Super-adhesive composite modified emulsified asphalt and preparation method thereof

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...

Examples

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%.

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...

Examples

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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