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Modified epoxy resin composite for strengthening concrete pole

A technology of epoxy resin and composite materials, which is applied in the direction of buildings, towers, building types, etc., can solve the problem of tensile effect, insufficient weather resistance, unsatisfactory composite effect of resin and carbon fiber, impact resistance, peeling resistance and vibration fatigue resistance Poor and other problems, to achieve the effect of increasing self-weight and cross-sectional size, light self-weight, and easy to cause micro-cracks

Inactive Publication Date: 2010-10-27
HUAIBEI KEAO ENG CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, simple epoxy resin and carbon fiber are mostly used for compounding. Although epoxy resin itself is a thermosetting resin, although it has good heat resistance, high strength and good adhesion to the substrate, it is also brittle, The problems of poor impact resistance, peeling resistance and vibration fatigue resistance make the composite effect of resin and carbon fiber unsatisfactory. In addition, due to the limitation of construction conditions, the tensile effect and weather resistance after reinforcement are not stable enough; so carbon fiber / epoxy resin composite is used Materials to strengthen cement poles are still in urgent need of improvement from the preparation of composite materials to the specific construction methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, carry out carboxylation pretreatment on carbon nanotubes, put them into a mixed acid with a volume ratio of sulfuric acid (65-75% mass fraction) / nitric acid (50-60% mass fraction) of 3:1, and heat to 65-75°C Stir, react for 1 hour, then filter statically, wash the carbon nanotubes repeatedly with deionized water until neutral, and dry them for later use.

[0022] First add 1 part of treated carbon nanotubes to 100 parts of epoxy resin, continue to add 5 parts of nano-silica, and continue vigorously stirring for 12 hours until uniformly mixed to prepare a modified epoxy resin material for use.

[0023] For the reinforcement of the pole, firstly, the surface of the pole is treated, and the parts with cracks and missing corners are polished with an angle grinder to clean up the oil, dust and unevenness on the surface until it is flat and clean. If the crack width is less than 0.2mm, use epoxy resin glue to brush and seal the surface, and the cracks larger than 0.2mm...

Embodiment 2

[0025] First carry out carboxylation pretreatment on carbon nanotubes, put them into a mixed acid with a volume ratio of sulfuric acid (70% mass fraction) / nitric acid (55% mass fraction) of 3:1, heat at 70°C and stir, react for 1 hour and then filter statically , the carbon nanotubes were repeatedly washed with deionized water until neutral, and dried for later use.

[0026] First add 1.2 parts of treated carbon nanotubes to 100 parts of epoxy resin, continue to add 6 parts of nano-silicon dioxide, and continue vigorously stirring for 12 hours until the mixture is uniform to prepare a modified epoxy resin material for use.

[0027] For the reinforcement of the pole, firstly, the surface of the pole is treated, and the parts with cracks and missing corners are polished with an angle grinder to clean up the oil, dust and unevenness on the surface until it is flat and clean. If the crack width is less than 0.2mm, use epoxy resin glue to brush and seal the surface, and the cracks ...

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PUM

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Abstract

The invention discloses a modified epoxy resin composite for strengthening a concrete pole, which comprises carbon cloth and epoxy resin. The modified epoxy resin composite for strengthening the concrete pole is characterized in that: the carbon cloth is impregnated with the modified epoxy resin; the modified epoxy resin refers to 100 parts of the epoxy resin comprising 0.8 to 2 parts of surface-finished carbon nanotubes and 3 to 8 parts of nano silica; and carbon nanotubes are oxidized by the mixed acid of HNO3 and H2SO4 to carboxylate the surfaces of the carbon nanotubes to form the surface-finished carbon nanotubes. 30 to 60 parts of curing agent is added into the modified epoxy resin during construction and material mixing. The composite has the characteristics of high weather resistance, tensile property, high strength, impact resistance, corrosion resistance and the like and is a good material for strengthening the pole.

Description

1. Technical field [0001] The invention relates to an epoxy resin composite material, in particular to a modified epoxy resin composite material for cement pole reinforcement. 2. Background technology [0002] Most of the existing transmission and distribution power lines are erected with concrete poles (cement poles). After many years of ups and downs, the open air in severe winters and some poles have been operating in the subsidence area all year round. Many cement poles have horizontal cracks and vertical cracks, and the concrete on the poles is partially broken, which directly threatens the safe power supply and normal operation of production and life. If the strategy of replacing poles is adopted, the power outage will be long and the construction will be more difficult, because some poles are in the courtyards of rural residents, which are easy to dismantle and difficult to replace, and a large amount of young crops must be paid to the village and households Compensa...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K13/06C08K9/02C08K7/00C08K3/04C08K7/06C08K3/36E04H12/12
Inventor 秦小坤杨振兴陈玲
Owner HUAIBEI KEAO ENG CONSTR
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