SU1310361A1 - Method for asphalt concrete regeneration - Google Patents

Description

The invention relates to road building materials and can be used in the construction and repair of asphalt concrete pavements.

There is a method of regenerating asphalt concrete by introducing emulsion into it.

The closest in technical essence and the achieved result is a method of regenerating asphalt concrete by plasticizing it with liquid black in a binder — a waste of oil products with a density of less than 1 ton / m in an amount of 15–20% of the mass of binder in asphalt concrete. This waste is obtained from oil treatment plants for industrial wastewater.

A disadvantage of the known methods is the low heat resistance of the asphalt concrete obtained.

The purpose of the invention is to increase the heat resistance of the resulting asphalt, while maintaining high corrosion resistance.

This goal is achieved by the fact that according to the method of asphalt concrete regeneration by its plasticization, the latter is carried out 0.1-1% of the weight of asphalt concrete with used engine oil containing alkaline earth metal salts of sulfonic acids.

These salts are a metal-organic additive to petroleum oil and are contained in it in an amount of 8-14%. They are represented by calcium and barium sulfonates, zinc and barium salts of dialkyl dithiophosphoric acid, etc.

Used waste engine oil brand. IMO.

2.4 5.6

An organometallic additive imparts activity to used engine oil. Being a surfactant, when mixing a plasticizer with an asphalt concrete mixture, it provides for chemisorption interaction of the oil with the surface of mineral particles uncoated with bitumen. As a result, the proportion of dry and mixed contacts is reduced in the system, which leads to an increase in the compactibility of the mixture.

The amount of plasticizer added depends on the porosity of the asphalt concrete to be regenerated and the degree of aging of the asphalt concrete asphalt. The minimum amount of plasticizer is introduced with a slight porosity of asphalt concrete (2-3%) and a short service life of the coating (4-7 years), and the maximum - with a high porosity of asphalt concrete (more than 5%) and a significant service life of the coating (more than 10 years).

Example. Asphalt concrete pavement, which has been in operation for 16 years, is heated and milled with the help of a hot milling machine. The used engine oil is introduced into the mixture and mixed.

The properties of the asphalt concrete prepared according to the proposed and known methods are presented in the table.

The data show that asphalt, prepared by the proposed method has a high heat resistance compared to asphalt, obtained by a known method, while maintaining corrosion resistance.

0.8

3.7

0.5 3.3

ABOUT

Water resistance coefficient

Editor M.Nedoluzhenko

Compiled by T. Bikbulatova

Tehred I.Popovich Proofreader I.Erdeyi

Order 1862/22

Circulation 588 Subscription

BNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d. 4/5

Production and printing company, Uzhgorod, Projecto st., 4

7.0

6,6

6.3

1.00

0.86

0.78

Claims (1)

METHOD FOR REGENERATING ASPHALT CONCRETE by plasticizing it, characterized in that, in order to increase heat resistance while maintaining high corrosion resistance, plasticization is carried out by 0.1-1% by weight of asphalt concrete with waste motor oil containing alkaline earth metal salts of sulfonic acids. DOF ABOUT DOF ABOUT The organometallic additive gives activity to used engine oil. Being a surfactant, when mixed with a plasticizer and an asphalt mix, it provides chemisorption interaction of the oil with the surface of mineral particles uncovered with bitumen. As a result, the fraction of dry and mixed contacts in the system decreases, which leads to an increase in the compaction of the mixture. The amount of plasticizer to be added depends on the porosity of the regenerated asphalt concrete and the degree of aging of the binder in the asphalt concrete. The minimum amount of plasticizer is introduced with insignificant porosity of asphalt concrete (2-3%) and a short service life of coated (4-7 years), and the maximum - with a high porosity of asphalt concrete (more than 5%) and a significant service life of the coating (more than 10 years). '' Example. An asphalt concrete pavement that has been used for 16 years is heated and milled using a hot milling cutter. Used engine oil is added to the mixture and mixed. The properties of asphalt concrete prepared by the proposed and known methods are presented in the table. 35 The data show that the asphalt prepared by the proposed method has high heat resistance compared to asphalt obtained by the known method, while maintaining corrosion resistance.