Price of supply of prestressed duct grouting material for new bridge gauge
Grouting material for prestressed pipeline in new bridge specification
Contact information: * * * or * * * Cui Gong
Prestressed pipe grouting agent (new highway standard)
This product has passed the ISO9001 - 2008 international quality management system certification
Implement JTG/T F50-2011 Technical Code for Construction of Highway Bridges and Culverts
The pre-stressed pipe grouting agent developed by our company is a composite admixture package integrating high water reduction, micro expansion, anti segregation and reinforcement. When used, it is constructed in proportion of 1:9 (weight ratio) with P · O 42.5 cement.
Product use:
It is widely used for grouting of prestressed pipes of various beams, grouting of equipment foundations, anchor bolts and other components, as well as repairing defects such as shell grouting, concrete looseness, cracks and holes in nuclear power plants.
Product features:
※ Low water binder ratio: water binder ratio is only 0.30 ± 0.01;
※ High fluidity: the outgoing fluidity of the slurry can reach 10-12S, and the fluidity remains within 25S after 60min;
※ Suitable setting time: initial setting ≥ 5h, final setting ≤ 24h;
※ High stability: the 3h free bleeding rate of slurry and the 4h bleeding rate between steel wires are both 0;
※ Micro expansion: 0~2% expansion occurs in 3h, and the expansion rate is controlled between 0~2% in 28d;
※ Early strength height: 1d compressive strength ≥ 15Mpa, 28d compressive strength ≥ 50Mpa;
※ High durability: the frost resistance level of 28d is greater than F500, and the chloride ion diffusion coefficient of 28d is 1.25 × 10-12m2/s;
Main technical parameters
|
Test items
|
Prestressed pipe Grouting agent index
|
|
Chloride ion content,%
|
≤0.04
|
|
Setting time, h
|
Initial set
|
≥5
|
|
Final setting
|
≤24
|
|
Mobility, s
|
Outgoing fluidity
|
10~17
|
|
30 min fluidity
|
10~20
|
|
Bleeding rate,%
|
3h capillary bleeding rate
|
zero
|
|
24h free bleeding rate
|
zero
|
|
Pressure bleeding rate,%
|
0.22MPa
|
≤1
|
|
0.36 MPa
|
≤1
|
|
Compressive strength, MPa
|
7d
|
≥40
|
|
28d
|
≥50
|
|
Bending strength, MPa
|
7d
|
≥6.5
|
|
28d
|
≥10
|
|
Free expansion rate
|
3h
|
0~2
|
|
24h
|
0~3
|
|
Corrosion effect on reinforcement
|
No rust
|
| |
|
|
|
Construction description
In order to give full play to the performance of this product, a high-speed slurry machine must be used. The construction mix ratio is grouting agent: P · O 42.5 cement: mixing water=10:90:27 (weight ratio).
Packaging and storage
※ Packed in composite paper plastic bags, each bag has a net weight of 25kg;
※ Pay attention to moisture-proof and sun proof during transportation and storage;
※ The warranty period is 12 months.
GST duct grouting material
Product features:
1. Good fluidity, high strength, no bleeding, no layering.
2. Good durability, inorganic grouting material, no aging, no corrosion to reinforcement, durable and firm.
3. Grouting has the characteristics of plump early strength, slight expansion, etc.
4. The product has high filling property and can be used for one-time grouting construction. The slurry in the pipeline is dense without pores.
5. The prestressed reinforcement is not corroded and firmly bonded to the concrete.
6. It is easy to use. It can be used after adding water and mixing evenly on site 22~26%.
Product use:
● It is applicable to post tensioned beam prestressed pipe grouting, anchor grouting of ground anchor system, continuous wall head leak stop grouting and curtain grouting.
● It is applicable to equipment foundation grouting, beam column joints, engineering emergency repair and bolt anchoring.
● It is applicable to pore grouting of high degree steel prestressed concrete components and reinforcement of roads and bridges.
Technical indicators: (Executive standard: TB/T3192-2008)
● Mobility (s): initial value 18 ± 4; 30min value ≤ 30.
