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High-temperature behavior stable modified emulsified asphalt and method for preparing the same

A high-temperature performance, emulsified asphalt technology, applied in building insulation materials, building components, construction, etc., can solve the problems of complex production process, increase the viscosity of asphalt, affect the stability of emulsion, etc., and achieve simple production process, stable high-temperature performance, high performance superior effect

Inactive Publication Date: 2009-07-29
SHANGHAI SINOFRA FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modified emulsified asphalt prepared by this method can obtain relatively good high-temperature performance, the production process is relatively complicated. The SBS modifier will increase the viscosity of the asphalt, which will bring great difficulty to the production of emulsified asphalt and affect the emulsion. stability

Method used

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  • High-temperature behavior stable modified emulsified asphalt and method for preparing the same
  • High-temperature behavior stable modified emulsified asphalt and method for preparing the same
  • High-temperature behavior stable modified emulsified asphalt and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] formula:

[0039] Based on the weight of base asphalt, the mixture of phosphorus compounds is 5%, the compound emulsifier is 0.5%, the modifier latex is 10%; ferric chloride is 0.01%;

[0040] The mixture component and weight percent of phosphorus-containing compound are:

[0041] Polyphosphoric acid 35%

[0042] Pyrophosphate 30%

[0043] Phosphoric acid 35%

[0044] The weight concentration of described polyphosphoric acid is 105% (with H 3 PO 4 remember).

[0045] Component and weight percent of described composite emulsifier are:

[0046] Cocamidopropyl Betaine 25%

[0047] Octadecylmethylammonium Chloride 10%

[0048] Water 65%

[0049] Preparation:

[0050] (1) Heating the base asphalt to 120°C, putting in a mixture of phosphorus-containing compounds, stirring and mixing to obtain phosphating modified asphalt;

[0051] (2) Put the phosphating modified asphalt at a temperature of 120° C. into the modifier latex, stir and mix to obtain the asphalt latex; ...

Embodiment 2

[0058] formula:

[0059] Based on the weight of base asphalt, the mixture of phosphorus compounds is 0.1%, the compound emulsifier is 5%, the modifier latex is 1%; polyvinyl alcohol is 2%

[0060] The mixture component and weight percent of phosphorus-containing compound are:

[0061] Polyphosphoric acid 40%

[0062] Pyrophosphate 20%

[0063] Phosphoric acid 40%

[0064] The weight concentration of described polyphosphoric acid is 105% (with H 3 PO 4 remember).

[0065] Component and weight percent of described composite emulsifier are:

[0066] Cocamidopropyl Betaine 30%

[0067] Octadecylmethylammonium Chloride 5%

[0068] Water 65%

[0069] Preparation:

[0070] (1) Heat the base asphalt to 180°C, put in the mixture of phosphorus-containing compounds, stir and mix to obtain phosphating modified asphalt;

[0071] (2) Put the phosphating modified asphalt at a temperature of 180° C. into the modifier latex, stir and mix to obtain the asphalt latex;

[0072] (3) St...

Embodiment 3

[0077] Others are the same as embodiment 1, wherein:

[0078] Stabilizer is calcium chloride; Component and weight percent of described composite emulsifier are:

[0079] Cocamidopropyl Betaine 30%

[0080] Octadecylmethylammonium Chloride 10%

[0081] water 60%

[0082] The asphalt test was carried out in accordance with the standards of the Ministry of Communications of China, "Asphalt and Asphalt Mixture Test Regulations" JTJ052-2000, and the performance indicators of the modified emulsified asphalt were measured. The results are as follows:

[0083]

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Abstract

The invention relates to stable high temperature performance modified emulsified asphalt and a preparation method thereof. Based on the weight of matrix asphalt, the mixture of phosphorus-containing compound is 0.1-5%, compound emulsifying agent is 0.5-5%, modifying agent rubber latex is 1-10%. The components and weight percentage of the mixture of the phosphorous-containing compound are: 35%-40% of polyphosphoric acid, 20%-30% of pyrophosphoric acid, and 35%-40% of phosphoric acid. The components and weight percentage of the compound emulsifying agent are: 25%-30% of CAPB, 5%-10% of octadecane DTMAC and 60%-65% of water. And the modified agent rubber latex is styrene butadiene latex. Compared with the prior art, the modified emulsified asphalt prepared by the invention has the following prominent advantages that the softening point of evaporated residue of the modified emulsified asphalt is high; the modified emulsified asphalt has stable high temperature performance, simple processing technique, convenient operation, and high performance and is applicable to the micro-surface treatment of the slurry seal.

Description

technical field [0001] The invention relates to a modified emulsified asphalt and a preparation method thereof. Background technique [0002] The slurry seal and micro-surfacing technology with emulsified asphalt as the binder has many advantages such as wide application range, convenient construction, energy saving, pollution reduction, and extended construction period. However, due to the low softening point of evaporation residue of single emulsified asphalt and SBR latex modified asphalt, the high temperature stability is not ideal, which restricts the promotion of slurry seal technology. [0003] In order to increase the softening point of the modified emulsified asphalt evaporation residue and improve its high temperature performance, domestic and foreign scientists have done a lot of work. Chinese patent (CN1793234A) discloses a kind of preparation method of SBS modified emulsified asphalt, adds SBS modifier in base asphalt, stirs 20min, puts into Sasobit high-speed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08J3/03C08K5/20C08L9/08C08K3/32
Inventor 郑善强宋林
Owner SHANGHAI SINOFRA FINE CHEM
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