Manufacturing process of acid aggregate modified anti-seepage asphalt concrete

Abstract

The invention discloses a manufacturing process of acid aggregate modified anti-seepage asphalt concrete, the acid aggregate modified anti-seepage asphalt concrete comprises the following components: 7%-7.8% of asphalt, 55%-70% of acid aggregate, 6%-8% of mineral powder, an anti-stripping agent accounting for 0.5%-1.8% of the weight of the asphalt, and the balance of water, the acid aggregate is cobblestone and gneiss, the coarse aggregate in the acid aggregate is 13-16mm gneiss, and the fine aggregate is 1.8-2.2 mm cobblestone. Asphalt concrete is prepared from the acid aggregate, the acid aggregate is modified in a high-temperature roasting mode, the adhesivity with asphalt is improved, the anti-seepage performance and durability of the asphalt concrete are improved, and the service life of a road is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of concrete anti-seepage materials, and particularly relates to a manufacturing process of acid-aggregate modified anti-seepage asphalt concrete. Background Art

[0002] With the continuous development of the transportation industry, road construction has become an important infrastructure for promoting social and economic development. However, traditional asphalt concrete pavements have problems such as easy water seepage and poor durability, seriously affecting the service life of roads. Combining with the hydraulic concrete in current water conservancy projects, most of them use alkaline aggregates, which can have good adhesion with asphalt, but the anti-seepage performance is poor. It is known that the anti-seepage performance of acid aggregates is better than that of alkaline aggregates. For asphalt concrete pavements, using alkaline aggregates is also prone to cracking. Therefore, it is necessary to improve the existing asphalt concrete ingredients. Summary of the Invention

[0003] In view of the above deficiencies of the prior art, the purpose of the present invention is to provide a manufacturing process of acid-aggregate modified anti-seepage asphalt concrete.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: The present invention is a manufacturing process of acid-aggregate modified anti-seepage asphalt concrete, which comprises the following components: 7%-7.8% of asphalt, 55%-70% of acid aggregates, 6%-8% of mineral powder, 0.5%-1.8% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acid aggregates are river pebbles and gneisses.

[0005] In the acid aggregates of the present invention, the coarse aggregates are gneisses with a particle size of 13-16 mm, and the fine aggregates are river pebbles with a particle size of 1.8-2.2 mm.

[0006] The mass ratio of the coarse aggregates to the fine aggregates of the present invention is 3 / 7.

[0007] A manufacturing process of acid-aggregate modified anti-seepage asphalt concrete of the present invention is mainly made up of the following steps: (1) Clean the dust and impurities on the surface of the acid aggregates, screen the acid aggregates to appropriate particle sizes according to the ratio, and then pre-heat them in a drying oven at 180 °C for 120 min. (2) Put the pre-heated coarse aggregates and fine aggregates into different crucibles respectively. The coarse aggregates are subjected to high-temperature roasting at 800-900 °C, and the fine aggregates are subjected to high-temperature roasting at 900-1100 °C.

[0008] (3) After the high-temperature roasted coarse aggregates and fine aggregates are cooled to 300-400 °C, they are mixed in a mixing plant, and mineral powder is added and stirred evenly.

[0009] (4) Heat the asphalt to 180 - 200 °C according to the ratio, add the anti-stripping agent, stir evenly, and then transfer it to the mixing plant to mix evenly with the acidic aggregate.

[0010] The beneficial effects of the present invention are as follows: Acidic aggregates are used to prepare asphalt concrete. The coarse aggregates and fine aggregates are modified by high-temperature roasting to increase the adhesion with asphalt, improve the anti-seepage performance and durability of asphalt concrete, and extend the service life of the road. Specific embodiments

[0011] The present invention relates to a manufacturing process of acid-aggregate modified anti-seepage asphalt concrete, which comprises the following components: 7% - 7.8% of asphalt, 55% - 70% of acidic aggregate, 6% - 8% of mineral powder, 0.5% - 1.8% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acidic aggregate is river pebble and gneiss. Among them, the coarse aggregate in the acidic aggregate is gneiss with a size of 13 - 16 mm, and the fine aggregate is river pebble with a size of 1.8 - 2.2 mm. The mass ratio of the coarse aggregate to the fine aggregate is 3 / 7. Examples

[0012] A manufacturing process of acid-aggregate modified anti-seepage asphalt concrete, which comprises the following components: 7% of asphalt, 70% of acidic aggregate, 6% of mineral powder, 1.8% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acidic aggregate is river pebble and gneiss. Among them, the coarse aggregate in the acidic aggregate is gneiss with a size of 16 mm, and the fine aggregate is river pebble with a size of 1.8 mm. Examples