● Setting time（ h) : initial setting ≥ 4; Final setting ≤ 24.
●24h Free expansion rate (%): 0-3.
● Compressive strength（ Mpa）：7d≥35 Mpa；28d≥50 Mpa。
● Bending strength（ Mpa）：7d≥6.5 Mpa；28d≥10 Mpa。
●24h Free bleeding rate (%): 0
● Air content（ %）：1-3
● Pressure bleeding rate（ %）：≤3.5
●Cl Ion content (%): ≤ 0.06
Construction description:
1. The fabrication of prestressed reinforcement, installation of anchorage devices and clamps, application of prestress, grouting, etc. shall meet the design requirements.
2. It is recommended to add 22%~26% water for mixing prestressed pipe grouting materials. Add 80% - 90% of the actual mixing water into the mixer, start the mixer, evenly add all grouting materials, mix slowly while adding, and then quickly mix for 1 min, add the remaining 10% - 20% water, and continue mixing for 1 min.
3. The duration of grouting material from mixing to pressing into the duct is generally 30-45min, depending on the temperature.
4. The grouting material shall be continuously mixed before use and during grouting.
matters needing attention
● The slurry temperature shall be kept at 5 ℃ - 30 ℃, otherwise measures shall be taken to meet the conditions.
● The grouting material and water for prestressed pipes shall be weighed accurately, and the water shall be added in strict accordance with the determined water cement ratio, and the amount of water added shall not be adjusted at will.
Packaging And Storage
● The product is packed in kraft paper woven bag (with lining), with a net weight of 40 Kg/bag.
● The product must be stored in a dry and ventilated room. quality guarantee period 6 months.
Non shrinkage anti-corrosion prestressed duct grouting agent
The duct grouting agent is a kind of powdery additive. When a certain proportion (10% of the cement content) is added to the cement, water will be added to mix to form a shrinkage compensating and thixotropic grouting fluid. The additive also has the effects of water reducing, anti-corrosion, expansibility, rust resistance, etc., so that the ratio of water to cement is controlled at about 0.30, and high strength is obtained after grouting.
Execution standard JC/T986-2005 Cement based grouting materials JGJ/T70-2009 Standard for basic performance test methods of building mortar
TB/T3192-2008 Technical Conditions for Pipe Grouting of * * * Post tensioned Prestressed Concrete Beams
Main technical indicators of the product ：
|
performance index
|
Index requirements
|
|
Mobility
|
18 ± 4 seconds
|
|
Liquidity maintenance
|
≤ 30s
|
|
Static bleeding rate
|
3 hours,%
|
Less than 0.1
|
|
24 hours
|
Total absorption
|
|
Capillary bleeding rate,%
|
zero
|
|
Pressure bleeding rate,%
|
three point five
|
|
28d limited expansion rate
|
0－0.01%
|
|
Large free shrinkage in 24 hours
|
No shrinkage
|
|
setting time
|
Initial setting>4h
|
|
Final setting<24h
|
|
Filling degree
|
Anhydrous vapor, anhydrous capsule; No airbag with diameter greater than 3mm
|
|
Rust resistance
|
Rust resistance and anti-corrosion
|
|
compressive strength
|
28d>55Mpa
|
|
Flexural strength
|
28d>10 Mpa
|
Prestressed concrete beam pipe grouting agent (grouting agent) is a kind of powdery additive. When a certain proportion (10% of the cement content) is added to the cement, adding water and mixing will form a shrinkage compensating, thixotropic grouting fluid. The additive also has the effects of water reducing, anti-corrosion, expansibility, rust resistance, etc., so that the ratio of water to cement is controlled at about 0.30, and high strength is obtained after grouting.
Execution standard JC/T986-2005 Cement based grouting materials JGJ/T70-2009 Standard for basic performance test methods of building mortar TB/T3192-2008 Technical conditions for pipe grouting of * * * post tensioned prestressed concrete beams
Scope of application: Pipe grouting agent can be used for anchoring and grouting of prestressed bridge ducts to prevent underground water from corroding steel bars (such as stone anchoring) and steel strands (such as pretensioned steel cables). Because of its thixotropy, it is more suitable for grouting off the ground.
