Rubber Crumb Modified Bitumen Produced from Crude Oils Residuals of Ukrainian Deposits

Andriy Nagurskyy;  ; Yuriy Khlibyshyn; Oleg Grynyshyn; Victoria Kochubei;  ;  ;

doi:10.23939/chcht14.03.420

The Rationale for the Use of Modified Bitumen Coated Overburden Rocks for Haul Roads of Coal Mines

E3S Web of Conferences ◽

10.1051/e3sconf/201910501018 ◽

2019 ◽

Vol 105 ◽

pp. 01018

Author(s):

Sergey Ivanov ◽

Nikita Martel

Keyword(s):

Chemical Composition ◽

Production Rate ◽

Coal Mining ◽

Coal Mine ◽

Crumb Rubber ◽

Rubber Crumb ◽

Modified Bitumen ◽

Secondary Material ◽

Adhesion Ability ◽

Physical And Chemical

Kuzbass is a leader in the field of mining of coal as one of the main materials for industry and civilian use. Its production rate its is constantly increasing, which can not but affect the problem of using secondary material (in particular, rocks that are not used in further construction) that is produced during coal mining. Overburden rocks are often stored in dumps or they are used for filling coal mine roads, although this is the problem. In terms of their physical and chemical composition, the overburden rocks are of low strength, so there is a problem of strengthening this type of material, the solution of which can be found in the processing of rocks used for further construction with modified bitumen. The analysis of the effect of the adhesion ability of construction bitumen and crumb rubber modified bitumen produced according to the technology of stage addition of rubber crumb to bitumen (bitumen modified with crumb rubber by stages) is described in the article. Examples of the adhesion of construction bitumen and bitumen modified with crumb rubber by stages to various rocks are given. The characteristics of the adhesion ability of bitumen modified with crumb rubber by stages are substantiated.

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Study of the zero shear viscosity of SBS copolymer modified bitumens

Budownictwo i Architektura ◽

10.35784/bud-arch.1854 ◽

2014 ◽

Vol 13 (4) ◽

pp. 251-258

Author(s):

Mieczysław Słowik ◽

Marta Andrzejczak

Keyword(s):

Shear Stress ◽

Constant Temperature ◽

Shear Viscosity ◽

Time Sequence ◽

Crude Oils ◽

Dynamic Shear ◽

Modified Bitumen ◽

Zero Shear Viscosity ◽

Dynamic Shear Rheometer ◽

Angular Deformation

The paper presents the results of the zero shear viscosity (ZSV) determined by using a dynamic shear rheometer (DSR). The tests were conducted with the use of 50/70 penetration grade bitumen produced from Venezuelan and Russian crude oils (named V50/70 and R50/70, respectively). Specimens of the tested polymer modified bitumens were combined with modified bitumen concentrate (containing 9% of SBS copolymer) by mixing them together. The objects of the tests were modified bitumens containing 1.5%; 3.0%; 4.5%; 6.0% and 9.0% of SBS copolymer. Zero shear viscosity (ZSV) was determined with the use of two methods: the creep method at various levels of shear stress in the time sequence and a method in which kinematic, sinusoidal angular deformation was applied. The tests were conducted at a constant temperature of 60˚C. The results of two ZSV tests gave similar findings for 50/70 penetration grade bitumen and modified bitumen with low SBS copolymer content (1.5%). In the case of modified bitumen with higher SBS copolymer content, i.e. 3%; 4.5%; 6%; 9%, zero shear viscosity determined by two methods gave different results.

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Investigation of modified bitumen binders via Fourier-transform infrared spectroscopy

Тонкие химические технологии ◽

10.32362/2410-6593-2020-15-2-56-66 ◽

2020 ◽

Vol 15 (2) ◽

pp. 56-66

Author(s):

I. V. Gordeeva ◽

D. A. Melnikov ◽

V. N. Gorbatovа ◽

D. S. Reznichenko ◽

Yu. A. Naumova

Keyword(s):

Infrared Spectroscopy ◽

Structural Changes ◽

Group Composition ◽

Chemical Interaction ◽

Thermoplastic Elastomer ◽

Rubber Crumb ◽

Modified Bitumen ◽

Rubber Powder ◽

Structural Indices ◽

Styrene Butadiene

Objectives. This study evaluates the effect of the modification process on the group composition of bitumen and bitumen binders containing rubber powder and hybrid modifier that is based on styrene–butadiene thermoplastic elastomer and rubber crumb. The aim of the study was to determine the presence or absence of functional groups that reflect the direction of physicochemical processes during the preparation of a hybrid modifier in rotary dispersers and during the modification of bitumen binders. Methods. Rubber powder and hybrid modifier were obtained by high-temperature shear grinding using a rotary disperser. Bitumen and modified bitumen binders were investigated via Fouriertransform infrared spectroscopy. Using the method of spectral subtraction, it was determined that during the process of manufacturing modified bitumen binders, structural changes occur in both bitumen and modifiers. During this study, the extraction of modifiers (rubber powder and hybrid modifier) in toluene was performed. Results. The quantitative analysis of changes in the group composition of modifiers before and after the modification procedure was carried out. The active polymer and structural indices were determined. The general trend of the change in the active polymer and structural indices was noted for the initial spectra of the rubber powder and hybrid modifier, and their spectra were obtained after the procedure of subtraction from the spectra of bitumen binders. Conclusions. The interdiffusion of aromatic compounds between the bitumen component and modifier particles was confirmed. On the basis of the results of the extraction of modifiers in toluene, and by taking into account the infrared spectroscopy data, it was determined that during the production of hybrid modifier during the simultaneous grinding of rubber crumb and styrene– butadiene thermoplastic elastomer, there was a chemical interaction between them.

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