How to calibrate the aperture grouting consistency meter, and the technical parameters of the mortar

Road grouting: It usually refers to the use of cement slurry, mixed with external additives, before grouting with pressure clean water to flush the hole to be grouted, and then the cement slurry is pressed from one end of the hole, and the other end is closed after discharging the thick slurry. Increase the pressure to MPa for 3-5 minutes before finishing.

Method: 1. Before grouting should be cleared of debris and stagnant water in the hole of the beam body.

2. Before grouting, the sealing cover or cement slurry should be used to seal the gap of the anchor clip and other possible slurry leakage, and the grouting can only be done after the plugging material reaches a certain strength.

3. The grouting sequence is first down and then up, and the curved channel and vertical hole should be pressed from the grouting hole at the lowest point, and the exhaust hole at the highest point should be exhausted or drained.

4. Before the slurry is pressed into the beam orifice, the grouting pump should be turned on first, so that the slurry is discharged a little from the grouting nozzle to exclude the air, water and slurry in the grouting pipeline. When the fluidity of the discharged slurry is consistent with the fluidity in the stirring tank, it begins to press into the beam orifice.

5, the maximum pressure of the longitudinal or transverse channel grouting of the beam body should not be exceeded, when the hole is longer or when the grouting is used once, the maximum pressure should be; The pressure of the grouting of the vertical hole of the beam body should be. The grouting filling should reach the other end of the orifice and discharge the slurry with the same fluidity as the specified flow through the exhaust hole. After closing the pulp outlet, the pressure stabilization period should be maintained and not less than 3min.

6. Vacuum-assisted grouting process should be preferred. Before grouting should be carried out first, the vacuum degree in the hole is stabilized between. After the vacuum level is stable, the valve at the grouting end of the pipeline should be opened immediately, and the grouting pump should be opened at the same time for continuous grouting at the same time.

7. The grouting of the same hole should be carried out continuously and completed at one time. The time from the mixing of the slurry to the pressing into the beam should not exceed 40min.

8. After grouting should be checked from the grouting hole and the grouting hole, if there is any truth, it should be filled in time to ensure that the hole is completely compact.

9. For continuous beams or pressure slurry filling, the water in the hole should be allowed to flow freely from the outlet end. Pump the slurry again until there is a homogeneous slurry flowing out at the outlet end, and keep it under pressure for 3 5min. This process should be repeated 1 to 2 times.

It is enough to calibrate the water and then calculate it according to the density of the water at different temperatures. The volume of the consistency meter is 1725ml.

Measuring range:

Depth of immersion: 0

Immersion volume: 0

Minimum scale value (immersion depth): 1mm

The cone and the slide bar weigh 300 2 grams.