Mu bwubatsi bugezweho, rebar ni inkingi ikomeye, igira uruhare runini muri byose kuva ku nyubako ndende kugeza ku nzira zizunguruka. Imiterere yayo yihariye ituma iba ingenzi mu kurinda umutekano no kuramba kw'inyubako.
Rebar, izina risanzwe ry'ibyuma bizingirwa n'imigozi bishyushye, rikomoka ku buso bw'imigozi. Igice cyayo gisanzwe kiba kizengurutse, gifite imbavu ebyiri ndende n'imbavu zizunguruka zifite uburebure bungana. Imbavu zizunguruka zifite ishusho nk'iya kare kandi ntizihurira n'imbavu ndende. Ubu buryo bwihariye bwo hejuru ntibukomeza gusa isano iri hagati ya rebar na sima ahubwo bunatuma imbaraga zayo zo gukurura no kudahungabana muri rusange mu nyubako. Rebar isanzwe ikorwa mu byuma by'ubwubatsi bya karuboni cyangwa ibyuma by'ubwubatsi bike kandi iza mu bwoko butandukanye bwa diametre, kuva kuri mm 6 kugeza kuri mm 50, kugira ngo ihuze n'ibikenewe mu nyubako zitandukanye.
Rebar ifite ubushobozi bwo gukora ibintu mu buryo bwiza, ikoresha neza ubushobozi bwo gukora ibintu mu buryo bw'icyuma mu gihe cyo gushyuha, bigatuma irusha rebar isanzwe gukora ibintu mu buryo busanzwe. Ubuso bwayo butunganywa kugira ngo bukore urwego rw'ubushyuhe bwinshi, butuma idatwarwa n'ingese kandi bukongera igihe cyo gukora. Ishobora kandi gukatwa byoroshye ku burebure bukenewe binyuze mu gukora imashini, bityo ikorohereza imirimo yo kubaka.
Rebar ishyirwa mu byiciro bitandukanye. Dukurikije ibipimo by'Abashinwa (GB1499), rebar igabanyijemo ibice bitatu bishingiye ku mbaraga (aho ikura/imbaraga zo gukurura): HRB335, ifite imbaraga za 335 MPa, ikwiriye inyubako rusange; HRB400, ifite imbaraga za 400 MPa, ikwiriye inyubako zitwara imizigo myinshi; na HRB500, ifite imbaraga za 500 MPa, itanga imbaraga nyinshi zo gukurura no gukurura, ikwiriye imishinga yihariye y'ubuhanga. Rebar ishobora kugabanywamo ibyiciro bishyushye n'ibikonje bitewe n'uburyo ikorwa. Rebar ishyushye ikorwa mu mpapuro z'icyuma zikozwe mu buryo buhoraho cyangwa zizungurutswe mbere, zitanga ibyiza nko gukomera cyane, ubushobozi bwo gukurura, no gufata neza beto. Rebar ishyushye ikorwa mu byuma bishyushye, bigakurwamo ibinini, hanyuma bigakonjeshwa. Igaragaza kandi imbaraga nyinshi, ubushobozi bwo gukurura, n'imbaraga zikomeye zo gufatana na beto. Ukurikije ikoreshwa ryayo, ishobora kugabanywamo imigozi isanzwe ya sima ikomeye n'imigozi ishyushye ya sima ishyizwemo imbaraga.
Rebar ikoreshwa mu bwubatsi n'ubuhanga butandukanye. Mu nyubako z'ubwubatsi, ikoreshwa cyane mu gushimangira no guhuza imirimbo, inkingi, ibyuma, n'ibindi bice mu nyubako za sima zikomeye, bikongera ubushobozi bwazo bwo kwihanganira imitwaro. Mu buhanga bw'ubwubatsi, ikora nk'ibikoresho byo gukomeza no guhuza ibiraro, imihanda, n'imihanda minini, binongera ubushobozi bwabyo bwo kudahungabana no kurwanya imitingito. Mu buhanga bw'imihanda ya gari ya moshi, ikoreshwa mu gufata neza no guhuza imiringoti, bigatuma ikora neza. Mu bucukuzi bw'amabuye y'agaciro, ikoreshwa cyane nk'ibikoresho byo gukomeza no gushyigikira, bishyigikira ibisenge by'ibirombe n'inkuta. Ndetse ikoreshwa no mu mitako y'ubwubatsi kugira ngo ikore ibintu byo gushushanya nk'imiringoti, inkingi, n'ingazi, bihuza ubwiza n'uburambe.
Gukora rebar bisaba ko buri gikorwa kigenda neza. Ubusanzwe igikorwa kigabanyijemo gukora ibyuma, gukora ibyuma by'ingenzi, no kurangiza. Ikoranabuhanga ry'ingenzi mu gukora ririmo gutunganya ubushyuhe nyuma yo kuzunguruka, gukora ibyuma bito, gukata no guzunguruka, no kuzunguruka nta mwobo.
Rebar ifite umwanya ukomeye ku isoko. Ikora nk'ikimenyetso cy'ingenzi cy'iterambere ry'inganda z'ubwubatsi, kandi ihindagurika ry'ibiciro byayo rigira ingaruka zitaziguye ku bigo byo mu nganda z'ibyuma bizamuka n'ibimanuka mu nganda z'ibyuma. Ku bakora ibyuma, izamuka ry'ibiciro bya rebar rituma inyungu yiyongera; ku bigo by'ubwubatsi bimanuka n'abateza imbere imitungo itimukanwa, ihindagurika ry'ibiciro rigira ingaruka zitaziguye ku biciro by'ubwubatsi. Mu 2023, ibiciro bya rebar byo mu gihugu cyanjye byahindutse hagati ya yuan 3,600 na 4,500 kuri toni, bizamuka hagati muri Werurwe. Kuva mu mpera za Werurwe kugeza mu mpera za Gicurasi, amakuru yerekeye imitungo itimukanwa ntiyageze ku byari byitezwe ku isoko. Hamwe no kugabanuka rusange kw'ibiciro by'amakara yo mu gihugu nyuma yo kugabanuka kw'ikibazo cy'ingufu mu mahanga, ibiciro bya rebar byagabanutse cyane. Mu Gushyingo, politiki zitandukanye, harimo n'izijyanye n'impapuro mpapuro mpapuro mpapuro mpapuro mpapuro mpapuro nyemezabuguzi za leta za triliyoni za yuan n'imitungo itimukanwa, byongereye cyane imyumvire ku isoko ndetse bituma ibiciro bya rebar bizamuka. Hagati aho, ikirere cyiza ku isoko ryo mu majyepfo cyatumye habaho akazi kenshi, ariko muri rusange icyifuzo kiracyari gikomeye. Mu Ukuboza, bitewe n’izamuka ry’ibiciro by’ibikoresho fatizo na politiki y’ubukungu rusange, ibiciro bya rebar byahindutse bigera kuri yuan 4.100 kuri toni, bigera kuri yuan 4.090.3 kuri toni ku ya 29 Ukuboza.
Rebar, ishingiro rikomeye ry'imishinga y'ubwubatsi, irabagirana mu nzego zitandukanye bitewe n'imiterere yayo yihariye, igira ingaruka ku iterambere ry'inganda z'ubwubatsi. Izakomeza gutera imbere bitewe n'iterambere ry'ikoranabuhanga n'iterambere ry'inganda.
Igihe cyo kohereza: Kanama-18-2025