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Sulphur-modified asphalt mixed materials formulation and its construction process

A technology of asphalt mixture and modified asphalt, which is applied in building insulation materials, building components, buildings, etc., to achieve the effects of improved water damage resistance, strong adhesion, and enhanced performance

Pending Publication Date: 2005-11-02
BEIJING RIONLON ASPHALT TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Despite the above technical basis, in order to ensure the production of qualified mixtures that can reflect the technological superiority of sulfur modified asphalt, a reasonable and optimal proportion design and strict guidance on process operation specifications are still required

Method used

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  • Sulphur-modified asphalt mixed materials formulation and its construction process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Modified pellets / asphalt = 50 / 50 obtains a very hard "full rigid" mixture, which replaces about 40% of asphalt by volume. This surface layer has excellent anti-rutting performance, but its flexibility is very low, so it can only be used when the roadbed is very good and the pavement structure is very rigid. This kind of mixture hardens earlier and must be operated quickly, and the final pressing temperature should not be lower than 110°C. The desired compacted density is rapidly achieved at elevated temperatures. In addition, the smog emitted by the mixture of this proportion is also relatively large.

Embodiment 2

[0042] Modified pellets / bitumen = 40 / 60 resulted in a "semi-rigid" mix that replaced about 30% of the bitumen. The stability of this mixture is higher than that of conventional asphalt mixture, so the pavement has high anti-rutting performance, while maintaining sufficient flexibility and good fatigue resistance. The mixing temperature is controlled at about 140°C, and paving and compaction can be carried out according to conventional techniques. It can be applied to the needs of general roads and is widely used.

Embodiment 3

[0044] Mix / asphalt = 30 / 70 gives a "flexible" mix that replaces about 20% of the asphalt. The performance of this mixture is basically similar to that of conventional asphalt mixture, but its stability is slightly better, and all the processes are the same as conventional ones.

[0045] What kind of ratio to use should be selected according to the functional needs of the road and the strength and stiffness of the road surface design.

[0046] Selection of asphalt mixture

[0047] Sulfur can be compatible with all asphalts, but the effects are different. Different asphalts and different ratios can obtain different properties of the mixture. Using softer asphalt, the effect is more obvious. In Tianjin area, AH90 asphalt is used at a ratio of 40 / 60, and the effect achieved is similar to that of SBS modified asphalt. If using softer asphalt, in order to achieve the above effect, it is necessary to increase the proportion of modified particles. Therefore, the appropriate ratio ...

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Abstract

A sulfur modified bituminous mixture, used for asphalt covering, the dispense of which is: sulfur 50-99.99 percent, carbon 0-49 percent, smoke inhibitor 0.01-1 percent and elasticizer 0-3 percent; the work craft of which is : the mixing temperature is not higher than 150 Deg.C and rolling temperature is not lower than 90 Deg.C. Such invention can effectively reduce the harmful gas during working process, so the pavement quality can be improved dramatically.

Description

Technical field: [0001] The invention relates to a production process of road modified asphalt material. Background technique: [0002] In order to meet the ever-increasing needs of road traffic, improve the design and construction quality of the road surface, especially the quality of the asphalt surface layer, so that it can meet the requirements of bearing capacity, durability, comfort, and safety within the design period, road scientific and technological personnel work in A lot of research has been done on the surface layer binder, various formulations of modified asphalt have been widely used, and some new modification methods are also being studied continuously. As early as a century ago, people knew that sulfur has the characteristics of improving the quality of asphalt. Sulfur modification was widely used in the United States and Canada in the 1970s, but it was the first application in my country. It is a new material and new process, and users ...

Claims

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Application Information

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IPC IPC(8): C08L95/00
Inventor 张庆新张珑瑛
Owner BEIJING RIONLON ASPHALT TECH DEV
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