Pre-stressing Pipeline Grout for Road Bridge

Description Specifications Scope of Application FAQ Download

Description

VASA HGM-YJ-GL Pre-stressing Pipeline Grout for Road Bridge is a product specialized for post-tensioning prestressed pipe (hole) grouting construction. It is formulated from a variety of high-quality cementitious materials and high-performance additives, featuring excellent flowability, stable slurry, adjustable setting time, no shrinkage, slight expansion, high strength, and non-corrosiveness to steel reinforcement.

Specifications

PRODUCT INFOMATION

The finished product technical specifications comply with the requirements outlined in JTG/T 3650-2020.

No.	Item			Performance Index
1	Water-Powder Ratio			0.26~0.28
2	Setting Time/h	Initial Setting ≥5		≥5
		Final Setting ≤24		≤24
3	Flowability(25°C)/s	Initial Flowability 10~17		10~17
		30min Flowability		10~20
		60min Flowability		10~25
4	Bleeding Rate/%	24h Free Bleeding Rate		0
		3h Wire-to-Wire Bleeding Rate		0
5	Pressure Bleeding Rate/%	0.22MPa (when vertical hole height ≤1.8m)		≤2
		0.36MPa (when vertical hole height ≤1.8m)
6	Filling Capacity			Qualified
7	Compressive Strength/MPa		3d	≥20
			7d	≥40
			28d	≥50
8	Free Expansion Rate/%		3h	0~2
			24h	0~3
9	Flexural Strength/MPa		3d	≥5
			7d	≥6
			28d	≥10

TECNICAL INFOMATION

Product Technical Parameters	Packing Specification	25kg/bag
	Character	Grey mortar
	Executive Standard	JTG/T 3650-2020
	Mixing ratio	Powder: Water = 1:0.26-0.28 (by weight)
	Shelf life	6 months when stored unopened in a cool, dry place.
Construction Technical Parameters	Construction Environment	2-3t/m³
	Construction Consumption	Working temperature 5°C~35°C. Outdoor construction should be avoided in high temperature, frost, direct sunlight, or windy rainy weather. When the temperature is below 5°C, insulation measures should be done.
	Operable Time	40min

APPLICATION PROCEDURE

· Determine the water quantity based on the recommended water-cement ratio. Start by adding 4/5 of the water, gradually mixing while adding the powder. After adding all the powder, continue mixing for 2 minutes, then add the remaining mixing water and continue mixing for another 2 minutes until the slurry is uniform.

· Grouting of the ducts should be performed within 48 hours after the final tensioning. Before grouting, ensure there are no debris or standing water inside the ducts.

· Prior to injecting the grout into the ducts, activate the grout pump to expel a small amount of grout. Only proceed to inject into the beam ducts when the expelled grout's fluidity matches that in the mixing tank.

· The grouting pressure should not exceed 0.6 MPa. The grout filling should reach the opposite end of the duct and continue until the air vents expel grout with the specified fluidity. After closing the grout outlet, maintain a stabilizing pressure period of no less than 0.5 MPa for at least 3 minutes.

· Grouting should follow a bottom-up sequence. Grouting of the same duct should be continuous and completed in one go. The time from mixing the grout to completing the grouting should not exceed 40 minutes, and continuous mixing should be maintained before and during the injection process.

· During grouting, the grout temperature should be between 5°C and 35°C. Within 3 days after grouting, the temperature of the beam and the environment should not fall below 5°C. If the ambient temperature exceeds 35°C, construction should be scheduled during cooler periods.

FEATURES AND BENEFITS

· Excellent fluidity and high strength ensure minimal leakage and no layering issues.

· Exceptional durability is achieved through the use of inorganic grouting material, offering resistance to reinforcement corrosion, ensuring longevity, and robustness.

· Rapid development of full strength upon grouting, coupled with slight expansion and other advantageous traits.

· High filling capacity facilitates one-time grouting application, resulting in a dense, pore-free slurry within the pipeline.

· Prestressed steel bars exhibit corrosion resistance and form a strong bond with concrete.

Scope of Application

· Post-tensioned prestressed bridge grouting for various highway applications.

· Grouting of large-scale prestressed structural ducts.

· Sealing grouting at various concrete structure joints.

· Curtain grouting, anchoring grouting, void filling, or repair, etc.

FAQ

Q1: What are the main product series of VASA?

VASA's main product lines include tile and stone pasting series, waterproof mortar series, cement-based grouting material series, wall leveling and skimcoat series, inorganic flooring series, soil solidification products, etc.
Q2: Where is VASA's main production base?

VASA's main production bases are distributed throughout China, and there is also a factory in Johor Bahru, Malaysia.
Q3: What is VASA's production capacity?

The production capacity of VASA dry powder mortar products is approximately 7 million tons.
Q4: The production capacity of VASA dry powder mortar products is approximately 7 million tons.

The reference delivery time for VASA products is seven days within China, sea freight to South East Asia: 7-10 days; Europe/Americas: ~25–35 days; Latin America: ~20-45 days
Q5: Has VASA's product been certified for environmental protection? What are the certifications?

VASA's products have undergone environmental certification, including German GEV-EMICODE certification and French A+ certification.
Q6: What is the main packaging form of VASA products?

VASA's products are mainly packaged in valve pockets and transported on wooden pallets.
Q7: What are the auxiliary installation and construction supports?

We can provide construction videos of our main products to guide their construction.