Pre-stressing Pipeline Grouting material for Railway Bridge

Description Specifications Scope of Application FAQ Download

Description

VASA HGM-YJ-TL prestressed pipeline grouting material for Railway Bridge is specifically designed for post-tensioning prestressed pipe (hole) grouting. It is formulated from a variety of high-quality cementitious materials and high-performance additives. This product features excellent fluidity, stable slurry, adjustable setting time, no shrinkage, micro-expansion, high strength, and is non-corrosive to steel bars.

Specifications

PRODUCT INFOMATION

Product Technical Parameters	Packing Specification	25kg/bag
	Character	Gray powder
	Executive Standard	Q/CR 409-2017
	Shelf Life	6 months when stored unopened in a cool, dry place. Insulation measures should be taken when the temperature is below 5°C.
	Mixing Ratio	Grouting Material: Water = 0.26~0.28 (by weight)
	Reference Dosage	2-3t/m³
	Workable Environment	Temperature 5-35°C. Avoid outdoor construction in high temperatures, frost, direct sunlight, or windy/rainy weather.
	Operable Time	40 minutes

APPLICATION PROCEDURE

· Determine Water Addition: Follow the recommended water-cement ratio. Initially, add 4/5 of the water while stirring. Once the powder is fully added, stir for 2 minutes, then add the remaining water and continue stirring for another 2 minutes until the slurry is uniform.

· Duct Grouting Timing: Perform duct grouting within 48 hours after final tensioning. Ensure the duct is free of debris and water before grouting.

· Pre-Grouting Preparation: Before injecting the slurry into the duct, start the grouting pump to discharge a small amount of slurry. When the discharged slurry matches the flowability of the slurry in the mixing tank, it can be injected into the beam duct.

· Grouting Pressure: The grouting pressure should not exceed 0.6 MPa. Ensure the duct is fully filled with slurry until the vent at the other end discharges slurry with the same flowability as specified. After closing the discharge port, maintain a stable pressure of not less than 0.5 MPa for at least 3 minutes.

· Grouting Sequence: Grout from bottom to top and continuously for the same duct. The total time from mixing to the end of grouting should not exceed 40 minutes. Continuous stirring should be maintained before and during use.

· Temperature Considerations: The slurry temperature during grouting should be between 5°C and 35°C. The beam and surrounding environment should not be below 5°C for 3 days after grouting. For ambient temperatures above 35℃, choose cooler times for construction.

TECNICAL INFOMATION

The product's technical indicators meet the requirements of the "Technical Conditions for Grouting of Post-Tensioned Prestressed Concrete Beams for Railways" (Q/CR 409-2017):

No.	Item	Technical Specifications
1	Water-Cement ratio	0.30-0.33
2	Setting Time, h	Initial Setting	≥4
		Final Setting	≤24
3	Flowability, s	Initial Flowability	18±4
		Flowability after 30min	≤28
4	Bleeding Rate, %	24h Free Bleeding Rate	0
		Capillary Bleeding Rate after 3h	≤0.1
5	Pressure Bleeding Rate, %	0.22MPa (when duct height ≤1.8)	≤3.5
		0.36MPa (when duct height >1.8)
6	7d Strength, MPa	Flexural	≥6.5
		Compressive	≥35
7	28d Strength, MPa	Flexural	≥10
		Compressive	≥50
8	24h Free Expansion Rate, %	0-3
9	Air Content, %	2-4
10	Filling Degree	Qualified
11	Chloride Ion Content, %	≤0.06

FEATURES AND BENEFITS

· Good fluidity, high strength, no bleeding, no segregation.

· Good durability: Inorganic grouting material, non-corrosive to steel bars, durable and solid.

· Grouting with full early strength and micro-expansion.

· High filling capability: Can complete grouting in one go, resulting in dense and void-free slurry within the ducts.

· Non-corrosive to prestressed steel bars and firmly bonded with concrete.

Scope of Application

· Grouting for various post-tensioning prestressed railway bridge ducts.

· Grouting for large prestressed structures.

· Leak-stopping grouting at 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.