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Delayed coagulation adhesive used for retard-bonded prestressed tendon

A technology for prestressing and retarding adhesives, which is applied in the direction of adhesives, adhesive types, non-polymer adhesive additives, etc., and can solve the problem of reduced viscosity of retarding adhesives, dripping of retarding adhesives, retarding Problems such as uneven coating of adhesive to achieve the effect of improving sensitivity, reducing cost and superior stability

Inactive Publication Date: 2009-11-04
CHINA JINGYE ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the sensitivity of epoxy resin to temperature, when passing through the outsourced PE extrusion equipment, the temperature of the retarding adhesive reaches nearly 300 degrees, the viscosity of the retarding adhesive decreases significantly, the fluidity increases, and the retarding adhesive appears dripping. Falling, resulting in uneven coating of the retarding adhesive on the steel strand, which in turn affects the indentation effect of the outsourcing PE

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Combine 100 kg of bisphenol-A epoxy resin with an epoxy equivalent between 180 and 250 g / equivalent, 20 kg of diol diglycidyl ether, 10 kg of dibutyl phthalate, and 5 kg A low-molecular polyamide resin with a molecular weight of 600 to 900, 0.1 kg of fumed silica, 50 kg of cement and 50 kg of calcium carbonate are stirred to form a paste, and then the paste is put into a three-roller to make After removing air bubbles, grinding and mixing, the retarding gel adhesive for retarding prestressed tendons of the present invention is obtained. The slow-gelling adhesive does not drip after passing through the outsourced PE extrusion equipment, and the slow-gelling adhesive can still be evenly coated on the steel strand.

Embodiment 2

[0018] Combine 100 kg of bisphenol-A epoxy resin with an epoxy equivalent between 180 and 250 g / equivalent, 80 kg of diol diglycidyl ether, 5 kg of dibutyl phthalate, and 25 kg A low molecular weight polyamide resin with a molecular weight of 600 to 900, 5 kg of organic bentonite, 80 kg of cement and 100 kg of calcium carbonate are stirred to form a paste, and then the paste is put into a three-roller to remove The air bubbles are ground and mixed to obtain the retarding gel adhesive for retarding prestressed tendons of the present invention. The slow-gelling adhesive does not drip after passing through the outsourced PE extrusion equipment, and the slow-gelling adhesive can still be evenly coated on the steel strand.

Embodiment 3

[0020] Combine 100 kg of bisphenol-A epoxy resin with an epoxy equivalent between 180 and 250 g / equivalent, 60 kg of diol diglycidyl ether, 20 kg of dibutyl phthalate, and 15 kg Low molecular weight polyamide resin with a molecular weight of 600 to 900, 3 kilograms of fumed silica, 100 kilograms of cement and 80 kilograms of calcium carbonate are stirred to form a paste, and then the above paste is put into a three-roller to make After removing air bubbles, grinding and mixing, the retarding gel adhesive for retarding prestressed tendons of the present invention is obtained. The slow-gelling adhesive does not drip after passing through the outsourced PE extrusion equipment, and the slow-gelling adhesive can still be evenly coated on the steel strand.

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PUM

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Abstract

The invention relates to a delayed coagulation adhesive used for retard-bonded prestressed tendon, comprising the components: 100 parts by weight of bisphenol-A type epoxide resin, 20-80 parts by weight of reactive diluent dihydric alcohol diglycidyl ether, 5-20 parts by weight of non-activated thinner, 5-25 parts by weight of low molecular weight polyamide resin curing agent, 0.1-5 parts by weight of thixotropic agent, 50-100 parts by weight of cement and 50-100 parts by weight of calcium carbonate. After being processed by an outer pack PE extrusion device, the delayed coagulation adhesive has no phenomenon of drippage and can be still evenly coated and wrapped around a steel stranded wire.

Description

Technical field [0001] The invention relates to a retarding gel adhesive for retarding bonding prestressed tendons. Background technique [0002] The slow-bonding prestressing technology is an independent and complete set of technologies created by integrating the characteristics of two systems without bonding and bonding, improving related structural types, coating materials and preparation processes, and completely breaking through the traditional prestressing concept. The system is the technical integration of multiple professional fields such as materials, structures, and machinery. It is composed of pre-stressed tendons (steel strand or steel wire bundle), slow gel adhesive and outer sheath. The slow gel adhesive is filled between the outer sheath and the pre-stressed tendons. The outer sheath is made uneven by creasing equipment. The corrugation is wrapped with the slow gel adhesive to wrap the prestressed tendons. [0003] The slow-gel adhesive material is the core of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/04C09J11/06
Inventor 吴转琴范蕴蕴尚仁杰刘景亮
Owner CHINA JINGYE ENG TECH CO LTD
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