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Method for preparing warm mixing foamed asphalt

A foamed asphalt and warm mix technology is applied in the field of preparation of warm mix foamed asphalt, which can solve the problems of low road performance and difficulty, and achieve the effects of enhancing tolerance, improving pressure resistance and increasing viscosity

Inactive Publication Date: 2017-06-23
无锡市城市道桥科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold mix asphalt mixture has the advantages of environmental protection and energy saving because it does not allow heating, but its road performance is not high, it is difficult to compare with hot mix asphalt mixture

Method used

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  • Method for preparing warm mixing foamed asphalt
  • Method for preparing warm mixing foamed asphalt
  • Method for preparing warm mixing foamed asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for warm-mix foam asphalt, comprising the following steps:

[0023] Step 1, in parts by weight, mix 40 parts of asphalt, 2 parts of surfactant, 2 parts of dimethylformamide, 1 part of bentonite, 2 parts of hypromellose and 30 parts of water at 50°C for 40 minutes , cooled to room temperature to obtain mixed asphalt 1;

[0024] Step 2, heating the mixed asphalt to 30°C, adding 0.3 parts of polyvinyl alcohol, 2 parts of calcium bicarbonate and 3 parts of absolute ethanol in parts by weight, stirring for 20 minutes, and standing for 5 hours to obtain modified emulsified asphalt;

[0025] Step 3, in parts by weight, mix 80 parts of asphalt, 3 parts of 2-acrylamide-2-methylpropanesulfonic acid and 1 part of ethylene glycol dimethacrylate, heat up to make the mixture in a fluid state, and keep it for 5 minutes. Then lower the temperature to 80°C, add 4 parts of glycerol, stir and mix for 5 minutes to obtain mixed asphalt II;

[0026] Step 4: Heat the mi...

Embodiment 2

[0029] A preparation method for warm-mix foam asphalt, comprising the following steps:

[0030] Step 1, in parts by weight, mix 43 parts of asphalt, 4 parts of surfactant, 3 parts of dimethylformamide, 2 parts of bentonite, 2.4 parts of hypromellose and 33 parts of water at 55°C for 35 minutes , cooled to room temperature to obtain mixed asphalt 1;

[0031] Step 2, heating the mixed asphalt to 35°C, adding 0.4 parts by weight of polyvinyl alcohol, 4 parts of calcium bicarbonate and 4 parts of absolute ethanol, stirring for 25 minutes, and standing for 6 hours to obtain modified emulsified asphalt;

[0032] Step 3, in parts by weight, take 90 parts of asphalt, 4 parts of 2-acrylamide-2-methylpropanesulfonic acid and 1.5 parts of ethylene glycol dimethacrylate and mix them, raise the temperature to make the mixture in a fluid state, and keep it for 8 minutes. Then lower the temperature to 85°C, add 6 parts of glycerol, and stir and mix for 8 minutes to obtain mixed asphalt II; ...

Embodiment 3

[0036] A preparation method for warm-mix foam asphalt, comprising the following steps:

[0037] Step 1, in parts by weight, mix 47 parts of asphalt, 4 parts of surfactant, 3 parts of dimethylformamide, 2 parts of bentonite, 2.8 parts of hypromellose and 38 parts of water at 57°C for 32 minutes , cooled to room temperature to obtain mixed asphalt 1;

[0038] Step 2, heating the mixed asphalt to 37°C, adding 0.4 parts by weight of polyvinyl alcohol, 4 parts of calcium bicarbonate and 5 parts of absolute ethanol, stirring for 27 minutes, and standing for 7 hours to obtain modified emulsified asphalt;

[0039] Step 3, in parts by weight, mix 95 parts of asphalt, 5 parts of 2-acrylamide-2-methylpropanesulfonic acid and 1.8 parts of ethylene glycol dimethacrylate, heat up to make the mixture in a fluid state, and keep it for 8 minutes. Then lower the temperature to 85°C, add 7 parts of glycerol, stir and mix for 8 minutes to obtain mixed asphalt II;

[0040] Step 4: Heat the mixed...

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Abstract

The invention provides a method for preparing warm mixing foamed asphalt. The method comprises the following steps: stirring and mixing asphalt, a surfactant, dimethyl formamide, bentonite, hydroxypropyl methylcellulose and water, and cooling to the room temperature so as to obtain mixed asphalt I; further heating the mixed asphalt I, adding polyvinyl alcohol, calcium bicarbonate and absolute ethyl alcohol, stirring, and leaving to stand so as to obtain modified emulsified asphalt; mixing the asphalt, 2-acrylamide-2-methylpropanesulfonic acid and ethylene glycol dimethacrylate, heating till the mixture is in a fluid state, cooling, adding glycerol, and stirring for mixing, so as to obtain mixed asphalt II; finally, heating the mixed asphalt, adding the modified emulsified asphalt in a stirring state, and keeping stirring after the modified emulsified asphalt is added, thereby obtaining the warm mixing foamed asphalt. The warm mixing foamed asphalt prepared by using the method has a relatively high expansion rate and a relatively long half-life period, and is stable in foaming state.

Description

technical field [0001] The invention belongs to the technical field of road materials, and in particular relates to a preparation method of warm-mix foam asphalt. Background technique [0002] At present, asphalt pavement is the mainstream mode of road construction in countries all over the world, and the same is true in my country. According to statistics, more than 90% of highways and urban roads that have been rebuilt, expanded or repaired in large and medium-sized cities in China have adopted asphalt pavement paved with asphalt mixture. According to the manufacturing process, asphalt mixture can be divided into two types: hot mix asphalt mixture and cold mix asphalt mixture. Hot mix asphalt mixture has good road performance, but in the production process, it will consume a lot of fuel, emit a lot of harmful gas and dust, seriously affect the environment and cause health hazards to construction workers. According to research data, it takes 8 liters of fuel to produce 1 ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L1/28C08L29/04C08K13/02C08K3/34C08K5/42C08K5/103C08K5/19C08J9/10C08J9/08
CPCC08J9/08C08J9/10C08J2395/00C08J2401/28C08J2429/04C08L95/00C08L2205/03C08L1/284C08L29/04C08K13/02C08K3/346C08K5/42C08K5/103C08K5/19Y02A30/30
Inventor 胡志军郑乐淼钱钧孙浩贡钢伟刘闯张国春吴磊
Owner 无锡市城市道桥科技有限公司
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