Mu zomangamanga zamakono, rebar ndi chinthu chofunikira kwambiri, chomwe chimagwira ntchito yofunika kwambiri pa chilichonse kuyambira nyumba zazitali mpaka misewu yozungulira. Kapangidwe kake kapadera kamapangitsa kuti ikhale gawo lofunikira pakutsimikizira chitetezo cha nyumba komanso kulimba.
Rebar, dzina lodziwika bwino la zitsulo zopindika ndi ribbed ribbed, limachokera ku pamwamba pa ribbed. Gawo lake nthawi zambiri limakhala lozungulira, ndi nthiti ziwiri zazitali komanso nthiti zopingasa zofanana kutalika kwake. Nthiti zopingasa zimakhala ngati crescent ndipo sizimalumikizana ndi nthiti zazitali. Kapangidwe kapadera ka pamwamba kameneka sikuti kamangolimbitsa mgwirizano pakati pa rebar ndi konkire komanso kumawonjezera kwambiri mphamvu yake yokoka komanso kukhazikika kwa nyumba. Rebar nthawi zambiri imapangidwa ndi chitsulo chopangidwa ndi kaboni kapena chitsulo chopangidwa ndi chitsulo chochepa ndipo imabwera m'madigiri osiyanasiyana, kuyambira 6 mm mpaka 50 mm, kuti igwirizane ndi zofunikira zosiyanasiyana za nyumba.
Rebar ili ndi mphamvu zabwino kwambiri zamakina, imagwiritsa ntchito bwino mphamvu zamakina zachitsulocho panthawi ya kupsinjika, zomwe zimapangitsa kuti ikhale yabwino kuposa rebar wamba. Pamwamba pake pamakhala chitsulo chokhuthala cha oxide, chomwe chimapereka kukana dzimbiri ndikuwonjezera nthawi yake yogwirira ntchito. Itha kudulidwa mosavuta mpaka kutalika komwe mukufuna kudzera mu makina opangira, zomwe zimapangitsa kuti ntchito yomanga ikhale yosavuta.
Rebar imagawidwa m'magulu osiyanasiyana. Malinga ndi muyezo waku China (GB1499), rebar imagawidwa m'magulu atatu kutengera mphamvu (gawo lotulutsa/mphamvu yokoka): HRB335, yokhala ndi mphamvu ya 335 MPa, yoyenera nyumba zonse; HRB400, yokhala ndi mphamvu ya 400 MPa, yoyenera nyumba zokhala ndi katundu wambiri; ndi HRB500, yokhala ndi mphamvu ya 500 MPa, yomwe imapereka mphamvu yokoka kwambiri komanso yokoka, yoyenera mapulojekiti apadera aukadaulo. Rebar imatha kugawidwa m'magulu okoka ndi okoka kutengera njira yake yopangira. Rebar yokoka ndi yokoka imapangidwa kuchokera ku mapepala achitsulo opangidwa mosalekeza kapena opindidwa poyamba, omwe amapereka zabwino monga mphamvu yayikulu, kupindika bwino, komanso kumamatira bwino ku konkire. Rebar yokoka ndi yokoka, kumbali ina, imapangidwa kuchokera ku ma coil okoka ndi okoka, otsukidwa kuti achotse sikelo, kenako okoka ndi okoka. Imasonyezanso mphamvu yayikulu, kupindika bwino, komanso mphamvu yolimba yolumikizana ndi konkire. Pogwiritsa ntchito, ikhoza kugawidwa m'magulu awiri: rebar wamba wa konkriti yolimbikitsidwa ndi rebar yotenthedwa ndi kutentha kwa konkriti yolimbikitsidwa kale.
Rebar imagwiritsidwa ntchito m'magawo osiyanasiyana omanga ndi uinjiniya. Mu zomangamanga, imagwiritsidwa ntchito kwambiri kulimbitsa ndi kulumikiza matabwa, zipilala, matabwa, ndi zinthu zina mu zomangamanga zolimbikitsidwa za konkriti, kukulitsa kukhazikika kwawo ndi mphamvu zonyamula katundu. Mu zomangamanga za zomangamanga, imagwiritsidwa ntchito ngati zinthu zolimbitsa ndi zolumikizira m'milatho, m'misewu, ndi m'misewu ikuluikulu, kukulitsa kukhazikika kwawo komanso kukana kwa zivomerezi. Mu uinjiniya wa njanji, imagwiritsidwa ntchito kulimbitsa ndi kulumikiza njanji, kuonetsetsa kuti zikugwira ntchito bwino. Mu migodi, nthawi zambiri imagwiritsidwa ntchito ngati zinthu zolimbitsa ndi zothandizira, kuchirikiza madenga ndi makoma a migodi. Imagwiritsidwanso ntchito pokongoletsa zomangamanga kupanga zinthu zokongoletsera monga zogwirira ntchito, njanji, ndi masitepe, kuphatikiza kukongola ndi kulimba.
Kupanga mipiringidzo yachitsulo kumafuna kuonetsetsa kuti ntchito iliyonse ikuyenda bwino. Njirayi nthawi zambiri imagawidwa m'magulu awiri: kupanga chitsulo, kupanga chitsulo chachikulu, ndi kumaliza. Njira zazikulu zopangira zimaphatikizapo kutentha pambuyo pogubuduza, kupanga chitsulo chosalala, kudula ndi kuzunguliza, ndi kuzunguliza kopanda mabowo.
Rebar ilinso ndi udindo waukulu pamsika. Imagwira ntchito ngati chizindikiro chachikulu cha chitukuko cha makampani omanga, ndipo kusinthasintha kwa mitengo yake kumakhudza mwachindunji makampani akumtunda ndi akumunsi mu unyolo wamakampani opanga zitsulo. Kwa opanga zitsulo, kukwera kwa mitengo ya rebar kumatanthauza phindu lalikulu; kwa makampani omanga omwe akumunsi ndi opanga nyumba, kusinthasintha kwa mitengo kumakhudza mwachindunji ndalama zomanga. Mu 2023, mitengo ya rebar ya dziko langa idasinthasintha pakati pa 3,600 ndi 4,500 yuan/tani, zomwe zidafika pachimake pakati pa Marichi. Kuyambira kumapeto kwa Marichi mpaka kumapeto kwa Meyi, deta ya malo sinali yokwanira zomwe msika unkayembekezera. Kuphatikiza ndi kutsika kwakukulu kwa mitengo ya malasha am'nyumba pambuyo pa kuchepa kwa vuto la mphamvu zakunja, mitengo ya rebar idatsika mofulumira. Mu Novembala, mfundo zingapo, kuphatikizapo zokhudzana ndi ma bond aboma a trillion-yuan ndi malo, zidakweza kwambiri malingaliro amsika ndikupangitsa kuti mitengo ya rebar ikwere. Pakadali pano, nyengo yabwino pamsika wakumwera yapangitsa kuti pakhale ntchito yofulumira, koma kufunikira konse kukupitilirabe. Mu Disembala, chifukwa cha kukwera kwa mitengo ya zinthu zopangira ndi mfundo zachuma, mitengo ya rebar inasinthasintha pafupifupi 4,100 yuan/tani, kufika pa 4,090.3 yuan/tani pa Disembala 29.
Rebar, maziko olimba a ntchito zomanga, imawala m'magawo osiyanasiyana chifukwa cha makhalidwe ake apadera, zomwe zimakhudza chitukuko cha makampani omanga. Idzapitilizabe kukula ndi kupita patsogolo kwa ukadaulo ndi chitukuko cha makampani.
Nthawi yotumizira: Ogasiti-18-2025