Year1
- 包装：
- 牛皮纸袋包装
- 用量：
- 1.8-2.0吨/立方米
- 规格：
- 50kg/袋
The grouting agent (material) has the characteristics of micro expansion, no shrinkage, large flow, self-compacting, extremely low bleeding rate, high filling degree, thin air bag foam layer, small diameter, high strength, Excellent properties of rust prevention, low alkali and chlorine-free, high adhesion, and green and environmentally friendly. It does not contain oxides, chlorides, nitrous (acid) (salt) and other harmful components to steel bars. It is composed of high-performance plasticizer, surfactant, calcium silicon micro-expansion agent, hydration heat inhibitor, migration type The grouting agent is refined from rust inhibitor, nano-scale mineral silica-aluminum-calcium-iron powder, stabilizer or refined compound with low-alkali and low-heat Portland cement.
Main uses
Grouting material used for filling post-tensioned beam prestressed pipes, preventing corrosion of prestressed steel, ensuring effective stress transfer between prestressed tendons and concrete structures, and making the slurry in the channels Full and dense, the slurry maintains a certain value range and completely wraps the prestressed steel. After hardening, the slurry has high strength, elastic modulus, expansion, non-shrinkage and bonding force.
Suitable for filling grouting of post-tensioned beam prestressed pipes, anchor grouting of ground anchor systems, continuous wall head leakage grouting, curtain grouting equipment foundation grouting, pad setting grouting and beam-column joints, engineering emergency repairs and bolts Anchorage, self-compacting without vibrating, micro-expansion, anti-oil penetration, anti-corrosion and anti-corrosion, anti-freeze and anti-permeability. Used for pore grouting of high-strength steel prestressed concrete components, road and bridge reinforcement, ready for operation, and bonded to hardened concrete. It is firm and has no obvious traces of repair. The setting time of the slurry is controllable and moderate.
Technical points
Type: High-strength non-shrinkage grouting agent (material), super early strength grouting material
Dosage: The grouting agent is mixed with the amount of cement to prepare the grouting material
Water consumption of grouting material: The water-cement ratio used for grouting prestressed concrete beam pipes is not greater than.
Construction Equipment
The speed of the mixer should be greater than /, the maximum linear speed of the blade should be limited to /, and the shape of the blade should match the speed.
The grouting machine adopts 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 the range of -.
The storage tank has a stirring function.
If a vacuum-assisted grouting process is used, the vacuum pump should reach a negative pressure of.
Measurement: The cement, grouting agent (material), and water should be weighed accurately.
Technical requirements for mixing technology
Cleaning construction equipment: There should be no residue or water accumulation in the cleaned equipment, and the filter space of the mixer should be smaller than 1.
Slurry mixing operation sequence: first add the actual amount of mixing water to the mixer, start the mixer, add all the slurry evenly, stir while adding, stir after all the powder is added, and finally add the remaining amount -Mix water, continue to stir and use.
Fluidity test: An on-site fluidity test is conducted for each plate. After its fluidity meets the requirements, it can enter the storage tank through the filter. The slurry should continue to be stirred in the storage tank to ensure that the slurry of liquidity.
Under normal circumstances, additional water should not be added during the construction process to increase fluidity.
Technical requirements for grouting process
Before grouting, remove debris and accumulated water in the beam channels.
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 slurry in the grouting pipeline. When the fluidity of the discharged slurry is consistent with that in the mixing tank When, you can start pressing into the beam body channel.
The maximum pressure of grouting should not exceed . The filling degree of grouting should be until the other end of the hole is full and the slurry with the same fluidity as the specified fluidity is discharged from the exhaust hole. After closing the slurry outlet, a stabilization period of no less than 3 seconds should be maintained.
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 a homogeneous slurry flows out from the outlet end. Maintain this process under a pressure of Should be repeated - times. After grouting, the density of the grouting should be checked from the anchor plate pressure/grouting hole. If there is any lack of density, additional grouting should be made in time to ensure that the hole is completely dense.
If the vacuum-assisted grouting process is used, the vacuum should be evacuated first before grouting to stabilize the vacuum degree in the channel between The grout pump performs continuous grouting.
Grouting sequence: first down and then up. The grouting of the same pipe should be carried out continuously and completed at one time. The time from stirring the slurry to pressing into the beam body should be short.
Grouting sampling: During the grouting process, three sets of standard curing specimens should be made for each hole beam to conduct compressive strength and flexural strength tests, and the grouting should be recorded (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.).
Pipeline grouting time limit and technical requirements
The final tensioning is complete and the pipeline grouting should be carried out inside.
After grouting, it can be delivered to the warehouse in advance, but it must be ensured that the strength of the standard specimen reaches the specified value.
During grouting, the temperature of the slurry should be between ℃ and ℃. Within 3 days of grouting and grouting, the temperature of the beam body and the environment should be greater than ℃. Otherwise, maintenance measures should be taken. When the construction temperature is higher than 3℃, night or morning and evening construction should be selected. When the temperature is lower than 3℃, it should be handled according to the winter construction technical requirements and the air content index should be increased appropriately.
Storage, transportation and packaging of grouting agent (material)
Packaging: The grouting agent (material) is packed in a sealed woven bag with inner plastic and outer outer.
Weight: The net weight of each piece of grouting agent (material) is.
The production date and batch number are indicated on the factory certificate.
Shelf life: Under standard storage conditions at normal temperature, the shelf life of the grouting material is days, and the shelf life of the grouting agent is days.
Storage conditions: Store in a cool, dry warehouse, waterproof, moisture-proof, damage-proof, and high-temperature (above °C).
Transportation conditions: Protect from rain and sun exposure, and keep the packaging intact.
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