Recently, many customers have complained that they are “excruciatingly miserable” due to pipe blockage. The editor understands that due to the different construction environments across the country, many places do not have commercial concrete mixing stations, and all are made of homemade concrete. Because workers do not have enough knowledge of the slump of concrete, they cannot grasp the optimal slump, which is not the case. The slump is high and low, and the fluidity of the stirred coagulation is not good, thus causing pipe blockage.
The following points should be noted when pumping homemade concrete:
1: Control of the water-cement ratio of homemade concrete.
Homemade concrete first needs to control the water-cement ratio (the water-cement ratio is the amount of water and cement). The water-cement ratio directly affects the fluidity of concrete and the strength of concrete. The smaller the water-cement ratio, the higher the strength of the concrete, but the poorer fluidity, which is not conducive to concrete pumping. If the water-cement ratio is larger, the strength of the concrete will be reduced and the workability will be worse, which is also not conducive to pumping. (In layman’s terms, both too dry and too thin concrete are not conducive to pumping. Only self-mixed concrete that is neither dry nor thin is the most suitable for pumping.
2: The importance of moistening pipes.
It is necessary to lubricate the pump pipe before starting work. Good or poor lubrication directly affects the efficiency of pumping. The traditional way of lubrication is to use cement mortar to moisten the pipe. This method of lubrication is not efficient and costly. It is very high, which is not environmentally friendly, trouble-free, and saves money. The editor recommends that you choose Yulong high-efficiency anti-corrosion pump truck lubricant to replace the traditional cement sand paddle lubricant. After years of use by the editor, this product is very good It has a very good moisturizing effect and can completely replace cement mortar moisturizing. The moistening effect is better than that of cement mortar. I have summarized several characteristics of the moisturizing agent, which are environmentally friendly, safe, efficient, money-saving, time-saving and labor-saving. ! The market price of pipe moisturizer produced by regular large manufacturers is around 7 yuan. It is recommended that you do not use the pipe moisturizer produced by small workshops. The pipe moisturizing effect is not good and it is very corrosive. Many friends around me feel the same way. How to use Use it strictly in accordance with the manufacturer's instructions.
Three: Operation tips of the pump truck master.
The slump of homemade concrete is not as precise as that of commercial concrete, and the fluidity will be reduced. Very poor. The editor has summarized many years of practical experience. Every time in the early stage of pumping, the pumping speed should be slowed down and follow the principle of "step by step". After the pumping is normal, return to the normal pumping speed. At the beginning The resistance inside the pipeline will be very large. In order to avoid pipe blockage right after construction starts, this is the most effective method.
Four: Support the work efficiency.
You may often You may encounter situations where the concrete cannot keep up due to various reasons and the machine always shuts down. A short shutdown does not matter, but there must be residual material in the hopper. If the pause time exceeds five minutes, you must turn on the pump to loosen it. You cannot stop it forever. If it takes more than half an hour and the concrete cannot keep up, the safest way is to clean the pipe first and then re-lubricate the pipe and pump it after the concrete arrives. </p
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