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A high-strength pavement functional material for laying stress-absorbing belts

A technology of stress-absorbing belts and functional materials, which can be applied to cohesive pavement paved on site, building insulation materials, buildings, etc., can solve the problems of high low-temperature brittleness, high temperature, and loss of stress absorption, etc., and achieve long-term performance stability of materials. Wide source of materials, good protective effect

Active Publication Date: 2016-08-24
SHANXI PROVINCIAL RES INST OF COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the overlaying of asphalt mixture, the temperature is as high as 135°C to 165°C, and the stress-absorbing zone is easily softened by heat. During the compaction process of the overlay layer, it is pushed and the thickness decreases, making it difficult for the stress-absorbing zone to play its due role.
In addition, conventional stress-absorbing belt materials are brittle at low temperatures, and are prone to brittle failure in ice and snow environments, losing the effect of stress absorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high-strength pavement functional material for paving stress-absorbing belts, made of the following raw materials in parts by weight: 100 parts of asphalt, 6 parts of thermoplastic styrene-butadiene rubber (SBS), 0.5 parts of polyphenylene ether, and epoxidized natural rubber 20 servings, 3 servings fiber.

[0035] The preparation method of the high-strength pavement functional material used for paving the stress-absorbing belt according to the raw material formula of this embodiment comprises the following steps:

[0036] Step 1. Heat 100 parts by weight of asphalt to a molten state of 110-120°C, then weigh 6 parts by weight of thermoplastic styrene-butadiene rubber (SBS) and add it to the molten asphalt, raise the temperature of the asphalt to 150-160°C, and use high-speed shear Cut the instrument and carry out low-speed shearing (rotating speed is 1000 rpm) for 10 minutes, for the SBS and asphalt to be fully mixed, then increase the shear rate (rotating speed is 40...

Embodiment 2

[0041] A high-strength pavement functional material for paving stress-absorbing belts, made of the following raw materials in parts by weight: 100 parts of asphalt, 12 parts of thermoplastic styrene-butadiene rubber (SBS), 1.5 parts of polyphenylene ether, and epoxidized natural rubber 30 servings, 5 servings fiber.

[0042] Except for the difference in the raw material formula, the preparation method of the high-strength pavement functional material used for paving the stress-absorbing belt in this example is the same as that in Example 1.

Embodiment 3

[0044] A high-strength pavement functional material for paving stress-absorbing belts, made of the following raw materials in parts by weight: 100 parts of asphalt, 9 parts of thermoplastic styrene-butadiene rubber (SBS), 1 part of polyphenylene ether, and epoxidized natural rubber 25 servings, 4 servings fiber.

[0045] Except for the difference in the raw material formula, the preparation method of the high-strength pavement functional material used for paving the stress-absorbing belt in this example is the same as that in Example 1.

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Abstract

The invention belongs to the technical field of pavement material engineering, and particularly discloses a high-strength pavement functional material for laying a stress absorption band. The material is prepared from the following raw materials in parts by weight: 100 parts of asphalt, 6-12 parts of thermoplastic styrene-butadiene rubber (SBS), 0.5-1.5 parts of polyphenylether, 20-30 parts of epoxidized natural rubber and 3-5 parts of fiber. The high-strength pavement functional material has the advantages of high tensile strength, favorable bonding power with the pavement structural layer, temperature change resistance, simple construction process and the like, has favorable effects for treating old cement concrete pavement cracks and asphalt pavement cracks and preventing crack reflection when being used in cement concrete pavement modification combined pavement engineering and asphalt pavement laying engineering, and has important meanings for enhancing the service life and roadability of the combined pavement.

Description

technical field [0001] The invention relates to the technical field of road material engineering, in particular to a high-strength road surface functional material used for paving stress-absorbing belts. Background technique [0002] Since the 21st century, the mileage of highways in my country has been increasing day by day, among which the total mileage of expressways has jumped to the second place in the world. The national highway network has basically been formed, and the transportation infrastructure is gradually shifting from the construction stage to the maintenance and renovation stage. During the reconstruction of old roads, the main problems of cement concrete pavement are water damage caused by cracking and driving comfort. However, the tensile strength of asphalt concrete is low, and the cracking of the overlay asphalt mixture caused by the crack reflection of the bottom slab is very obvious. Similarly, there are also cracks in asphalt pavement in areas with hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L71/12C08L15/00C08K7/14E01C7/26
Inventor 刘志胜朱晓斌刘志岗
Owner SHANXI PROVINCIAL RES INST OF COMM
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