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Modified road asphalt and preparation method thereof

A road asphalt and modification technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of poor high temperature resistance, high SBS seepage, poor waterproofness, etc., and achieve enhanced heat storage performance and temperature resistance. , Prevent road cracking and enhance the effect of firmness

Active Publication Date: 2011-06-15
BEIJING EURO & AMERICAN INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of SBS with asphalt, it is difficult to produce qualified asphalt
Moreover, the viscosity of modified asphalt is relatively high, and it is difficult to pave and pave the road.
The amount of SBS permeation required to reduce the amount of sulfur (0.015-0.075%) is very high, resulting in high cost, and the stability and storage performance of this modified asphalt are not very good
The disadvantage of paraffin-modified asphalt with paraffin wax is that the low-temperature performance of modified asphalt is not good, so its use is greatly limited
Clay and other mineral modification: asphalt materials modified with kaolinite, diatomaceous earth, sulfur, etc. can significantly prolong the life of the road, but there are still disadvantages such as decreased shear force of modified asphalt materials
Modification of waste rubber materials: asphalt materials modified with waste rubber powder, this material can realize the reuse of waste, and is more suitable for paving and irrigation of bridge deck roads, but there are still problems such as easy cracking, poor water resistance, and poor high temperature resistance and other shortcomings
[0003] There are some shortcomings in the above modification methods, and the performance of modified asphalt is not comprehensive.

Method used

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  • Modified road asphalt and preparation method thereof
  • Modified road asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In the reaction tank, first heat 80kg of asphalt to 110°C until it is dissolved and flowable, then add 15kg of SBS, 1kg of waste tire rubber powder and 3.5kg of polyethylene glycol into the asphalt, stir and mix for 2 hours, after uniform mixing, add Sulfur 0.5kg, continue to stir, after above-mentioned mixed material mixes evenly, stop stirring, place 2 hours at 150 ℃, make cross-linking reaction complete, then cool down, obtain the modified road asphalt product 1 of the present invention.

Embodiment 2

[0016] In the reaction tank, first heat 85kg of asphalt to 130°C until it is dissolved and flowable, then add 10kg of SBS, 0.5kg of waste tire rubber powder and 4kg of polyethylene glycol into the asphalt, stir and mix for 2 hours, after uniform mixing, add Sulfur 0.5kg, continue to stir, after above-mentioned mixed material mixes evenly, stop stirring, place 2 hours at 150 ℃, make cross-linking reaction complete, then cool, obtain the modified road asphalt product 2 of the present invention.

Embodiment 3

[0018] In the reaction tank, first heat 83kg of asphalt to 130°C until it is dissolved and flowable, then add 11kg of SBS, 0.5kg of waste tire rubber powder and 3.8kg of polyethylene glycol into the asphalt, stir and mix for 2 hours, and after uniform mixing, Add 0.2 kg of sulfur and continue stirring. After the mixture is uniformly mixed, stop stirring and place it at 150° C. for 2 hours to complete the cross-linking reaction, then cool to obtain the modified road asphalt product 3 of the present invention.

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Abstract

The invention discloses modified road asphalt and a preparation method thereof. The modified road asphalt consists of an asphalt substrate, waste tire rubber powder, a copolymer, a cross linking agent and a phase change modifier. The recycling of wastes is fully realized, and the defects of easiness in cracking and poor thermal stability of asphalt obtained by modifying and mixing the ordinary waste tire rubber powder are overcome because the phase change modifier is added. The cross linking agent is added, so that the stability of the asphalt is greatly enhanced. An effect test indicates that the asphalt has very high pressure resistance and deformation resistance. Waste treatment and material modification are comprehensively considered, so that very good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the field of petrochemical downstream products, and relates to a modified road asphalt and a preparation method thereof. Background technique [0002] The modification of asphalt to improve performance has a history of several decades. In general, there are the following additive modification methods: Adding copolymers: Styrene butadiene triblock copolymer (SBS) is currently commonly used The polymer used to modify the properties of asphalt, wherein the amount of SBS is 2% to 20% of the weight of asphalt, and sulfur is used as a crosslinking agent. However, due to the poor compatibility of SBS and asphalt, it is difficult to produce qualified asphalt. Moreover, the viscosity of modified asphalt is relatively high, and pavement paving and paving are relatively difficult. The amount of SBS permeation required to reduce the amount of sulfur (0.015-0.075%) is very high, resulting in high cost, and the stability and storage perfor...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L71/08C08L53/02C08L21/00C08K3/06
Inventor 车春玲
Owner BEIJING EURO & AMERICAN INST OF SCI & TECH
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