grouting agent

Grouting agent
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:#.r Grouting agent has micro-expansion, no shrinkage, large flow, self-compacting, and extremely Low bleeding rate, high filling degree, thin airbag foam layer with small diameter, high strength, anti-rust and anti-rust, low alkali and chlorine-free, high adhesion, and excellent performance of green and environmental protection
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Main uses
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:#. Used for post-tensioned prestressed pipes The filled grouting material prevents the corrosion of prestressed steel and ensures effective stress transfer between the prestressed tendons and the concrete structure, so that the slurry in the channels is full and dense, maintaining a certain value range and completely wrapping the prestressed steel slurry after hardening. High strength and elastic modulus, expansion-free shrinkage and adhesion.
Text-d:..:#. Suitable for filling grouting of post-tensioned beam prestressed pipes, anchor grouting of ground anchor systems, leak-proof grouting of continuous wall heads, foundation grouting of curtain grouting equipment, and pad setting grouting. And beam-column joints, engineering emergency repairs and bolt anchoring, self-compacting without vibrating, micro-expansion, anti-oil penetration, anti-corrosion and anti-corrosion, anti-freeze and anti-seepage.
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Technical points
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:#Dosage amount :Grouting agent
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:#.cement
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:#. dosage is prepared into grouting material
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:#Water consumption of grouting material: The water-cement ratio used for grouting of prestressed concrete beam pipes is not greater than.
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:#.r, construction equipment
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:#.r The speed of the mixer should be greater than /The maximum linear speed of the blades is limited to /The shape of the blades should match the speed.
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:#.r The grouting machine uses a continuous grouting pump. The minimum graduation value of the pressure gauge should be less than . The maximum range should be such that the actual working pressure is within -%. within the measuring range.
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:#.r The storage tank has a stirring function.
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:#.r If a vacuum-assisted grouting process is used, the vacuum pump should reach a negative pressure of.
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:#.r Measurement: The weighing of cement, grouting agent (material), and water should be accurate to .%.
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:#.r Technical requirements for mixing technology
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:#.r Cleaning construction equipment : There should be no residue or water accumulation in the equipment after cleaning. The filter space of the mixer should be smaller than 1.
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:#.r Slurry mixing operation sequence: first add -% of the actual mixing water amount into the mixer, start the mixer and add all the slurry evenly while adding Stir until all the powder is added, stir again, and finally add the remaining -% mixing water and continue stirring before use.
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:#.r Fluidity test: An on-site fluidity test is conducted on each plate to check that the fluidity meets the requirements, and then the slurry can enter the storage tank through the filter. The body should continue to be stirred in the storage tank to ensure the fluidity of the slurry.
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:#.r Under normal circumstances, additional water should not be added to increase fluidity during the construction process.
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:#.r, Technical requirements for grouting process
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:#.r Grouting Remove debris and accumulated water in the beam tunnel before use.
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:#.r Before grouting, the grouting pump should be turned on to discharge a small amount of slurry from the grouting nozzle to eliminate air, water, and water in the grouting pipeline. The slurry can only be pressed into the beam channel when the fluidity of the discharged slurry is consistent with that in the mixing tank.
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:#.r The maximum pressure of grouting should not be exceeded. The filling degree of grouting should be such that the other end of the hole is full and discharged from the exhaust hole, which is the same as the specified fluidity. of slurry. After closing the slurry outlet, the pressure stabilization period should be maintained for no less than and no less than .
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:#.r For continuous beams or when performing pressure grouting, let the water-slurry suspension in the pipe flow freely from the outlet end and pump the slurry again until the outlet end. This process should be repeated several times while maintaining the pressure of a homogeneous slurry flowing out. After grouting, the compactness of the grouting should be checked from the anchor plate pressure/grouting outlet hole. If there is any looseness, additional grouting should be made in time to ensure that the hole is completely dense.
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:#.r If a vacuum-assisted grouting process is used, vacuuming should be performed first before grouting to stabilize the vacuum degree in the channel at -.~-. After the vacuum degree is stabilized, immediately open the valve at the grouting end of the pipeline and turn on the grouting pump for continuous grouting.
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:#.r Grouting sequence: first down and then up. The grouting of the same pipe should be done continuously. The time from stirring the slurry to pressing into the beam should be Small.
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:#.r Grouting sampling: During the grouting process, a set of standard curing specimens should be made for each hole beam to conduct compressive strength and flexural strength tests. Record the grout (including: grouting materials, mix ratio, grouting date, mixing time, outflow fluidity, slurry temperature, ambient temperature, holding pressure and time, vacuum degree, on-site grouting person in charge, supervision engineer, etc. ).
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:#.r, pipeline grouting time limit and technical requirements
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:#.r After the final tensioning is completed, the pipeline grouting should be carried out inside.
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:#.r After grouting, it can be delivered to the warehouse in advance, but it must be ensured that the strength of the d standard specimen reaches the specified value.
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:#.r, beam body, slurry and ambient temperature
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:#. r When grouting, the temperature of the slurry should be between ℃ and ℃. After grouting, the temperature of the inner beam and the environment should be greater than ℃. Otherwise, maintenance measures should be taken. When the temperature is higher than ℃, construction should be carried out at night or in the morning and evening. When the temperature is lower than ℃, the air content index should be increased appropriately according to the technical requirements of winter construction.
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