雷氏夹膨胀值是多少技术参数: 1、在300克负荷下两针尖距离的大膨胀值≤17.5±2.5 2、去负荷后要求恢复正常状态度 10mm 3、净重 30g
雷氏夹膨胀值是多少使用说明: 1、先测量带有试件并经养护的雷氏夹两指针尖端的间距精确到0.5mm,并用编号做记录,按着将雷氏夹连同试件放入沸煮箱重蓖板上,指针朝上试件之间互补交*,然后在30±5min内加热至沸腾,并恒温3h±5min 2、后按测得沸煮后两指针尖端间距与沸煮的差值多少来判断试件的合格与否。 3、雷氏夹用后去掉式样及污物后放妥,严禁堆放或其它物体相互挤压。
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原创作者:河北献县鹏翼建筑仪器厂 |