Study of Linear Deformation Changes in Heavy Concrete  Based on Modified Portland Cement

Armine Meymaryan; Nikolay Chilingaryan

doi:10.54338/27382656-2022.3-007

Authors

Armine Meymaryan National University of Architecture And Construction of Armenia https://orcid.org/0000-0001-6441-7823
Nikolay Chilingaryan National University of Architecture and Construction of Armenia https://orcid.org/0000-0002-9581-6832

DOI:

https://doi.org/10.54338/27382656-2022.3-007

Keywords:

modified Portland cement, expanding additive, heavy concrete, water-cement ratio, linear deformations

Abstract

The investigation results revealed how modified standard Portland cement of grade 42,5 (M400) with 10% of the expanding additive changes the deformation characteristics of heavy concrete. Heavy concrete of class B 22.5 (M300) with a different water-cement ratio (slump 3 cm and 5 cm) was selected as the object of study, from which cubic specimens of side 10 cm were prepared. The impact of modified cement on concrete linear deformations is determined at the ages of 1, 3, and 28 days under normal setting conditions, and changes in the sizes of the same specimens are checked for three months under air-drying conditions. The study confirmed that the most effective impact of modified cement, as in the case of construction mortars, is also observed in 3–7 days of curing. It was found that the effect of modified cement is increased with the increase in the water-cement ratio, and a relatively low percentage of expansion through the low water-cement ratio is explained by the certain rigidity of the concrete internal structure.

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Author Biographies

Armine Meymaryan, National University of Architecture And Construction of Armenia

Doctor of Philosophy (PhD) in Engineering (RA,Yerevan) - NUACA, National University of Architecture and Construction of Armenia, Associate Professor at the Chair of Production of Construction Materials, Items and Structures

Nikolay Chilingaryan, National University of Architecture and Construction of Armenia

Doctor of Science (Engineering), Professor (RA, Yerevan) - National University of Architecture and Construction of Armenia, Researcher at the Research Laboratory of Construction and Urban Economy

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