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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MDPI AG
2021-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/21/6331 |
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| author | Maciej Szeląg Joanna Styczeń Roman Fediuk Renata Polak |
| author_facet | Maciej Szeląg Joanna Styczeń Roman Fediuk Renata Polak |
| author_sort | Maciej Szeląg |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:58:55Z |
| format | Article |
| id | doaj.art-9afb2c28a7214221afe267205be0068f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:58:55Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9afb2c28a7214221afe267205be0068f2023-11-22T21:10:33ZengMDPI AGMaterials1996-19442021-10-011421633110.3390/ma14216331Properties and Strength Prediction Modeling of Green Mortar with Brick Powder Subjected to a Short-Term Thermal Shock at Elevated TemperaturesMaciej Szeląg0Joanna Styczeń1Roman Fediuk2Renata Polak3Department of Construction, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, PolandDepartment of Construction, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, PolandPolytechnic Institute, Far Eastern Federal University, 690922 Vladivostok, RussiaDepartment of Thermal Technology and Food Process Engineering, University of Life Sciences in Lublin, Głęboka 31, 20-612 Lublin, PolandThe 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.https://www.mdpi.com/1996-1944/14/21/6331brick powderintelligent modelingmechanical propertiesmortar |
| spellingShingle | 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 Materials brick powder intelligent modeling mechanical properties mortar |
| title | 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_short | 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 |
| topic | brick powder intelligent modeling mechanical properties mortar |
| url | https://www.mdpi.com/1996-1944/14/21/6331 |
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