Precast concrete components epoxy adhesive

GENERAL

Prefabricated segment assembly structure sewing glue is a two-component modified epoxy resin high thixotropic and high-strength adhesive, which is composed of a variety of organic and inorganic modified materials. It is specially used for the glue joint of precast segment suspension assembly and suspension construction process of overhead bridge erecting machine beam.

Application

The bridge erecting machine is used for the glue joint construction of Bridge prefabricate segment assembly; the glue joint splicing of general reinforced concrete prefabricate components; repair of component surface defects; self adhesion or mutual adhesion of civil structural materials. Hanging assembly and hanging construction (glue joint) of the midspan and side span of the prefabricate section of the bridge with the upward bridge erecting machine; splicing of the glue joint of the general reinforced concrete prefabricate components. It is applied in the epoxy structural adhesive for prefabricate concrete segment assembly.

FEATURE

1. It is featured with high strength, high elastic modulus, low creep, waterproof and corrosion resistance;

2. With high thixotropic paste, it is easy to stir and apply, without sagging and dripping;

3. It is easy to compact and the glue joint has no water seepage. It has strong bonding ability with concrete and can effectively transfer load;

4. It is less affected by the construction climate conditions, and can be constructed at wet surface and low temperature, with stronger adhesion under dry conditions;

5. The gluing can be operated for a long time, but it solidifies rapidly and the strength develops rapidly, which basically does not affect the prestressed tensioning;

6. The color difference between the two components is large. It is easy to observe the mixing uniformity, and the color after mixing is consistent with that of concrete;

7. It has good wettability with concrete, and the bonding surface does not need to be strictly treated;

8. It has a certain self-lubricating effect before curing, and the glue joint surface is easy to be pasted tightly to ensure that the glue joint is free from water seepage and the reinforcement is free from corrosion;

9. It has good toughness, fatigue resistance and impact resistance;

10. Safe and non-toxic.

PERFORMANCE

Inspection items		Technical requirement
Physical property	Colour	After curing, it is similar to the surface color of segmental concrete.
	Sizing time, min	≥20
	Bonding time, min	≥60
	Sagging resistance, mm	≥10
	Extrudability, mm2	150N	≥3000
		2000N	≥7500
		4000N	≥10000
	Shrinkage,%		≤0.1
	Thermal deformation temperature, ℃		≥50
	Water absorption,%		≤0.5
	Dissolution rate in water,%		≤0.1
	Nonvolatile content,%		≥99
Mechanical property	Compressive strength, MPa	12h	≥30
		24h	≥60
		7d	≥80
	Amount of compressed elastic film, GPa	Instantaneous	≥8000
	Amount of compressed elastic film, GPa	Delay (1H)	≥6000
	Viscous bending properties of concrete to concrete		Concrete body destruction
	Compressive shear strength of concrete to concrete, MPa		≥14
	Tensile shear strength of steel to steel, MPa		≥17
	Normal tensile bond strength of steel to concrete, MPa		≥3.0, and the concrete body is damaged

Package and storage

This product is packed in iron drums.

Component A is 5kg / barrel, and component B is 5kg / barrel.

Weight ratio: A: B = 3:1

Store in a dry, ventilated and cool place, preferably 5-25 ℃, and the storage temperature shall not exceed 40 ℃.

Storage period: 12 months.

Construction process

Determination of assembly construction scheme	Positioning of prefabricate segments of bridge erecting machine	Clean the assembly surface	Segment trial assembly adjustment	Joint glue	Gluing of splicing surface
Gluing of splicing surface	Apply temporary prestress	Remove glue overflow	Clean the assembly surface	Solidification	Apply permanent prestress
Cable hole （EGM100）grouting	Subsequent construction