Pakumanga kwamakono, rebar ndiye maziko enieni, amatenga gawo lofunikira pa chilichonse kuyambira ma skyscrapers ataliitali mpaka misewu yokhotakhota. Mawonekedwe ake apadera akuthupi amapanga gawo lofunikira pakuwonetsetsa chitetezo chanyumba komanso kukhazikika.
Rebar, dzina lodziwika bwino lazitsulo zazitsulo zotentha, limachokera ku nthiti. Chigawo chake chimakhala chozungulira, chokhala ndi nthiti ziwiri zotalikirana komanso nthiti zopingasa motalikana m'litali mwake. Nthiti zopingasazo zimakhala zooneka ngati kanyenyezi ndipo sizimadutsana ndi nthiti zautali. Kapangidwe kapadera kameneka sikumangolimbitsa mgwirizano pakati pa rebar ndi konkriti komanso kumawonjezera mphamvu yake yokhazikika komanso kukhazikika kwathunthu pazomangamanga. Rebar nthawi zambiri imapangidwa kuchokera ku chitsulo chopangidwa ndi mpweya kapena chitsulo chochepa cha alloy ndipo imabwera mosiyanasiyana, kuchokera pa 6 mm mpaka 50 mm, kuti igwirizane ndi zofunikira zosiyanasiyana zomanga.
Rebar ili ndi zida zapamwamba zamakina, imagwiritsa ntchito mphamvu zamakina achitsulo panthawi yamavuto, ndikupangitsa kuti ikhale yopambana kuposa rebar wamba. Pamwamba pake amapangidwa kuti apange wosanjikiza wa oxide wosanjikiza, womwe umapereka kukana kwa dzimbiri ndikuwonjezera moyo wake wautumiki. Ikhozanso kudulidwa mosavuta ku utali wofunidwa kupyolera mu makina, kupititsa patsogolo ntchito zomanga.
Rebar amagawidwa m'njira zosiyanasiyana. Malinga ndi muyezo waku China (GB1499), rebar imagawika m'makalasi atatu kutengera mphamvu (zokolola zochulukirapo / kulimba kwamphamvu): HRB335, yokhala ndi mphamvu ya 335 MPa, yoyenera pazomanga zonse; HRB400, yokhala ndi mphamvu ya 400 MPa, yoyenera nyumba zonyamula katundu wambiri; ndi HRB500, yokhala ndi mphamvu ya 500 MPa, yopereka mphamvu zolimba kwambiri komanso zolimbitsa thupi, zoyenera kuchita ntchito zaukadaulo zapadera. Rebar ikhoza kugawidwa m'makalasi otentha komanso ozizira kutengera njira yake yopanga. Rebar yotenthedwa yotentha imapangidwa kuchokera kuzitsulo zoponyedwa mosalekeza kapena zopindidwa poyamba, zomwe zimapereka zabwino monga kulimba kwambiri, kukhazikika bwino, komanso kumamatira konkriti. Mbali inayi, rebar yoziziritsa yozizira imapangidwa kuchokera ku zokometsera zotentha, zoziziritsa kuti zichotse sikelo, kenako zoziziritsa. Imawonetsanso mphamvu zapamwamba, ductility wabwino, ndi mphamvu zomangira zolimba ndi konkriti. Pogwiritsa ntchito, imatha kugawidwa kukhala rebar wamba ya konkire yolimbikitsidwa ndi rebar yotenthetsera kutentha kwa konkire yokhazikika.
Rebar imagwiritsidwa ntchito m'magawo osiyanasiyana omanga ndi mainjiniya. Pomanga nyumba, nthawi zambiri amagwiritsidwa ntchito kulimbikitsa ndi kulumikiza matabwa, mizati, slabs, ndi zigawo zina muzitsulo zolimba za konkriti, kupititsa patsogolo kukhazikika kwawo ndi kunyamula katundu. Mu engineering ya boma, imagwira ntchito ngati kulimbikitsa ndi kulumikiza zinthu mu milatho, tunnel, ndi misewu yayikulu, kuwongolera kukhazikika kwawo komanso kukana zivomezi. Muukadaulo wa njanji, imagwiritsidwa ntchito poteteza ndi kulumikiza njanji, kuonetsetsa kuti ikuyenda bwino. M'migodi, nthawi zambiri amagwiritsidwa ntchito ngati kulimbikitsa ndi kuthandizira, kuthandizira madenga a migodi ndi makoma. Amagwiritsidwanso ntchito pokongoletsa mamangidwe kupanga zinthu zokongoletsera monga njanji, njanji, ndi masitepe, kuphatikiza kukongola ndi kulimba.
Kupanga kwa rebar kumafuna kuwonetsetsa kupitiliza pakati pa njira iliyonse. Njirayi imagawidwa kukhala chitsulo, kupanga zitsulo, ndi kumaliza. Ukadaulo wofunikira wopangira amaphatikiza chithandizo cha kutentha kwapambuyo-kugudubuza, kupanga zitsulo zabwino, kudula ndi kugudubuza, ndikugudubuza kopanda dzenje.
Rebar ilinso ndi udindo waukulu pamsika. Zimakhala ngati chizindikiro chachikulu cha chitukuko cha zomangamanga, ndipo kusinthasintha kwake kwamitengo kumakhudza kwambiri makampani okwera ndi otsika muzitsulo zazitsulo. Kwa opanga zitsulo, kukwera mitengo kwa rebar kumatanthawuza kuti phindu lalikulu; kwa makampani omanga m'munsi ndi omanga nyumba, kusinthasintha kwamitengo kumakhudza kwambiri ndalama zomanga. Mu 2023, mitengo ya rebar yakudziko langa idasintha pakati pa 3,600 ndi 4,500 yuan/ton, kukwera kwambiri mkati mwa Marichi. Kuyambira kumapeto kwa Marichi mpaka kumapeto kwa Meyi, deta yogulitsa nyumba idasowa poyembekeza msika. Kuphatikizika ndi kutsika kwamitengo ya malasha m'nyumba kutsatizana ndi kuchepekera kwavuto la mphamvu zamayiko akunja, mitengo yobweza ngongole idatsika kwambiri. Mu Novembala, ndondomeko zingapo, kuphatikiza zomwe zimagwirizana ndi ma triliyoni-yuan boma bond ndi malo ogulitsa nyumba, zidakulitsa chidwi cha msika ndikupangitsa kuti mitengo ibwerenso. Pakalipano, nyengo yabwino kumsika wakumwera kwadzetsa ntchito yofulumira, koma kufunikira kwakukulu kumakhalabe kolimba. Mu Disembala, motsogozedwa ndi kukwera kwamitengo yamafuta ndi mfundo zazachuma, mitengo ya rebar idasinthasintha pafupifupi 4,100 yuan/tani, kufikira 4,090.3 yuan/ton pa Disembala 29.
Rebar, maziko olimba a ntchito yomanga, imawala m'magawo osiyanasiyana chifukwa cha mawonekedwe ake apadera, omwe amathandizira kukula kwa ntchito yomanga. Idzapitilirabe kusinthika ndi kupita patsogolo kwaukadaulo komanso chitukuko chamakampani.
Nthawi yotumiza: Aug-18-2025