There are pre grouting and post grouting of anchor rod and steel strand in terms of application.
| performance index |
Index requirements |
| Mobility |
18 ± 4 seconds |
| Liquidity maintenance |
≤ 30s |
| Static bleeding rate |
3 hours,% |
Less than 0.1 |
| 24 hours |
Total absorption |
| Capillary bleeding rate,% |
zero |
| Pressure bleeding rate,% |
three point five |
| 28d limited expansion rate |
0－0.01% |
| Large free shrinkage in 24 hours |
No shrinkage |
| setting time |
Initial setting>4h |
| Final setting<24h |
| Filling degree |
Anhydrous vapor, anhydrous capsule; No airbag with diameter greater than 3mm |
| Rust resistance |
Rust resistance and anti-corrosion |
| compressive strength |
28d>55Mpa |
| Flexural strength |
28d>10 Mpa |
High performance grouting material for prestressed steel cable pipe
Type I is grouting material, which is composed of high-grade cement and a variety of inorganic and agricultural production system materials. It has the characteristics of good fluidity, low bleeding rate, early strength, micro expansion, and full grouting. It can be used for one-time grouting construction. The slurry in the duct is dense without pores, and the prestressed reinforcement is not rusted, and it is firmly bonded with the concrete as a whole. It is applicable to the grouting construction of post tensioned prestressed ducts, as well as the anchoring of equipment foundation, anchor bolts, road nails and other components, and the repair of concrete looseness, holes and other defects.
Type II grouting agent needs to be used together with cement. At the same time, it needs to be trial mixed first, and the mixing amount is 5-10% of the cement amount.
Executive standard: JTG/T F50-2011.
Usage and storage: the rotational speed of the mixer shall not be less than 1000 rpm, and the higher linear speed of the blades shall be limited to 10-20 m/s. Continuous grouting pump is adopted for grouting machine. The smaller graduation value of the pressure gauge shall not be greater than 0.1MPa. Before mixing, the construction equipment must be cleaned without residue. Moisten the equipment, drain the excess water in the equipment, check the filter screen of the mixer, and when the grouting material enters the storage tank from the mixer, it needs to pass through the filter screen, and the blank space of the filter screen is not more than 2 × 2mm.
When preparing for grouting, start the grouting pump to discharge the slurry from the grouting pipe and discharge air, water and slurry. When the fluidity of discharged slurry is consistent with that in the mixing tank, grouting can be started. Generally, the larger pressure of grouting should not exceed 0.6MPa. Grouting shall be carried out until the other end of the pipe is full and discharged, and until the slurry with the same fluidity as specified is discharged from the vent. After the slurry outlet is closed, a stable period of not less than 0.5MPa shall be maintained, which shall not be less than 5min.
After tensioning, grouting must be carried out within 48 hours. The ambient temperature shall not be lower than 5 ℃.
It is packed with inner plastic bag and outer composite bag. The net weight of each bag is 25-50kg, and the validity period is three months. It can still be used after passing the inspection beyond the validity period. Main technical parameters:
| Test items |
performance index |
| Water material ratio (%) |
0.26-0.28 |
| Setting time (h) |
Initial set |
≥5 |
| Final setting |
≤24 |
| Mobility (s) |
Initial fluidity |
10-17 |
| 60 min fluidity |
10-25 |
| Free bleeding rate (%) |
3h bleeding rate between steel wires |
zero |
| 24h |
zero |
| Pressure bleeding rate (%) |
0.36 MPa |
≤2 |
| Filling degree |
No air bag of more than 3mm, foam layer of more than 1mm thick, and water of more than 1ml |
| Compressive strength (MPa) |
3d |
≥20 |
| 28d |
≥50 |
| Bending strength (MPa) |
3d |
≥5 |
| 28d |
≥10 |
| Free expansion rate (%) |
3h |
0-2 |
| 24h |
0-3 |
Corrosion effect on reinforcement
|
