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Cold-patch additive material and preparation method and application thereof

An additive material and cold patching technology, applied in building insulation materials, building components, buildings, etc., can solve the problems of road surface damage, low initial strength of cold patched asphalt mixture, and inability to resist vehicles, etc., to improve storage and workability , good durability and bonding performance, and the effect of saving secondary repair costs

Active Publication Date: 2019-07-05
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When the amount of thinner is increased or the volatilization speed of thinner is slowed down in order to ensure good storage and workability, the strength formation speed of cold-patched asphalt mixture will decrease, and the initial strength of the repaired pavement is insufficient to resist the vehicle load.
Therefore, the existing cold-patching additives cannot meet the requirements of cold-patching asphalt mixtures for storage, workability, and strength; at the same time, the existing cold-patching additives lack effective methods for improving the initial strength of cold-patching asphalt mixtures. It cannot guarantee that the cold-patch asphalt mixture can be well bonded to each other in the initial stage of pavement repair, resulting in a low initial strength of the cold-patch asphalt mixture, which cannot resist the vehicle load in the initial stage of use, making the pavement very difficult after repair. Diseases such as loosening, peeling, and shifting will soon appear, resulting in pavement damage

Method used

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  • Cold-patch additive material and preparation method and application thereof

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preparation example Construction

[0023] The preparation method of the cold patching additive material of the present invention comprises the following steps,

[0024] Step 1, in terms of mass percentage, respectively weighing 17%-20% of trichlorethylene, 11%-16% of SBS, 13%-21% of clear oil, 42%-46% of diesel oil, and 9%-13% of EVA;

[0025] Step 2, according to the mass percentage in step 1, add SBS to the trichlorethylene, fully stir on the high-speed shear until there is no solid residue in the trichlorethylene, generally at a stirring speed of 1000 to 2000 rpm Stir in the container for 20-30 minutes to prepare prepolymer A, which can improve the cohesiveness of modified asphalt mixture;

[0026] Step 3, according to the mass percentage in step 1, add EVA to the diesel oil, fully stir on the high-speed shearing instrument until there is no solid residue in the diesel oil, generally stir in a stirrer with a speed of 1000-2000 rpm for 20- It takes only 30 minutes to prepare prepolymer B. Prepolymer B can im...

Embodiment 1

[0029] The cold repair additive of the present invention is prepared from trichlorethylene, SBS, clear oil, diesel oil and EVA, and its mass percentage composition is: 20% of trichlorethylene, 16% of SBS, 13% of clear oil, 42% of diesel oil and 9% of EVA.

[0030] The preparation method of the cold patch additive material comprises the following steps,

[0031] Step 1, by mass percentage, take respectively 20% of trichlorethylene, SBS 16%, clear oil 13%, diesel oil 42% and EVA 9%;

[0032]Step 2, according to the mass percentage in step 1, add SBS in the trichlorethylene solution, fully stir in the high-speed shearing instrument, until there is no solid residue in the trichlorethylene, generally in a stirrer with a rotating speed of 1000 rpm Stir in medium for 30 minutes to obtain prepolymer A;

[0033] Step 3, according to the mass percentage in step 1, add EVA in the diesel oil, fully stir in the high-speed shearing instrument, until there is no solid residue in the diesel ...

Embodiment 2

[0037] The cold repair additive of the present invention is prepared from trichlorethylene, SBS, clear oil, diesel oil and EVA, and its mass percentage is composed of: trichloroethylene 17%, SBS 11%, clear oil 21%, diesel oil 42%,

[0038] EVA9%.

[0039] The preparation method of the cold patch additive material comprises the following steps,

[0040] Step 1, by mass percentage, take respectively 17% of trichlorethylene, SBS 11%, clear oil 21%, diesel oil 42% and EVA 9%;

[0041] Step 2, according to the mass percentage in step 1, add SBS in the trichlorethylene solution, fully stir in the high-speed shearing instrument, until there is no solid residue in the trichlorethylene, until there is no solid residue in the trichlorethylene, generally Stir in a stirrer at 1400 rpm for 25 minutes to obtain prepolymer A;

[0042] Step 3, according to the mass percentage in step 1, add EVA in the diesel oil, fully stir in the high-speed shearing instrument, until there is no solid resi...

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Abstract

The invention relates to a cold-patch additive material and a preparation method and application thereof. The material is prepared from 17%-20% of trichloroethylene, 11%-16% of SBS, 9%-13% of EVA, 42%-46% of diesel and13%-21% of clean oil; during preparation, the SBS is added into the trichloroethylene until no solid residues exist to obtain a prepolymer A, the EVA is added into the diesel until no solid residues exist to prepare a prepolymer B, the prepolymer A and the prepolymer B are poured into the clean oil to prepare the cold-patch additive material; when a modified asphalt mixture is prepared, the cold-patch additive material accounts for 10%-14%, asphalt accounts for 72%-80%, and a diluent accounts for 10%-14%. The cold-patch additive material and the preparation method and application thereof have the advantages that a capsule technology and a polymer thickening and reinforcing technology are introduced, the storage performance, workability, initial strength, durability and bonding performance of the modified asphalt mixture can be improved, and it is ensured that the modified asphalt mixture has excellent performance.

Description

technical field [0001] The invention belongs to the technical field of road maintenance, in particular to a cold repair additive material and its preparation method and application. Background technique [0002] The existing cold-patch additives at home and abroad are mainly composed of modifiers, diluents and other components. The diluent can reduce the viscosity of asphalt, making the cold-patch asphalt mixture have a smaller viscosity at room temperature or low temperature, ensuring that the cold-patch asphalt mixture It has certain storability and workability at the use temperature; the modifier is mainly to make up for the performance lost by the asphalt after adding the diluent, so as to ensure that the cold-patch asphalt mixture has certain high-temperature and low-temperature stability and strength. [0003] However, for the existing cold-patch additives, only a single diluent is used to improve the storage and workability of the cold-patch asphalt mixture. The amoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L91/00C08L53/02C08L23/08C08K5/02C08L95/00
CPCC08L91/00C08L95/00C08L2205/025C08L2205/035C08L53/02C08L23/0853C08K5/02
Inventor 韩森韩霄刘梦梅原健安刘亚敏梁建高巍
Owner CHANGAN UNIV
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