Chengde, Jinzhong grouting material - grouting material construction plugging Cause Analysis 
 A grouting material with than the poorly designed 
 In pumping the grouting material is based on a cylindrical shape, with the lubricating layer of water and cement mortar with the wall after the separation by pipeline. Therefore, the design of the grouting material mixing materials, you must ensure that the grouting material, the Chengde grout, Jinzhong grouting material cylinder passed adjustable pipe, pipe and hose input to the watering place. Grouting material such as a water loss slump and decreased the serosal reduce plugging. 
 Water-holding capacity of poor grouting material barely pumping, loss of lubrication due to the easy segregation of mortar. The grouting material bleeding, but also lead to plugging one of the reasons. 
 Too dry and hard grouting material can not be filled pump cylinder leaving the pumping pressure is too large, and difficult to pump. Dry literally grouting material common quality problems, it may be the construction time delays, the grouting material can also be caused due to climate impacts, the Chengde grouting material condensation of excessive actions, especially in the hot season. 
 The operator to observe the change in position of the grouting material mixing materials, such as mixing materials is not too many stones, too wet or too dry. Grouting material pump is the best tool for judging the quality of concrete pump instrumentation and even the sound of running the pump that the pump pressure of grouting material to send to the changes in the grout, the grout material composition, aggregate gradation, mixing materials consistency and version and efficiency and so on will affect the pumping pressure changes. Erratic changes in the pumping pressure, indicating that the grouting material quality control problems. Foreign objects of the grouting compound, including off the hardened grout from the mixer blade Chengde grout, the Jinzhong grouting material and not a mixture of cement group, will boot from plugging. 
 2, the pipeline defects 
 Pipeline defects in the pipeline is not completely clear the pipe as well as damaged or defective pipe joints, gaskets or welding rings and so on. Not thorough cleaning of the pipe, there are closed hard and fast grouting material, will impede the flow of the lubricating mortar is an important reason for the formation of plugging. Defective pipe joints, gaskets or welding will be due to the loss of slurry pipe blockage. 
 Elbow is too short or too much will increase the grouting material, Chengde grouting material, the Jinzhong grout to help send the pressure is too steep adjustable pipe due to pipe blockage of the pump pressure increases. When a sudden change of the diameter of the pipeline (such as short-adjustable tube), because the concrete can not pass through the smaller diameter pipeline plugging or card stone. 
 3, operating on the error 
 Grouting material pump to be operated by trained personnel and timely maintenance of the pump to keep the pump in good condition. Pumped to do the lubrication of the pump tube, due to insufficient lubrication mortar loss of lubrication caused by plugging instances have also occurred. 
 Grout, Chengde, Jinzhong grouting material watered when added to the pump tube, due to the increase in tube dry the cause plugging. Thus, the watering of the grouting material, the tube can only be removed and can not be added. 
 Assembly and Disassembly hose to be extra careful. Careless operation make the hose twisted, so that the local hose diameter narrowing, in the aggregate of the pipe blocked the passage of the lubricating mortar stuck. 
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