mso-hansi-font-family:"Times New Roman"">一、特点:
mso-hansi-font-family:"Times New Roman"">依据《GBT 4111-2013 mso-hansi-font-family:"Times New Roman"">砼小型砌块试验方法》《JCT 641-2008 mso-hansi-font-family:"Times New Roman"">装饰混凝土砌块》国家建材行业标准生产,适用于装饰混凝土砌块做抗渗性能试验,试件直径为100mm mso-hansi-font-family:"Times New Roman"">园柱体。试验装置测量精度高,设计精巧耐用,该方法操作简单,劳动强度小,能直接表述试件的抗渗性能。
mso-hansi-font-family:"Times New Roman"">二、砌墙砖抗渗试验装置概述:
mso-hansi-font-family:"Times New Roman"">抗渗试验装置包括有蓄水筒、试件压筒、橡胶密封垫。试件压筒安装于蓄水筒的底部,蓄水筒底部设有直径为20mm mso-hansi-font-family:"Times New Roman"">的圆孔,蓄水筒的筒体高度为150cm "Times New Roman"">,高出水位请用海绵吸出。
mso-hansi-font-family:"Times New Roman"">原理:通过蓄水筒中一定水位高度的水向筒底部的试件施加水压,经过一定的时间后,检验试件的剖面的水渗透深度来评价试件的抗渗性能。
mso-hansi-font-family:"Times New Roman"">三、参数:
mso-hansi-font-family:"Times New Roman"">蓄水筒内径:20mm "Times New Roman"">;
mso-hansi-font-family:"Times New Roman"">蓄水筒高度:150mm "Times New Roman"">;
mso-hansi-font-family:"Times New Roman"">试件压筒内径:100mm "Times New Roman"">;
mso-hansi-font-family:"Times New Roman"">四、砌墙砖抗渗试验装置使用说明:
1、试样制作:
mso-hansi-font-family:"Times New Roman"">在三个不同装饰砌块的装饰面上,采用直径为100mm mso-hansi-font-family:"Times New Roman"">的金刚石钻头直接取样。
mso-hansi-font-family:"Times New Roman"">将试样浸入(20 "Times New Roman"">±5)℃的水中,水面应高出试样200mm mso-hansi-font-family:"Times New Roman"">以上,2 "Times New Roman"">小时后将试样从水中取出,放在钢丝网架上滴水1 "Times New Roman"">分钟,再用拧干的湿布拭去表面的水。
mso-hansi-font-family:"Times New Roman"">试验应在标准试验环境下进行,即空气温度(20 mso-hansi-font-family:"Times New Roman"">±2 "Times New Roman"">)℃,相对湿度(50 "Times New Roman"">±10)% mso-hansi-font-family:"Times New Roman"">。
mso-hansi-font-family:"Times New Roman"">将试样表面清理干净后,在其侧面涂一层密封材料(如黄油),随即旋入或在其它加压装置上将试样压入试件压筒内,再与抗渗试验装置连接起来,使周围不漏水。
mso-hansi-font-family:"Times New Roman"">在30 "Times New Roman"">秒内往蓄水筒内加水,使水面高出试样上表面200mm "Times New Roman"">。
mso-hansi-font-family:"Times New Roman"">自加水时算起2 "Times New Roman"">小时后测量蓄水筒内水面下降的高度。
2、结果评论:
mso-hansi-font-family:"Times New Roman"">按三个试样上蓄水筒内水面下降的**高度评定。