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Preparation method of foamed asphalt warm mix concrete

A technology of foamed asphalt and concrete, which is applied in the field of engineering, can solve the problems of affecting the surrounding environment and the health of construction personnel, reducing the long-term pavement performance of asphalt concrete, reducing the service life of roads, etc., achieving the extension of daily construction time and compaction time , the effect of increasing the service life

Active Publication Date: 2017-03-29
南京诚开集约建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the road construction materials in our country are still dominated by hot-mix asphalt concrete. Hot-mix asphalt concrete requires high temperature during mixing, paving and rolling, and high-temperature mixing and other construction conditions tend to accelerate the aging of asphalt , in severe cases, the asphalt concrete after construction is equivalent to the aging state of five years, which seriously reduces the long-term pavement performance of asphalt concrete, thereby reducing the service life of the road
In addition, when the hot-mix asphalt concrete is unloaded, there is a serious sticky phenomenon at the bottom of the material truck. At the same time, the production process and construction process of hot-mix asphalt concrete will consume a lot of energy, and also emit a lot of harmful gases and dust, affecting The surrounding environment and the health of construction workers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Put the asphalt into the heating storage tank and heat it to 170°C to obtain high-temperature asphalt.

[0018] (2) the high-temperature asphalt of step (1) is contained in the asphalt foaming device, the temperature of setting asphalt foaming device is 150 ℃, adds the cold water of 1.5 parts by weight in the asphalt foaming device by high-pressure pump, the high-pressure pump The pressure is 4Kpa, feed gas into the asphalt foaming device, set the air pressure to 0.8Kpa, start the asphalt foaming device, high-temperature asphalt, water and gas are rapidly vaporized in the asphalt foaming device, and rapidly expand to form foamed asphalt;

[0019] (3) Prepare new mineral material and heat the new mineral material to 130°C;

[0020] (4) Prepare the old material RAP (recycled asphalt pavement material), and heat the old material RAP to 110°C;

[0021] (5) The new mineral material that step (3) obtains and the old material RAP that step (4) obtains are joined in the mi...

Embodiment 2

[0023] (1) Put the asphalt into the heating storage tank and heat it to 160°C to obtain high-temperature asphalt.

[0024] (2) the high-temperature bitumen of step (1) is contained in the asphalt foaming device, the temperature of setting the asphalt foaming device is 170 ℃, adds 2 parts by weight of cold water in the asphalt foaming device by the high-pressure pump, the high-pressure pump The pressure is 4Kpa, feed gas into the asphalt foaming device, set the air pressure to 0.8Kpa, start the asphalt foaming device, high-temperature asphalt, water and gas are rapidly vaporized in the asphalt foaming device, and rapidly expand to form foamed asphalt;

[0025] (3) Prepare new mineral material and heat the new mineral material to 120°C;

[0026] (4) Prepare the old material RAP (recycled asphalt pavement material), and heat the old material RAP to 120°C;

[0027] (5) The new mineral material that step (3) obtains and the old material RAP that step (4) obtains are joined in the ...

Embodiment 3

[0029] (1) Put the asphalt into the heating storage tank and heat it to 150°C to obtain high-temperature asphalt.

[0030] (2) the high-temperature bitumen of step (1) is contained in the asphalt foaming device, the temperature of setting the asphalt foaming device is 150 ℃, adds 2 parts by weight of cold water in the asphalt foaming device by the high-pressure pump, the high-pressure pump The pressure is 4Kpa, feed gas into the asphalt foaming device, set the air pressure to 0.8Kpa, start the asphalt foaming device, high-temperature asphalt, water and gas are rapidly vaporized in the asphalt foaming device, and rapidly expand to form foamed asphalt;

[0031] (3) Prepare new mineral material and heat the new mineral material to 130°C;

[0032] (4) Prepare the old material RAP (recycled asphalt pavement material), and heat the old material RAP to 120°C;

[0033] (5) The new mineral material that step (3) obtains and the old material RAP that step (4) obtains are joined in the ...

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Abstract

The invention discloses a preparation method of foamed asphalt warm-mixed concrete. The preparation method of the foamed asphalt warm-mixed concrete is characterized by comprising the following steps that 1, high-temperature asphalt is prepared; 2, foamed asphalt is prepared; 3 new mineral aggregate is prepared and heated to the temperature ranging from 120 DEG C to 130 DEG C; 4, reclaimed asphalt pavement (RAP) is prepared and heated to the temperature ranging from 110 DEG C to 120 DEG C; 5, mixing is conducted, the new mineral aggregate obtained in the third step and the RAP obtained in the fourth step are simultaneously added into a mixing vat for dry mixing, and the foamed asphalt obtained in the second step is added for wet mixing, so that the foamed asphalt warm-mixed concrete is obtained. The preparation method of the foamed asphalt warm-mixed concrete has the advantages that due to the fact that the high-temperature asphalt, air and water simultaneously enter an asphalt foamer for rapid vaporization, the foamed asphalt is formed through rapid expansion, the size of the formed asphalt is increased temporarily, the viscosity is decreased, the aggregate can be fully wrapped with the formed asphalt at lower temperature, and the workability of the foamed asphalt is improved.

Description

technical field [0001] The invention belongs to the technical field of engineering, and in particular relates to a method for preparing foamed asphalt warm-mix concrete. Background technique [0002] With the increasing development of my country's transportation industry, the requirements for the service life of roads are also increasing. At present, the road construction materials in our country are still dominated by hot-mix asphalt concrete. Hot-mix asphalt concrete requires high temperature during mixing, paving and rolling, and high-temperature mixing and other construction conditions tend to accelerate the aging of asphalt In severe cases, the asphalt concrete after construction is equivalent to the aging state of five years, which seriously reduces the long-term pavement performance of asphalt concrete, thereby reducing the service life of the road. In addition, when the hot-mix asphalt concrete is unloaded, there is a serious sticky phenomenon at the bottom of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B26/26
CPCY02A30/30
Inventor 陈贤
Owner 南京诚开集约建材科技有限公司
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