The environmental impacts of foamed concrete production and exploitation

Namsone, Elvija; Korjakins, Aleksandrs; Šahmenko, Genādijs; Šinka, Māris

doi:10.1088/1757-899x/251/1/012029

Cited by 20 publications

(19 citation statements)

References 7 publications

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“…From the life cycle stages of raw material achievement, production, use/recycle/repairs, and reutilize/waste management [ 224 , 225 ], lightweight concrete seems to require less energy, which leads to more sustainable practice. Another research also highlighted on the environmental impacts of FC production [ 226 ]. Reducing carbon footprint was discovered and more sustainable than autoclaved aerated concrete for wall construction [ 226 ].…”

Section: Future Research Focusmentioning

confidence: 99%

“…Another research also highlighted on the environmental impacts of FC production [ 226 ]. Reducing carbon footprint was discovered and more sustainable than autoclaved aerated concrete for wall construction [ 226 ]. Therefore, it is essential to identify the lightweight FC’s sustainability through a life-cycle-assessment, as it is claimed as a green constructional material.…”

Section: Future Research Focusmentioning

confidence: 99%

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Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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Foamed concrete (FC) is a high-quality building material with densities from 300 to 1850 kg/m3, which can have potential use in civil engineering, both as insulation from heat and sound, and for load-bearing structures. However, due to the nature of the cement material and its high porosity, FC is very weak in withstanding tensile loads; therefore, it often cracks in a plastic state, during shrinkage while drying, and also in a solid state. This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC). For this purpose, various foaming agents, fibres and other components that can serve as a basis for FRFC are reviewed and discussed in detail. Several factors have been found to affect the mechanical properties of FRFC, namely: fresh and hardened densities, particle size distribution, percentage of pozzolanic material used and volume of chemical foam agent. It was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam; therefore, it is necessary to apply an additional dosage of a foam agent to enhance the adhesion and cohesion between the foam agent and the cementitious filler in comparison with materials without fibres. Various types of fibres allow the reduction of by autogenous shrinkage a factor of 1.2–1.8 and drying shrinkage by a factor of 1.3–1.8. Incorporation of fibres leads to only a slight increase in the compressive strength of foamed concrete; however, it can significantly improve the flexural strength (up to 4 times), tensile strength (up to 3 times) and impact strength (up to 6 times). At the same time, the addition of fibres leads to practically no change in the heat and sound insulation characteristics of foamed concrete and this is basically depended on the type of fibres used such as Nylon and aramid fibres. Thus, FRFC having the presented set of properties has applications in various areas of construction, both in the construction of load-bearing and enclosing structures.

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Section: Future Research Focusmentioning

confidence: 99%

Section: Future Research Focusmentioning

confidence: 99%

Fibre-Reinforced Foamed Concretes: A Review

et al. 2020

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“…The foam concrete used in this study is produced by a local producer and the components of the concrete mix are already optimized for foam concrete in previous studies [20], [21]. In this study, two foam concrete mixes with different compressive strength 12.5 MPa with density 1150 kg/m 3 and 2.4 MPa with density 445 kg/m 3 and different thermal conductivity (Table 1) is analysed with regard to its impact on the environment.…”

Section: Methodsmentioning

confidence: 99%

Life Cycle Assessment of Foam Concrete Production in Latvia

Zimele

Šinka

Korjakins

et al. 2019

Environmental and Climate Technologies

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Global warming being increasingly discussed, solutions for reducing emission greenhouse gases become more important in all industry sectors. The total energy consumed in the construction sector contribute up to 1/3 from all greenhouse gases emissions. Large part of it comes from the cement production – 5 % of the total global emissions. The foam concrete is lightweight concrete with good thermal properties and ability to reduce CO2 emissions by reducing the use of cement due to its low density. The aim of this study is to determine impact on the environment with the use of Life Cycle Assessment (LCA) with focus on Global Warming Potential (GWP) for two different compressive strength foam concrete mixtures produced in Latvia by unique intensive mixing technology – turbulence with cavitation effect. Afterwards, the selected foam concrete mixtures are compared with alternative materials with similar compressive strength – aerated concrete and hollow ceramic blocks. The foam concrete mixture having 12.5 MPa compressive strength showed higher CO2 emissions than hallow ceramic block. The majority of CO2 emissions comes from the Portland cement, which is a key element in its composition. On the other hand, the foam concrete mixture having 2.4 MPa compressive strength showed higher CO2 emissions than aerated concrete block. The majority of CO2 emissions are due to foam glass granules, which is the main element contributing to the increased insulation properties of the material. Comparison of each foam concrete with analogue building material by compressive strength shows that the chosen foam concrete mixtures produce greater GWP than alternative materials. This research allows to identify the environmental impacts of different foam concrete mixture components and to improve these mixtures to achieve similar properties with less impact, for example, by replacing foam glass granules with granules made from recycled glass or replacing cement with flay ash, silica fume or recycled glass powder.

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“…Foam concrete is also beginning to be used in range of light weight, semi-structural application for example bridge abutments, floor and roof screeding, where the higher strengths is required (Narayanan et al, 2000). Table 1 shows the application of foam concrete at different place (Namsone et. al.…”

Section: Application Of Foam Concretementioning

confidence: 99%

Utilization of Rubber Powder of Waste Tyres in Foam Concrete

Mehrani

Bhatti

et al. 2019

Journal of Applied Engineering Sciences

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Foam concrete or light concrete has become increasingly recognizable in commercial and construction field. Foam concrete is not just light in its weight but also light in cost, as there is no coarse aggregate needed in its production. Application of foam concrete is limited due to the fact that it is not as strong as conventional concrete in terms of strength and rigidness. Therefore, this study is to investigate the potential of foam concrete incorporating with rubber powder of waste tire and admixture as an additive material to improve its strength and workability. Thus, the use of rubber powder in this study could enhance the strength by filling the voids in foam concrete. The amount of rubber powder added as additive in foam concrete is 0%, 5%, 10%, 15% and 20% respectively. The amount of plasticizers used is limited to less than 0.4% to the weight of cement. The mix design was set to achieve density of 1800kg/m3. The workability of foam concrete is decreasing as the percentage of rubber power was increasing. The foam concrete containing 5%of rubber powder has highest compressive strength with value of 20.6 MPa for 7 days water curing and 22.3 MPa for 28 days water curing. Significantly showing an increase of 1.7 MPa. The highest value of tensile strength for both air curing 7 and 28 days are 1.86 MPa and 1.97 MPa also held by 3% of rubber powder mix. As a conclusion the optimum rubber powder content to be used in foam concrete is 5% that gives the highest results in terms of workability and strength.

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The environmental impacts of foamed concrete production and exploitation

Cited by 20 publications

References 7 publications

Fibre-Reinforced Foamed Concretes: A Review

Fibre-Reinforced Foamed Concretes: A Review

Life Cycle Assessment of Foam Concrete Production in Latvia

Utilization of Rubber Powder of Waste Tyres in Foam Concrete

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