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Early strength type emulsified asphalt cold recycled mixture and preparation method thereof

A technology for cold recycling mixture and emulsified asphalt, which is applied in the field of road materials, can solve the problems of reducing the low temperature performance of the mixture, the high price of early-strength cement, and increasing the operating cost, and achieves the advantages of improving early strength, facilitating promotion and implementation, and improving strength. Effect

Active Publication Date: 2018-11-13
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three documents all increase the early strength of the emulsified asphalt mixture by adding early-strength cement. The early-strength cement is expensive and increases the operating cost. In addition, the use of early-strength cement to improve the early strength will reduce the mixture to a certain extent. Low temperature performance, and the use of early strength cement, poor adjustability for different construction conditions

Method used

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  • Early strength type emulsified asphalt cold recycled mixture and preparation method thereof
  • Early strength type emulsified asphalt cold recycled mixture and preparation method thereof
  • Early strength type emulsified asphalt cold recycled mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1. Preparation of early-strength emulsified asphalt cold recycled mixture

[0053] 1. Formula

[0054] In terms of parts by mass, the early-strength emulsified asphalt cold recycled mixture in this example consists of the following components:

[0055]

[0056] 2. Preparation method

[0057] Prepare early-strength emulsified asphalt cold recycled mixture according to the following steps:

[0058] (1) According to the above formula, weigh each raw material and set aside. Among them, the spent catalytic cracking catalyst is pre-heated to 120°C to remove the moisture in it, and after cooling to normal temperature, it is weighed for later use; the new aggregate is pre-heated to 120°C, and the moisture in it is removed, and after cooling to normal temperature, it is weighed for later use. .

[0059] (2) Mix recycled asphalt mixture, new aggregate, mineral powder, cement and spent catalytic cracking catalyst, stir for 10s (rotating speed: 100 rpm), add water, a...

Embodiment 2

[0073] Example 2. Preparation of early-strength emulsified asphalt cold recycled mixture

[0074] 1. Formula

[0075] In terms of parts by mass, the early-strength emulsified asphalt cold recycled mixture in this example consists of the following components:

[0076]

[0077] 2. Preparation method

[0078] Prepare early-strength emulsified asphalt cold recycled mixture according to the following steps:

[0079] (1) According to the above formula, weigh each raw material and set aside. Wherein, the treatment of spent catalytic cracking catalyst and new aggregate is the same as that of Example 1.

[0080] (2) Mix recycled asphalt mixture, new aggregate, mineral powder, cement and spent catalytic cracking catalyst, stir for 10s (rotating speed: 100 rpm), add water, and stir for 30 seconds (rotating speed: 120 rpm).

[0081] (3) Add emulsified asphalt to the material obtained in step (2), and stir for 60 seconds (rotating speed is 120 rpm). The properties of the emulsified a...

Embodiment 3

[0094] Example 3, preparation of early-strength emulsified asphalt cold recycled mixture

[0095] 1. Formula

[0096] In terms of parts by mass, the early-strength emulsified asphalt cold recycled mixture in this example consists of the following components:

[0097]

[0098]

[0099] 2. Preparation method

[0100] Prepare early-strength emulsified asphalt cold recycled mixture according to the following steps:

[0101] (1) According to the above formula, weigh each raw material and set aside. Wherein, the treatment of spent catalytic cracking catalyst and new aggregate is the same as that of Example 1.

[0102] (2) Mix recycled asphalt mixture, new aggregate, mineral powder, cement and spent catalytic cracking catalyst, stir for 10s (rotating speed: 100 rpm), add water, and stir for 30 seconds (rotating speed: 120 rpm).

[0103] (3) Add emulsified asphalt to the material obtained in step (2), and stir for 60 seconds (rotating speed is 120 rpm). The properties of th...

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Abstract

The invention discloses an early strength type emulsified asphalt cold recycled mixture and a preparation method thereof. The early strength type emulsified asphalt cold recycled mixture is composed of emulsified asphalt, porous high-specific-surface-area materials, recycled asphalt mixtures, new aggregates, mineral powder, cement and water, wherein the porous high-specific-surface-area materialscan be waste catalytic cracking catalysts and / or zeolite. During mixing of the early strength type emulsified asphalt cold recycled mixture, the low-price and easily-acquired porous high-specific-surface-area materials can absorb a part of water via pores to promote loss of water at the interface of the asphalt and the aggregates to achieve the effects of rapid setting. Meanwhile, due to the highhardness, the porous high-specific-surface-area materials can improve the strength of the early strength type emulsified asphalt cold recycled mixture; besides, with the high absorbability of a porousstructure, the porous high-specific-surface-area materials can enhance the kinetic energy of oil-in-water particles inside the emulsified asphalt moving towards the surface of the aggregates and promote asphalt particles to more uniformly wrap the surface of the aggregates after the emulsified asphalt is demulsified, thereby enhancing the early strength of the early strength type emulsified asphalt cold recycled mixture and achieving the effects of bring forward traffic communication opening.

Description

technical field [0001] The invention belongs to the technical field of road materials, and in particular relates to an early-strength emulsified asphalt cold recycled mixture and a preparation method thereof. Background technique [0002] Compared with the traditional asphalt pavement maintenance technology, the emulsified asphalt cold recycling technology can be constructed at room temperature, and has many advantages such as saving energy, saving resources, reducing costs, and simple construction. An economical, environmentally friendly and practical road maintenance method. At present, the emulsified asphalt cold recycled mixture has low early strength, is easy to loose and break, and blocks traffic for a long time, which restricts its popularization and application in engineering. [0003] Invention patent CN104559254A discloses an early-strength type emulsion for cold recycling of asphalt pavement and its preparation method and application. The raw materials for prepa...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04C04B18/04
CPCC04B18/0481C04B28/00C04B28/04C04B2201/05C04B2201/50C04B24/36C04B18/167C04B14/28Y02W30/91
Inventor 王志超李福起裴晓光杨国明刘树俊
Owner CHINA NAT OFFSHORE OIL CORP
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