Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures

The cement industry is responsible for 8% of global CO<sub>2</sub> production. Therefore, a clear trend has been observed recently to replace to some extent the main binder of cement composites with environmentally friendly or recycled materials with a lower carbon footprint. This paper...

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Autores principales:	Maciej Szeląg, Joanna Styczeń, Roman Fediuk, Renata Polak
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	brick powder intelligent modeling mechanical properties mortar Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/9afb2c28a7214221afe267205be0068f
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spelling	oai:doaj.org-article:9afb2c28a7214221afe267205be0068f2021-11-11T17:54:07ZProperties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures10.3390/ma142163311996-1944https://doaj.org/article/9afb2c28a7214221afe267205be0068f2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6331https://doaj.org/toc/1996-1944The cement industry is responsible for 8% of global CO<sub>2</sub> production. Therefore, a clear trend has been observed recently to replace to some extent the main binder of cement composites with environmentally friendly or recycled materials with a lower carbon footprint. This paper presents the effect of brick powder (BP) on the physico-chemical and mechanical properties of cement mortars. The effect of a short-term thermal shock on morphology and strength properties of green mortars was investigated. BP addition caused increase in porosity and decrease in compressive and flexural strength of mortars. The best results were obtained for samples with 5% wt. BP addition. Above this addition the strength decreased. The mechanical performance of the samples subjected to thermal loading increased compared to the reference samples, which is the result of a process called as the “internal autoclaving”. The BP addition positively affects the linear shrinkage, leading to its reduction. The lowest linear shrinkage value was achieved by the mortar with the highest BP addition. An intelligent modeling approach for the prediction of strength characteristics, depending on the ultrasonic pulse velocity (UPV) is also presented. To solve the model problem, a supervised machine-learning algorithm in the form of an SVM (support vector machines) regression approach was implemented in this paper. The results indicate that BP can be used as a cement replacement in cement mortars in limited amounts. The amount of the additive should be moderate and tuned to the features that mortars should have.Maciej SzelągJoanna StyczeńRoman FediukRenata PolakMDPI AGarticlebrick powderintelligent modelingmechanical propertiesmortarTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6331, p 6331 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	brick powder intelligent modeling mechanical properties mortar Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	brick powder intelligent modeling mechanical properties mortar Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Maciej Szeląg Joanna Styczeń Roman Fediuk Renata Polak Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
description	The cement industry is responsible for 8% of global CO<sub>2</sub> production. Therefore, a clear trend has been observed recently to replace to some extent the main binder of cement composites with environmentally friendly or recycled materials with a lower carbon footprint. This paper presents the effect of brick powder (BP) on the physico-chemical and mechanical properties of cement mortars. The effect of a short-term thermal shock on morphology and strength properties of green mortars was investigated. BP addition caused increase in porosity and decrease in compressive and flexural strength of mortars. The best results were obtained for samples with 5% wt. BP addition. Above this addition the strength decreased. The mechanical performance of the samples subjected to thermal loading increased compared to the reference samples, which is the result of a process called as the “internal autoclaving”. The BP addition positively affects the linear shrinkage, leading to its reduction. The lowest linear shrinkage value was achieved by the mortar with the highest BP addition. An intelligent modeling approach for the prediction of strength characteristics, depending on the ultrasonic pulse velocity (UPV) is also presented. To solve the model problem, a supervised machine-learning algorithm in the form of an SVM (support vector machines) regression approach was implemented in this paper. The results indicate that BP can be used as a cement replacement in cement mortars in limited amounts. The amount of the additive should be moderate and tuned to the features that mortars should have.
format	article
author	Maciej Szeląg Joanna Styczeń Roman Fediuk Renata Polak
author_facet	Maciej Szeląg Joanna Styczeń Roman Fediuk Renata Polak
author_sort	Maciej Szeląg
title	Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
title_short	Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
title_full	Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
title_fullStr	Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
title_full_unstemmed	Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures
title_sort	properties and strength prediction modeling of green mortar with brick powder subjected to a short-term thermal shock at elevated temperatures
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9afb2c28a7214221afe267205be0068f
work_keys_str_mv	AT maciejszelag propertiesandstrengthpredictionmodelingofgreenmortarwithbrickpowdersubjectedtoashorttermthermalshockatelevatedtemperatures AT joannastyczen propertiesandstrengthpredictionmodelingofgreenmortarwithbrickpowdersubjectedtoashorttermthermalshockatelevatedtemperatures AT romanfediuk propertiesandstrengthpredictionmodelingofgreenmortarwithbrickpowdersubjectedtoashorttermthermalshockatelevatedtemperatures AT renatapolak propertiesandstrengthpredictionmodelingofgreenmortarwithbrickpowdersubjectedtoashorttermthermalshockatelevatedtemperatures
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Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated Temperatures

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