Umgangatho omtsha we-steel rebar ufikile kwaye uya kuphunyezwa ngokusemthethweni ekupheleni kukaSeptemba

Inguqulelo entsha yomgangatho wesizwe we-steel rebar GB 1499.2-2024 "intsimbi yekonkrithi eyomeleziweyo inxalenye yesi-2: imivalo yentsimbi eshushu eqengqelekayo" iya kuphunyezwa ngokusemthethweni ngoSeptemba 25, 2024.

Ngexesha elifutshane, ukuphunyezwa komgangatho omtsha kunempembelelo encinci kwiindlekorebarimveliso kunye nokurhweba, kodwa kwixesha elide libonisa ingcamango epheleleyo ekhokelayo yomgaqo-nkqubo wokuphela kokuphucula umgangatho weemveliso zasekhaya kunye nokukhuthaza amashishini entsimbi ukuya phakathi kunye nesiphelo esiphezulu somxokelelwane wezoshishino.
I. Utshintsho olukhulu kumgangatho omtsha: ukuphuculwa komgangatho kunye nokuqaliswa kwenkqubo
Ukuphunyezwa komgangatho we-GB 1499.2-2024 kwazisa inani leenguqu ezibalulekileyo, ezilungiselelwe ukuphucula umgangatho weemveliso ze-rebar kunye nokuzisa imigangatho ye-rebar yaseChina ngokuhambelana nemigangatho yamazwe ngamazwe. Ezi zilandelayo ziinguqu ezine eziphambili:

1. Umgangatho omtsha uqinisa kakhulu imida yokunyamezela ubunzima kwi-rebar. Ngokukodwa, ukutenxa okuvumelekileyo kwi-6-12 mm ububanzi be-rebar yi-± 5.5%, i-14-20 mm yi-4.5%, kunye ne-22-50 mm yi-+3.5%. Olu tshintsho luya kuchaphazela ngokuthe ngqo ukuchaneka kwemveliso ye-rebar, efuna abavelisi ukuba baphucule umgangatho weenkqubo zokuvelisa kunye nokukwazi ukulawula umgangatho.
2. Kuba amabanga aphezulu-amandla rebar ezifanaHRB500E, I-HRBF600Ekunye ne-HRB600, umgangatho omtsha ugunyazisa ukusetyenziswa kwenkqubo yokucoca ileyiti. Le mfuno iya kuphucula kakhulu umgangatho kunye nokuzinza kokusebenza kwezi zinto ziphezuluimivalo yentsimbi, kunye nokukhuthaza ngakumbi ishishini ukuya kwicala lophuhliso lwensimbi ephezulu.
3. Kwiimeko ezithile zokusetyenziswa, umgangatho omtsha wazisa iimfuno zokusebenza kokukhathala. Olu tshintsho luya kuphucula ubomi benkonzo kunye nokhuseleko lwe-rebar phantsi kwemithwalo enamandla, ngakumbi kwiibhulorho, izakhiwo eziphakamileyo kunye nezinye iiprojekthi ezineemfuno eziphezulu zokusebenza kokukhathala.
4. Umgangatho wohlaziyo weendlela zesampulu kunye neenkqubo zovavanyo, kubandakanywa ukongezwa kovavanyo lokugoba umva "E" grade rebar. Olu tshintsho luya kuphucula ukuchaneka kunye nokuthembeka kovavanyo lomgangatho, kodwa lunokunyusa iindleko zokuvavanya abavelisi.
Okwesibini, impembelelo kwiindleko zemveliso
Ukuphunyezwa komgangatho omtsha kuya kuba luncedo kwintloko yamashishini okuvelisa intambo ukuze kuphuculwe umgangatho wemveliso, ukwandisa ukukhuphisana kwemarike, kodwa kuzisa iindleko zemveliso ephantsi: ngokutsho kophando, intloko yamashishini emveliso yentsimbi ngokuhambelana nomgangatho omtsha. iindleko zokuvelisa imveliso ziya kunyuka malunga ne-20 yuan / ton.
Okwesithathu, impembelelo yemarike

Umgangatho omtsha uya kukhuthaza uphuhliso kunye nokusetyenziswa kweemveliso zetsimbi zamandla aphezulu. Ngokomzekelo, i-650 MPa i-ultra-high-strength-high-strength seismic steel bar ingafumana ingqalelo engakumbi. Olu tshintsho luya kukhokelela kutshintsho kumxube wemveliso kunye nemfuno yemarike, enokuthi ithande ezo zixhobo zentsimbi ezinokuvelisa izinto eziphuculweyo.
Njengoko imigangatho iphakanyiswa, imfuno yemarike yomgangatho ophezulu we-rebar iya kunyuka. Izixhobo ezihlangabezana nemigangatho emitsha zinokuyalela iprimiyamu yexabiso, nto leyo eya kukhuthaza iinkampani ukuba ziphucule umgangatho wemveliso.