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A light-weight high-strength water-dense asphalt mixture and its preparation method

A kind of asphalt mixture and water-tight type technology, which is applied in the field of light-weight high-strength water-dense asphalt mixture and its preparation, can solve the problems that are in the initial stage, the density is low, and the value of engineering application has not received due attention, so as to achieve improvement The effect of stress state, small gap, and excellent comprehensive road performance

Active Publication Date: 2021-03-16
JIANGSU SINOROAD ENG TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Light aggregate asphalt mixture has the characteristics of low density, high modulus and superior rutting resistance, water stability and skid resistance, and can be used as the best mixture to improve the service life of highway bridges. It is still in its infancy, and its engineering application value has not received due attention

Method used

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  • A light-weight high-strength water-dense asphalt mixture and its preparation method
  • A light-weight high-strength water-dense asphalt mixture and its preparation method
  • A light-weight high-strength water-dense asphalt mixture and its preparation method

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preparation example Construction

[0042] The invention also discloses a method for preparing light-weight, high-strength, water-dense asphalt mixture, which includes the following steps:

[0043] Step 1, weighing by parts by weight;

[0044] Step 2, adding the diabase heated to 175°C to 185°C into the mixing equipment, and stirring in the mixing equipment for 5-10 seconds;

[0045] Step 3. Add the shale heated to 120°C to 130°C and pre-coated with matrix asphalt into the product obtained in step 2 and stir for 5-10 seconds;

[0046] Step 4, add rock asphalt and composite modifier at normal temperature to the product obtained in step 3, stir for 5-10 seconds,

[0047] Step 5. Preheat the base asphalt to 155°C to 165°C, then add it to the product obtained in step 4 and stir for 30-45 seconds;

[0048] Step 6. Add limestone powder to the product obtained in step 5 and stir for 10-15 seconds to obtain a light, high-strength, water-dense asphalt mixture.

[0049] As a preferred technical solution, the stirring t...

Embodiment 1

[0053]Prepare light-weight high-strength water-dense asphalt mixture according to the following steps:

[0054] Step 1. Weigh according to the following parts by weight: 5 parts, 30 parts, 100 parts, 10 parts, and 5 parts of 90# matrix asphalt, shale, mineral material, Qingchuan rock asphalt, and composite modifier;

[0055] Among them, the particle size of shale is 3-15mm, and the mineral material is weighed by diabase and limestone powder with a particle size of 0.075-15mm at a weight ratio of 100:4;

[0056] In addition, the composite modifier is composed of 10 parts of polyethylene, 10 parts of polypropylene, 5 parts of polysulfide rubber, and 10 parts of SBS modifier;

[0057] Step 2, adding the diabase heated to 175°C to 185°C into the mixing equipment, and stirring in the mixing equipment for 10 seconds;

[0058] Step 3. Add the shale heated to 120°C to 130°C and pre-coated with matrix asphalt into the product obtained in step 2 and stir for 10 seconds;

[0059] Step ...

Embodiment 2

[0065] Prepare light-weight high-strength water-dense asphalt mixture according to the following steps:

[0066] Step 1, weighing according to the following parts by weight: 110# base asphalt, shale, mineral material, Qingchuan rock asphalt, composite modifier are respectively 20 parts, 80 parts, 100 parts, 3 parts, 1 part;

[0067] Among them, the particle size of shale is 3-15mm, and the mineral material is weighed by diabase and limestone powder with a particle size of 0.075-15mm at a weight ratio of 100:7;

[0068] In addition, the composite modifier is composed of 40 parts of polyethylene, 40 parts of polypropylene, 20 parts of polysulfide rubber, and 20 parts of SBS modifier;

[0069] Step 2, adding the diabase heated to 175°C to 185°C into the mixing equipment, and stirring in the mixing equipment for 10 seconds;

[0070] Step 3. Add the shale heated to 120°C to 130°C and pre-coated with matrix asphalt into the product obtained in step 2 and stir for 10 seconds;

[00...

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Abstract

The invention discloses a lightweight high-strength dense water type asphalt mixture, which comprises the following components by weight: 5-20 parts of matrix asphalt; 30-80 parts of shale; 100 partsof a mineral material; 3-10 of rock asphalt and 1-5 parts of a composite modifier; wherein the mineral material comprises diabase having a particle diameter of 0.075 mm to 15 mm and limestone ore powder having a particle diameter of less than 0.075 mm in a weight ratio of 100:4 to 7. The lightweight high-strength dense water type asphalt mixture has small density, high modulus, small void ratio and good road performance. When used for concrete bridge deck pavement paving or highway pavement paving, the paving layer quality can be effectively reduced under the condition that the pavement structure thickness is constant, and the bearing of a concrete bridge structure or a semi-rigid base layer structure is reduced; under the same bearing capacity, the paving layer structure thickness can beincreased, reflection cracks caused by the crack of a concrete bridge deck or a semi-rigid base layer can be reduced, and the pavement durability can be improved.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a pavement material for highway pavements and concrete bridge decks and a preparation method thereof, in particular to a light-weight, high-strength water-dense asphalt mixture and a preparation method thereof. Background technique [0002] With the rapid development of the national transportation industry, a large number of highways have been built in China. Bridges are an important part of highway construction. The total length of bridges in some expressways accounts for 10-15% of the total length of the road surface. The cement concrete bridge has the characteristics of high cost performance, which occupies a large proportion in the modern bridge construction in our country, and has become one of the most common highway bridge forms. With the continuous extension of service time and the rapid growth and accumulation of vehicle loads, the safety and durability of pavem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/40
CPCC04B26/26C04B2111/40C04B2201/20C04B14/108C04B14/14C04B24/2611C04B24/166C04B24/2676
Inventor 张辉罗瑞林关永胜潘友强陈李峰吕浩
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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