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A platform for research: civil engineering, architecture and urbanism
Carbonation Studies in Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-0236-8664
https://orcid.org/http://orcid.org/0000-0002-2004-7338
https://orcid.org/http://orcid.org/0009-0006-7567-5864
https://orcid.org/http://orcid.org/0000-0002-1995-6139
https://orcid.org/http://orcid.org/0009-0008-2868-1596
The development of carbon footprint reduction technologies in construction materials science will allow successful utilization of large-tonnage industrial waste. A promising direction is the use of geopolymers and alkali-activated concrete in construction. However, due to the poor study of the problem, questions remain about ensuring the durability of these materials in various aggressive environments, as well as ensuring a stable composition of binders based on industrial waste. This article describes the results of a study of the features of the mechanism of accelerated carbonization of alkali-activated concrete based on dust-carryover from a cupola of mineral wool production. The binder is a low-base dust-carryover from the gas cleaning system of a cupola of mineral wool production. An aqueous solution of NaOH with a concentration of 6M is used as a liquid activator. Fine-grained concrete samples with water-cement ratio of 0.45, 0.55, 0.60 were used for testing. It was found that the kinetics of carbonation of the samples has a fading nature and is expressed as a power function of the depth of carbonation over time. The exponent fluctuates from 0.4 to 0.57 depending on the density of the concrete. The carbonation front develops uniformly with small breakthroughs. At the initial stage, the front is controlled by kinetic limitation, subsequently it passes to internal diffusion limitation.
Carbonation Studies in Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-0236-8664
https://orcid.org/http://orcid.org/0000-0002-2004-7338
https://orcid.org/http://orcid.org/0009-0006-7567-5864
https://orcid.org/http://orcid.org/0000-0002-1995-6139
https://orcid.org/http://orcid.org/0009-0008-2868-1596
The development of carbon footprint reduction technologies in construction materials science will allow successful utilization of large-tonnage industrial waste. A promising direction is the use of geopolymers and alkali-activated concrete in construction. However, due to the poor study of the problem, questions remain about ensuring the durability of these materials in various aggressive environments, as well as ensuring a stable composition of binders based on industrial waste. This article describes the results of a study of the features of the mechanism of accelerated carbonization of alkali-activated concrete based on dust-carryover from a cupola of mineral wool production. The binder is a low-base dust-carryover from the gas cleaning system of a cupola of mineral wool production. An aqueous solution of NaOH with a concentration of 6M is used as a liquid activator. Fine-grained concrete samples with water-cement ratio of 0.45, 0.55, 0.60 were used for testing. It was found that the kinetics of carbonation of the samples has a fading nature and is expressed as a power function of the depth of carbonation over time. The exponent fluctuates from 0.4 to 0.57 depending on the density of the concrete. The carbonation front develops uniformly with small breakthroughs. At the initial stage, the front is controlled by kinetic limitation, subsequently it passes to internal diffusion limitation.
Carbonation Studies in Alkali-Activated Concrete
https://orcid.org/http://orcid.org/0000-0002-0236-8664
https://orcid.org/http://orcid.org/0000-0002-2004-7338
https://orcid.org/http://orcid.org/0009-0006-7567-5864
https://orcid.org/http://orcid.org/0000-0002-1995-6139
https://orcid.org/http://orcid.org/0009-0008-2868-1596
The development of carbon footprint reduction technologies in construction materials science will allow successful utilization of large-tonnage industrial waste. A promising direction is the use of geopolymers and alkali-activated concrete in construction. However, due to the poor study of the problem, questions remain about ensuring the durability of these materials in various aggressive environments, as well as ensuring a stable composition of binders based on industrial waste. This article describes the results of a study of the features of the mechanism of accelerated carbonization of alkali-activated concrete based on dust-carryover from a cupola of mineral wool production. The binder is a low-base dust-carryover from the gas cleaning system of a cupola of mineral wool production. An aqueous solution of NaOH with a concentration of 6M is used as a liquid activator. Fine-grained concrete samples with water-cement ratio of 0.45, 0.55, 0.60 were used for testing. It was found that the kinetics of carbonation of the samples has a fading nature and is expressed as a power function of the depth of carbonation over time. The exponent fluctuates from 0.4 to 0.57 depending on the density of the concrete. The carbonation front develops uniformly with small breakthroughs. At the initial stage, the front is controlled by kinetic limitation, subsequently it passes to internal diffusion limitation.
Carbonation Studies in Alkali-Activated Concrete
Lecture Notes in Civil Engineering
Klyuev, Sergey Vasil'yevich (editor) / Vatin, Nikolay Ivanovich (editor) / Nabiullina, Karina Rashidovna (editor) / Yumagulova, Venera Maratovna (editor) / Fedorov, P A (author) / Yamaeva, S O (author) / Latypov, V M (author) / Klyuev, S. V. (author) / Lutsyk, E V (author)
International Conference on Recent Advances in Architecture and Construction ; 2024 ; Kazan, Russia
2025-02-21
7 pages
Article/Chapter (Book)
Electronic Resource
English
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