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ZL-P Splice Beam Adhesive

Bridge prefabrication and segmental assembly construction technology offers several advantages, including minimal impact on surrounding traffic, low requirements for the construction site's location, and significantly shorter construction timelines. This method essentially enables scaffold-free construction, ensures no disruption to existing traffic, and enhances the overall level of civilized construction practices—making it a key development direction in bridge engineering. It is particularly well-suited for constructing urban bridges that demand extremely high environmental standards. Among the critical processes involved are segment lifting and adhesive bonding for seamless assembly.

Category:

Modified epoxy adhesive

Product accessories:

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Product Description

Product Introduction

Bridge prefabrication and segmental assembly construction technology offers several advantages, including minimal impact on the surrounding environment and traffic, low requirements for the construction site's location, and short construction timelines. This method essentially enables scaffold-free construction, ensures no disruption to existing traffic, and enhances the level of civilized construction practices—making it a key development direction in bridge engineering. It is particularly well-suited for constructing urban bridges where environmental standards are exceptionally stringent. Among the critical processes involved are segment lifting and adhesive bonding for seamless assembly.

ZL-P Concrete Precast Segmental Assembled Construction Joint Adhesive (Cantilever Bridge Girder Structure Adhesive) is a high-thixotropic, high-strength adhesive composed of two components—A and B—based on modified epoxy resin. It is formulated with a blend of various organic and inorganic modifiers, specifically designed for bonding joints in the upward-type bridge girder erection process, including the precast segmental cantilever assembly and suspended construction techniques.

 

Product Advantages

1. High strength, high elastic modulus, low creep, and resistant to water and corrosion;

2. Highly thixotropic paste-like material, easy to stir and apply—no sagging or dripping!

3. Easy to compact, the adhesive bell is waterproof and exhibits strong bonding ability with concrete, effectively transferring loads; it is minimally affected by construction climate conditions, allowing for application on damp surfaces and even in low-temperature environments—plus, its bond strength actually increases under dry conditions.

4. The adhesive has a long working time, yet it cures quickly with rapid strength development, hardly affecting the prestress tensioning process.

5. Components A and B have significant color differences, making it easy to observe how evenly they are mixed; after blending, the resulting color matches that of concrete.

6. Exhibits excellent wettability with concrete, eliminating the need for rigorous treatment of the bonding surface;

7. Exhibits a certain degree of self-lubrication before curing, allowing the bonded surfaces to easily achieve tight contact, ensuring that the adhesive joint remains watertight and preventing corrosion of the reinforcing steel.

8. Excellent cutting performance, fatigue resistance, impact tolerance, and safe, non-toxic to use.

 

Parameter indicators

Performance

Trial Project

Test Conditions

GB50728 Class A Adhesive Technical Requirements

FIP Technology Requirements

Test Results

Physical Properties

Appearance

A+B

-

After mixing A and B, the result matches the color of the segment concrete surface.

Thixotropic paste-like material with uniform color that matches the concrete surface.

Density, g/cm³

A+B

-

-

1.7

Applicable time (workable duration), min

At the applicable temperature

-

-

40–120

Vertical flow rate, mm

Applicable under humidity conditions

≤2.0

At least 3mm without sagging

0 (10mm, no sagging)

Applicable gluing time, min

Applicable under warm seating conditions

-

≥20

20–60

Adhesive application time, min

Applicable under warm seating conditions

-

≥60

60-100

Shrinkage rate, %

Applicable under warm seating conditions

-

≤0.4

0.1

Water Solubility Rate, %

Applicable under warm seating conditions

-

≤0.1

0.03

Water absorption rate, 6%

Applicable under warm seating conditions

-

≤0.5

0.1

Colloid Properties

Tensile strength, MPa

12h

-

≥20

71

24h

-

≥40

82

7 days

≥65

≥70

94

Elastic modulus, GPa

Tensioned

≥3.2

-

8.1

Instantaneous Pressure

-

≥8

8.7

1-hour delayed compression

-

≥6

7.8

Bonding ability

Steel-to-steel tensile shear strength, MPa

23±2°C, 7 days

≥15

-

22

Shear strength (concrete bond diagonal shear), MPa

At the applicable temperature

-

≥12

31

Steel-concrete direct tensile bond strength, MPa

23±2°C, 7 days

≥2.5 and characterized by cohesive failure within the concrete

-

4.3 And it is cohesive failure within the concrete

Non-volatile content (solid content), %

105±2℃

≥99

-

≥99

 

Applicable Conditions

Using bridge girder launchers for the construction of adhesive joints in prefabricated bridge segment assembly; performing adhesive joint connections for typical reinforced concrete precast components; repairing surface defects of components; and applying self-adhesive or mutual adhesion techniques to civil engineering materials.

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