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Foaming modified asphalt composition and preparation method thereof

A technology of modified asphalt and composition, which is applied to building structures, building components, building insulation materials, etc., can solve the problems of high temperature required for asphalt heating and no addition, and save production steps, prevent aging, and simplify the process. Effect

Active Publication Date: 2015-03-25
SHANDONG DASHAN ROAD & BRIDGE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of preparing foamed asphalt still adopts the traditional method of mixing hot asphalt with water and then foaming, and the temperature required for asphalt heating is relatively high
Moreover, no additives that can promote the bonding of asphalt and stone to improve the performance of the mixture were added during the preparation of the mixture.

Method used

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  • Foaming modified asphalt composition and preparation method thereof
  • Foaming modified asphalt composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The foamed modified asphalt composition of the present embodiment comprises 10kg base asphalt and 1.1kg aqueous emulsion, wherein the aqueous emulsion comprises:

[0034] 35wt% styrene-butadiene rubber

[0035] 2 wt% Span-80 emulsifier

[0036] 1 wt% quaternary ammonium surfactant

[0037] 1 wt% silane coupling agent

[0038] 61 wt% water.

[0039] The preparation method of foamed modified asphalt of the present invention comprises the following steps:

[0040] 1) Heat 10kg of base asphalt to 150°C and keep it warm for use;

[0041] 2) Cut the hot base asphalt and 1.1kg of water-based emulsion in step 1) through a colloid mill with dual functions of shearing and grinding, and grind them evenly, and spray out the obtained product under a pressure of not less than 0.4MPa.

Embodiment 2

[0043] The foamed modified asphalt composition of the present embodiment comprises 10kg base asphalt and 1.2kg aqueous emulsion, wherein the aqueous emulsion comprises:

[0044] 38wt% styrene-butadiene-styrene block copolymer (SBS)

[0045] 2 wt% Span-60 emulsifier

[0046] 1 wt% amide surfactant

[0047] 1 wt% aluminate coupling agent

[0048] 58 wt% water.

[0049] The preparation method of foamed modified asphalt of the present invention comprises the following steps:

[0050] 1) Heat 10kg of base asphalt to 160°C and keep it warm for use;

[0051] 2) Cut the hot base asphalt and 1.2kg of water-based emulsion in step 1) through a colloid mill with dual functions of shearing and grinding, grind them evenly, and spray out the obtained product under a pressure of not less than 0.4MPa.

Embodiment 3

[0053] The foamed modified asphalt composition of the present embodiment comprises 10kg base asphalt and 1.0kg aqueous emulsion, wherein the aqueous emulsion comprises:

[0054] 44wt% neoprene

[0055] 4 wt% Span-20 emulsifier

[0056] 1.5 wt% sodium rosinate

[0057] 1.5 wt% titanate coupling agent

[0058] 49 wt% water.

[0059] The preparation method of foamed modified asphalt of the present invention comprises the following steps:

[0060] 1) Heat 10kg of base asphalt to 170°C and keep it warm for use;

[0061] 2) Cut the hot base asphalt and 1.0kg of water-based emulsion in step 1) through a colloid mill with dual functions of shearing and grinding, grind them evenly, and spray out the obtained product under a pressure of not less than 0.4MPa.

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Abstract

The invention relates to a foaming modified asphalt composition. The foaming modified asphalt composition disclosed by the invention comprises 60-130 parts of matrix asphalt, 3-15 parts of waterborne emulsion, wherein the waterborne emulsion is formed by emulsifying 35-65wt% of asphalt modifier, 1-8wt% of emulsifier, 1-2wt% of foam stabilizer, 0.01-3wt% of coupling agent and 23-63% of water. The matrix asphalt and the waterborne emulsion containing the modifier are adopted, asphalt modification is realized when the matrix asphalt is foamed, the foamed modified asphalt has dual characteristics of a foam asphalt material and a modified asphalt material, the production step of modifying the asphalt is saved, the construction temperature of the asphalt mixture is reduced by 30-50 DEG C, and the asphalt mixture is prevented from aging, is superior to hot-mixed modified asphalt mixture and is obviously superior to common foamed asphalt in pavement performance. The modified asphalt equipment investment and production cost are saved, energy conservation and emission reduction are realized, and the process is easy and convenient.

Description

technical field [0001] The invention relates to the modification of road petroleum asphalt, in particular to a method for preparing a foamed modified asphalt composition in which foaming and modification are carried out simultaneously, which is different from the existing high-temperature molten asphalt emulsified and then modified. Background technique [0002] my country's traffic presents the characteristics of large flow, heavy load and channelized traffic. With the increase of road age, asphalt gradually ages, and the anti-rutting ability, crack resistance, fatigue damage resistance, and wear resistance of asphalt concrete gradually weaken. During the use of asphalt pavement, early damage phenomena such as structural damage, severe water damage, severe rutting, and surface cracking are becoming more and more serious. How to choose reasonable and scientific road management and maintenance according to local conditions and prolong the service life of road surfaces has bec...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L9/06C08L11/00C08L53/02C08L23/08C08J9/00
Inventor 陈际江杨树人扈利东樊伟张超
Owner SHANDONG DASHAN ROAD & BRIDGE ENG
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