Quick-hardening high-strength asphalt cold patch material and preparation method thereof

A technology of cold patch and asphalt, which is applied in the field of road engineering materials, can solve the problems of poor strength of asphalt cold patch, damage of cold patch, and poor service life, etc., and achieve good early strength, reduce viscosity, and improve initial strength.

Active Publication Date: 2019-12-06
武汉博盾工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The strength of asphalt cold patch is gradually formed with the volatilization of diesel oil. Since diesel oil dissolves asphalt, the volatility is poor, so the early strength of asphalt cold patch is poor
When the road damage is repaired with asphalt cold patch, as the traffic opens, the cold patch may be damaged again under the action of driving, and the service life is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The asphalt used is No. 70 A grade road petroleum asphalt, the aggregate is limestone crushed stone, the filler is limestone powder, the diesel is commercially available No. 0 diesel, and the chemical reagents are all commercially available chemical reagents.

[0022] 1. Synthesize special cold tonic first

[0023] (1) Tall oil and concentrated sulfuric acid are selected and weighed in a molar ratio of 1:0.4, the tall oil is loaded into the reactor, and concentrated sulfuric acid is added dropwise while stirring. The reaction temperature is 35°C, the stirring speed is 300r / min, and the titration time is 0.5 h, to obtain the intermediate product A.

[0024] (2) Put the product A into the reactor, titrate the alkali while stirring, the reaction temperature is 25° C., the stirring speed is 200 r / min, until the solution pH=8.5, stop the titration, and obtain the surfactant B.

[0025] (3) Stir and mix turpentine and acetic acid according to a mass ratio of 1:0.1 to obtain ...

Embodiment 2

[0039] The asphalt used is No. 70 A grade road petroleum asphalt, the aggregate is limestone crushed stone, the filler is limestone powder, the diesel is commercially available No. 0 diesel, and the chemical reagents are all commercially available chemical reagents.

[0040] 1. Synthesize special cold tonic first

[0041] (1) Tall oil and concentrated sulfuric acid are selected and weighed at a molar ratio of 1:0.5, and the tall oil is loaded into the reactor, and concentrated sulfuric acid is added dropwise while stirring, the reaction temperature is 40°C, the stirring speed is 400r / min, and the titration time is 0.8 h, to obtain the intermediate product A.

[0042] (2) Put the product A into the reactor, titrate the alkali while stirring, the reaction temperature is 28° C., the stirring speed is 300 r / min, until the solution pH=9, stop the titration, and obtain the surfactant B.

[0043] (3) Stir and mix turpentine and acetic acid at a mass ratio of 1:0.15 to obtain a turpe...

Embodiment 3

[0057] The asphalt used is No. 70 A grade road petroleum asphalt, the aggregate is limestone crushed stone, the filler is limestone powder, the diesel is commercially available No. 0 diesel, and the chemical reagents are all commercially available chemical reagents.

[0058] 1. Synthesize special cold tonic first

[0059] (1) Select and weigh tall oil and concentrated sulfuric acid at a molar ratio of 1:0.6, put tall oil into the reactor, add concentrated sulfuric acid dropwise while stirring, the reaction temperature is 45°C, the stirring speed is 500r / min, and the titration time is 1h , to obtain the intermediate product A.

[0060] (2) Put the product A into the reactor, titrate the alkali while stirring, the reaction temperature is 30° C., the stirring speed is 400 r / min, until the solution pH=9.5, stop the titration, and obtain the surfactant B.

[0061] (3) Stir and mix turpentine and acetic acid in a mass ratio of 1:0.2 to obtain a turpentine emulsion.

[0062] (4) Re...

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PUM

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Abstract

The invention discloses a quick-hardening high-strength asphalt cold patch material and a preparation method thereof, wherein the quick-hardening high-strength asphalt cold patch material is preparedby mixing aggregate, a filler, diesel oil, asphalt and a special cold patch agent, and the special cold patch agent is prepared by carrying out a chemical reaction on tall oil, concentrated sulfuric acid, turpentine, acetic acid and a resin according to a certain. Based on the problems of poor water stability and slow strength formation of the existing cold patch asphalt mixture, the invention provides an asphalt cold patch agent capable of increasing the strength formation speed of the asphalt cold patch material and improving the water stability of the asphalt cold patch material without theincrease of the viscosity of the cold patch asphalt.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a fast-hardening high-strength asphalt cold patch and a preparation method thereof. Background technique [0002] At present, most of the main roads in our country use asphalt pavement. With the increase of the service life, roads have successively appeared pits, cracks and other diseases, and my country's roads have entered the stage of large-scale maintenance. In order to maintain the traffic function of the road surface, these roads must be repaired and maintained in time. For small defects such as potholes and damage, asphalt cold patch is generally used for repair. [0003] Asphalt cold patch is generally a product obtained by adding diesel oil to ordinary hot-mix asphalt mixture. Under the dilution of diesel oil, paving and rolling operations at room temperature can be realized. After the construction is completed, with the volatilization of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B111/72
CPCC04B26/26C04B2111/72C04B18/12C04B24/34C04B24/04C04B24/00C04B14/28C04B24/28
Inventor 黄绍龙沈凡储昭胜黄小霞罗宵李强蔡祥
Owner 武汉博盾工程科技有限公司
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