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Asphalt cement for high-strength micro-surfacing capable of rapidly opening traffic

A technology for open traffic and asphalt glue, applied in building insulation materials, building components, buildings, etc., can solve the problems of high requirements for emulsifiers, unattainable open traffic time, slow cracking and fast setting of emulsified asphalt, etc., to improve construction efficiency. and road performance

Pending Publication Date: 2018-03-09
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of replacing SBR with SBS modifier is often used, but because SBS is used as a modifier in the micro-surface cement, the requirements for emulsifiers are relatively high, and it is difficult for general emulsifiers to emulsify SBS modified asphalt smoothly
A better way is to emulsify the base asphalt first, and then add SBS, but SBS will segregate to a certain extent during transportation and use after mixing, and it is difficult to maintain stability
Therefore, the performance of the SBS-modified micro-surface binder is sometimes good and sometimes bad, and the pavement after construction is often partially damaged
Some other patented technologies propose that by replacing the emulsifier, the emulsified asphalt can achieve the effect of slow cracking and fast setting, so as to realize the purpose of opening up to traffic as soon as possible after the construction is completed, but usually the opening time for traffic cannot reach within 1 hour

Method used

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  • Asphalt cement for high-strength micro-surfacing capable of rapidly opening traffic
  • Asphalt cement for high-strength micro-surfacing capable of rapidly opening traffic
  • Asphalt cement for high-strength micro-surfacing capable of rapidly opening traffic

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preparation example Construction

[0028] Its preparation method comprises the following steps:

[0029] 1. Preheat 50-66 parts by weight of road petroleum asphalt under the condition of 130-140°C for use, the time is not limited, 30-120 minutes is recommended, and the asphalt is flowing;

[0030] 2. Mix 1-3 parts by weight of quaternary ammonium salt type cationic imidazoline surfactant with 30-46 parts by weight of water to prepare soap liquid, and control the temperature during the preparation process at 50-80°C;

[0031] 3.2-4 parts by weight of styrene-ethylene-propylene-styrene block copolymer (SEPS), at a temperature of 130-150 ° C, put into the asphalt in step 1, at a speed of 2000-3000 rpm Cut for 20-30 minutes;

[0032] 4. Add the soap solution in step 2 into the emulsified asphalt machine, and undergo mechanical action such as pressurized shearing and grinding to generate a new type of modified emulsified asphalt. The output temperature of the modified emulsified asphalt should be controlled between...

Embodiment 1

[0035] 1. Place 55 parts by weight of No. 70 base asphalt in an oven at 135°C to keep warm and preheat for 60 minutes; 2. Mix 2 parts by weight of quaternary ammonium salt cationic imidazoline surfactant with 40 parts by weight of water Mix to prepare a soap solution, the temperature of the preparation process is controlled at 50-80°C; 3.2 parts by weight of styrene-ethylene-propylene-styrene block copolymer (SEPS) are put into the asphalt in step 1, At a temperature of 135°C, shear at a speed of 3000 rpm for 30 minutes; 4. Add the soap solution in step 2 to the emulsified asphalt machine, and undergo mechanical action such as pressurized shearing and grinding to generate a new type of modified emulsified asphalt , the output temperature of the modified emulsified asphalt should be controlled at 90±2°C; 5. Mix 0.5 parts by weight of isocyanate and 0.5 parts by weight of Guerbet alcohol at room temperature and stir evenly, and put them in 2 hours before construction into the mo...

Embodiment 2

[0042] 1. Place 50 parts by weight of No. 70 base asphalt in an oven at 135°C to keep warm and preheat for 60 minutes; 2. Mix 2 parts by weight of quaternary ammonium salt type cationic imidazoline surfactant with 43 parts by weight of water Mix and prepare soap liquid, the temperature of the preparation process is controlled at 50-80°C; 3.3 parts by weight of styrene-ethylene-propylene-styrene block copolymer (SEPS), put into the asphalt in step 1, At a temperature of 135°C, shear at a speed of 3000 rpm for 30 minutes; 4. Add the soap solution in step 2 to the emulsified asphalt machine, and undergo mechanical action such as pressurized shearing and grinding to generate a new type of modified emulsified asphalt , the output temperature of this modified emulsified asphalt should be controlled at 90±2°C; 5. Mix 1 part by weight of isocyanate and 1 part by weight of Guerbet alcohol at room temperature and stir evenly, and put them into the place 2 hours before construction into ...

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Abstract

The invention discloses asphalt cement for high-strength micro-surfacing capable of rapidly opening traffic. Calculated according to 100 parts by weight, the asphalt cement comprises 50-66 parts of pavement petroleum asphalt, 1-3 parts of a quatemary ammonium salt positive ion imidazoline surfactant, 2-4 parts of a styrene-ethylene-propylene-styrene segmented copolymer, 30-46 parts of water, 0.5-1part of isocyanate and 0.5-2 parts of one or more types of Guerbet alcohol of which the total number of carbon atoms is 16-24. The micro-surfacing obtained by the asphalt cement is capable of openingthe traffic within 30 min after completing the pavement, so the good construction performance can be kept, and the properties of the conventional micro-surfacing, such as early strength, later anti-fatigue, water damage resistance and high-temperature track resistance, are greatly improved.

Description

technical field [0001] The technology involved in the present invention belongs to the category of pre-maintenance of road pavement engineering, and proposes a high-strength micro-surface asphalt binder that can be quickly opened to traffic. Under reduced conditions, open traffic time is significantly shortened, and early and late road performance is improved. Background technique [0002] The micro-surfacing technology is a thin layer construction technology of cold mix mixture with polymer modified emulsified asphalt as the binder. In foreign countries, micro-surfacing technology has been widely used in the maintenance of expressways, and the cost is about 1 / 3 of the hot asphalt overlay of the same thickness, and it has been proved to be a maintenance measure with high cost performance; it has good performance Anti-slip and water-sealing effects, solid and flat, and has the characteristics of fast construction speed, fast forming, and short construction period. It can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/41
CPCC08L95/005C08L2201/08C08L53/025C08K5/41
Inventor 黄明温学钧韩明史春华薛道锐
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP