Two-stage warm-mix rubber asphalt method and its products
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A rubber asphalt, two-stage technology, applied in the field of rubber asphalt, can solve the problems of no energy saving and emission reduction, and achieve the effects of energy saving, environmental pollution reduction and low reaction temperature
Active Publication Date: 2016-07-13
北京嘉格伟业筑路科技有限公司 +2
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Problems solved by technology
However, the existing methods basically follow the technical idea of "WMA". By adding surfactants in the production process of the mixture, the production temperature of the mixture is reduced by about 30°C, and the production process of rubber asphalt itself does not have any energy saving and reduction. Row
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Embodiment 1
[0036] Embodiment 1: see figure 1 , a two-stage warm-mix rubber asphalt method provided in this embodiment is characterized in that it comprises the following steps:
[0037] (1) Preparing raw materials: each component and weight percentage of raw materials are as follows:
[0038] Base asphalt 75-80%,
[0039] Waste tire rubber powder 16-20%,
[0040] Reduce line oil by 1 to 3%,
[0041] RH asphalt warm mix modifier 1~3%;
[0042] (2) Heating and mixing: heat the base asphalt to above 190°C, then add waste tire rubber powder to the base asphalt, and stir evenly to obtain a rubber asphalt mixture;
[0043] (3) The first-stage reaction: adding the rubber asphalt mixture to the reactor, then adding the line-reducing oil into the reactor, and heating and stirring at 170-180° C.; the step (3) specifically includes the following steps: ( 3.1) After adding the rubber asphalt mixture to the reactor, immediately add the line oil into the reactor, and keep the reactor at 170-180°C...
Embodiment 2
[0051] Example 2, the two-stage warm-mix rubber asphalt method and its products provided in this example, its components and production steps are basically the same as in Example 1, the difference is that the components of the raw materials and their weight percentages are as follows :
[0052] Base bitumen 78%,
[0053] Waste tire rubber powder 18%,
[0054] Minus line oil 3%,
[0055] RH asphalt warm mix modifier 1%.
Embodiment 3
[0056] Example 3, the two-stage warm-mix rubber asphalt method and its products provided in this example, its components and production steps are basically the same as in Example 1, the difference is that the components of the raw materials and their weight percentages are as follows :
[0057] Base bitumen 80%,
[0058] Waste tire rubber powder 16%,
[0059] Minus line oil 1%,
[0060] RH asphalt warm mix modifier 3%.
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Abstract
The present invention discloses a two-stage type rubber asphalt warm mix method, which comprises: 1) preparing raw material; 2) carrying out heating mixing; 3) adding an oil produced from a crude oil vacuum distillation tower, and carrying out a first stage reaction; and 4) adding a RH asphalt warm mix modifier to carry out a second stage reaction, and carrying out a viscosity reduction treatment. The invention further discloses a product prepared by performing the preparation method. According to the present invention, the method has characteristics of simple process, easy achievement and high efficiency; under the premise of assurance of the road performance, the two auxiliary agents are adopted to modify the rubber asphalt at two stages so as to effectively reduce the reaction temperature of the rubber asphalt, reduce the fuel consumption, reduce the emissions of harmful gases and dust, reduce the environmental pollution and improve the construction environment; and the product provided by the present invention has characteristics of low viscosity, low reaction temperature, asphalt pavement construction season prolonging, asphalt mixing material aging reducing, road performance improving, effective reduction of fuel energy consumption required by the mixing material production process, energy source saving and mixing cost reducing.
Description
technical field [0001] The invention belongs to the technical field of rubber asphalt, and in particular relates to a two-stage warm-mix rubber asphalt method and products obtained by implementing the method. Background technique [0002] For a long time, the production of road asphalt mixture has generally adopted the method of high temperature mixing, that is, the so-called "hot mix mixture" (HMA). This process consumes a lot of fuel and has a lot of smoke and dust, which seriously pollutes the air. After 2000, my country introduced the warm mix technology (WMA) of asphalt mixture from abroad. By adding special surfactant materials in the production process of asphalt mixture, this technology can greatly reduce the production temperature of asphalt mixture, which can reach more than 40°C, thereby greatly reducing fuel consumption and exhaust emissions, and has been widely used. [0003] Rubber asphalt is a modified asphalt produced by processing waste tires into rubber po...
Claims
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