雅致專業防火涂料

    鋼結構防火涂料應用(yong)(yong)(yong)中，經常會碰到性(xing)(xing)價比(bi)問題(ti)。到底鋼結(jie)構防火(huo)涂(tu)料(liao)(liao)用(yong)(yong)(yong)厚型(xing)(xing)(xing)(xing)好，還(huan)是(shi)超(chao)(chao)薄型(xing)(xing)(xing)(xing)好(現在(zai)大(da)多已不(bu)適(shi)用(yong)(yong)(yong)薄型(xing)(xing)(xing)(xing)的(de)鋼結(jie)構防火(huo)涂(tu)料(liao)(liao))。目(mu)(mu)前(qian)國家防火(huo)規(gui)范(fan)上未明(ming)確使用(yong)(yong)(yong)厚型(xing)(xing)(xing)(xing)和(he)超(chao)(chao)薄型(xing)(xing)(xing)(xing)的(de)規(gui)定，只(zhi)規(gui)定了耐火(huo)等(deng)(deng)級，由(you)設(she)計(ji)單位根(gen)據(ju)規(gui)范(fan)來設(she)計(ji)決定。但有相當(dang)一(yi)部分(fen)設(she)計(ji)說明(ming)，也不(bu)規(gui)定使用(yong)(yong)(yong)厚型(xing)(xing)(xing)(xing)和(he)超(chao)(chao)薄型(xing)(xing)(xing)(xing)，只(zhi)說明(ming)耐火(huo)等(deng)(deng)級。通常而(er)言厚型(xing)(xing)(xing)(xing)防火(huo)涂(tu)料(liao)(liao)承(cheng)重(zhong)重(zhong)，超(chao)(chao)薄型(xing)(xing)(xing)(xing)防火(huo)涂(tu)料(liao)(liao)承(cheng)重(zhong)輕(qing)，在(zai)涂(tu)料(liao)(liao)選擇時要綜(zong)合評估才能確定厚與(yu)薄之分(fen)。目(mu)(mu)前(qian)市場大(da)致在(zai)電力、石化等(deng)(deng)企業和(he)體育場館鋼結(jie)構上，普遍情況為(wei)鋼柱(zhu)采(cai)用(yong)(yong)(yong)厚型(xing)(xing)(xing)(xing)防火(huo)涂(tu)料(liao)(liao)，梁及外(wai)檐結(jie)構的(de)建筑采(cai)用(yong)(yong)(yong)超(chao)(chao)薄型(xing)(xing)(xing)(xing)防火(huo)涂(tu)料(liao)(liao)，高層民用(yong)(yong)(yong)建筑框結(jie)構等(deng)(deng)用(yong)(yong)(yong)厚型(xing)(xing)(xing)(xing)，而(er)外(wai)檐裝飾(shi)性(xing)(xing)鋼結(jie)構采(cai)用(yong)(yong)(yong)超(chao)(chao)薄型(xing)(xing)(xing)(xing)防火(huo)涂(tu)料(liao)(liao)。

    在(zai)鋼(gang)(gang)結(jie)(jie)構防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料應(ying)用中(zhong)根據耐火(huo)(huo)(huo)性(xing)能(neng)選(xuan)擇(ze)防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料時(shi)(shi)，一(yi)(yi)般耐火(huo)(huo)(huo)性(xing)能(neng)在(zai)2小(xiao)(xiao)(xiao)時(shi)(shi)以內選(xuan)擇(ze)超(chao)薄(bo)型(xing)防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料，2小(xiao)(xiao)(xiao)時(shi)(shi)以上(shang)(shang)有(you)關消防(fang)(fang)部門一(yi)(yi)般均要求(qiu)采用厚(hou)(hou)型(xing)鋼(gang)(gang)結(jie)(jie)構防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料。這(zhe)里有(you)一(yi)(yi)個(ge)應(ying)用上(shang)(shang)的誤區。有(you)一(yi)(yi)部分企業，超(chao)薄(bo)型(xing)鋼(gang)(gang)結(jie)(jie)構防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料檢測報告為2小(xiao)(xiao)(xiao)時(shi)(shi)左右，實(shi)際工程設計(ji)要求(qiu)2.5~3小(xiao)(xiao)(xiao)時(shi)(shi)的鋼(gang)(gang)結(jie)(jie)構防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料，也提出使用2小(xiao)(xiao)(xiao)時(shi)(shi)耐火(huo)(huo)(huo)極限的超(chao)薄(bo)型(xing)鋼(gang)(gang)結(jie)(jie)構防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料，以增加厚(hou)(hou)度(du)來達到(dao)2.5~3小(xiao)(xiao)(xiao)時(shi)(shi)的要求(qiu)。這(zhe)是不正確的技術理念，耐火(huo)(huo)(huo)性(xing)能(neng)取決于防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料中(zhong)耐火(huo)(huo)(huo)材(cai)料的優化配(pei)比，一(yi)(yi)般超(chao)過2小(xiao)(xiao)(xiao)時(shi)(shi)耐火(huo)(huo)(huo)極限期，應(ying)采用厚(hou)(hou)型(xing)防(fang)(fang)火(huo)(huo)(huo)涂(tu)(tu)(tu)料為宜。

    國內防火涂料選擇(ze)中以生(sheng)產企業(ye)檢(jian)測厚度的高(gao)低決定(ding)涂料(liao)(liao)的價格(ge)(ge)高(gao)低，當然涂料(liao)(liao)厚度用(yong)量少，則(ze)涂料(liao)(liao)價格(ge)(ge)就便宜。以超薄型(xing)的2小時耐(nai)火極(ji)限為例，厚度在(zai)2毫(hao)米左(zuo)右，每平方米涂料(liao)(liao)用(yong)量(理論值)為3~3.2公(gong)斤(jin)/平方米，但目前國內有些(xie)企業(ye)，2小時厚度在(zai)1.7毫(hao)米，涂料(liao)(liao)用(yong)量為2.8公(gong)斤(jin)/平方米左(zuo)右，達(da)到了國外同(tong)類產品的先進水平。