mso-hansi-font-family:"Times New Roman"">一、輕骨料承壓筒概述：

mso-hansi-font-family:"Times New Roman"">適用于粉煤灰陶粒和陶砂、粘土陶粒和陶砂、頁巖陶粒和陶砂、天然輕 "Times New Roman"">骨料等多孔輕骨料的檢驗(yàn)。輕骨料承壓筒是按《輕骨料試驗(yàn)方法》GB2842-81 "Times New Roman"">測定輕粗骨料顆粒的平均相對強(qiáng)度指標(biāo)的專用儀器。

mso-hansi-font-family:"Times New Roman"">二、輕骨料承壓筒技術(shù)參數(shù)：

mso-hansi-font-family:"Times New Roman"">筒體內(nèi)部尺寸為115mm "Times New Roman"">×100mm，垂直度偏差為-1mm

mso-hansi-font-family:"Times New Roman"">沖壓模外部尺寸為113 mm "Times New Roman"">×70mm，垂直度偏差為-1mm

mso-hansi-font-family:"Times New Roman"">筒體、導(dǎo)向筒和沖壓模均應(yīng)是正圓柱形，其上、下表面與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、輕骨料承壓筒使用方法：

1、篩取10 mso-hansi-font-family:"Times New Roman"">－20mm "Times New Roman"">粒級(粉煤灰陶粒允許采用10 mso-hansi-font-family:"Times New Roman"">￣15mm "Times New Roman"">的粒徑)的試樣51 mso-hansi-font-family:"Times New Roman"">，其中 10 "Times New Roman"">－15mm粒徑的體積含量應(yīng)占50% mso-hansi-font-family:"Times New Roman"">－70% "Times New Roman"">。

2、用承壓筒( mso-hansi-font-family:"Times New Roman"">帶筒底) "Times New Roman"">裝試樣，分別測定3 "Times New Roman"">次松散料重，取其算術(shù)平均值。對天然輕骨科，取測得的平均松散料重值乘以1.15 "Times New Roman"">的填充系數(shù)作為試樣量；對其他輕骨料，則乘以1.10 "Times New Roman"">的填充系數(shù)作為試樣量。

3、按上述試樣量稱取試樣，裝入承壓筒，先用木錘沿筒壁四周輕敲數(shù)次，然后裝上導(dǎo)向筒和沖壓模，檢查沖壓模的下刻度線是否與導(dǎo)向筒的上緣重合，如不重合，再輕敲筒壁四周直至完全重合為止。把承壓筒放在壓力機(jī)的下壓板上，以每秒約30 mso-hansi-font-family:"Times New Roman"">￣50kg "Times New Roman"">的速度勻速加荷。當(dāng)沖壓模壓入深度為20mm "Times New Roman"">時(shí)，記下壓力值。