混凝土早期抗裂试验装�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><strong><span><strong>混凝土早期抗裂试验装�?/strong></span></strong><span>简介：</span></p><p><span></span><span>适用于测试混凝土试件在约束条件下的早期抗裂性能。约束方法以尺寸丹�/span><span>800mm</span><span>��</span><span>600mm</span><span>��</span><span>100mm</span><span>的平面薄板型试件为标准试件，混凝土试件的表面积为</span><span>0.48</span><span>㎡，内部置有裂缝诱导发生器、�/span></p><p><strong><span><strong>混凝土早期抗裂试验装�?/strong></span></strong><span>结构原理</span><span>:</span></p><p><span>1.</span><span>模具采用钢制模具，模具的四边用槽钢焊接而成，模具四边与底板通过螺栓固定在一起。底板采用不小于</span><span>5mm</span><span>厚的钢板供应商河北大宏实验仪器有限公司，并在底板表面铺设聚乙烯薄膜隔离层、�/span></p><p><span>2.</span><span>应力诱导发生器模具内的应力诱导发生器共有七根，分别用</span><span>50mm</span><span>��</span><span>50mm�?0mm</span><span>��</span><span>40mm</span><span>角钢不�/span><span>5mm</span><span>��</span><span>50mm</span><span>钢板焊接组成，并平行于模具短边与底板固定、�/span></p><p><span>3.</span><span>选配的风扆�/span><span>(</span><span>另购）：所用风扇能够使试件表面中心处风速达�?/span><span>5m/s</span><span>、�/span></p><p><span>4.</span><span>选配的读数显微镜</span><span>(</span><span>另购）：应采�?/span><span>40</span><span>倍的读数显微镜（分度值为</span><span>0.01mm</span><span>）测量混凝土裂缝、�/span></p><p><strong><span><strong>混凝土早期抗裂试验装�?/strong></span></strong><span>使用说明９�/span></p><p><span>1.</span><span>实验宜在恒温恒湿室中进行，应能使室温保持低�/span><span>20</span><span>��</span><span>2</span><span>℃，相对湿度保持�?/span><span>60</span><span>��</span><span>5%</span><span>、�/span></p><p><span>2.</span><span>将混凝土浇筑至模具内供应商河北大宏实验仪器有限公司，混凝土摊平后表面应比模具边框略高，使用平板表面式振捣器或者采用捣棒插捣，控制好振捣时间，防止过振和欠振、�/span></p><p><span>3.</span><span>在振捣后，用抹子整平表面，使骨料不外露，表面平实、�/span></p><p><span>4.</span><span>试件成型</span><span>30</span><span>分钟后，应立即调节风扇直吹试件表面，使试件表面中心处风速为</span><span>5m/s＋�/span><span>风向平行于试件表面、�/span></p><p><span>5.</span><span>从混凝土搅拌加水开始起算时间，�?/span><span>24</span><span>小时测读裂缝。裂缝长度以肉眼可见裂缝为准，用钢直尺测量其长度，取裂缝两端直线距离为裂缝长度。应测量每条裂缝的长度、�/span></p><p><span>6.</span><span>当一个刀口上有两条裂缝时，可将两条裂缝的长度相加，折算成一条裂缝。裂缝宽度用放大倍数至少</span><span>40</span><span>倍的读数显微镜（分度值为</span><span>0.01mm</span><span>）测量，应测量每条裂缝的</span><span>*</span><span>宽度、�/span></p><p><span>7.</span><span>根据混凝土浇�?/span><span>24h</span><span>后测量得到裂缝数据，计算平均开裂面积，单位面积的裂缝数目和单位面积上的总开裂面积、�/span></p><p><strong><span><strong>混凝土早期抗裂试验装�?/strong></span></strong><span>注意事项９�/span></p><p><span>1.</span><span>本标准的使用者在使用前有责任确立合适的安全健康规程，并确定法规限制的适用性、�/span></p><p><span>2.</span><span>使用完毕后，应擦净仪器供应商河北大宏实验仪器有限公司，清除仪器周围残留胶砂，用轻油稍稍润滑推杆、桌面和凸轮表面、�/span></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div style="padding:10px;">暂无相关方案、�/div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); var _index = $(this).index(); $(".xgfa_box").css("display","none"); $(".xgfa_box").eq(_index).css("display","block"); }); }); </script>  <div class="xgzl"> <div class="cxd_tit"><span></span>相关资料</div> <div class="xgzl_box"><div style="padding:10px;">暂无数据、�/div> </div> </div>  <div class="yhpl"> <div class="cxd_tit"><span></span>用户评论</div> <form id="FormComments" action="" method="post" onsubmit="return false"> <input name="SaveProComments" id="SaveProComments" type="hidden" value="yes" /> <input name="ProductID" id="ProductID" type="hidden" value="268534" /> <input name="ProQuality" id="ProQuality" type="hidden" value="10" /> <input name="ProService" id="ProService" type="hidden" value="10" /> <input name="ProUsability" id="ProUsability" type="hidden" value="10" /> <input name="ProCostperformance" id="ProCostperformance" type="hidden" value="10" /> <div class="yhpl_pf"> <div> <p>产品质量</p> <div><span id="Quality" class="stars star10"></span><span id="Quality_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>售后服务</p> <div><span id="Service" class="stars star10"></span><span id="Service_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>易用�?/p> <div><span id="Usability" class="stars star10"></span><span id="Usability_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> <div> <p>性价毓�/p> <div><span id="Costperformance" class="stars star10"></span><span id="Costperformance_Val" class="ScoreVal" curScore="10">10刅�/span></div> </div> </div> <div class="yhpl_pftit">评论内容</div> <textarea name="Comments" id="ProComments" onfocus="checklogin();" placeholder="分享产品使用经验/采购评价（不超过500字）">