Cement-based Bridge Bearing Grout

Description Specifications Scope of Application FAQ Download

Description

VASA HGM-ZZ cement-based bridge bearing grout is composed of reasonably graded high-strength aggregates, high-strength cement as a binder, polymer toughening agents, and various additives that provide high fluidity, micro-expansion, anti-segregation, and anti-cracking properties. This forms a high-quality composite material designed for stabilizing the bridge bearings of railway bridges. The grout features self-leveling properties, high strength, and no shrinkage, resulting in a smooth and flat surface upon completion. It effectively addresses the issues of unevenness, cracking, and peeling commonly associated with traditional mortar.

Specifications

PRODUCT INFOMATION

Product Technical Parameters	Packing Specification	25kg/bag
	Character	Gray Mortar
	Executive Standard	TB/T 2331-1013
	Mixing ratio	water-powder ratio of 0.12-0.16(by weight)
	Shelf life	Storage unopened in a cool, dry place, the shelf life is 6 months. When the temperature is below 5°C, insulation measures should be done.
	Application Dosage	2-3t/m³
	Operable Environment	Temperature 5-35°C. Avoid outdoor construction in high temperatures, frost, direct sunlight, or windy/rainy weather.

TECNICAL INFOMATION

The finished product complies with the requirements outlined in TB/T 2331-1013 "Railway Bridge Pot Bearings".

No.	Item		Technical Specifications（Type I）
1	Initial Fluidity (20°C), mm		≥320
2	30min Fluidity (20°C), mm		≥240
3	Reaction Temperature, °C		Room Temperature
4	Free swelling ratio（28d）,%		0.02-0.1
5	Bleeding Rate, %		0
6	Elastic Modulus (28d), GPa		≥30
7	Flexural Strength, MPa	24h	≥10
		28d
8	Compressive Strength, MPa		8h	1d	28d
			≥20	≥40	≥50
9	Steel Bar Corrosion		No Corrosion

APPLICATION PROCEDURE

Construction Requirements:

· Roughen the surface of the bearing support pad stone, remove debris from the anchor bolt holes, and soak the support pad stone surface with water until saturated, ensuring no standing water during construction.

· Position the bearing, insert small steel wedges around it, and adjust the bearing to the design elevation, leaving a 20-30mm gap between the bearing bottom and the support pad stone.

Grouting Formwork:

· After verifying the bearing's center position and elevation, install grouting formwork, ensuring reliable measures to prevent leakage during gravity grouting. Pre-measure the required grout volume, ensuring the actual grout volume does not significantly differ from the calculated value to avoid gaps.

· Grout from one side, avoiding simultaneous grouting from all sides. Start grouting continuously without interruption to minimize grouting time.

Mixing Requirements:

· Mix the grout at a water-powder ratio of 0.12-0.16 (by weight). Add water to the mixing bucket first, gradually add the weighed grout, and stir with an electric mixer until all powder is added, then continue stirring for 2-3 minutes until the grout is uniform.

Recommended Approach:

· After the grout reaches the specified strength, remove the formwork and steel wedges. Check for grout leakage, fill any gaps from the removed wedges, tighten the anchor bolts, and install the beam bearing bottom plate and bearing sealing board.

FEATURES AND BENEFITS

· High Fluidity: Fills all gaps in equipment foundations without the need for vibration, meeting connection structure requirements.

· High Stability: No shrinkage cracks after curing.

· Micro-expansion and Non-corrosive: Ensures tight contact between equipment and foundation without causing corrosion to steel bars or plates.

· Strong Durability: As an inorganic cement material, it has a service life longer than that of foundation concrete. It shows no significant strength changes after hundreds of fatigue tests and 50 freeze-thaw cycles. Strength increases significantly after being soaked in engine oil for 30 days.

Scope of Application

· Emergency repairs, track filling, and bearing grouting, particularly for high-speed railway bridge bearings and track filling.

· Installation of rubber bearings on various cast-in-place bridges for passenger railways.

· Anchoring joints of frame structures and reinforcing bridge joints.

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.