High-viscosity spraying type SBS modified emulsified asphalt and preparing method thereof

Abstract

High-viscosity spraying type SBS modified emulsified asphalt is made from matrix asphalt, an SBS modifier, a viscosity reducer, a cationic emulsifier, a stabilizer, hydrochloric acid and water according to a certain weight ratio. The method for preparing the high-viscosity spraying type SBS modified emulsified asphalt comprises the steps of (1) heating the matrix asphalt, adding the SBS modifier, stirring the mixture, evenly dispersing the SBS modifier into the matrix asphalt through high-speed shearing, and obtaining SBS modified asphalt; (2) heating the SBS modified asphalt, adding the viscosity reducer, evenly dispersing the viscosity reducer to the SBS modified asphalt through high-speed shearing, and obtaining SBS modified asphalt for emulsification; (3) placing the SBS modified asphalt for emulsification in an asphalt tank of an emulsification device for emulsification; (4) adding the cationic emulsifier, the viscosity reducer and water in a liquid soap tank of the emulsification device to obtain liquid soap; (5) adding hydrochloric acid and heating the liquid soap; (6) conducting colloid mill emulsification and pressure cooling on the SBS modified asphalt for emulsification and liquid soap in the liquid soap tank. The high-viscosity spraying type SBS modified emulsified asphalt is high in asphalt content and stability, and a thick asphalt membrane is generated after demulsification.

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 high-viscosity spraying type SBS 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 main technical and quality problems common to asphalt concrete pavement. One is poor durability. At present, the longest service life of asphalt concrete pavements 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 opening, an...

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Problems solved by technology

[0008] Chinese patent literature [CN102040846A] discloses "an oil-resistant asphalt pavement material and its preparation method", and proposes the use of SBS, EVA, polymer wax, cross-linked The oil-resistant modified asphalt is prepared by using additives. The modified asphalt has excellent high-temperature performance 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 for normal-temperature construction. Upgrade and maintenance requirements for road surfaces (bridge decks) such as cold mix, slurry seal, viscous oil, and penetrating oil

[0009] Chinese patent document [CN100362053C] discloses a kind of "composite modified emulsified asphalt and its preparation method of stone chip seal layer", which utilizes modifier Sasobit, SBR latex Improve high temperature and low temperature performance at the same time, but like the aforementioned SBR latex, generally more than 30% of it is non-SBR rubber, which has high cost, and the improvement effect on modified emulsified asphalt is not as good as SBS; at the same time, the emulsifier is INDULIN DF42, INDULIN DF62 fast-cracking emulsification agent for chip sealing

[0010] Chinese patent literature [CN100355834C] discloses "a kind of SBS modified emulsified asphalt and its preparation method", which uses Sasobit and SBS to improve emulsification temperature and high temperature performance at the same time and low temperature performance, but Sasobit product price is high, the production cost is high, and Sasobit has great damage to low temperature performance; at the same time, its emulsifier is MQK-1M, MQK-MQ3 and other slow cracking emulsifiers, which belong to BCR modified emulsified asphalt , can only be used for cold mixes such as micro-surfacing, slurry seals, etc., not for seals, sticky layers, etc.

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