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A kind of room temperature asphalt concrete and preparation method thereof

A room temperature asphalt and concrete technology, applied in the field of water conservancy and hydropower engineering, can solve the problems of large porosity and poor impermeability of asphalt concrete at room temperature, and achieve the effects of strong adaptability to deformation, good impermeability and high mechanical strength.

Active Publication Date: 2017-11-24
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high porosity and poor anti-seepage of room temperature asphalt concrete mentioned above, the present invention provides a room temperature asphalt concrete which can be used in anti-seepage structures of water conservancy and hydropower projects and its preparation method

Method used

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  • A kind of room temperature asphalt concrete and preparation method thereof
  • A kind of room temperature asphalt concrete and preparation method thereof
  • A kind of room temperature asphalt concrete and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0049] The aggregate and mineral powder are both made of granite, and the mass percentage of the mineral aggregate is: 8% for the aggregate with a particle size d (mm) range of 16≥d>9.5, 20% for the aggregate with 9.5≥d>4.75, 4.75 The aggregate of ≥d>2.36 is 26%, the aggregate of 2.36≥d>0.075 is 40%, the cement and granite mineral powder filler of d≤0.075 each account for 3.0%; the oil-stone ratio is 6.7%. Pour the screened aggregate into the mixing container and heat it to 150°C and stir evenly. Pour the room temperature asphalt produced by the mixing type room temperature asphalt liquefaction agent into the mixing container and stir evenly. Pour the filler composed of cement and granite mineral powder into the mixing container. The container is stirred evenly, and the asphalt mixture is continuously heated until the moisture in the room temperature asphalt is discharged, thereby preparing the room temperature asphalt concrete of the present invention.

Embodiment 2

[0051] Both aggregate and mineral powder are made of limestone, and the mass percentage of mineral aggregate is: 13% for aggregate with particle size d (mm) in the range of 16≥d>9.5, 16% for aggregate with 9.5≥d>4.75, The aggregate of 4.75≥d>2.36 is 25%, the aggregate of 2.36≥d>0.075 is 40%, the cement and limestone mineral powder filler of d≤0.075 each account for 3.0%; the oil-stone ratio is 6.6%. Pour the screened aggregate into the mixing container and heat it to 150°C and stir evenly. Pour the room temperature asphalt produced by mixing type room temperature asphalt liquefaction agent into the mixing container and stir evenly. Pour the filler composed of cement and limestone mineral powder into the mixing container. Stir the container and stir evenly, continue to heat the asphalt mixture until the moisture in the room temperature asphalt is discharged, so as to prepare the room temperature asphalt concrete of the present invention.

Embodiment 3

[0053] Both aggregate and mineral powder are made of limestone, and the mass percentage of mineral aggregate is: 12% for aggregate with particle size d (mm) in the range of 16≥d>9.5, 17% for aggregate with 9.5≥d>4.75, The aggregate of 4.75≥d>2.36 is 25%, the aggregate of 2.36≥d>0.075 is 40%, the cement and limestone mineral powder filler of d≤0.075 each account for 3.0%; the oil-stone ratio is 6.6%. Pour the screened aggregate into the mixing container and heat it to 150°C and stir evenly. Pour the room temperature asphalt produced by mixing type room temperature asphalt liquefaction agent into the mixing container and stir evenly. Pour the filler composed of cement and limestone mineral powder into the mixing container. Stir the container and stir evenly, continue to heat the asphalt mixture until the moisture in the room temperature asphalt is discharged, so as to prepare the room temperature asphalt concrete of the present invention.

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Abstract

The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to room-temperature bituminous concrete and a preparation method thereof. The room-temperature bituminous concrete is prepared from the following raw materials: in percentage by weight, 8%-13% of aggregate with the particle diameter larger than 9.5mm and smaller than or equal to 16mm, 16%-21% of aggregate with the particle diameter larger than 4.75mm and smaller than or equal to 9.5mm, 25%-26% of aggregate with the particle diameter larger than 2.36mm and smaller than or equal to 4.75mm, 38%-40% of aggregate with the particle diameter larger than 0.075mm and smaller than or equal to 2.36mm and 6.0% of aggregate with the particle diameter smaller than or equal to 0.075mm; the ratio of the bitumen to aggregate is 6.5%-7.0% and represents the ratio of the weight of the room-temperature bitumen to the total weight of the aggregate and padding. The room-temperature bituminous concrete provided by the invention solves the problems that conventional room-temperature bituminous concrete cannot be applied to an anti-seepage structure of the water conservancy and hydropower engineering due to high porosity and poor anti-seepage performance.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and hydropower engineering, in particular to a room temperature asphalt concrete and a preparation method thereof. Background technique [0002] Asphalt concrete has been used as an anti-seepage structure for water conservancy and hydropower projects for many years. At present, roller compacted asphalt concrete is more commonly used, but roller compacted asphalt concrete is a kind of hot asphalt concrete, and the heating temperature of asphalt is generally 150-170°C. The aggregate heating temperature is generally 170-200°C, therefore, a large amount of energy is consumed in the process of production and construction. [0003] Room temperature asphalt can be produced by mixing asphalt liquefaction agent with asphalt. For example, Chinese patent 201010189089.2 discloses a mixing type room temperature asphalt liquefaction agent, which can produce room temperature asphalt. The use of room t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B14/14C04B14/28
CPCC04B26/26C04B14/048C04B14/28
Inventor 伍小玉刘志郝元麟叶发明何顺宾王晓安王观琪卢羽平王晓东杨星
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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