<***N lang=EN-US>塑料波纹管将有更大的市场空间【EPIN自动化】<***N lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: Arial; mso-font-kerning: 0pt">
<***N lang=EN-US>***N>
<***N lang=EN-US> 2003***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">年以来,在预应力工程材料中发生了一次巨大的革命,首先塑料波纹管得到了很好的应用和发展,因为它独有的优势很快征服了各大工程公司和电气配套公司。***N><***N lang=EN-US>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 塑料波纹管优点:***N> <***N lang=EN-US>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 当成孔材料受到破坏后,浆体是预应力混凝土结构中预应力钢材的**一道防护屏障。塑料波纹管是一种新型成孔材料,与金属波纹管相比,它具有以下优点:***N><***N lang=EN-US>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 塑料波纹管的原材料是***N><***N lang=EN-US>HDPE***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。它的耐腐蚀性能远远优于金属,不怕酸、碱腐蚀,它本身不腐蚀,能有效地保护预应力筋不受腐蚀。很多预应力结构承受着外界严重的影响,如除冰盐或盐水。当后张构件由于防水层的崩溃、微裂缝漏水和排水设施的阻塞或失效时,预应力筋就会可能受到腐蚀作用。***N><***N lang=EN-US>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 《***N><***N lang=EN-US>FIP***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">施工指南(***N><***N lang=EN-US>1990***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">)》中的“预应力筋的灌浆”指出,金属管没有**的防腐能力,不足以抵抗水的渗漏和到达浆体以及预应力筋。而塑料波纹管能为预应力筋提供一种远远优于金属波纹管的屏障保护作用,能防止有害物质穿透管道的污染,从而保证了后张预应力结构具有更好的耐久性;***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">同等条件下,***N><***N lang=EN-US>SBG(B)***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">塑料波管预留孔道的摩擦系数明显小于金属波纹管预留孔道的摩擦系数,减小了张拉过程中预应力的摩擦损失。***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 一般情况下,塑料波纹管的摩擦系数取***N><***N lang=EN-US>0.14***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">,而金属波纹管的摩擦系数取***N><***N lang=EN-US>0.25***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">;***N><***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">塑料波纹管的强度高,不怕踩压,不易被振捣捧凿破,其密封性能和抗渗漏性能高于金属波纹管,更适用于真空灌浆;塑料波纹管不导电,可以防止杂散电流腐蚀,而金属是电的良导体;塑料波纹管具有更好的耐劳性能,能大大提高构件的抗疲劳能力。***N><***N lang=EN-US>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> ***N>
<***N style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"> 从以上来看,塑料波纹管将有更大的市场空间。***N>
EPIN自动化 编辑制作