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耐火澆注料的施工和使用

2023-03-02 17:15

耐(nai)火澆注(zhu)料的(de)施(shi)工由三個環節組(zu)成,即(ji)拌(ban)合、澆筑、養護。


1、拌(ban)(ban)(ban)(ban)合(he):必(bi)須(xu)采用(yong)(yong)強(qiang)制式攪(jiao)拌(ban)(ban)(ban)(ban)機或砂(sha)漿攪(jiao)拌(ban)(ban)(ban)(ban)機拌(ban)(ban)(ban)(ban)料(liao),不可(ke)用(yong)(yong)人工(gong)拌(ban)(ban)(ban)(ban)料(liao)。設備和工(gong)具(ju):強(qiang)制式或砂(sha)漿攪(jiao)拌(ban)(ban)(ban)(ban)機、水(shui)(shui)(shui)(shui)桶、磅秤、振動棒(bang)、工(gong)具(ju)鍬(qiao)、手推車等。拌(ban)(ban)(ban)(ban)合(he):先往(wang)攪(jiao)拌(ban)(ban)(ban)(ban)機中加(jia)入(ru)大袋(dai)料(liao),然后加(jia)入(ru)小袋(dai)料(liao),干拌(ban)(ban)(ban)(ban)1-2分(fen)鐘后,方可(ke)出料(liao)供(gong)澆注使(shi)用(yong)(yong)。含(han)(han)水(shui)(shui)(shui)(shui)量(liang)(liang)的(de)(de)判斷方法(fa):為判斷攪(jiao)拌(ban)(ban)(ban)(ban)料(liao)的(de)(de)水(shui)(shui)(shui)(shui)分(fen)含(han)(han)量(liang)(liang)是否合(he)適,可(ke)采用(yong)(yong)一種簡便的(de)(de)“手捏成團”方法(fa)進行測試:如果球(qiu)團變形從手縫中流出,則(ze)表示含(han)(han)水(shui)(shui)(shui)(shui)量(liang)(liang)過多:如果球(qiu)團開裂、散落,則(ze)表示含(han)(han)水(shui)(shui)(shui)(shui)量(liang)(liang)太少(shao)。拌(ban)(ban)(ban)(ban)合(he)用(yong)(yong)水(shui)(shui)(shui)(shui)量(liang)(liang):以該批產品使(shi)用(yong)(yong)說明書上給出的(de)(de)用(yong)(yong)水(shui)(shui)(shui)(shui)量(liang)(liang)為標(biao)準(zhun),嚴格掌(zhang)握(wo)用(yong)(yong)水(shui)(shui)(shui)(shui)量(liang)(liang),并準(zhun)確計量(liang)(liang)。注意事項:


①施工(gong)(gong)(gong)過程所用的(de)工(gong)(gong)(gong)具如攪拌器、水(shui)桶、工(gong)(gong)(gong)具鍬等(deng)(deng)需預(yu)先清理干凈,不得混(hun)入(ru)石灰、砂礫、硅(gui)酸鹽水(shui)泥(ni)等(deng)(deng)其它雜物(wu)。



②拌合時用(yong)水必須(xu)是清潔的(de)自來水。在可振動出(chu)漿的(de)情況下,盡量少用(yong)水,已(yi)達(da)到較好(hao)的(de)施工效果。


③每次(ci)拌合量不易(yi)過多,應根據攪拌機的種類(lei)型號而(er)定,否則會造成(cheng)攪拌機卡(ka)滯,停轉(zhuan)。澆筑剩余的已凝結的塊料(liao)不能加水再次(ci)拌合使用。


④施(shi)工現場(chang)溫(wen)(wen)度必須(xu)在5—30℃之間,如施(shi)工現場(chang)氣(qi)溫(wen)(wen)低于(yu)5℃,必須(xu)采(cai)取相(xiang)應的(de)升溫(wen)(wen)保護措施(shi)方可施(shi)工:如現場(chang)氣(qi)溫(wen)(wen)高于(yu)30℃,必須(xu)采(cai)用相(xiang)應的(de)降溫(wen)(wen)保護措施(shi)方可施(shi)工:否則,會(hui)造成產品施(shi)工困(kun)難(nan)或性能下降。


