Abstract. Three commercial road emulsions on the basis of petroleum bitumens differing by their production method (oxidated, distillation and modified bitumens) and Redicote E-11 emulsifier were obtained. The obtained emulsions were used for the production of Slurry Seal and thin-layer road coatings on its basis. The coatings based on modified oxidated bitumen have more advantages compared with those based on oxidated bitumen. The expensive distillation bitumen may be exchanged for modified oxidative one to use it in a Slurry Seal technology. We propose to use the indene-coumarone resin for oxidated bitumen modification to improve its adhesive and cohesive properties.

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In this article the cationic bitumen emulsions are characterized-as popular binder for various road emulsions. There are considered the specific features of cationic bitumen road emulsions' formulations. There are presented the functions and specificities of the acids application in cationic bitumen road emulsions. The literary review is presented on potentialities of ortho-phosphoric acids application instead of the traditional hydrochloric acid. Chemical peculiarities of application are presented (as well as advantages and drawbacks of application)-for both the traditional hydrochloric acid and forward-looking ortho-phosphoric acid. As the advantages of ortho-phosphoric acid application for cationic bitumen road emulsions one can mention: simple replacement of acid in soap solution preparation, less corrosive acid, higher pH emulsions, acid is easier to store, fewer fumes, not regulated in some countries, unlike hydrochloric acid. The potentialities are considered for application of ortho-phosphoric acid, as an effective component of cationic bitumen emulsion for application in various bitumen emulsion technologies, including the technologies for making protective slurry road pavements, among which the most widespread application was found by ortho-phosphoric acid in special fast-setting Slurry Surfacing systems, which possess a number of advantages over the same systems based on hydrochloric acid. The main of those advantages are as follows: such application eliminates the need for acid dopes in bitumen, provides a quick-traffic slurry system that works in cooler temperatures and at night, no need to change the usual latex or SBS grades, can use normal break retarders, mix controllable with cement in the field.

In this article the study is done for the adhesion of aggregates coming from various granite quarries of Ukraine with bituminous binder, namely with bitumen emulsion – for application in surface dressing technology for road pavements treatment. In the article there are used the Ukrainian and European testing methods for determination of adhesion in the “bitumen – aggregate” system. According to the Ukrainian method, there was determined the adhesion of residual binder with the chips surface after boiling in the distilled water and in the solution of glycerin and distilled water. As the European method, for the studies there was used Vialit Plate Shock Test. There were developed three bitumen emulsion formulations.

This article is devoted to development and production (on a lab emulsion plant) of six compositions of slow-setting bitumen emulsions for a slurry-surfacing mix. An aggregate composition for Type 1 (0-5 mm) and Type 3 (0-15 mm) slurry-surfacing mixes was determined and selected. Results of the slurry surfacing mix composition selected by the criteria of a mixture decay, cohesion strength build-up rate and material loss by wet track abrasion testing-on the basis of bitumen emulsions produced from both distilled and oxidized bitumen, using various emulsifiers and both hydrochloric and orthophosphoric acids, are presented in the article. Advantages of using slurry-surfacing mixes based on emulsion produced with orthophosphoric acid and Redicote C-320Е emulsifier were proved. Such a system either minimizes or eliminates in its composition the use of the mixture decomposition regulator and reduces the content of Portland cement. The application of such a system makes it possible to produce slurry surfacing mix on the basis of low acid oxidized bitumen made from light petroleum and rock material through the criterion of the total surface activity determined by methylene blue with high rates of mix curing, and consequently the transport rapid start on the arranged thinlayer coating. Besides, the wet track abrasion indices of this system are substantially lower than in traditional system on oxidized bitumen, and even lower in comparison with the system on distilled bitumen.