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Injection Cement Grout Pump
Product Details:
Usage/Application | Industrial |
Pump Type | Rotary Pump |
Power Source | Electric |
Material | Mild Steel |
Brand | Harjai And Company |
HARJAI Hand operated High Pressure Cement Slurry Grouting Pump having discharge capacityof 600Ltr/Hr at Maximum Working Pressure of 10Kg/Cm²/140 psi. |
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Ducts should have grout opening at both ends. Grout vents at high, and low points of draped cables are normally not necessary for tendons up 120 m Length. However, low point drain vents should be provided in works located in freezing climates for draining rain water etc. For tendons made up of a number of wires, bars or strands the cross sectional area of the duct should be at-least twice larger than the nominal diameter of the wire, bar or strand. |
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Flushing of metal ducts may not be necessary in most cases. Historically flushing has used to clear the ducts of foreign materials and to wet the surfaces for better groutablility. In recent years grouting experience has indicated that flushing is not necessary and may in fact be undesirable in the case of large and long tendons due to the difficulty of fully removing the water from the duct. Ducts with concrete walls may be flushed with water to ensure that the concrete is wetted.
Well before commencement of the actual grouting operation, all anchorage recesses (at both ends of the cable being grouted) should be mortared up with the appropriate type of grout connector threaded in place. Allow the mortar to set. |
MIXING OF GROUT AND GROUTING: |
Grout can be manually mixed in drum or with a mechanical grout mixer (Agitator). Correct Amount of water should first be poured into the mixer/drum followed by correct quantity of Portland cement. SAND SHOULD NOT BE ADDED. Mixing should be of such duration as to obtain a uniform thoroughly blended grout (without excessive temperature increase in the case of mechanical mixing). The grout should be kept continuously agitated until it is pumped. Normally mechanical mixtures require 1 1/2 to 3 minutes to satisfactorily mix the grout and manual mixing takes about 3 to 5 minutes.
For grouting with HARJAI High Pressure Grout Pump should be placed over a bucket containing the mixed grout. When using HARJAI High Pressure Grout pump its sieved suction funnel should be placed inside the grout. In either case, the suction inlet of the grout pump should be kept low inside grout. Start pumping to check the operating of the pump so that grout starts to flow freely through the pumP. Continue pumping with steady even strokes and keep the grout pump bucket topped up with grout and keep the grout gently agitated whilst pumping. Do Not allow the level of Grout in the bucket to fall below the Suction inlet of the pump.
Once pumping has commenced it should be continued without ceasing until the duct concerned is full. When a member contains several ducts these should be grouted in order from the lowest to the highest. Always complete the full grouting of a member in one continuous series of operations. If a member is made-up of precast segments which are assembled together and post tensioned, grouting should be done after complete pre stressing of the entire beam whenever this possible. Do not grout if there is any danger of freezing weather occurring before the grout is set. If the pump tends to block keep the suction inlet sieve of pump manually cleaned whilst grouting. If this does not help, dismount the pump and pump clean water through it. On reconnecting, regard the duct as un grouted and pump enough additional grout through to fill the duct and provide 25% excess. This will ensure that no air pocket is left by the disconnection. |
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Injection Cement Grout Pump
Tags:
Laboratory Equipment
