近期鋼(gang)價(jia)(jia)延續低迷，隨著通國規模的酷暑和旱季(ji)(ji)到來，熱鍍(du)鋅(xin)卷(juan)(juan)板(ban)價(jia)(jia)格商場逐漸(jian)進(jin)入需要(yao)旺季(ji)(ji)，海內鋼(gang)鐵商場或將(jiang)窄幅調整。在決策層兩手抓制度(du)措施(shi)落實狀況、貨銀本位(wei)度(du)定向寬松力度(du)加(jia)大的直觀層面利(li)好牽動下，商場信念逐漸(jian)趨穩，短期海內鋼(gang)價(jia)(jia)無望止跌(die)企穩;另一上面，以后鋼(gang)價(jia)(jia)殺跌(die)電能有余，而(er)上漲也仍然屏(ping)障重重。熱鍍(du)鋅(xin)卷(juan)(juan)板(ban)價(jia)(jia)格價(jia)(jia)錢(qian)或將(jiang)長期在于低位(wei)運行場面。

冷軋板廠家鍍鋅鋼板是為防止鋼板表面遭受腐蝕，延長其使用壽命，在鋼板表面涂以一層金屬鋅，這種涂鋅的薄鋼板稱為鍍鋅板。攀鋼冷軋板廠家按生(sheng)產及加工方法可分為以下(xia)幾類：熱(re)浸(jin)鍍(du)鋅(xin)(xin)鋼(gang)(gang)板(ban)(ban)。將薄(bo)鋼(gang)(gang)板(ban)(ban)浸(jin)入熔 微商貨源解的(de)鋅(xin)(xin)槽中(zhong)，使(shi)其(qi)表面粘附一層(ceng)鋅(xin)(xin)的(de)薄(bo)鋼(gang)(gang)板(ban)(ban)。目前主要采用連續(xu)(xu)鍍(du)鋅(xin)(xin)工藝生(sheng)產，即把成卷的(de)鋼(gang)(gang)板(ban)(ban)連續(xu)(xu)浸(jin)在熔解有鋅(xin)(xin)的(de)鍍(du)槽中(zhong)制成鍍(du)鋅(xin)(xin)鋼(gang)(gang)板(ban)(ban)；合金(jin)化(hua)鍍(du)鋅(xin)(xin)鋼(gang)(gang)板(ban)(ban)。這種鋼(gang)(gang)板(ban)(ban)也是用熱(re)浸(jin)法制造，但在出槽后，立即把它加熱(re)到５００℃左右，使(shi)其(qi)生(sheng)成鋅(xin)(xin)和鐵(tie)的(de)合金(jin)被膜(mo)。這種鍍(du)鋅(xin)(xin)板(ban)(ban)具(ju)有良好的(de)涂料的(de)密著性(xing)和焊接性(xing)。

重慶樓承板(ban)(ban)(ban)(ban)由于在高層建(jian)筑(zhu)(zhu)和大(da)跨度高聳結構方面的(de)(de)(de)(de)優(you)越性(xing)，使(shi)其(qi)在非(fei)居住建(jian)筑(zhu)(zhu)領(ling)域得(de)到了(le)(le)(le)(le)廣泛的(de)(de)(de)(de)應用(yong)。用(yong)環保鋼(gang)筋桁(heng)架(jia)樓承板(ban)(ban)(ban)(ban)建(jian)筑(zhu)(zhu)的(de)(de)(de)(de)房子(zi)比傳統(tong)房屋的(de)(de)(de)(de)重量要輕一(yi)倍(bei)，運用(yong)面積也進步(bu)百分(fen)之(zhi)五(wu)左右，這個就(jiu)是(shi)(shi)它(ta)一(yi)大(da)優(you)點(dian)自重輕強度高。依據不完整(zheng)的(de)(de)(de)(de)統(tong)計(ji)，我國在發作(zuo)地震時鋼(gang)筋桁(heng)架(jia)樓承板(ban)(ban)(ban)(ban)建(jian)筑(zhu)(zhu)的(de)(de)(de)(de)倒塌(ta)幾率(lv)簡(jian)直(zhi)是(shi)(shi)零，所以它(ta)的(de)(de)(de)(de)抗(kang)震性(xing)能好也是(shi)(shi)它(ta)的(de)(de)(de)(de)優(you)點(dian)之(zhi)一(yi)，由于鋼(gang)筋桁(heng)架(jia)樓承板(ban)(ban)(ban)(ban)建(jian)筑(zhu)(zhu)的(de)(de)(de)(de)一(yi)些構件、墻板(ban)(ban)(ban)(ban)等有關的(de)(de)(de)(de)建(jian)材都是(shi)(shi)在工(gong)(gong)(gong)廠里(li)完成(cheng)的(de)(de)(de)(de)，所以就(jiu)減少了(le)(le)(le)(le)現場(chang)施工(gong)(gong)(gong)的(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)量，縮(suo)短了(le)(le)(le)(le)施工(gong)(gong)(gong)的(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)時間(jian)，很契合產業化的(de)(de)(de)(de)請(qing)求，這個是(shi)(shi)它(ta)的(de)(de)(de)(de)優(you)勢，第(di)三個就(jiu)是(shi)(shi)它(ta)的(de)(de)(de)(de)可回收應用(yong)了(le)(le)(le)(le)，它(ta)能夠隨(sui)意的(de)(de)(de)(de)撤除和建(jian)造，關于環境不形(xing)成(cheng)污(wu)染，還節約了(le)(le)(le)(le)資(zi)源。

