Collection of scientific papers "Dorogi i Mosti" (Roads and Bridges)
ISSN 2524-0994 (Print)
ISSN 2786-488X (Online)
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Differentiation of methods for manufacturing the specimens of mixtures based on hydraulic binders

published:
Number: Issue 23(2021)
Section: Construction and civil engineering
DOI: https://doi.org/10.36100/dorogimosti2021.23.129
The page spacing of the article: 129–138
Keywords: hydraulically bound mixture; roller-compacted concrete; cold recycled mixtures; methods of specimens manufacturing; compaction methods
How to quote an article: Differentiation of methods for manufacturing the specimens of mixtures based on hydraulic binders.Dorogi і mosti [Roads and bridges]. 2021. Iss. 23. P. 129–138 [in Ukrainian].

Authors

M.P. Shulgin State Road Research Institute State Enterprise - DerzhdorNDI SE, Kyiv, Ukraine
https://orcid.org/0000-0002-3001-8012
State Enterprise «National Institute for Development Іnfrastructure» (SE «NIDI»), Kyiv, Ukraine
https://orcid.org/0000-0001-5206-9921

Summary

Introduction. To the particular group of road materials that are applied by close technologies belong hydraulically bound mixtures, roller-compacted concrete and cold recycled cement bound mixtures. As it is known, the composition and also the technology of application of road materials both affect the choice of method for their specimens manufacturing. For the Ukrainian road building industry, only one method for such specimens manufacturing was implemented, but in the world-wide practices there exist a developed differentiation of said methods which considers a lot of factors. The paper is aimed on the analysis and issues to be resolved in that direction.

General classification, analysis and criteria for selecting the standard methods for manufacturing the specimens of mixtures based on hydraulic binders. Taking into consideration the methods of compaction applied in various systems of standardization, the classification of methods of manufacturing of specimens of the specified types of mixtures was offered. A comparative analysis of methods of specimens manufacturing is performed taking into account the requirements for specimens, features of the procedure of selection of the mixture composition, conditions of specimens manufacturing and also mixture grading. Particular attention was paid to the choice of criteria for the manufacture of specimens of cold recycled mixtures, which, according to world practice of road construction, shall be subjected to the rheological properties testing.

Conclusions. Accounting for the world-wide experience in road building industry, established in Ukrainian practice methods of manufacturing specimens of mixtures based on hydraulic binders used by close technologies need to be improved in order to:

  • provide a selective approach to the procedure for selecting the mixture composition;
  • realize the possibility for making specimens on the construction area;
  • ensure performing of tests accounting for the extended requirements for said mixtures.

 

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