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Warm mixed asphalt and preparation method thereof

A technology of warm-mixed asphalt and base asphalt, which is applied in building insulation materials, building components, climate change adaptation, etc. It can solve problems such as inferior chemical plasticization, lack of test methods and example data support, immaturity, etc.

Active Publication Date: 2012-01-18
浙江宝盈爱思开新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research in this area is still immature. For example, Chinese patent CN 1690126A mentions a sulfur-modified asphalt mixture formula and process. Carbon, plasticizer and smoke suppression are used in the preparation of sulfur-reinforced asphalt modified particles. agent
Although the addition of plasticizer n-butanol can increase the compatibility of sulfur and asphalt, the two are mainly physical effects, not as good as chemical plasticization
In addition, it is mentioned in the patent that it can effectively reduce harmful gases in construction, but it lacks relevant test methods and example data support, and further work is needed to prove

Method used

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  • Warm mixed asphalt and preparation method thereof
  • Warm mixed asphalt and preparation method thereof
  • Warm mixed asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] After the plasticized sulfur warm mix asphalt is prepared, it is necessary to evaluate the volatility of the undesired gases in the formulation of this example. The implementation method is as follows:

[0049] (1) Seal the asphalt sample to be tested and place it in an oven at 135°C.

[0050] (2) After the sample has been kept at constant temperature for a period of time, it is taken out and quickly placed in the annular partition. The annular partition is located in a fume hood with a steady updraft, and the ambient temperature is kept constant at 23 °C.

[0051] (3)H 2 The S detector is placed at a certain height directly above the asphalt sample, the sealing cover of the asphalt sample is opened, and the H 2 The gas concentration of S, and then record the concentration value every time the sample temperature drops by 5°C until the detected concentration approaches zero.

[0052] (4) with H 2 S concentration / temperature as coordinates, draw H 2 The curve of the...

Embodiment 1

[0055] 100 parts of elemental sulfur, 20 parts of dicyclopentadiene and 5 parts of pyridine were mixed and stirred at 130° C. for 3 hours. Then at 135°C, add 20 parts of the prepared plasticized sulfur to 100 parts of general-purpose petroleum-based asphalt (base asphalt) with a penetration of 68dmm at 25°C, add 1 part of calcium oxide and 0.1 part of amyl acetate in sequence, and stir for 0.5 hours to get the product.

Embodiment 2

[0057] 100 parts of elemental sulfur and 20 parts of liquid polyolefin polysulfide (Mw≈4000) were mixed and stirred at 130° C. for 1.5 hours. Then at 135°C, add 20 parts of the prepared plasticized sulfur to 100 parts of general-purpose petroleum-based asphalt (base asphalt) with a penetration of 68dmm at 25°C, add 0.05 parts of hydrogen peroxide, 0.02 parts of 1,6-hexane Dithiol was stirred for 1 hour to obtain the product.

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Abstract

The invention provides warm mixed asphalt and a preparation method thereof. The warm mixed asphalt provided by the invention is composed of matrix asphalt, plasticized sulfur, an odor removing agent, and a fragrance enhancing agent. The warm mixed asphalt is prepared from components of, by weight: 100 parts of matrix asphalt, 10 to 35 parts of plasticized sulfur, 0.05 to 1 part of the odor removing agent, and 0.02 to 0.5 parts of the fragrance enhancing agent. The plasticized sulfur comprises components of, by weight: 100 parts of elementary sulfur and 5 to 25 parts of a plasticizing agent. With the warm mixed asphalt provided by the invention, influences on human bodies and environmental pollution caused by harmful gases discharged during a sulfur asphalt construction process can be effectively reduced. The asphalt can be warm-mixed with aggregate under a temperature below 135 DEG C, such that energy consumption is reduced.

Description

technical field [0001] The invention relates to an asphalt composition and a preparation method thereof, in particular to warm-mix asphalt and a preparation method thereof. Background technique [0002] In the past ten years, in order to prevent air pollution caused by excessive sulfur emissions in petrochemical products, environmental protection standards have become increasingly stringent. In order to meet the standards, various petroleum refining and chemical companies have continuously improved the desulfurization process, and a large amount of sulfur is produced as a by-product. In addition, the application of liquefied natural gas is also booming. Since the catalyst used is susceptible to sulfur poisoning and loses its effectiveness, it is necessary to desulfurize the natural gas before liquefaction, resulting in a further increase in sulfur emissions. The application fields of traditional sulfur are generally in fertilizers, pharmaceuticals and chemical raw materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L81/04C08G75/14
CPCY02A30/30
Inventor 程明金佑成车淳万
Owner 浙江宝盈爱思开新材料科技有限公司
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