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Asphalt composition and its preparing method

A kind of asphalt composition and polymer technology, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of not taking into account the timing of adding the swelling stabilizer and the reaction time, prolonging the swelling time, etc.

Active Publication Date: 2007-06-27
HEILONGJIANG CHANGHE CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing technology also involves the selection of base asphalt, the type of polymer, and the influence of molecular weight on the modification effect. The importance of the swelling process for the uniform dispersion of the polymer is also considered in the production process. However, for more stringent high and low temperature performance and resistance Asphalt compositions with fatigue performance, the prior art does not involve in-depth specific index requirements for base asphalt, as well as related polymer types, combinations and dosages, nor does it take into account that if more polymers are to be swelled in asphalt, they must be simultaneously Add a corresponding amount of aromatic-rich substances to the system, and prolong the swelling time appropriately. At the same time, the prior art does not sufficiently consider the timing of swelling, the timing of adding stabilizers, and the reaction time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] First, No. 70 petroleum asphalt with a mass percentage of 79.7% is heated to 175-185 ° C to a fluid state, and 10% reverse sequence furfural is added successively to extract oil and 10% polymer (the polymer includes 40% star type SBS and 60% linear SBS), and then grind by a colloid mill with a rotating speed of 2500RPM, then swell under stirring for 6 hours, then add 0.3% sulfur powder, and react for another 4 hours to obtain an asphalt composition product.

Embodiment 2

[0037] First, No. 90 petroleum asphalt with a mass percentage of 79.8% is heated to 175-185°C to a fluid state, and 8% reverse furfural extract oil, 3% natural asphalt and 9% polymer (polymerization) are added successively under stirring. The material includes 35% star SBS, 60% linear SIS and 5% styrene-butadiene rubber), then it is ground by a colloid mill with a rotation speed of 3000RPM, then swelled for 5 hours under stirring, and then added 0.1% organic poly The sulfide and 0.1% metal oxide were reacted for another 3 hours to obtain a bituminous composition product.

Embodiment 3

[0039] First, No. 110 petroleum asphalt with a mass percentage of 80.8% is heated to 175-185°C to a fluid state, and 6% of reverse sequence furfural extract oil, 2% of natural asphalt, 2% of diatomaceous earth and 9% polymer (polymer comprises 30% star-shaped SBS, 65% linear SIS and 5% waste rubber powder), is then ground by a colloid mill at 2000RPM, then swelled for 5 hours under stirring, Then add 0.1% organic polysulfide and 0.1% sulfur powder, and react for another 4 hours to obtain asphalt composition product.

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PUM

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Abstract

The asphalt composition consists of petroleum asphalt 70-86 wt%, polymer 8-15 wt%, stabilizer 0.08-0.6 wt%, compatibilizing agent 6-10 wt% and stuffing 0-10 wt%. Its preparation process includes the following steps: heating petroleum asphalt to 175-185 deg.c and to reach flowing state, adding compatibilizing agent, polymer and stuffing successively through stirring, grinding in a colloid mill in the rotation speed of 2000-4000 rpm, swelling through stirring for 2-10, adding stabilizer and reacting for 1-5 hr to obtain the product. The asphalt composition has high stability at high temperature, high flexibility at low temperature and high elasticity restoring capacity, and is used in the antiscour layer of semi-rigid cement concrete road and the antifatigue layer of bridge.

Description

technical field [0001] The invention relates to an asphalt composition and a preparation method thereof. The composition of the invention is specially used for the waterproof and anti-scour layer of the semi-rigid base cement concrete pavement and the waterproof and anti-fatigue layer of the bridge surface. Background technique [0002] The application of polymers in asphalt compositions for various purposes has been very common, including polyethylene PE, ethylene vinyl acetate copolymer EVA, natural rubber NR, styrene-butadiene latex SBR or styrene-based block copolymers, etc., these polymers Dispersed into asphalt can improve the high and low temperature performance of asphalt and asphalt mixture and prolong the service life of the road surface, so it is widely used. Among them, the styrene block copolymer has a better effect on comprehensively improving various properties of asphalt, so that it It is gradually becoming the most important polymer used for asphalt modifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00E01C7/35C08L53/00
Inventor 侯芸戴建华
Owner HEILONGJIANG CHANGHE CHEM CORP
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