TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS

Lyudmila Medvedeva; Galina Makarchuk; Gennady Brantsevich

UDC 631.841

TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS

Published in Problems of risk management in the technosphere · Volume 2023, Issue 2 · Pages 188–196 · Rubric: Environmental safety

Received: 16.03.2023 Accepted: 07.04.2023 Published: 06.07.2023

Authors

Lyudmila Medvedeva

SPIN

Galina Makarchuk

SPIN

Gennady Brantsevich

Lyudmila Medvedeva

Academic degree: doctor of pedagogical sciences

Science rang: professor

Saint-Petersburg university of State fire service of EMERCOM of Russia professor · department of physical and technical fundamentals of fire safety · Russian Federation · Saint-Petersburg

SPIN

Galina Makarchuk

Academic degree: candidate of pedagogical sciences

Science rang: docent

Military Institute (Engineering) from the Military Academy of Logistics named after Army General A.V. Khruleva docent · St. Petersburg

SPIN

Gennady Brantsevich

LLC «Test center» general director · Russian Federation

ABSTRACT

The article actualizes the problem of ammonia emission in industrial and residential buildings into the indoor air. In the process of research, it was found that the sources of ammonia emission into indoor air are concrete structures (concrete walls, ceilings, columns, etc.) and finishing materials. In concrete, ammonia is formed as a result of the hydrolysis of urea (NH2)2CO contained in concrete, and carbamide (urea) and other similar substances are used as hardening accelerators and antifreeze additives, as well as ammoniated fly ash. It is emphasized that the concrete structure is simultaneously a reactor that produces ammonia and a desorber that ensures its emission into the room. Currently, sanitary and hygienic requirements set the maximum allowable concentrations of ammonia (daily average – 0,04 mg/m3 and single – 0,2 mg/m3). It was noted that when commissioning new monolithic multi-apartment residential buildings, large developers in megacities do not control the content of ammonia in the premises, and the established standards for the concentration of ammonia are not observed. Obviously, it is possible to prevent the emission of ammonia into indoor air by organizing a control system for concrete used in construction, as well as checking building materials to identify cases of exceeding the maximum permissible concentration of urea in them. The purpose of the article is to present the results of studies, during which a method for calculating the maximum allowable concentration of urea in a concrete mixture is proposed, which does not lead to an excess of ammonia concentration in rooms during their operation above a given value, and also approximate standards for the content of amide nitrogen in building materials are established.

KEYWORDS

environmental safety, concrete structures, ammonia, amide nitrogen, urea, concrete mix, building materials

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Professor of the Department of Physical and Chemical Fundamentals of Combustion and Extinguishing Processes Saint-Petersburg university of State fire service of EMERCOM of Russia

Olga Lozhkina

Head of the Department of Fire, Rescue Equipment and automotive industry of Saint-Petersburg university of State fire service of EMERCOM of Russia

Maksim Sytdykov

3451

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Medvedeva L. V., Makarchuk G. V., Brantsevich G. V. TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS // Problems of risk management in the technosphere. 2023. no. 2. pp. 188-196. URL: https://journals.igps.ru/en/nauka/publications/article/6a9c151e32807fdbab866577/to-the-question-of-the-determination-of-amide-nitrogen-in-building-materials/view. (Date of access 23.10.2026).

MLA

Lyudmila Medvedeva, Makarchuk G. V., Brantsevich G. V.. "TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS." Problems of risk management in the technosphere 2023.2 (2023): 188-196. URL: https://journals.igps.ru/en/nauka/publications/article/6a9c151e32807fdbab866577/to-the-question-of-the-determination-of-amide-nitrogen-in-building-materials/view.

APA

Medvedeva L. V., Makarchuk G. V., Brantsevich G. V. (2023). TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS. Problems of risk management in the technosphere, 2023(2), 188-196. URL: https://journals.igps.ru/en/nauka/publications/article/6a9c151e32807fdbab866577/to-the-question-of-the-determination-of-amide-nitrogen-in-building-materials/view

Chicago

Lyudmila Medvedeva, Makarchuk G. V., Brantsevich G. V.. "TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS." Problems of risk management in the technosphere 2023, no. 2 (2023): 188-196. URL: https://journals.igps.ru/en/nauka/publications/article/6a9c151e32807fdbab866577/to-the-question-of-the-determination-of-amide-nitrogen-in-building-materials/view.

WIKI

{{cite journal | author = Medvedeva L. V., Makarchuk G. V., Brantsevich G. V. | title = TO THE QUESTION OF THE DETERMINATION OF AMIDE NITROGEN IN BUILDING MATERIALS | journal = Problems of risk management in the technosphere | year = 2023 | volume = 2023 | issue = 2 | pages = 188-196 | url = https://journals.igps.ru/en/nauka/publications/article/6a9c151e32807fdbab866577/to-the-question-of-the-determination-of-amide-nitrogen-in-building-materials/view }}

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