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Foam epoxy asphalt material

A technology of epoxy asphalt material and asphalt, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems that epoxy resin cannot be cured, the use and amount are limited, and the strength cannot be improved, so as to solve the problems of short operation time, Reduce construction gas emissions, good adhesion effect

Active Publication Date: 2015-08-19
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most foamed asphalt cannot be foamed with modified asphalt such as SBS modified or rubber powder, because this type of modified asphalt has a high viscosity and little foaming effect, and foamed asphalt using only base asphalt often has insufficient strength. As a result, most of the foamed asphalt technology can only be used in base or repair projects, and its use and dosage are greatly limited.
[0005] The biggest construction drawback of epoxy asphalt used for steel bridge deck pavement is that the viscosity of the mixture rises too quickly during the process from paving to final pressure. However, the curing system in this type of epoxy asphalt is hydrophobic. During the construction process, it is necessary to strictly avoid contact with water. Directly foaming this type of epoxy asphalt will lead to problems such as the epoxy resin cannot be cured after adding it, and the waste is serious.

Method used

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  • Foam epoxy asphalt material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Component A is a mixture of my country's brand bisphenol A epoxy resin E-51 and E-54 in a ratio of 1:1; Component B consists of 61 parts by weight of asphalt, 10 parts by weight of maleic anhydride, 10 parts by weight It consists of 2-methylimidazole in parts by weight, 11 parts by weight of diacetone acrylamide and 4 parts by weight of tributyl phosphate; before mixing, component B is foamed at 143°C, and component A is heated at 80°C Keep warm for 1 hour, and the temperature of stone and mineral powder is 140°C when mixing.

[0056] The mass ratio of component A to component B is 1:3.1.

[0057] Grading screening was carried out according to Table 1.

[0058] Table 1AC-13 Mixture ratio.

[0059] particle size

[0060] The foaming machine is the Wirtgen WLB10 foaming machine used in the laboratory, the water content is 2%, the half-life of the foamed epoxy asphalt is measured to be 10s, and the expansion rate is 11 times.

Embodiment 2

[0062] The foamed epoxy asphalt material prepared by the present invention is formed by mixing two components, A and B. The A component is a Chinese brand bisphenol A type epoxy resin E-51 (single component, no other brand); the B group It consists of 73 parts by weight of pitch, 5 parts by weight of maleic anhydride, 10 parts by weight of 2-methylimidazole, 10 parts by weight of diacetone acrylamide, and 2 parts by weight of tributyl phosphate. Before mixing, component B is foamed at 143°C, component A is kept at 80°C for 1 hour, and the temperature of stone and mineral powder is 140°C during mixing.

[0063] The mass ratio of component A to component B is 1:2.8.

Embodiment 3

[0065] Ordinary base asphalt is foamed and mixed. The No. 70 base asphalt produced by SK is selected, and the asphalt index is shown in Table 2.

[0066] Table 2 Conventional indicators of base asphalt.

[0067]

[0068] The target porosity of the mixture in the three examples is the same, which is 4%. Four kinds of asphalt dosages are selected: 4.2%, 4.7%, 5.2% and 5.7%.

[0069] Table 3 Determination of asphalt consumption in the three groups of examples.

[0070] Asphalt consumption (%)

[0071] The foamed epoxy asphalt material provided by the invention can be used for paving the asphalt upper layer of roads or bridges, and can also be used for laying middle surface layers, lower layers or flexible base layers.

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Abstract

The invention discloses a foam epoxy asphalt material including epoxy resin. The weight ratio of the epoxy resin and residual components of the material ranges from 1: 1.5 to 1: 6.3; the epoxy resin is a bisphenol A type one and includes optional one or combinations of epoxy resin E-54, epoxy resin E-52, epoxy resin E-51 or epoxy resin E-44. The epoxy resin E-44 is used with other epoxy resins only, and the weight of the epoxy resin E-44 is not higher than 10% of the total weight of the epoxy resins of the material. The residual components of the material include, by weight: 30 to 84 parts of asphalt, 4 to 17 parts of maleic anhydride, 20 to 42 parts of diacetone acrylamide, 8 to 20 parts of 2-methylimidazol and 3 to 10 parts of tributyl phosphate. The material has the advantages of high adhesion, high strength, high heat resistance and long fatigue life.

Description

technical field [0001] The invention relates to an epoxy asphalt mixture material capable of foaming treatment, in particular to a foamed epoxy asphalt material. Background technique [0002] Epoxy asphalt material originated in the United States in the 1960s, and then entered China at the beginning of this century. As a steel bridge deck pavement material, it has been used in my country's Nanjing Second Yangtze River Bridge, Runyang Yangtze River Bridge, Nanjing Third Yangtze River Bridge, Hangzhou Bay Bridge, It has been used in the pavement of long-span steel bridges such as the Zhanjiang Bay Bridge. It is a pavement material with excellent performance. It has high strength, high rigidity, good toughness, fatigue resistance, water stability, and excellent chemical corrosion resistance. Etc. [0003] Most of the curing systems in epoxy asphalt currently used are acid anhydrides and modified amines, all of which are high-temperature curing systems, and the curing temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L63/02C08K5/521C08J9/00
Inventor 黄明温学钧徐健
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP