Bio-based aggregate in the production of advanced thermal-insulating concrete with improved acoustic performance

Pokorný, Jaroslav; Ševčík, Radek; Šál, Jiří; Fiala, Lukáš; Zárybnická, Lucie; Podolka, Luboš

doi:10.1016/j.conbuildmat.2022.129436

Cited by 17 publications

(5 citation statements)

References 48 publications

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“…Thermal-physical properties were measured with the device ISOMET 2114 (Applied Precision, Ltd., Bratislava, Slovakia), which operates on the transient measuring method. The experimental set and measuring accuracy of the method used are provided in Pokorný et al's work [55]. The digital microscope VHX 6000 (KEYENCE INTERNATIONAL, Corp., Mechelen, Belgium)-see more in Pokorný et al's work [44]-was used for microstructural observations of the produced mortars.…”

Section: Testing Proceduresmentioning

confidence: 99%

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

Pokorný,

Zárybnická,

Ševčík

et al. 2024

Buildings

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Plastics represent an integral part of our everyday lives, with various functions from packaging materials to insulation layers in our buildings. Pure expanded polystyrene (EPS) is a good example of a fully recyclable material. However, once polluted with other materials or substances, EPS becomes a serious environmental burden. In this work, waste EPS for the production of greener building composites with balanced properties and utility value was investigated. Natural aggregate (2/4 mm) was substituted with corresponding fractions of a thermoplastic alternative in portions of 25, 50, 75, and 100 vol.%. The comprehensive experimental investigation evaluated physical and mechanical properties, heat transport and accumulation, and water absorption characteristics. Due to the uniformly distributed plastic particles in the hardened cement-based matrix, the data revealed an important reduction in the dead weight of produced mortars, which also reduced thermal conductivity by up to 47%. On one hand, lightweight mortars showed partially reduced mechanical resistivity; on the other hand, the EPS bead-modified structure turned out to be effective in liquid water transport reduction.

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Section: Testing Proceduresmentioning

confidence: 99%

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

Pokorný,

Zárybnická,

Ševčík

et al. 2024

Buildings

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“…On the other hand, the improvement in the environmental characteristics is highlighted, since a doping percentage of 5% means a reduction in CO 2 emissions of 10%, which confers an environmental advantage [44]. And the same applies to other bio-based elements [46]. As can be seen, the use of agricultural waste in the construction sector is a technique that is becoming more and more widespread and applied.…”

Section: Introductionmentioning

confidence: 99%

Alternative Use of the Waste from Ground Olive Stones in Doping Mortar Bricks for Sustainable Façades

San Vicente-Navarro,

Mendívil-Giro,

Los Santos-Ortega

et al. 2023

Buildings

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The aim of achieving sustainability in construction is a reality. A useful strategy to achieve this is the use of waste from agricultural activities. This waste could reduce the environmental impacts associated with the production of raw materials such as natural aggregate, reducing energy consumption from fossil fuels and therefore CO2 emissions. This study examines the thermal conductivity of mortars doped with ground olive stones, a residual by-product of industrial processes. The objective is to evaluate the potential of ground olive stones to improve thermal insulation in construction. Ground olive stones are used as a partial replacement for the aggregates used in mortar bricks. The methodology followed herein to quantify the benefits of this product involves creating several types of mortar with a different percentage of ground olive stones in each sample (between 0% and 30%). Thermal conductivity was determined according to UNE-EN12939:2001. Finally, a case study is conducted performing an energy simulation of a residential building to determine the energy savings derived from reducing the combined thermal demands of heating and cooling and to analyse the feasibility of the alternative use of ground olive stone residue doped in mortar bricks for new sustainable façades. The results show a saving in energy demand (heating and cooling) of 0.938 kWh/m2·year when using 30% GOS-doped mortar bricks compared to the reference bricks. This is equivalent to a decrease in energy demand of 2.23% per square meter of façade. In addition, these annual energy savings are compared to the potential thermal energy created from the combustion of ground olive stones in a biomass boiler, which is the main traditional use of this waste today. It reveals that for a doping range of 5–15%, the recovery time ranges between 30 and 75 yeas, which is within the lifetime of a building. The results demonstrate the great viability of using ground olive stones as fine aggregates in mortars and their possible application in sustainable construction, in particular in more sustainable façades that allow energy savings in buildings and therefore a lower consumption of fossil, which will make it possible to reduce greenhouse gas emissions and the excessive consumption of resources.

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“…Concrete constitutes a versatile building material that has become an essential part of the construction industry not only during the whole 20th century, but also contributes to the continuing global building explosion [1]. Due to its beneficial properties, such as considerable strength, durability and shape variability, the world's tallest building (Burj Khalifa with its 828 m, located in Dubai, United Arab Emirates), for example, could be constructed [2].…”

Section: Introductionmentioning

confidence: 99%

The Role of High Carbon Additives on Physical–Mechanical Characteristics and Microstructure of Cement-Based Composites

et al. 2023

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Traditional supplementary cementitious materials (SCMs) have been proven to reduce the negative impact of Portland cement production on the environment. However, the availability of SCMs becomes limited due to their extensive usage. For this reason, our work aimed to investigate the effect of partial substitution of ordinary Portland cement (OPC) with two different types of carbon-rich waste powders—biochar (BC) and coal dust (CD), dosed separately up to 10 wt.% of OPC, on the physical, microstructural and mechanical properties of hardened specimens. Obtained data pointed out that replacing OPC with small amounts of BC and CD (not exceeding 5.0 wt.% and 2.5 % wt.%, respectively) initiated an increment in mechanical strengths due to a decrease in total open porosity and enhanced formation of hydration products of such composites compared with the reference. Overall, both examined alternatives, if added in appropriate amounts, have the perspective to be effectively applied in cement manufacturing and concrete production, and thus to importantly contribute to the long-term sustainability of the construction industry in view of energy savings, reduced releasing of the greenhouse gasses and mitigating of global climate changes.

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Bio-based aggregate in the production of advanced thermal-insulating concrete with improved acoustic performance

Cited by 17 publications

References 48 publications

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

Alternative Use of the Waste from Ground Olive Stones in Doping Mortar Bricks for Sustainable Façades

The Role of High Carbon Additives on Physical–Mechanical Characteristics and Microstructure of Cement-Based Composites

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