If you want the wet spraying effect of the wet concrete spraying truck to be smooth, it is important to choose the right concrete ratio!
The correct selection of concrete materials is especially important during the wet concrete spraying process of the wet concrete spraying trolley!
In order for the wet concrete spray trolley to operate smoothly, the quality of the concrete is crucial. Therefore, the raw materials for curing are selected according to the following requirements.
1) The cement is made of ordinary Portland cement, the appearance grid meets the design requirements, and on-site inspection is carried out in accordance with regulations.
2) Coarse aggregate is produced by qualified manufacturers to produce "limestone" gravel. The fineness modulus of this model is 2.5-3.0, the mud content does not exceed 3%, and the mud content does not exceed 1%.
3. Optimize the mixing ratio
Based on the design strength of shotcrete, consider its productivity, rebound rate, one-time spray thickness and concrete workability. The greater the water-cement ratio, the worse the quick-setting effect, the greater the rebound, the lower the strength of the concrete, and the lower the water-cement ratio. The structure is difficult to paint. Therefore, during the construction process, the construction mix ratio is continuously optimized to ensure the strength and control of the concrete. The slump is 120mm±20mm. Use HZS120 mixer to mix concrete. The mixing time is not less than 90 seconds and the transportation time is less than 2 hours. It can be mixed.