2、澆(jiao)(jiao)筑(zhu)施(shi)(shi)工:檢(jian)(jian)查(cha):澆(jiao)(jiao)筑(zhu)料(liao)(liao)(liao)施(shi)(shi)工前必(bi)(bi)須檢(jian)(jian)查(cha)錨固(gu)件(jian)是否焊(han)牢,500℃以(yi)(yi)上(shang)部(bu)位要(yao)(yao)采(cai)用耐熱(re)抓釘。錨固(gu)件(jian)表面應涂以(yi)(yi)0.5-1mm厚的油漆或用塑料(liao)(liao)(liao)帶包裹(guo),以(yi)(yi)緩沖(chong)受熱(re)后的膨脹力(li),并將(jiang)模具內雜物清除。澆(jiao)(jiao)筑(zhu)時(shi)(shi)間控制:新拌合好(hao)的澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu)料(liao)(liao)(liao)應迅(xun)速進行澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu),一般應在20分鐘內澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu)完(wan)畢。澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu):將(jiang)拌合好(hao)的澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu)料(liao)(liao)(liao)倒入模具內,并及時(shi)(shi)插入振動(dong)棒振搗(dao),振搗(dao)要(yao)(yao)均勻,待澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu)料(liao)(liao)(liao)表面翻(fan)漿呈流動(dong)狀態時(shi)(shi)在移動(dong)振動(dong)棒,移動(dong)速度(du)為1-2米(mi)/分鐘。拔(ba)出振動(dong)棒時(shi)(shi)速度(du)要(yao)(yao)慢。澆(jiao)(jiao)筑(zhu)后現(xian)場溫(wen)度(du)要(yao)(yao)求(qiu)控制:澆(jiao)(jiao)注(zhu)(zhu)(zhu)(zhu)完(wan)畢后未凝結之(zhi)前,現(xian)場溫(wen)度(du)必(bi)(bi)須保持在5℃以(yi)(yi)上(shang)(5-30℃),現(xian)場溫(wen)度(du)低(di)于5℃,必(bi)(bi)須采(cai)取相應的升(sheng)溫(wen)保護措施(shi)(shi),否則會(hui)造成緩凝,導致產品性(xing)能下降。

注意事項:

①震(zhen)動后的澆(jiao)注料表(biao)面(mian)宜(yi)保(bao)持自然,不宜(yi)用工具抹光,更不允許在表(biao)面(mian)撒(sa)水泥(ni)細粉(fen)抹光。

②振動(dong)棒(bang)要有備用,以免在(zai)振動(dong)棒(bang)出(chu)現故障時,備用棒(bang)能(neng)及時啟用。

③施(shi)工完(wan)畢(bi)后,施(shi)工體24小時內,特別是澆注(zhu)料(liao)在硬化之前,嚴禁(jin)挪動、震動或搗打,否則,澆筑體會產(chan)生裂紋甚至完(wan)全(quan)破壞。

④澆注料應連續(xu)(xu)施工(gong),因各種(zhong)原因不能連續(xu)(xu)施工(gong)時(shi),可留施工(gong)縫,并且留在膨(peng)脹縫處,否則(ze)施工(gong)縫做成麻面,即(ji)在澆注料上劃深10mm,寬20mm左(zuo)(zuo)右的(de)十字溝,間距100mm左(zuo)(zuo)右。


3、養(yang)護:工具(ju):聚乙(yi)烯(xi)塑料(liao)薄(bo)(bo)膜(mo),草(cao)袋(dai)等。環境溫(wen)度(du)要求(qiu)與控制:澆注體(ti)的養(yang)護溫(wen)度(du)在(zai)15-35℃之間(jian)為(wei)宜,超出此溫(wen)度(du)區間(jian),應采取相應的升溫(wen)或降溫(wen)措施,否則會造(zao)成產品使(shi)用性能下降。養(yang)護:澆注料(liao)硬(ying)化(hua)后,需(xu)立即用聚乙(yi)烯(xi)塑料(liao)薄(bo)(bo)膜(mo)覆蓋住施工體(ti)表面,上面再加蓋濕(shi)草(cao)袋(dai),以防止(zhi)水分(fen)蒸發,促使(shi)水泥(ni)活化(hua)。硬(ying)化(hua)后,一(yi)天內禁止(zhi)敲打、震動,根據(ju)硬(ying)化(hua)情況,一(yi)般硬(ying)化(hua)24-30小時(shi)后可以拆(chai)模(mo)。拆(chai)模(mo)后,據(ju)需(xu)養(yang)護2天,養(yang)護時(shi)繼續加蓋聚乙(yi)烯(xi)塑料(liao)薄(bo)(bo)膜(mo)和(he)(he)濕(shi)草(cao)袋(dai)。氧(yang)化(hua)3天后,揭去聚乙(yi)烯(xi)塑料(liao)薄(bo)(bo)膜(mo)和(he)(he)濕(shi)草(cao)袋(dai)。使(shi)澆注體(ti)在(zai)空(kong)氣中自然干燥1天,即可烘(hong)烤。