Design of concrete mixtures with calcined brick soil

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00382507" target="_blank" >RIV/68407700:21110/24:00382507 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1088/1742-6596/2911/1/012027" target="_blank" >https://doi.org/10.1088/1742-6596/2911/1/012027</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2911/1/012027" target="_blank" >10.1088/1742-6596/2911/1/012027</a>

Result language

angličtina

Original language name

Design of concrete mixtures with calcined brick soil

Original language description

Calcined clays have become one of the most researched themes in the field of cement replacement in recent years. However, it is not only pure kaolinite that can be used for thermal activation. There are other options such as the use of lower-grade clays. The brick soils can be considered as a representative of these lower-grade clays. The studied soil had a lower content of clay minerals (40%) and a higher content of other impurities, mainly quartz (18%) and calcite (43%). It also contained a minor amount of gypsum (4%). After thermal calcination at 650 °C, 37% of the amorphous matter was formed, which was assumed to be a reactive part. Based on this assumption, the mixture compositions, more precisely the substitutions in the concrete mixture were made using so-called rational design. The amount of amorphous matter was used to replace cement, while the amount of crystalline phases substituted a fine aggregate. Within this logic, 5 mixtures with a replacement level of up to 25% were designed. However, as the calcined brick soil was somewhat finer, a plasticizing admixture had to be used to achieve comparable workability without an immense increase in water dosage. The best compressive strength was obtained in the case of a mixture with the 10% replacement. Specifically, it reached 69 MPa, which was by 14% higher value than the reference. Nevertheless, also the mixture with 25% showed applicable results. Its compressive strength was 55 MPa, by 11% lower value compared to the reference mixture.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GA22-16577S" target="_blank" >GA22-16577S: Alternatives of thermally activated lower grade clays as a partial cement replacement</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Journal of Physics: Conference Series 2911

ISBN

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ISSN

1742-6588

e-ISSN

1742-6596

Number of pages

6

Pages from-to

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Publisher name

IOP Publishing Ltd.

Place of publication

Bristol

Event location

Miskolctapolca

Event date

Sep 4, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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