A kind of road sealant and preparation method thereof

A sealant and road technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of high softening point of sealant, particles, and affect the appearance, so as to increase the compactness and weather resistance performance, improve high temperature resistance, and improve the effect of low temperature resistance

Active Publication Date: 2020-09-01
河南公路卫士交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two problems were found in the actual construction and use of the qualified sealant: 1. Because the softening point of the sealant is high, it is difficult to melt during construction, and the melting time is long, which increases labor costs and energy waste; 2. Because the added ingredients contain rubber particles , the surface of the material after construction is rough, affecting the appearance
Aiming at this problem, the research found that the cause of this problem is the raw material rubber powder, because the rubber powder is obtained by recycling tires, the composition is complex, and it cannot be completely integrated in the ordinary production process of sealant, and there are always particles

Method used

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  • A kind of road sealant and preparation method thereof
  • A kind of road sealant and preparation method thereof
  • A kind of road sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A road sealant, the composition of raw materials (parts by weight): 65 parts of No. 90 base asphalt, 8 parts of styrene-butadiene-styrene block copolymer, 2 parts of elemental sulfur, 10 parts of 600 mesh rubber powder, softening oil 5 parts, 5 parts of 1200 mesh bentonite, 5 parts of 800 mesh calcium carbonate powder.

[0028] The preparation method of above-mentioned road sealant, the steps are as follows:

[0029] (1) Preparation of modifier mother liquor:

[0030] Add 10 parts of asphalt and 5 parts of softening oil into the swelling tank, heat to 230°C, add 10 parts of rubber powder, and continue to react for 24 hours under the stirring condition of 2500rpm, keep warm for compounding;

[0031] (2) Add 55 parts of asphalt into the mixing tank, add 8 parts of styrene-butadiene-styrene block copolymer, and stir and mix evenly through a high-speed shear mill at 2500 rpm (the temperature requirement for the whole process is 180°C);

[0032] (3) Under the stirring cond...

Embodiment 2

[0038] A road sealant, the composition of raw materials (parts by weight): 60 parts of No. 90 base asphalt, 5 parts of styrene-butadiene-styrene block copolymer, 1 part of elemental sulfur, 8 parts of 500 mesh rubber powder, softening oil 8 parts, 8 parts of 1500 mesh bentonite, 8 parts of carbon 1000 mesh calcium acid powder.

[0039] The preparation method of above-mentioned road sealant, the steps are as follows:

[0040] (1) Preparation of modifier mother liquor:

[0041] Add 8 parts of asphalt and 8 parts of softening oil into the swelling tank, heat to 240 ° C, add 8 parts of rubber powder, and continue to react for 20 hours under the stirring condition of 2500 rpm, keep warm and wait for compounding;

[0042] (2) Add 52 parts of asphalt into the mixing tank, add 5 parts of styrene-butadiene-styrene block copolymer, and stir and mix evenly through a high-speed shear mill at 2500 rpm (the temperature requirement for the whole process is 180°C);

[0043] (3) Under the st...

Embodiment 3

[0049] A road sealant, the composition of raw materials (parts by weight): 70 parts of No. 90 base asphalt, 10 parts of styrene-butadiene-styrene block copolymer, 3 parts of elemental sulfur, 12 parts of 800 mesh rubber powder, softening oil 3 parts, 3 parts of 1000 mesh bentonite, 3 parts of 600 mesh calcium carbonate powder.

[0050] The preparation method of above-mentioned road sealant, the steps are as follows:

[0051] (1) Preparation of modifier mother liquor:

[0052] Add 12 parts of asphalt and 3 parts of softening oil into the swelling tank, heat to 220 ° C, add 12 parts of rubber powder, and continue to react for 30 hours under the stirring condition of 2500 rpm, keep warm and wait for compounding;

[0053] (2) Add 58 parts of asphalt into the mixing tank, add 10 parts of styrene-butadiene-styrene block copolymer, and stir and mix evenly through a high-speed shear mill at 2500 rpm (the temperature requirement for the whole process is 180°C);

[0054] (3) Under the...

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Abstract

The invention belongs to the technical field of engineering materials and relates to a road sealant and a preparation method thereof. The road sealant is made from, by weight, 60-70 parts of No. 90 matrix asphalt, 5-10 parts of styrene-butadiene-styrene block copolymer, 1-3 parts of elemental sulfur, 8-12 parts of rubber powder, 3-8 parts of softening oil, 3-8 parts of 1200-mesh bentonite, and 3-8parts of 800-mesh calcium carbonate powder. The road sealant provided herein has good resistance to low temperature and good mobility and most importantly, melts easily. The combining process in theproduction method enables the rubber powder to fully and completely melt with asphalt, so that the high temperature resistance of the rubber powder is given to full play. The product processed via thepreparation method has fine texture and is free of particles; the constructive melting temperature is about 10-15 DEG C lower than that of a product prepared without shearing.

Description

technical field [0001] The invention belongs to the field of road engineering materials, and in particular relates to a road sealant and a preparation method thereof. Background technique [0002] Cracks are the main form of early damage to the pavement. In order to prevent water from penetrating into the substructure of the pavement and causing irreversible damage to the subgrade, the use of road sealant to fill is one of the commonly used remedial measures. [0003] During use, the sealant needs to withstand the test of high temperature in summer. Therefore, it is required that the sealant should have good high temperature resistance and good thermoplasticity. This requires adding a large amount of modified materials during production to meet the performance index requirements. However, two problems were found in the actual construction and use of the qualified sealant: 1. Because the softening point of the sealant is high, it is difficult to melt during construction, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J195/00C09J11/04C09J11/08
CPCC08K2003/265C08L2201/08C08L2205/035C09J11/04C09J11/08C09J195/00C08L53/02C08L91/00C08L21/00C08K3/346C08K3/26
Inventor 张自鹏
Owner 河南公路卫士交通科技有限公司
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