21-osios jaunųjų mokslininkų konferencijos „Mokslas – Lietuvos ateitis“ teminės konferencijos TRANSPORTO INŽINERIJA IR VADYBA, vykusios 2018 m. gegužės 4-5 d. Vilniuje, straipsnių rinkinys Proceedings of the 21th Conference for Junior Researchers ‘Science – Future of Lithuania’ TRANSPORT ENGINEERING AND MANAGEMENT, 4-5 May 2018, Vilnius, Lithuania Сборник статей 21-й конференции молодых ученых «Наука – будущее Литвы» ИНЖЕНЕРИЯ ТРАНСПОРТА И ОРГАНИЗАЦИЯ ПЕРЕВОЗОК, 4-5 мая 2018 г., Вильнюс, Литва eISBN 978-609-476-138-6 90 © Vilniaus Gedimino technikos universitetas http://jmk.transportas.vgtu.lt FEATURES OF THE PAVEMENTS CONSTRUCTION, CONSTRUCTED WITH THE USE OF SLAG MINERAL MIXTURES Kateryna Krayushkina, Tetiana Khymeryk National aviation Univetsity, Aiports institute, Kyiv, Ukraine E-mail: ekrayushkina15@ukr.net Abstract. In the practice of building of capital types of pavements eventually established the princi- ple of one-time capital investment, according to which the physical and mechanical properties of struc- tural layers to be formed largely under construction and start of operation of the road to take the calcu- lated value. According to this principle calculated characteristics of soil reinforced with inorganic bind- ers, defined in the standard period of solidification, which is taken for 28 days just as is customary dur- ing testing of cement products. It is assumed that after 28 days of hardening of soil samples fortified gaining at least 70% of maximum strength. Consistent implementation of this principle encourages use for strengthening of soil-early type of inorganic binders cement and virtually eliminates the possibility of a wide use for these purposes is slowly hardening of mineral binders which, for example, steel slags. Keywords: pavements construction, steel slags, binders, road, surfaces of soil. Introduction Along with the above technologies coexist in the road opposite principle phasic principle of building local road network nonrigid perish under which technical and quality eksnluatatsiyni pavements gradually improving as the increase in traffic. Consistent implementation of this prin- ciple implies widespread use in road construction waste and by-products industry. Including the reinforcement of soils and intensifying implementation of semi-rigid struc- tural layers of road pavements, constructed using slow hardening of mineral binders. They are distinguished by a gradual increase in the strength characteristics during operation in proportion to traffic growth. To strengthen the soil is recommended to use lime, ash removal TPP, lime-ash and slag lime-slow hardening binder. For regulatory testing time period taken 90 days. The introduction of a new regulatory test duration forti- fied soil approve a functional nature of this indicator, and therefore offers a real prospect for use not only the above- mentioned species of native binding but other potentially active waste and by-products, such as the steel industry. Statement of a problem Considering the long-term positive experience of building bases and surfaces of soil, fortified by steel slag, in the past twenty years, the technique of designing Derzh- dorNDI part shlakohruntovyh mixtures. The basis of this technique is the classification hydraulically active binders and secondary products of the metallurgical industry in terms of estimated lifetime hardening. Experimental test results of samples of cement, slag soil mixtures at different times of hardening indicate that the expected lifetime of hardening (tp) essentially depends on the type of mineral binder varies in a wide range of 28 to 1080 days. To rapidly hardening binders and the first group of slow hardening binders (tp) quantitatively con- sistent with the standard period of testing. Тable 1. Indexes Types binders Quickly- hardening Slow hardening Groups І ІІ III Estimated hardening time, no more days 28 90 360 720 Name of binder Portland- cement and its variety, cement dust Ground Granulated slag (MGS), slag lime binder (SLB), electro fusion (EF) Dump blast furnace slag (DBS) crushed granulated slag (CGS) Granulated slag (GSH) Ferrochromi- um slag (FS) As expected lifetime is not matched with the rhythm of the technological cycle of construction coatings and substrates, it really can not be used in laboratory practice in the selection of the optimal composition of the mixture