Izinga elisha le-steel rebar selifikile futhi lizoqala ukusebenza ngokusemthethweni ekupheleni kukaSepthemba

Inguqulo entsha yezinga likazwelonke le-steel rebar GB 1499.2-2024 "insimbi yokhonkolo oqinisiwe ingxenye 2: imigoqo yensimbi egoqwe ngezimbambo ezishisayo" izosetshenziswa ngokusemthethweni ngoSepthemba 25, 2024.

Esikhathini esifushane, ukuqaliswa kwezinga elisha kunomthelela omncane ezindlekweni zerebarukukhiqizwa nokuhweba, kodwa ngokuhamba kwesikhathi kukhombisa umbono jikelele oqondisayo wokuphela kwenqubomgomo ukwenza ngcono ikhwalithi yemikhiqizo yasekhaya kanye nokukhuthaza amabhizinisi ensimbi afike esiphethweni esimaphakathi nesiphezulu sochungechunge lwezimboni.
I. Izinguquko ezinkulu ezingeni elisha: ukuthuthukiswa kwekhwalithi kanye nokuqanjwa kabusha kwenqubo
Ukuqaliswa kwezinga le-GB 1499.2-2024 kulethe izinguquko ezimbalwa ezibalulekile, eziklanyelwe ukuthuthukisa ikhwalithi yemikhiqizo ye-rebar futhi ilethe izindinganiso ze-rebar zaseChina zihambisane namazinga omhlaba. Okulandelayo yizinguquko ezine ezibalulekile:

1. Izinga elisha liqinisa kakhulu imikhawulo yokubekezelela isisindo ye-rebar. Ngokuqondile, ukuchezuka okuvumelekile kwe-rebar yobubanzi obungu-6-12 mm kungu-±5.5%, 14-20 mm kungu-+4.5%, kanti u-22-50 mm ngu-+3.5%. Lolu shintsho luzothinta ngokuqondile ukunemba kokukhiqiza kwe-rebar, edinga abakhiqizi ukuthi bathuthukise izinga lezinqubo zokukhiqiza namandla okulawula ikhwalithi.
2. Amabanga aphezulu e-rebar anjengeI-HRB500E, I-HRBF600Ekanye ne-HRB600, izinga elisha ligunyaza ukusetshenziswa kwenqubo yokucwenga i-ladle. Lesi sidingo sizothuthukisa kakhulu ikhwalithi nokuzinza kokusebenza kwalokhu kunamandla aphezuluimigoqo yensimbi, futhi ngokuqhubekayo ukhuthaze imboni ekuqondeni ukuthuthukiswa kwensimbi enamandla kakhulu.
3. Ezimweni ezithile zohlelo lokusebenza, izinga elisha lethula izidingo zokusebenza zokukhathala. Lolu shintsho luzothuthukisa impilo yesevisi nokuphepha kwe-rebar ngaphansi kwemithwalo enamandla, ikakhulukazi kumabhuloho, izakhiwo eziphakeme kanye namanye amaphrojekthi anezidingo eziphezulu zokusebenza kokukhathala.
4. Izinga elijwayelekile libuyekeza izindlela zesampula nezinqubo zokuhlola, okuhlanganisa nokwengezwa kokuhlolwa kokuhlehla kwebha yebanga elithi "E". Lezi zinguquko zizothuthukisa ukunemba nokuthembeka kokuhlolwa kwekhwalithi, kodwa zingase futhi zinyuse izindleko zokuhlola kubakhiqizi.
Okwesibili, umthelela ezindlekweni zokukhiqiza
Ukuqaliswa kwezinga elisha kuzovumela inhloko yamabhizinisi okukhiqiza intambo ukuthuthukisa ikhwalithi yomkhiqizo, ukwandisa ukuncintisana kwemakethe, kodwa futhi ilethe izindleko zokukhiqiza ezisencane: ngokusho kocwaningo, inhloko yamabhizinisi okukhiqiza insimbi ngokuhambisana nezinga elisha. izindleko zokukhiqiza umkhiqizo zizokwenyuka cishe ngama-yuan angama-20 ngethani.
Okwesithathu, umthelela wemakethe

Izinga elisha lizokhuthaza ukuthuthukiswa kanye nokusetshenziswa kwemikhiqizo yensimbi enamandla aphezulu. Isibonelo, amabha ensimbi angu-650 MPa aphezulu-amandla aphezulu angase athole ukunakwa okwengeziwe. Lokhu kushintsha kuzoholela ekushintsheni ekuxubeni komkhiqizo kanye nesidingo semakethe, okungase kuthande lezo zigayo zensimbi ezingakhiqiza izinto ezithuthukisiwe.
Njengoba amazinga ephakanyiswa, isidingo semakethe sekhwalithi ephezulu sizokhuphuka. Izinto ezisetshenziswayo ezihlangabezana namazinga amasha zingase zibize iprimiyamu yentengo, ezogqugquzela izinkampani ukuthi zithuthukise ikhwalithi yomkhiqizo.