用(yong)(yong)(yong)(yong)電鍍(du)(du)(du)(du)法制(zhi)造這種(zhong)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)具(ju)有(you)良(liang)好的加(jia)工性。但鍍(du)(du)(du)(du)層較(jiao)薄，耐腐蝕性不(bu)如熱浸法鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)；單面(mian)鍍(du)(du)(du)(du)和雙面(mian)差鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。單面(mian)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)，即只在一(yi)面(mian)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)的產品(pin)。在焊(han)接、涂裝、防(fang)銹處理、加(jia)工等(deng)(deng)(deng)方(fang)面(mian)，具(ju)有(you)比雙面(mian)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)好的適應性。為(wei)克(ke)服(fu)單面(mian)未涂鋅(xin)(xin)(xin)(xin)(xin)(xin)的缺點，又有(you)一(yi)種(zhong)在另面(mian)涂以薄層鋅(xin)(xin)(xin)(xin)(xin)(xin)的鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)，即雙面(mian)差鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)；合(he)金(jin)、復(fu)(fu)合(he)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。它是用(yong)(yong)(yong)(yong)鋅(xin)(xin)(xin)(xin)(xin)(xin)和其(qi)他金(jin)屬如鉛、鋅(xin)(xin)(xin)(xin)(xin)(xin)制(zhi)成合(he)金(jin)乃(nai)至復(fu)(fu)合(he)鍍(du)(du)(du)(du)成的鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。這種(zhong)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)既具(ju)有(you)防(fang)銹性能，又有(you)良(liang)好的涂裝性能。 除上述(shu)五種(zhong)外，還(huan)有(you)彩色鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)、印花涂裝鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)、聚氯乙烯疊(die)層鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)等(deng)(deng)(deng)。但目前常用(yong)(yong)(yong)(yong)的仍為(wei)熱浸鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)。 鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)按(an)用(yong)(yong)(yong)(yong)途又可分為(wei)一(yi)般用(yong)(yong)(yong)(yong)、屋頂用(yong)(yong)(yong)(yong)、建(jian)筑外側板(ban)(ban)(ban)(ban)(ban)用(yong)(yong)(yong)(yong)、結構用(yong)(yong)(yong)(yong)、瓦壟板(ban)(ban)(ban)(ban)(ban)用(yong)(yong)(yong)(yong)、拉伸用(yong)(yong)(yong)(yong)和深沖用(yong)(yong)(yong)(yong)等(deng)(deng)(deng)鍍(du)(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)。

鍍(du)鋅(xin)(xin)(xin)帶鋼(gang)(gang)的(de)鋅(xin)(xin)(xin)層特性 電鍍(du)鋅(xin)(xin)(xin)層是不能形成(cheng)鋅(xin)(xin)(xin)花(hua)的(de)，熱(re)鍍(du)鋅(xin)(xin)(xin)層則有鋅(xin)(xin)(xin)花(hua)，其(qi)形成(cheng)過程(cheng)如下(xia)：當鍍(du)鋅(xin)(xin)(xin)帶從鋅(xin)(xin)(xin)鍋出來(lai)后，經氣刀(dao)的(de)噴吹，大(da)量(liang)鋅(xin)(xin)(xin)液被吹回鋅(xin)(xin)(xin)鍋，這時帶鋼(gang)(gang)表面(mian)還有純鋅(xin)(xin)(xin)層，呈液 態附在(zai)鋼(gang)(gang)板表面(mian)，在(zai)鋼(gang)(gang)板表面(mian)形成(cheng)大(da)量(liang)結晶(jing)核(he)，隨著鋼(gang)(gang)板上升冷(leng)卻(que)(que)，使結晶(jing)核(he)慢(man)慢(man)長(chang)成(cheng)鋅(xin)(xin)(xin)花(hua)。冷(leng)卻(que)(que)速(su)度(du)越(yue)(yue)快鋅(xin)(xin)(xin)花(hua)越(yue)(yue)小(xiao)，冷(leng)卻(que)(que)速(su)度(du)越(yue)(yue)慢(man)鋅(xin)(xin)(xin)花(hua)越(yue)(yue)大(da)。熱(re)鍍(du)鋅(xin)(xin)(xin)帶鋼(gang)(gang)在(zai)我國市場一直是緊缺品種。從20世紀(ji)90年代中期(qi)以(yi)來(lai)，每年都(dou)要(yao)從國外進口80-100萬t左右。隨著國內(nei)經濟的(de)發(fa)展，尤其(qi)是汽車、家電及建(jian)筑(zhu)業的(de)發(fa)展，對鍍(du)鋅(xin)(xin)(xin)帶鋼(gang)(gang)的(de)需求量(liang)也大(da)大(da)增加。

重慶(qing)樓承板分兩(liang)種。一種是把樓承板當做(zuo)承受拉(la)力的(de)鋼(gang)筋計(ji)(ji)算(suan)的(de)，另外一種是僅把樓承板作(zuo)為(wei)模(mo)板計(ji)(ji)算(suan)而不參(can)與受力的(de)。做(zuo)模(mo)板計(ji)(ji)算(suan)的(de)比較簡單，直接按照跨度(du)頂(ding)就(jiu)行了(le)。2米以下選(xuan)0.8的(de)，2-3米的(de)選(xuan)1.0的(de)。樓承板作(zuo)為(wei)受力鋼(gang)筋計(ji)(ji)算(suan)，就(jiu)按照模(mo)板的(de)選(xuan)用樓承板（或者加厚且只(zhi)能(neng)加厚），然后在計(ji)(ji)算(suan)配筋的(de)時候可以按照面積減少鋼(gang)筋用量。樓承板不能(neng)單獨(du)計(ji)(ji)算(suan)的(de)，它和整個樓板是一個體(ti)系的(de)。