A kind of preparation method of cold supplement for asphalt cold supplement

A technology of cold patching agent and cold patching material, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of poor strength of asphalt cold patching material, damage of cold patching material, and poor service life, etc., and achieve good early strength, Effect of lowering viscosity and improving initial strength

Active Publication Date: 2021-11-16
WUHAN MUNICIPAL CONSTR GROUP +1
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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

[0018] (1) Select and weigh tall oil and concentrated sulfuric acid at a molar ratio of 1:0.4, put the tall oil into the reactor, add concentrated sulfuric acid dropwise while stirring, the reaction temperature is 35°C, the stirring speed is 300 r / min, and the titration time is 0.5h, the intermediate product A was obtained.

[0019] (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 to obtain surfactant B.

[0020] (3) Stir and mix turpentine and acetic acid at a mass ratio of 1:0.1 to obtain a turpentine mixture.

[0021] (4) Select and weigh the mixture of resin, surfactant B and turpentine according to the mass ratio of 1:0.05:0.3, transfer it to the reactor for shearing and stirring, the temperature is 80°C, and the shearing stirring rate is 800 r / min, The shearing and stirring time is 0.5h, and cooling to room temperature obtains the co...

Embodiment 2

[0027] (1) Select and weigh tall oil and concentrated sulfuric acid at a molar ratio of 1:0.5, put the tall oil into the reactor, add concentrated sulfuric acid dropwise while stirring, the reaction temperature is 40°C, the stirring speed is 400 r / min, and the titration time is 0.8h, the intermediate product A was obtained.

[0028] (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 to obtain surfactant B.

[0029] (3) Stir and mix turpentine and acetic acid at a mass ratio of 1:0.15 to obtain a turpentine mixture.

[0030] (4) Select and weigh the mixture of resin, surfactant B and turpentine according to the mass ratio of 1:0.08:0.4, transfer it to the reactor for shearing and stirring, the temperature is 90°C, and the shearing stirring rate is 900 r / min, The shearing and stirring time is 0.8h, and the cold supplement is obtained by cooling ...

Embodiment 3

[0036] (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 500 r / min, and the titration time is 1h, the intermediate product A was obtained.

[0037] (2) Put the product A into the reactor, titrate the alkali while stirring, the reaction temperature is 30°C, and the stirring speed is 400 r / min, until the solution pH=9.5, stop the titration to obtain surfactant B.

[0038] (3) Stir and mix turpentine and acetic acid at a mass ratio of 1:0.2 to obtain a turpentine mixture.

[0039] (4) Select and weigh the mixture of resin, surfactant B and turpentine according to the mass ratio of 1:0.1:0.5, transfer it to the reactor for shearing and stirring, the temperature is 100°C, and the shearing stirring rate is 1000 r / min, The shearing and stirring time is 1 h, and the cold supplement is obtained by cooling t...

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PUM

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Abstract

The invention discloses a cold patching agent for asphalt cold patching material and a preparation method thereof, which is prepared by chemically reacting tall oil, concentrated sulfuric acid, turpentine, acetic acid, and resin in a certain proportion. Aiming at the problems of poor water stability and slow strength formation of cold-patch asphalt mixture at present, the present invention develops an asphalt that increases the strength formation speed of asphalt cold-patch material and improves its water stability without increasing the viscosity of cold-patch asphalt Cold tonic.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a preparation method of a cold patching agent for asphalt cold patching material. 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 d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L93/04C08L93/00C08L57/02C08L91/00C08L45/00
CPCC08L95/00C08L2205/03C08L93/04C08L93/00C08L57/02C08L91/00C08L45/00
Inventor 李强黄小霞罗宵高萍储昭胜卢吉苗强唐光涛徐波向劲松代超易琳张达江鑫
Owner WUHAN MUNICIPAL CONSTR GROUP
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