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Bitumen compositions and preparation method thereof

A technology of asphalt composition and polymer, which is applied in the direction of building structure, building components, building insulation materials, etc., and can solve the problems of insufficient research on modified emulsified asphalt

Inactive Publication Date: 2010-03-24
CHECC HIGHWAY MAINTENANCE & TEST TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the prior art, the research on modified emulsified asphalt that has higher performance requirements and can meet the needs of special applications is not deep, and it is specially used for high-grade highway synchronous crushed stone seal layer wear layer binder or synchronous construction of asphalt concrete overlay adhesive layer The modified emulsified asphalt material has not been involved in the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of modified asphalt: heating No. 90 petroleum asphalt with 89.1% mass percentage to 175~185°C to a fluid state, adding 7% reverse sequence furfural to extract oil and 3.8% polymer ( The polymer comprises 40% star-shaped SBS and 60% linear SBS), then through the colloid mill grinding at 2500RPM, then swelled under stirring for 4 hours, then added 0.1% sulfur powder, and reacted for 3 hours to prepare Dede modified asphalt;

[0043] (2) Soap liquid preparation: be 0.9% emulsifying agent (emulsifying agent comprises 30% cetyl dimethyl hydroxyethyl ammonium chloride, 30% 1-aminoethyl-2-tetradecyl ~ octadecyl imidazoline, 30% nonylphenol ethoxylate NP-7, 5% isopropanol and 5% water), 0.15% calcium chloride, 0.03% hydroxypropyl methylcellulose Add plain and 0.03% sepiolite to water at a temperature of 40-60°C, add the water to 100%, adjust the pH value of the soap solution to 1.5-2.5 with concentrated hydrochloric acid, and stir evenly to obtain a soap soluti...

Embodiment 2

[0046] (1) Modified asphalt preparation: the No. 110 petroleum asphalt that is 87.06% by mass is heated to 175~185 ℃ to flow state, add 8.5% reverse sequence furfural to extract oil successively, 4.3% polymer ( The polymer comprises 35% star-shaped SBS and 65% linear SBS), then through the colloid mill grinding of 3000RPM, then swelled under stirring for 5 hours, then added 0.06% organic polysulfide and 0.08% Sulfur powder was reacted for 3.5 hours to obtain modified asphalt;

[0047] (2) Soap liquid preparation: be 1% emulsifier (the emulsifier comprises 35% cetyl dimethyl hydroxyethyl ammonium chloride, 30% octadecyl propylene diamine, 25% emulsifier) % of octylphenol ethoxylate OP-10, 5% of acetone and 5% of water), 0.18% of ammonium chloride, 0.03% of sodium carboxymethylcellulose and 0.02% of meerschaum were added to the temperature In water at 40-60°C, add the water to 100%, adjust the pH of the soap solution to 1.5-2.5 with concentrated hydrochloric acid, stir evenly, ...

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Abstract

An asphalt composite and its production are disclosed. The composite consists of modified asphalt 63-70 wt% and soap liquid 30-37 wt%; the modified asphalt contains petroleum asphalt 84-92 wt%, polymer 3.5-5 wt%, stabilizer 0.05-0.2 wt%, compatible agent 4-10 wt% and filler 0-3 wt%; the soap liquid contains 0.8-1.5 wt% emulsifier, 0.1-0.2 wt% emulsion stabilizer, thickening agent 0.03-0.06 wt% andwater 100%. The pH value is adjusted to 1.5-2.5 by concentrated sulfuric acid. The process is carried out by: preparing modified asphalt, preparing soap liquid, and emulsifying. The evaporating residue content is 63-70 wt%, demulsifying rate is less than 40% and evaporating residue softening point is equal to or greater than 60 deg. C.

Description

technical field [0001] The invention relates to an asphalt composition and a preparation method thereof, in particular to an emulsified modified asphalt and a preparation method thereof, belonging to the technical field of asphalt modification and emulsification processing, and the composition of the invention is suitable for synchronous gravel seal wear layer Adhesive material or simultaneous construction asphalt concrete overlay adhesive layer material. Background technique [0002] Emulsified asphalt has been widely used as a bonding material in pavement engineering, and has many advantages such as convenient construction, reduced energy consumption, reduced pollution, and extended construction period. However, ordinary emulsified asphalt has disadvantages such as strong temperature sensitivity, poor cohesiveness, and poor flexibility, and cannot meet the requirements of high-grade asphalt pavement for bonding materials. [0003] A variety of modified emulsified asphalts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K5/42C08L53/00C08K5/23C08K3/06
Inventor 戴建华侯芸
Owner CHECC HIGHWAY MAINTENANCE & TEST TECH CO LTD
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