There are many reasons why the pipes of concrete pump trucks are blocked. You can learn from the editor's method to eliminate them one by one; I believe it will be helpful to all pump friends.
1. Is the laying of pumping pipelines reasonable?
When laying pipelines, pay attention to straight lines and avoid bends. Even if you need to turn, the turning angle should not exceed a 90-degree right-angle turn. If the pump pipe is a recycled pipe during use, the residual concrete needs to be Dispose of cleanly. The interface between the pipes should be connected with a sealing gasket to prevent water leakage. Based on the above, all problems can be artificially avoided, reducing the artificial increase in concrete pumping resistance during the concrete pumping process.
2. What is the standard for concrete slump?
Strictly speaking, self-mixed concrete at the construction site is not suitable for pumping with pumping equipment. Jianyi uses commercial concrete because the commercial concrete factory has a complete mixing ratio table, which can easily Good workability of concrete makes the concrete flow very well and will not segregate during pumping. Since there are no additives or fly ash added to self-mixed concrete, segregation is most likely to occur. During the construction process, most of them are pumped upwards or downwards. Concrete without additives will cause the aggregate and cement mortar to segregate, which will not have the wrapping effect. Just imagine if you pump stones, it can Don't you want to block the pipe? If in some areas where commercial concrete is not available, if it is a large-scale construction, try to contact the admixture manufacturer to purchase alkaline water agent, add it according to the mix ratio given by the manufacturer, and control the water-cement ratio, which will enhance the workability of the concrete. , suitable for pumping, greatly reducing the chance of pipe blockage.
3. Is the method of lubrication of the pump tube correct?
The pump pipe needs to be lubricated before concrete is pumped. Some workers may ask, why do we need to lubricate the pump pipe? Just imagine, the pump pipe is made of metal material. Although its surface is smooth, it is still very astringent and cannot meet the requirements for concrete pumping. It is necessary to artificially add lubricant to the pipe to facilitate the concrete pumping process. No pipe blocked, smooth flow. The traditional way of moistening pipes is to use cement mortar to moisten pipes. Cement mortar pipe moistening has many disadvantages, such as high usage costs. According to the current cost of cement, river sand, and transportation vehicles, the cost of one-time pipe moistening is at least 300~500. Yuan or so. After the pipes are moistened, most of the cement sand paddles are poured directly into the structure, which poses a huge safety hazard to the quality of the project! Now there is a new pipe moisturizing material that replaces cement sand paddle. Its name is "Yulong pipe moisturizing agent" and the effect is quite good. The pipe moistening effect is better than that of cement sand paddle. This material has the characteristics of low cost of use, saving money, trouble, labor, safety and environmental protection! The current retail price on the market is about 10 to 15 yuan per bag, and if you find a manufacturer for wholesale, it may be 6 to 7 yuan per bag. Generally, one bag is used for a pump truck within 50 meters, and one bag is used for a ground pump 25 meters away. This greatly reduces the cost of use and is worth using by everyone. As long as the slump of the concrete is well controlled, the pump pipe is well lubricated, and an experienced pump truck operator operates it well, there will basically be no pipe blockage.
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