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傳統的外(wai)保溫(wen)施工工藝復雜,質量不可控因素(su)很多(duo),而外(wai)墻(qiang)保溫(wen)一體(ti)板在工廠保溫(wen)+裝飾一次成形,避免了現場施工的很多(duo)不確定性。那么(me)保溫(wen)裝飾一體(ti)板發生脫(tuo)落,究竟是哪(na)些原(yuan)因?
1、基層(ceng)(ceng)結(jie)構(gou)(gou)因素。框架(jia)結(jie)構(gou)(gou)外(wai)墻在砼(tong)梁柱和(he)砌體接縫(feng)處,易發生因砌體變形(xing)而(er)造成(cheng)的(de)保(bao)溫層(ceng)(ceng)破(po)壞(huai)。腳(jiao)手(shou)架(jia)洞口等未砌實,形(xing)成(cheng)保(bao)溫層(ceng)(ceng)局部基層(ceng)(ceng)不(bu)牢(lao)而(er)破(po)壞(huai)。外(wai)墻一(yi)體板的(de)裝飾(shi)構(gou)(gou)件固定不(bu)牢(lao)、移(yi)位,形(xing)成(cheng)推拉作用,使保(bao)溫層(ceng)(ceng)局部空鼓(gu)、產生裂紋后(hou)長期滲水,導(dao)致保(bao)溫層(ceng)(ceng)脫落;
2、抗壓(ya)措施不當(dang)。保(bao)溫(wen)板(ban)表面荷載過大,或對負風壓(ya)抵抗措施采(cai)用(yong)不合理,如(ru)沿海地區或高層建筑外(wai)墻采(cai)用(yong)非(fei)釘粘結合的粘結方式(shi),易(yi)使保(bao)溫(wen)板(ban)塊(kuai)被風壓(ya)破壞而空(kong)鼓脫(tuo)落;
3、墻體界(jie)面(mian)處理不當(dang)。除(chu)黏(nian)土磚(zhuan)墻外,其他墻體均應(ying)用界(jie)面(mian)砂漿(jiang)處理后再涂抹漿(jiang)體保溫(wen)(wen)材(cai)料(liao),否則易造成(cheng)保溫(wen)(wen)層(ceng)直接空鼓(gu)(gu)或(huo)界(jie)面(mian)處理材(cai)質(zhi)失效,形(xing)成(cheng)界(jie)面(mian)層(ceng)與主體墻空鼓(gu)(gu),連帶形(xing)成(cheng)保溫(wen)(wen)層(ceng)空鼓(gu)(gu)。保溫(wen)(wen)板(ban)表面(mian)也需要使(shi)用界(jie)面(mian)砂漿(jiang)處理,否則也會(hui)造成(cheng)保溫(wen)(wen)層(ceng)局部(bu)空鼓(gu)(gu);
4、錨(mao)固(gu)方式(shi)不安(an)全。保(bao)溫裝飾(shi)一(yi)(yi)(yi)體(ti)板(ban)(ban)(ban)可以采用粘錨(mao)結合,以粘為主,以錨(mao)為輔的外墻保(bao)溫裝飾(shi)一(yi)(yi)(yi)體(ti)化系統(tong)。錨(mao)固(gu)件(jian)(jian)對一(yi)(yi)(yi)體(ti)板(ban)(ban)(ban)安(an)裝的初定(ding)位即防止位移是(shi)(shi)非常重(zhong)要的,能有效增加系統(tong)安(an)全的保(bao)險系數,如果抹(mo)灰(hui)層出現空鼓而未(wei)發現,錨(mao)固(gu)件(jian)(jian)將有利于(yu)防止突(tu)然掉(diao)板(ban)(ban)(ban),但是(shi)(shi)如果粘結失效,錨(mao)固(gu)件(jian)(jian)是(shi)(shi)沒有效果的,一(yi)(yi)(yi)體(ti)板(ban)(ban)(ban)依舊會掉(diao)板(ban)(ban)(ban);
5、外力因(yin)素(su)。一些外力的因(yin)素(su)也會導(dao)(dao)致面(mian)(mian)磚脫(tuo)落,比如(ru)地基不均勻沉(chen)降引起結構物墻(qiang)體(ti)變形、錯位,造成墻(qiang)體(ti)嚴重開裂、面(mian)(mian)磚脫(tuo)落;風壓、地震等自然因(yin)素(su)也會導(dao)(dao)致面(mian)(mian)磚脫(tuo)落。
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