[0013] A manufacturing process of acid-aggregate modified anti-seepage asphalt concrete, which comprises the following components: 7.8% of asphalt, 63% of acidic aggregate, 6% of mineral powder, 1.2% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acidic aggregate is river pebble and gneiss. Among them, the coarse aggregate in the acidic aggregate is gneiss with a size of 13 mm, and the fine aggregate is river pebble with a size of 2.2 mm. Examples

[0014] A manufacturing process of acid-aggregate modified anti-seepage asphalt concrete, which comprises the following components: 7.4% of asphalt, 55% of acidic aggregate, 8% of mineral powder, 0.5% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acidic aggregate is river pebble and gneiss. Among them, the coarse aggregate in the acidic aggregate is gneiss with a size of 14 mm, and the fine aggregate is river pebble with a size of 2 mm. Examples

[0015] A manufacturing process of acid aggregate modified anti-seepage asphalt concrete, comprising the following components: asphalt 7.6%, acid aggregate 60%, mineral powder 7%, anti-stripping agent 0.8% of the weight of asphalt, and the balance is water. The acid aggregate is river pebble and gneiss. Among them, the coarse aggregate in the acid aggregate is 15 mm gneiss, and the fine aggregate is 2.2 mm river pebble.

[0016] A manufacturing process of acid aggregate modified anti-seepage asphalt concrete is mainly made by the following steps: (1) Clean the dust and impurities on the surface of the acid aggregate, screen the acid aggregate to a suitable particle size according to the ratio, and then pre-heat it. Heat it in an oven at 180 °C for 120 min. (2) Put the pre-heated coarse aggregate and fine aggregate into different crucibles respectively. The coarse aggregate is calcined at a high temperature of 800 - 900 °C, and the fine aggregate is calcined at a high temperature of 900 - 1100 °C.

[0017] (3) When the high-temperature calcined coarse aggregate and fine aggregate are cooled to 300 - 400 °C, mix them in a mixing plant, and add mineral powder and stir evenly.

[0018] (4) Heat the asphalt to 180 - 200 °C according to the ratio, add the anti-stripping agent, stir evenly, and then transfer it to the mixing plant to mix evenly with the acid aggregate.

[0019] Detect the adhesion between the acid aggregate and the asphalt after high-temperature calcination of the acid aggregate, as shown in Table 1 below. It can be seen that after high-temperature calcination of the acid aggregate, good adhesion with the asphalt can be achieved, solving the adhesion problem of the acid aggregate, so that the prepared asphalt concrete can effectively prevent seepage.

[0020] It should be understood that the technical scope of this invention is not limited to the content in the specification. For those of ordinary skill in the art, it can be improved or transformed according to the above description. All these improvements and transformations should fall within the protection scope of the appended claims of this invention.

Claims

1. A manufacturing process of acid aggregate modified anti-seepage asphalt concrete, characterized in that: It contains the following components: 7%-7.8% of asphalt, 55%-70% of acidic aggregate, 6%-8% of mineral powder, 0.5%-1.8% of anti-stripping agent based on the weight of asphalt, and the balance is water. The acidic aggregate is river pebble and gneiss.

2. The manufacturing process of an acid aggregate modified impermeable asphalt concrete according to claim 1, characterized in that: Among the acidic aggregates, the coarse aggregate is gneiss with a size of 13-16 mm, and the fine aggregate is river pebble with a size of 1.8-2.2 mm.

3. The manufacturing process of an acid aggregate modified impermeable asphalt concrete according to claim 2, characterized in that: The mass ratio of the coarse aggregate to the fine aggregate is 3 / 7.

4. The manufacturing process of an acid aggregate modified impervious asphalt concrete according to any one of claims 1 to 3, characterized in that: It is mainly made by the following steps: (1) Clean the dust and impurities on the surface of the acidic aggregate, screen the acidic aggregate to the appropriate particle size according to the ratio, and then pre-heat it in a drying oven at 180°C for 120 minutes. (2) Put the pre-heated coarse aggregate and fine aggregate into different crucibles respectively. The coarse aggregate is calcined at a high temperature of 800-900°C, and the fine aggregate is calcined at a high temperature of 900-1100°C.

5. (3) After the coarse aggregate and fine aggregate after high-temperature calcination are cooled to 300-400°C, they are mixed in a mixing plant, and mineral powder is added and stirred evenly.

6. (4) Heat the asphalt to 180-200°C according to the ratio, add the anti-stripping agent and stir evenly, and then transfer it to the mixing plant to be mixed evenly with the acidic aggregate.