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Super-adhesive composite modified emulsified asphalt and preparation method thereof

A technology of emulsified asphalt and composite modification, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of inability to apply upgrades and maintenance requirements, production difficulties, high production costs, etc., achieve good application prospects, simple production process, Good emulsifying effect

Inactive Publication Date: 2016-04-13
XIAN HIGHWAY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SBR modified emulsified asphalt adopts styrene-butadiene rubber, which has obvious improvement effect on low temperature performance, but not obvious improvement on high temperature performance, poor storage stability, and the rubber content in SBR latex is generally about 65%, contains a lot of water, and the production cost is high. ; In terms of performance, SBS modified emulsified asphalt is better than SBR modified emulsified asphalt
SBS modified emulsified asphalt has better bonding performance and high temperature performance, but it is more difficult to produce
[0005] Chinese patent document [CN102040846A] discloses "an oil-resistant asphalt pavement material and its preparation method", and proposes the use of SBS, EVA, polymer wax, and cross-linking agent to prepare oil-resistant modified asphalt. The high-temperature performance of the modified asphalt is and low-temperature performance, but it is only used for high-temperature construction, and does not have the advantages of safety, energy saving, and environmental protection of normal temperature construction. Upgrade and maintenance requirements of pavement (bridge deck) such as layers of oil
[0006] Chinese patent literature [CN100355834C] discloses "a kind of SBS modified emulsified asphalt and its preparation method", which adopts Sasobit and SBS to simultaneously improve emulsification temperature, improve high temperature performance and low temperature performance, but Sasobit product price is high, production cost is high, and Sasobit has great damage to low temperature performance; at the same time, its emulsifiers are slow-cracking emulsifiers such as MQK-1M and MQK-MQ3, which belong to BCR modified emulsified asphalt, and can only be used for cold mixes such as microsurfacing and slurry Sealing layer, etc., cannot be used for sealing layer, adhesive layer, etc.

Method used

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  • Super-adhesive composite modified emulsified asphalt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] A super viscous composite modified emulsified asphalt, comprising the following components by weight percentage: base asphalt 52%, SBS modifier 2%, viscosity reducer 1%, cationic emulsifier 1%, hydrochloric acid 0.5%, water 42% , SBR modifier 1.5%;

[0029] The base asphalt is one or more mixtures of road petroleum asphalts with a penetration of 60-150 mm;

[0030] The SBS is a linear structure with a weight average molecular weight of 80,000 to 150,000;

[0031] The viscosity reducer is lignosulfonate.

[0032] The cationic emulsifier is BE-2.

[0033] The effective content of the SBR modifier is 40%.

Embodiment 2

[0035] A super viscous composite modified emulsified asphalt, comprising the following components by weight percentage: 53% of base asphalt, 1.5% of SBS modifier, 1% of viscosity reducer, 1% of cationic emulsifier, 0.5% of hydrochloric acid, and 41% of water , SBR modifier 2%;

[0036] The base asphalt is No. 70 asphalt with a penetration of 70 to 80 mm or No. 90 asphalt with a penetration of 90 to 100 mm;

[0037] The SBS is a linear structure with a weight average molecular weight of 80,000 to 150,000;

[0038] Described viscosity reducer is GGX-1.

[0039] The cationic emulsifier is MQK-1M.

[0040] The effective content of the SBR modifier is 40%.

Embodiment 3

[0042] A super viscous composite modified emulsified asphalt, comprising the following components by weight percentage: base asphalt 52%, SBS modifier 1.5%, viscosity reducer 0.5%, cationic emulsifier 1%, hydrochloric acid 0.5%, water 42% , SBR modifier 2.5%;

[0043] The base asphalt is No. 70 bitumen with a penetration of 60-80 mm or No. 90 bitumen with a penetration of 80-100 mm;

[0044] The SBS is a linear structure with a weight average molecular weight of 100,000 to 150,000;

[0045] Described cationic emulsifier is GNN-R;

[0046] The effective content of the SBR modifier is 40%.

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Abstract

Super-adhesive composite modified emulsified asphalt is prepared from matrix asphalt, SBS modifier, viscosity reducer, cationic emulsifier, hydrochloric acid, water and SBR modifier. The method includes the steps of firstly, heating matrix asphalt, adding SBS modifier to be stirred, evenly dispersing SBS modifier in matrix asphalt, and preparing SBS modified asphalt; secondly, heating SBS modified asphalt, adding viscosity reducer, dispersing viscosity reducer to SBS modified asphalt, and preparing SBS modified asphalt used for emulsification; thirdly, placing SBS modified asphalt which is prepared in the second step and used for emulsification in an asphalt tank of an emulsification device to be emulsified; fourthly, adding cationic emulsifier and water into a liquid soap tank of the emulsification device to prepare liquid soap; fifthly, adding concentrated hydrochloric acid to heat liquid soap; sixthly, emulsifying SBS modified asphalt used for emulsification and liquid soap in the liquid soap tank through a colloid mill; seventhly, externally adding SBR modifier to be mixed with emulsification asphalt at a normal temperature for secondary modification. Composite modification is conducted through SBS and SBR modifier, the emulsified asphalt is good in stability, and viscosity of asphalt generated after demulsification is large.

Description

technical field [0001] The invention belongs to the technical field of road engineering modified emulsified asphalt and its processing and application, and in particular relates to a super-viscous composite modified emulsified asphalt and a preparation method thereof. Background technique [0002] According to relevant statistics, the cost of asphalt concrete pavement accounts for 1 / 4 to 1 / 3 of the total road construction cost, and most of the maintenance funds are used for pavement. There are two common technical and quality problems of asphalt concrete pavement. One is poor durability. At present, the longest service life of asphalt concrete pavement in China is 8 to 12 years, which is generally shorter than the designed service life of 15 to 20 years. The second is that the early damage to the road surface is serious. Some new roads need to be repaired due to pits, cracks, rutting, and insufficient anti-skid performance within 1 to 3 years after the opening of some new ro...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/06
CPCC08L95/005C08L2205/03C08L53/02C08L9/06
Inventor 弓锐弥海晨韩瑞民马志刚郭彦强徐鹏祁峰
Owner XIAN HIGHWAY INST
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