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点击：<Script Language="Javascript" Src="/item/GetHits.asp?Action=Count&GetFlag=0&m=1&ID=1435"></Script>次 <script type="text/javascript" language="javascript"> function ContentSize(size) {document.getElementById('MyContent').style.fontSize=size+'px';} </script> 字体：<a href="javascript:ContentSize(16)">大</a> <a href="javascript:ContentSize(14)">中</a> <a href="javascript:ContentSize(12)">小</a> </div> <div style="margin-top:20px;"><div id="MyContent"><p class="MsoNormal"> <span lang="EN-US"> </span><span lang="EN-US" style="font-size: 14pt; font-family: 宋体;"> </span><span style="font-size: 14pt; font-family: 宋体;">珠光砂混凝土也称膨胀珍珠岩混凝土，是以珠光砂为主要骨料，普通水泥为胶结材料，加入掺合料及外加剂拌合而成，珠光砂混凝土的强度等级和导热系数是两个相互制约的指标，不易同时满足，需通过反复的实验调整确定。</span></p> <p class="MsoNormal"> <span lang="EN-US" style="font-size:14.0pt;font-family:宋体"> </span><span style="font-size:14.0pt; font-family:宋体">水泥应优先选用硅酸盐水泥或普通硅酸盐水泥，型号为<span lang="EN-US">425</span>为宜。砂料选择水洗砂，含泥量不大于<span lang="EN-US">3%</span>，泥块含量不大于<span lang="EN-US">1%</span>；选用的中凯公司生产的<span lang="EN-US"><a href="/html/xwzx/xyxw/1173.html">ZKL50-70</a></span>型珠光砂<span lang="EN-US">,</span>堆积密度为<span lang="EN-US">57kg/m</span>³，振实密度为<span lang="EN-US">68kg/m</span>³。安息角为<span lang="EN-US">33-37</span>度，常压下的平均导热系数为<span lang="EN-US">0.0022w/mk</span>。外加剂为<span lang="EN-US">FDN</span>高效减水剂，<span lang="EN-US">JY</span>混凝土引气剂和<span lang="EN-US">JW-3</span>早强防冻剂。其中高效减水剂和引气剂符合<span lang="EN-US">GB8076-1997</span>标准的技术要求。早强防冻剂符合<span lang="EN-US">JC475-2004</span>标准的技术要求。粉煤灰等级为<span lang="EN-US">I</span>级。拌合水为洁净的自来水。拌合物的塌落度为<span lang="EN-US">0-10mm</span>，水灰比为<span lang="EN-US">0.7</span>。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal"> <span lang="EN-US" style="font-size:14.0pt;font-family:宋体"> </span><span style="font-size:14.0pt; font-family:宋体">中凯公司研制的珠光砂混凝土重量配合比为<span lang="EN-US">400kg</span>的水泥，<span lang="EN-US">450kg</span>的砂，<span lang="EN-US">85kg</span>的<span lang="EN-US"><a href="/html/xwzx/xyxw/1173.html">ZKL50-70</a></span>珠光砂，<span lang="EN-US">8kg</span>的高效减水剂，<span lang="EN-US">4.5kg</span>的引气剂，<span lang="EN-US">10kg</span>的早强防冻剂，<span lang="EN-US">230kg</span>的粉煤灰，<span lang="EN-US">280kg</span>的水。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="text-indent:28.7pt;mso-char-indent-count:2.05"> <span style="font-size:14.0pt;font-family:宋体">珠光砂混凝土作为深冷设备基础的隔冷层，其施工方法和配合比的设计应根据其特殊的使用性能、施工条件及施工技术水平综合确定。<span lang="EN-US"><o:p></o:p></span></span></p> <p class="MsoNormal" style="text-indent:21.75pt"> <span lang="EN-US" style="font-size:14.0pt;font-family:宋体"> </span><span style="font-size:14.0pt;font-family:宋体">中凯公司按照上述配方做<span lang="EN-US"><a href="/"><span lang="EN-US"><span lang="EN-US">珠光砂混凝土</span></span></a></span>试块经河南省建筑科学研究院检测，<span lang="EN-US">28d</span>抗压强度为<span lang="EN-US">8.9MPa,</span>导热系数实测值为<span lang="EN-US">0.2129w/mk.</span>满足国家要求。<span lang="EN-US"><o:p></o:p></span></span></p></div> </div> <div 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