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Sound-absorbing environmentally-friendly recycled asphalt concrete and preparation process thereof

A technology of recycled asphalt and preparation process, which is applied in the field of sound-absorbing and environmentally friendly recycled asphalt concrete and its preparation process, can solve the problems of inability to effectively reduce urban noise, poor stability, etc. Effect

Active Publication Date: 2019-05-03
SHANGHAI SHISHEN IND & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the prior art that the noise reduction stability of asphalt concrete is poor, which leads to the fact that it cannot effectively reduce urban noise during use, the first purpose of the present invention is to provide a sound-absorbing and environmentally friendly recycled asphalt concrete, which uses expanded leech Stone, sodium silicate and microporous calcium silicate work together to form a stable sound-absorbing hole structure inside the sound-absorbing environmentally friendly recycled asphalt concrete to solve the above technical problems. It has a good sound absorption and noise reduction effect, and can be used during use maintain good stability

Method used

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  • Sound-absorbing environmentally-friendly recycled asphalt concrete and preparation process thereof
  • Sound-absorbing environmentally-friendly recycled asphalt concrete and preparation process thereof
  • Sound-absorbing environmentally-friendly recycled asphalt concrete and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Example 1: A sound-absorbing and environmentally friendly recycled asphalt concrete, the components and their corresponding parts by weight are shown in Table 1, and were prepared through the following steps:

[0049] Step 1: Stir and dry the new aggregate, expanded vermiculite, microporous calcium silicate and polyester fiber in the drying barrel with the corresponding weight parts, the temperature is controlled at 110°C, the time is 20min, and the stirring speed is 900rpm , to obtain a dry mixture;

[0050] Step 2, put the dry mixture into the mixing tank, heat 60% by weight of SBS modified asphalt to 160°C, add it into the mixing tank evenly within 30s, and stir at a stirring speed of 1200rpm for 20min;

[0051] Step 3: Preheat the regenerated asphalt mixed old material to 80°C and add it together with the regeneration agent into the above mixing tank for stirring. The temperature in the mixing tank is maintained at 170°C, the stirring speed is 1100rpm, and the time...

Embodiment 2-8

[0054] Example 2-8: A sound-absorbing and environment-friendly recycled asphalt concrete. The difference from Example 1 is that each component and its corresponding parts by weight are shown in Table 1.

[0055] Each component and parts by weight thereof in table 1 embodiment 1-8

[0056]

[0057]

Embodiment 9

[0058] Example 9: A sound-absorbing and environmentally friendly recycled asphalt concrete. The difference from Example 1 is that the new aggregate mainly has a particle size range of 0-3mm, 3-5mm, 5-13mm, 13-20mm, 20- The 25mm limestone is composed of 1.4:2.6:7.6:1:3.5 in parts by weight.

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Abstract

The invention discloses sound-absorbing environmentally-friendly recycled asphalt concrete and a preparation process thereof, relates to the technical field of asphalt concrete processing, and solvesthe problem that asphalt concrete cannot effectively reduce urban noise during use due to poorer stability of noise reduction of the asphalt concrete. The asphalt concrete comprises the following components, in parts by weight: 75-80 parts of novel aggregate, 4-6 parts of SBS modified asphalt, 0.2-0.3 part of mineral powder, 16-22 parts of a recycled asphalt mixed old material, 0.04-0.08 part of aregenerant, 2.5-4.5 parts of a fibrous filler, 4-6 parts of a high-temperature-resistant sound-absorbing material, 3-3.5 parts of expanded vermiculite, 0.6-1.2 parts of water glass, and 0.4-0.8 partof microporous calcium silicate. The sound-absorbing environmentally-friendly recycled asphalt concrete provided by the invention has good sound-absorbing noise-reducing effects, can maintain good stability during use, and has a longer overall service life.

Description

technical field [0001] The invention relates to the technical field of asphalt concrete processing, in particular to a sound-absorbing and environmentally friendly recycled asphalt concrete and a preparation process thereof. Background technique [0002] Asphalt concrete, commonly known as asphalt concrete, is artificially selected with a certain gradation composition of mineral materials, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, mixed under strictly controlled conditions made mixture. [0003] A Chinese invention patent with application publication number CN108147728A discloses a rubber asphalt concrete and its preparation process. The raw material components of the rubber asphalt concrete include: 50-60 parts of mineral powder fly ash, 20-30 parts of stone chips, limestone 6-8 parts, 10-15 parts of cement, 5-10 parts of supramolecular rubber composite material, 6-10 parts of asphalt, 2-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B38/08C04B18/14C04B111/52
CPCY02W30/91
Inventor 时清照
Owner SHANGHAI SHISHEN IND & TRADE CO LTD
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