一、自闭性试验仪产品简介：

自闭性试验仪用于防水涂膜在水的作用下，经物理和化学反应使涂膜裂缝自行愈合、封闭的性能试验，适用于聚合物水泥防水涂料自闭性测试。
 the product introduction:
Self-closing tester is used for the performance test of waterproof coating film under the action of water, physical and chemical reaction to make the film crack self-healing and sealing. It is suitable for the self-closing test of polymer cement waterproof coating.

二、自闭性试验仪

工作原理：

在试验条件下，用规定方法使聚合物水泥防水涂膜产生裂缝，使试件裂缝处受规定的水压。报告自试件裂缝处发生渗水至渗水停止时间。
Second, the working principle:
Under the test conditions, the polymer cement waterproof coating film is cracked by a prescribed method, and the crack of the test piece is subjected to a predetermined water pressure. Report the water seepage to the seepage stop time from the crack in the test piece.

三、自闭性试验仪

技术参数：
♦连通管：90°，直径110mm
♦玻璃管：直径50mm，长度300mm
♦连通管中心距压板高度：200mm
Third, technical parameters:
♦Connecting tube: 90°, diameter 110mm
♦ Glass tube: diameter 50mm, length 300mm
♦Connecting tube center distance to platen height: 200mm

四、操作步骤：
♦将PP膜片切割成106mm的试片，在其中心位置用刀片切割出10*4mm的U形口，再用一
小片胶带固定，在PP膜片的另一面上分次涂覆按指定配比混合后的聚合物水泥防水涂料试料，使涂层厚度
为1. 5_2. 2mm。按照规定的方法养护、干燥。
♦除去试件背面的固定胶带，小心揭去事先切割的10*4mmPP膜片，使涂膜暴露，用0. 5mm
厚壁纸刀在暴露的涂膜中心切割出长5mm的裂缝。
♦在连通管水平方向的压板与连通管中间装好制备好的试件，涂层面朝向迎水方向，使压
板固定压紧，并在连接处用密封胶密封。
♦在连通管的垂直方向，安装带有玻璃管的压板，并在连通管与压板连接处用密封胶密封。
♦在玻璃管中加入23°C的清洁水，使液面至试件的中心高度为300ram，再试验过程中使液
面保持同样的高度，观察试件裂缝处的渗水情况，记录从注水到时间裂缝处不渗水的时间。
♦试验后的试件在标准条件下放置24小时，观察裂缝处是否闭合，若裂缝处封闭，则试验
通过。
ourth, the operation steps
♦ Cut the PP film into a 106mm test piece, and cut a 10*4mm U-shaped mouth with a blade at its center position, and then use one.
A small piece of tape is fixed, and the polymer cement waterproof coating sample mixed according to the specified ratio is applied to the other side of the PP film to make the coating thickness.
2mm。 2mm. Cured and dried according to the prescribed method.
The smear is 0. 5mm
A thick wallpaper knife cuts a 5 mm long crack at the center of the exposed film.
♦ Install the prepared test piece in the middle of the pressure plate and the communication pipe in the horizontal direction of the connecting pipe, and the coated surface faces the water-facing direction to make the pressure
The plate is fixedly pressed and sealed with a sealant at the joint.
♦ Install a pressure plate with a glass tube in the vertical direction of the connecting pipe and seal it with a sealant at the joint between the connecting pipe and the pressure plate.
♦ Add 23 ° C clean water to the glass tube to make the liquid level to the center height of the test piece is 300 ram, and then make the liquid during the test.
Keep the same height on the surface, observe the water seepage at the crack of the test piece, and record the time from the water injection to the time when the crack does not seep.
♦ After the test, the test piece is placed under standard conditions for 24 hours, and the crack is observed to be closed. If the crack is closed, the test is carried out.
by.

五、试验结果：
♦进行两次平行试验，报告两次试验结果及平均值，精确至1小时。
♦若出现下列情况，则试验无效，应重新试验。
♦试验开始时涂膜裂缝处未形成滴渗，出现喷水。
♦从试验开始到试件裂缝处不渗水时间小于2小时。
 V. Test results
♦ Perform two parallel tests and report the results of the two tests and the average value to the nearest hour.
♦ If the following conditions occur, the test is invalid and should be retested.
♦ No drip is formed at the crack of the coating film at the beginning of the test, and water spray appears.
♦ From the beginning of the test to the crack of the test piece, the water seepage time is less than 2 hours.