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Method for avoiding cracks during drying of masonry units made of illite raw material

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2019
363.pdf (933.6Kb)
Authors
Vasić, Miloš
Radojević, Zagorka
Conference object (Published version)
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Abstract
Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information's about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff - MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa a...nd that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.

Source:
Modern Technologies in Industrial Engineering Vii (Modtech2019), 2019, 591
Publisher:
  • IOP Publishing Ltd, Bristol
Funding / projects:
  • Development and application of multifunctional materials using domestic raw materials in upgraded processing lines (RS-45008)

DOI: 10.1088/1757-899X/591/1/012101

ISSN: 1757-8981

WoS: 000562929900101

Scopus: 2-s2.0-85072125822
[ Google Scholar ]
1
1
URI
http://rims.institutims.rs/handle/123456789/366
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
Institut za ispitivanje materijala
TY  - CONF
AU  - Vasić, Miloš
AU  - Radojević, Zagorka
PY  - 2019
UR  - http://rims.institutims.rs/handle/123456789/366
AB  - Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information's about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff - MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa and that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.
PB  - IOP Publishing Ltd, Bristol
C3  - Modern Technologies in Industrial Engineering Vii (Modtech2019)
T1  - Method for avoiding cracks during drying of masonry units made of illite raw material
VL  - 591
DO  - 10.1088/1757-899X/591/1/012101
ER  - 
@conference{
author = "Vasić, Miloš and Radojević, Zagorka",
year = "2019",
abstract = "Drying is one of the most important steps in the production process of masonry units. In order to prevent the formation of cracks during drying information's about the moisture migration rate variability as well as the material strength variability through drying are necessary. The main goal of this paper was to find a solution how to prevent the crack formation at the beginning (during the first hour) of the drying for the drying sensitive illite raw material. The first step was to record a series of isothermal Deff - MR curves at different drying air temperatures and constant drying air velocity and humidity. As it was already reported all moisture transport mechanisms during isothermal drying are visible on those curves. Characteristic spots registered on these curves were then transposed on the experimentally registered figure material strength us moisture content. It was found that the material strength for the cracked masonry units at the beginning of drying was around 0.09 MPa and that the time of cracking was near the characteristic spot B. Registered material strength and the crack time position (spot B) has additionally confirmed that the drying sensitivity of the raw material are obviously related with the present clay mineral constituents structure and the initial moisture content of the green heavy clay units. Using the Deff values registered for each experiment in the spot B we were able to calculate the maximal moisture transport rate and consequently the proper drying air parameters which are safe and which will not initialize the formation of the cracks at the beginning of the drying.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Modern Technologies in Industrial Engineering Vii (Modtech2019)",
title = "Method for avoiding cracks during drying of masonry units made of illite raw material",
volume = "591",
doi = "10.1088/1757-899X/591/1/012101"
}
Vasić, M.,& Radojević, Z.. (2019). Method for avoiding cracks during drying of masonry units made of illite raw material. in Modern Technologies in Industrial Engineering Vii (Modtech2019)
IOP Publishing Ltd, Bristol., 591.
https://doi.org/10.1088/1757-899X/591/1/012101
Vasić M, Radojević Z. Method for avoiding cracks during drying of masonry units made of illite raw material. in Modern Technologies in Industrial Engineering Vii (Modtech2019). 2019;591.
doi:10.1088/1757-899X/591/1/012101 .
Vasić, Miloš, Radojević, Zagorka, "Method for avoiding cracks during drying of masonry units made of illite raw material" in Modern Technologies in Industrial Engineering Vii (Modtech2019), 591 (2019),
https://doi.org/10.1088/1757-899X/591/1/012101 . .

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