Fire-retardant warm-mixed asphalt additive

A technology for warm mix asphalt and additives, which is applied in the field of road asphalt materials, can solve the problems of unfavorable quality control by manual feeding method, cumbersome metering and sub-packaging process, and small amount of single additive, and achieves low production cost, good high temperature stability and high temperature stability. Effects of water damage resistance, simple preparation method

Active Publication Date: 2013-08-28
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the warm mix agent and the flame retardant are different products, they must be packaged separately during production, so that the dosage of each additive is small, and it is not easy to use mechanical delivery, which not only makes the metering and packaging process cumbersome, but also requires manual delivery. It is also not conducive to quality control, and it is prone to problems such as missed and under-invested

Method used

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  • Fire-retardant warm-mixed asphalt additive
  • Fire-retardant warm-mixed asphalt additive
  • Fire-retardant warm-mixed asphalt additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The flame retardant warm mix asphalt additive in this example is made by mixing and ball milling the following raw materials in parts by weight: 23 parts of sodium aluminosilicate, 21 parts of ammonium polyphosphate, 6 parts of melamine, 2 parts of pentaerythritol, 14 parts of diatomaceous earth, dry powder interface 0.4 parts of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 400r / min, and the time of the ball milling is 36min.

Embodiment 2

[0021] The flame-retardant warm-mix asphalt additive in this example is made by mixing and ball-milling the following raw materials in parts by weight: 24 parts of sodium aluminosilicate, 22 parts of ammonium polyphosphate, 5 parts of melamine, 3 parts of pentaerythritol, 15 parts of diatomaceous earth, dry powder interface 0.5 parts of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 350r / min, and the time of the ball milling is 43min.

Embodiment 3

[0023] The flame retardant warm mix asphalt additive in this example is made by mixing and ball milling the following raw materials in parts by weight: 26 parts of sodium aluminosilicate, 23 parts of ammonium polyphosphate, 8 parts of melamine, 4 parts of pentaerythritol, 16 parts of diatomaceous earth, dry powder interface 0.6 part of agent; preferably, the dry powder interface agent is redispersible latex powder, the speed of the ball milling is 500r / min, and the time of the ball milling is 30min.

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Abstract

The invention provides a fire-retardant warm-mixed asphalt additive which is formed by mixing and carrying out ball-milling on the following raw materials in parts by weight: 21-26 parts of sodium silicoaluminate, 20-23 parts of ammonium polyphosphate, 4-8 parts of melamine, 1-4 parts of pentaerythritol, 13-16 parts of diatomite and 0.3-0.6 part of a dry powder interfacial agent. According to the fire-retardant warm-mixed asphalt additive, the limited oxygen index of an asphalt mixture can achieve more than 25 percent, the mixing and compacting temperature of the asphalt mixture can be reduced by more than 20 DEG C under the premise that the performance of the asphalt mixture is not influenced, and the fire-retardant warm-mixed asphalt additive can be widely applied to asphalt mixture construction in various climates of regions.

Description

technical field [0001] The invention belongs to the technical field of road asphalt materials, and in particular relates to a flame-retardant warm-mix asphalt additive. Background technique [0002] Compared with cement concrete pavement materials, asphalt pavement materials have the characteristics of comfortable driving, low noise, good skid resistance, and high traffic safety. However, due to the flammability of asphalt, there are certain fire safety hazards in tunnel engineering, especially in large road tunnels, and the traditional hot mix asphalt mixture will generate a large amount of fire due to the high temperature of the asphalt mixture during construction. The harmful gas and dust in the tunnel will seriously affect the construction environment in the tunnel and the health of construction workers. [0003] In view of the above problems, engineers and technicians began to consider using warm mixing and flame retardant technology for the construction of tunnel asph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B22/16
CPCY02A30/30
Inventor 郝培文王春兰翔徐金枝
Owner CHANGAN UNIV
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