Rebar - kayan gini mai mahimmanci a cikin gini

I. Bayanan Diamita (Babban Tsarin Aikace-aikacen) Bayanan diamita na rebar HRB400E dole ne su bi ka'idojin "Sandunan Karfe Masu Zafi Don Siminti Mai Ƙarfafawa" (GB/T 1499.2-2018). Matsakaicin diamita shine 6mm-50mm, wanda ya shafi yawancin yanayin damuwa a injiniyanci. Diamita daban-daban sun dace da buƙatun aikace-aikace daban-daban, kamar haka: Ƙaramin diamita (6mm-12mm): Ana amfani da shi galibi ga ƙananan sassa, masu motsa jiki, da sandunan rarrabawa, kamar sandunan rarraba fale-falen bene, sandunan ɗaure bango, masu motsa lintel, da sauransu. Bayanan yau da kullun sune 6mm, 8mm, 10mm, da 12mm; Matsakaicin diamita (14mm-25mm): Mafi yawan amfani, wanda ya dace da abubuwan da ke ɗauke da damuwa na tsakiya kamar sandunan firam, ginshiƙan firam, gefun bangon yanke, da murfi. Bayanan yau da kullun sune 14mm, 16mm, 18mm, 20mm, 22mm, da 25mm; Babban diamita (28mm-50mm): Ana amfani da shi galibi a cikin manyan gine-gine, kayan aiki masu nauyi ko sassan da ke da nauyi mai yawa, kamar ginshiƙan firam na manyan sassa, manyan katako na gada, keji na ƙarfe na harsashi, da kuma ƙarfafa harsashin kayan aiki. Bayanan da aka saba amfani da su sune 28mm, 32mm, 36mm, 40mm da 50mm. II. Girman Waje da Sigogi na Haƙarƙari (Bukatun Dole)
Rebar HRB400E yana da sashe mai zagaye tare da haƙarƙari a tsawonsa. Haƙarƙarin an raba su zuwa haƙarƙari masu tsayi (daidai da axis na rebar) da haƙarƙari masu juyewa (a wani kusurwa da axis). Dole ne sigogin su cika waɗannan buƙatu don tabbatar da haɗin kai da aikin anga tare da siminti:
Tsarin Haƙarƙari Mai Juyawa:
Kusurwa: Kusurwa β tsakanin haƙarƙarin da kuma axis na rebar dole ne ta kasance tsakanin 45° da 60°. Idan diamita na rebar ya kai ≤ 12mm, za a iya faɗaɗa kusurwa yadda ya kamata zuwa 30°.
Tazara: Dole ne a daidaita tazara tsakanin haƙarƙari da l zuwa diamita. Misali, l ≤ 12mm lokacin da d = 6mm, l ≤ 20mm lokacin da d = 25mm, da l ≤ 25mm lokacin da d = 50mm. Bambancin tazara tsakanin haƙarƙari da rebar iri ɗaya bai kamata ya wuce ±10%.
Tsawo: Tsayin haƙarƙari mai ratsawa h dole ne ya cika ƙarfi da buƙatun haɗawa. Misali, h ≥ 0.8mm lokacin d = 10mm, da h ≥ 0.8mm lokacin d = 20mm. Lokacin h ≥ 1.5mm, da d = 40mm, h ≥ 2.4mm, da kuma ainihin tsayin da aka auna bai kamata ya zama ƙasa da 90% na ƙimar da aka saba ba. Tsarin Haƙarƙari Mai Tsawon Dogon Lokaci: Adadi: Kowane haƙarƙari mai tsayi yana buƙatar haƙarƙari guda biyu masu rarrafe daidai gwargwado. Faɗin b na haƙarƙari mai tsayi ya kamata ya dace da diamita, misali, b = 2.0mm lokacin d = 16mm, b = 3.0mm lokacin d = 32mm; Tsawon: Haƙarƙari mai tsayi dole ne ya gudana tsawon haƙarƙari ba tare da wani gibi ko katsewa ba, kuma saman haƙarƙari mai tsayi dole ne ya canza zuwa saman haƙarƙari mai ratsawa cikin sauƙi don guje wa yawan damuwa da gefuna masu kaifi ke haifarwa. Bambancin Sashe: Bambancin ainihin diamita na rebar dole ne ya kasance cikin ±0.4mm (misali, ga rebar mai diamita na 20mm, ainihin diamita da aka auna dole ne ya kasance tsakanin 19.6mm da 20.4mm); Bambancin kewaye na sashen bai kamata ya wuce ±2% ba, kuma ellipticity (bambanci tsakanin diamita mafi girma da mafi ƙarancin na sashen) dole ne ya kasance ≤0.4mm don tabbatar da siffar sashe na yau da kullun da rarraba damuwa iri ɗaya.