mso-hansi-font-family:"Times New Roman"">一、轻骨料承压筒概述：

mso-hansi-font-family:"Times New Roman"">适用于粉煤灰陶粒和陶砂、粘土陶粒和陶砂、页岩陶粒和陶砂、天然轻 "Times New Roman"">骨料等多孔轻骨料的检验。轻骨料承压筒是按《轻骨料试验方法》GB2842-81 "Times New Roman"">测定轻粗骨料颗粒的平均相对强度指标的专用仪器。

mso-hansi-font-family:"Times New Roman"">二、轻骨料承压筒技术参数：

mso-hansi-font-family:"Times New Roman"">筒体内部尺寸为115mm "Times New Roman"">×100mm，垂直度偏差为-1mm

mso-hansi-font-family:"Times New Roman"">冲压模外部尺寸为113 mm "Times New Roman"">×70mm，垂直度偏差为-1mm

mso-hansi-font-family:"Times New Roman"">筒体、导向筒和冲压模均应是正圆柱形，其上、下表面与柱面的垂直度不大于1mm mso-hansi-font-family:"Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">三、轻骨料承压筒使用方法：

1、筛取10 mso-hansi-font-family:"Times New Roman"">－20mm "Times New Roman"">粒级(粉煤灰陶粒允许采用10 mso-hansi-font-family:"Times New Roman"">￣15mm "Times New Roman"">的粒径)的试样51 mso-hansi-font-family:"Times New Roman"">，其中 10 "Times New Roman"">－15mm粒径的体积含量应占50% mso-hansi-font-family:"Times New Roman"">－70% "Times New Roman"">。

2、用承压筒( mso-hansi-font-family:"Times New Roman"">带筒底) "Times New Roman"">装试样，分别测定3 "Times New Roman"">次松散料重，取其算术平均值。对天然轻骨科，取测得的平均松散料重值乘以1.15 "Times New Roman"">的填充系数作为试样量；对其他轻骨料，则乘以1.10 "Times New Roman"">的填充系数作为试样量。

3、按上述试样量称取试样，装入承压筒，先用木锤沿筒壁四周轻敲数次，然后装上导向筒和冲压模，检查冲压模的下刻度线是否与导向筒的上缘重合，如不重合，再轻敲筒壁四周直至完全重合为止。把承压筒放在压力机的下压板上，以每秒约30 mso-hansi-font-family:"Times New Roman"">￣50kg "Times New Roman"">的速度匀速加荷。当冲压模压入深度为20mm "Times New Roman"">时，记下压力值。