekongiri," akadaro mutauriri weToronto Transportation Department James Liu.
Vagadziri vari kupindura kudiwa kuri kukura nekuvandudza zvimwe zvinhu zvitsva. Pakutanga kwemwedzi uno, mugadziri wesimbi wekuDutch ArcelorMittal akatanga mhando itsva yesimbi yakareruka inogara yakasimba asi iri nyore kutakura nekuisa ne15%, ichinanga mapurojekiti epakati pemaguta uko michina inorema iri mishoma.
Nyanzvi dzemaindasitiri dzinofanotaura kuti maitiro aya achakurumidza muna 2025, nekushandiswa kwemasheet murwi kunotarisirwa kukura neimwe 18% sezvo maguta muAsia neAfrica achiwedzera mari yekudyara muzvivakwa. "Kukura kwemaguta hakusi kudzikira, uye makontrakita anoda mhinduro dzinoenzanisa kumhanya, kuchengetedzeka, uye kugara kwenguva refu," akadaro muongorori wezvivakwa weGSCA, Raj Patel. "Masheet murwi anoongorora mabhokisi ese iwayo—uye basa ravo mukuvaka maguta zvinobudirira richangokura."
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Nguva yekutumira: Gunyana-03-2025