ORGANIC-MINERAL MODIFIER BASED ON SLURRY WATER FOR  THE PRODUCTION OF HIGH-STRENGTH SELF-COMPACTING CONCRETES

Oksana Larsen; Anton Bakhrakh; Tatyana Machine

doi:doi:10.62980/2076-0655-2024-365-376

VAK Russia 2.1.5 UDC 691.3 CSCSTI 67.09 Russian Classification of Professions by Education 08.06.01 Russian Library and Bibliographic Classification 383 Russian Trade and Bibliographic Classification 6

ORGANIC-MINERAL MODIFIER BASED ON SLURRY WATER FOR THE PRODUCTION OF HIGH-STRENGTH SELF-COMPACTING CONCRETES

Published в Technique and technology of silicates · Volume 31, Issue 4, 2024 · Pages 365–376 · Rubrics: MAIN RUBRIC

DOI 10.62980/2076-0655-2024-365-376 EDN mjupxw

Received: 26.09.2024 Accepted: 23.10.2024 Published: 24.11.2024 Language of publication: RUS

Authors

Oksana Larsen ¹ · Anton Bakhrakh ² · Tatyana Machine ³

1 Nacional'nyy issledovatel'skiy Moskovskiy gosudarstvennyy stroitel'nyy universitet (kafedra stroitel'nogo materialovedeniya, Associate Professor)
Moscow, Moscow, Russian Federation

2 NRU MGSU
Russian Federation

3 Moscow State University of Civil Engineering
Russian Federation

ABSTRACT

The production of concrete mix is inevitably associated with the formation of sludge water, which has an impact on the environ-ment. The technology of recycling concrete mix allows you to use not only slurry water from the production of ready-mixed con-crete, but also to obtain a highly dispersed organomineral modifier (OMD) based on dehydrated sludge, obtained by fine grind-ing in a ball mill. A modifier was obtained by grinding in a ball mill for 2.5 hours with a specific surface area of 15657 cm2/g. The introduction of a dry polycarboxylate plasticizer in an amount of 0.025% made it possible to reduce the grinding time in the mill to 1 hour and obtain a specific surface area equal to 16227 cm2/g. The chemical composition of the organomineral modifier and the basic properties of cement paste in the presence of OMD are investigated. An increase in the normal density of the cement paste by 2.4%, an acceleration of the setting time and an increase in strength in the initial hardening periods were found. It is shown that the introduction of slurry water with mixing water in an amount of 5% into the concrete mixture does not lead to a decrease in strength parameters. The introduction of OMD based on slurry water in an amount of 10% does not adversely affect the technological properties and slightly increases the strength of concrete at the age of 28 days. The resulting modifier, partici-pating in the resource-saving cycle and possessing such important characteristics, will serve as an alternative to the use of other mineral additives used in the production of self-sealing concretes, will reduce the consumption of raw materials, and the selec-tion of its optimal content will affect changes in the technological and strength properties of concretes.

KEYWORDS

slurry water grinding specific surface area concrete mix self-sealing concrete jrganic-mineral modifier

Information

Authors:

1. Nacional'nyy issledovatel'skiy Moskovskiy gosudarstvennyy stroitel'nyy universitet (kafedra stroitel'nogo materialovedeniya, Associate Professor)

Moscow, Moscow, Russian Federation

2. NRU MGSU

Russian Federation

3. Moscow State University of Civil Engineering

Russian Federation

Type:

Article

Pages:

from 365 to 376

Status:

Published

Subject area:

VAK Russia 2.1.5
UDC 691.3
CSCSTI 67.09
Russian Classification of Professions by Education 08.06.01
Russian Library and Bibliographic Classification 383
Russian Trade and Bibliographic Classification 6

Language:

Russian, English

Keywords:

slurry water, grinding, specific surface area, concrete mix, self-sealing concrete, jrganic-mineral modifier

Funding

The work was carried out at NIU MSCU within the framework of the University Development Program “PRIORITY 2030”. Project 3.1 “Scientific breakthrough in the construction industry - new technologies, new materials, new meth-ods”

References

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ORGANIC-MINERAL MODIFIER BASED ON SLURRY WATER FOR THE PRODUCTION OF HIGH-STRENGTH SELF-COMPACTING CONCRETES

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