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A kind of epoxy asphalt concrete with high crack resistance mixed with liquid expansion agent and preparation method thereof

A technology of epoxy asphalt and liquid expansion, which is applied in the field of concrete, can solve the problems of difficult to meet the performance requirements of the mixture, damage, temperature rise, etc., and achieve the effects of reducing thermosetting properties, avoiding dust pollution, and enhancing volume expansion

Active Publication Date: 2019-12-06
江苏众科新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the temperature drops to a certain level, the epoxy asphalt material will become hard and brittle and crack, and once cracks appear, since the thermosetting epoxy asphalt cannot heat up and self-heal like other modified asphalt, it will be damaged under various loads, water Under the action of fog, fog, etc., the damage is accelerated, and a larger area of ​​disease is formed, which is difficult to meet the performance requirements of the steel bridge deck pavement in practical engineering applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] A preparation method of epoxy asphalt concrete mixed with liquid expansion agent with high crack resistance, characterized in that, the specific steps are as follows:

[0040] Step 1: Prepare epoxy asphalt

[0041]Heat the base asphalt ground by the asphalt grinder to 95-140°C, and add it to the first stirring reaction kettle, and at the same time add toughening agent, compatibilizer, and curing agent in proportion to fully mix for 20-30 minutes until the mixture is uniform ; Add the epoxy resin and diluent in proportion to the second stirring reaction kettle, heat up to 55-75°C for stirring, and mix well, then add the mixture of epoxy resin and diluent and the filler in proportion to the first stirring reaction In the kettle, under the condition of 85-130°C, keep stirring and keep warm for 45-80 minutes to obtain epoxy asphalt;

[0042] Step 2: Prepare liquid expansion agent

[0043] First weigh the expansion component and retarding component in proportion, and place...

Embodiment example 1

[0047] 1) Preparation of epoxy asphalt: heat the base asphalt (base asphalt (particle size 3mm-6mm): epoxy resin = 4:1, by mass) ground by the asphalt grinder to 100°C, and add the first stirring In the reactor, add toughening agent (polyimide), compatibilizer (sodium dodecylbenzene sulfonate), curing agent (toughening agent is 5% of epoxy resin by mass, corresponding to Compatibility agent is 2% of epoxy resin by mass, curing agent is polyamine, is 0.3% of epoxy resin by mass) fully mixes 20 minutes to mix homogeneously; Epoxy resin (epoxidized novolac Resin) and diluent (absolute ethanol) are added in the second stirring reaction kettle in proportion, be warmed up to 55 ℃ and stir, after fully mixing, epoxy resin (base bitumen: epoxy resin=4:1, by mass meter) and diluent (diluent is 5% of epoxy resin by mass) and filler (filler is silicon micropowder, 7% of epoxy resin by mass) is added in the first stirring reaction tank in proportion, Continue to stir and keep warm for 45...

Embodiment example 2

[0051] 1) Preparation of epoxy asphalt: heat the base asphalt (base asphalt (particle size 3mm-6mm): epoxy resin = 8:1, by mass) ground by the asphalt grinder to 140°C, and add the first stirring In the reactor, add toughening agent (polyimide), compatibilizer (sodium dodecylbenzene sulfonate), curing agent (toughening agent is 20% by mass of epoxy resin in proportion, corresponding to Compatibility agent is 16% of epoxy resin by mass, curing agent is polyamine, is 1.5% of epoxy resin by mass) fully mixes 30 minutes to mix homogeneously; Epoxy resin (epoxidized novolac Resin) and diluent (absolute ethanol) are added in the second stirring reaction kettle in proportion, be heated up to 75 ℃ and stir, after fully mixing, epoxy resin (base asphalt: epoxy resin=8:1, by mass meter) and diluent (diluent is 20% of epoxy resin by mass) and filler (filler is silicon micropowder, 12% of epoxy resin by mass) is added in the first stirred reaction tank in proportion, Continue to stir and...

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Abstract

The invention discloses a high anti-crack liquid expanding agent doped epoxy asphalt concrete, which comprises the following raw materials in parts by weight: 100 to 200 parts of cement, 35 to 75 parts of epoxy asphalt, 10 to 25 parts of liquid expanding agent, 240 to 480 parts of aggregate, and 150 to 300 parts of water. Epoxy asphalt is subjected to toughening modification to improve the toughness of epoxy asphalt crosslinked polymer; the thermosetting property of epoxy asphalt is weakened; silica powder is used to fill the gaps in epoxy asphalt crosslinked polymer so as to reduce the influence of low temperature on the concrete volume shrinkage; at the same time, a liquid expanding agent is added to enhance the concrete volume expanding so as to reduce concrete volume shrinkage; the anti-crack and anti-permeability performance of concrete is strengthened, compared with the powdery expanding agents, the liquid expanding agent can be more accurately measured and more evenly mixed, the dust pollution caused by powdery expanding agents is avoided at the same time, and the liquid expanding agent is environmentally friendly.

Description

technical field [0001] The invention relates to a high-crack-resistant epoxy asphalt concrete mixed with a liquid expansion agent and a preparation method thereof, belonging to the field of concrete. Background technique [0002] Epoxy asphalt refers to the multi-phase polymer polymer material formed by adding epoxy resin and curing agent to the asphalt. After curing reaction with the curing agent, the asphalt molecules are dispersed in the network structure formed by the epoxy resin to form Irreversible cured product, so thermosetting epoxy resin will not soften or flow again after being cured by pressure and heating, thus endowing asphalt with excellent physical and mechanical properties, and better high temperature stability than other thermoplastic modified asphalt sex. However, when the temperature drops to a certain level, the epoxy asphalt material will become hard and brittle and crack, and once cracks appear, since the thermosetting epoxy asphalt cannot heat up and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2111/343C04B24/36C04B14/06C04B2103/302C04B2103/308C04B24/26C04B24/18C04B18/08C04B14/02C04B24/281C04B14/062C04B2103/0068
Inventor 于迪尔曹健凌晨陈刚朱振宇刘昌财张伟季路
Owner 江苏众科新材料科技发展有限公司
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