Warm mix flame-retardant modified asphalt and preparation method thereof

Abstract

The invention discloses a warm mix flame-retardant modified asphalt and a preparation method thereof. The method comprises the following steps of: heating polymer modified asphalt to the temperature of between 100 and 120 DEG C into a melting state, stirring to dehydrate the asphalt, and heating and maintaining the polymer modified asphalt at the temperature of between 140 and 150 DEG C; adding warm mix flame-retardant modifiers into the polymer modified asphalt, adding with stirring, wherein the adding order is an organic viscosity reducer, a decabromodiphenyl oxide, an antimonous oxide, a hydrated magnesium silicate and a smoke-suppressing flame-retardant assistant in turn, and stirring for about 30 to 40 minutes, wherein in the process of adding and stirring, the temperature of the polymer modified asphalt is controlled between 140 and 150 DEG C; and finally, obtaining the warm mix flame-retardant modified asphalt. The warm mix flame-retardant modified asphalt can reduce the construction temperature of asphalt concrete, reduce the production energy consumption, save the production cost, reduce the smoke emissions in the construction of the asphalt concrete, and improve the construction environments, and has higher flame retardance and smoke suppression performance.

Description

technical field [0001] The invention relates to a modified asphalt, in particular to a warm-mix flame-retardant modified asphalt. [0002] The invention also relates to a preparation method of the warm-mix flame-retardant modified asphalt. Background technique [0003] With the development of my country's economy in recent years and the improvement of my country's large-scale road construction technology, people have gradually realized that there are joints in the cement concrete road surface, and the surface is uneven, causing bumpy driving, poor comfort, long construction period, and difficult maintenance. Poor wear resistance and poor surface skid resistance cause traffic accidents in the tunnel. It is measured that the cement concrete pavement in the tunnel is in a wet state, and its friction coefficient is only 40% of the dry state, which is 25% of the asphalt concrete; because the tunnel is relatively closed The tubular structure, the noise inside the tunnel is higher t...

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Problems solved by technology

[0003] With the development of my country's economy in recent years and the improvement of my country's large-scale road construction technology, people have gradually realized that there are joints in the cement concrete road surface, and the surface is uneven, causing bumpy driving, poor comfort, long construction period, and difficult maintenance. Poor wear resistance and poor surface skid resistance cause traffic accidents in the tunnel. It is measured that the cement concrete pavement in the tunnel is in a wet state, and its friction coefficient is only 40% of the dry state, which is 25% of the asphalt concrete; because the tunnel is relatively closed The tubular structure, the noise inside the tunnel is higher than the noise outside the tunnel, and the noise resonates and superimposes in the tunnel, which makes the noise inside the tunnel louder, lasts longer, is not easy to dissipate, and affects the traffic environment

In addition, tunnel fires are much more destructive than ordinary building fires. Once a fire occurs, the temperature rises suddenly in a short period of time, which can not only ignite the ordinary asphalt pavement and wall decoration inside the tunnel, but also produce a large amount of toxic smoke and reduce the visibility of the tunnel. , and damage the waterproof system of the tunnel, resulting in different degrees of water seepage and leakage in the tunnel, completely causing huge damage to the lining, resulting in a reduction or complete loss of the bearing capacity of the structure, making it difficult for victims to escape and rescue work to be carried out, resulting in large-scale personnel. casualties and property damage

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