Operation skill of JS1500 concrete mixer

Starting and feeding of JS1500 concrete mixer: the compulsory concrete mixer must start without load and add material in operation, otherwise the machine will be damaged due to excessive starting torque. When concrete mixer is mixing concrete, it must be in accordance with the provisions feed rate of the ingredient ratio and water cement ratio calculation, aggregate degree of humidity should be determined in advance, and converse the theory proportion into construction mix proportion, and then according to the construction and mixer discharge capacity, calculate the quality of the composition of the material each time. Loading calculated value should be after the test, once determined strictly enforced, maximum aggregate size shall conform to the requirements of the regulations. Forced type concrete mixer has stricter requirement for maximum aggregate size, otherwise it will produce card materials. If the added material changes or the humidity changes due to rain or snowfall, it shall be re-measured, re-calculated and determined. Important concrete structures, charge ratios and water-cement ratios should be checked every 4 hours.

When adding materials to the mixing drum, the traditional methods are as follows :1. Put sand first, then add stones and cement in order, and add water in time; 2. add some water and sand first, and then load the stones, cement and the rest water; 3. When feeding hopper is used for feeding, feed all the materials into the mixing drum within 15 seconds according to the above order. The above methods can avoid cement sticking to the bucket wall, reduce wear and improve productivity, but the strength of concrete decreases, and the consumption of cement is large. The best method is to mix cement slurry first. It must also be pointed out that the feeding capacity of concrete mixer should meet the mechanical quota capacity. Too large feeding not only increases the load of the power machine, but also tends to make the concrete slurry spill and splash, and the mixing efficiency will be reduced. In addition, when the current batch of concrete has not been fully discharged, no new mixing materials shall be loaded.