Foamed concrete

Bindiganavile, Vivek; Hoseini, Meghdad

doi:10.1016/b978-0-08-102616-8.00016-2

Cited by 8 publications

(6 citation statements)

References 24 publications

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“…Foamed concrete [1,2], also known as aerated or cellular concrete [3,4] or cement-based foam [5], is basically the blend of a cement-based mix and a preformed foam. It is a light-weight material with an oven-density of 800 kg/m 3 or less [4] and an air volume fraction higher than 20% [6,7] or 25% [1].…”

Section: Introductionmentioning

confidence: 99%

“…It is a light-weight material with an oven-density of 800 kg/m 3 or less [4] and an air volume fraction higher than 20% [6,7] or 25% [1]. Typically, foamed concretes do not contain large aggregates [1,2]; indeed, ultra lightweight foamed concretes only contains cement, water and foam [1]. So, more than concretes, they are mortars or pastes [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Automatic generation of high-fidelity representative volume elements and computational homogenization for the determination of thermal conductivity in foamed concretes

Fachinotti,

Peralta,

Toro

et al. 2023

Mater Struct

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Foamed concretes are highly porous materials with excellent insulation properties. Their thermal conductivity is strongly dependent on the pore structure, characterized by the porosity as well as the shape and size distribution of pores. To define the representative volume element (RVE) of foamed concretes with high fidelity, we develop NRGene, an automatic generator of cubic samples with spherical air inclusions whose number and size obey a given distribution. We compute the effective thermal conductivity tensor for a given RVE using finite-element-based computational homogenization. The hi-fi RVE of foamed concretes may contain hundreds of millions of finite elements, making it better suited for benchmarking than for everyday engineering applications. Then, having the hi-fi model as benchmark, we propose a simplified model consisting of the hi-fi model called with a truncated histogram as input, which is largely cheaper while keeping a satisfactory accuracy. We model 21 different foamed concretes with a wide range of porosities and different compositions of the cement paste. Further, we demonstrate that it is the volume of all the pores of a given size, and not its quantity, what affects the effective thermal conductivity of foamed concretes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Automatic generation of high-fidelity representative volume elements and computational homogenization for the determination of thermal conductivity in foamed concretes

Fachinotti,

Peralta,

Toro

et al. 2023

Mater Struct

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“…In multiple freeze-thaw processes-namely freeze-thaw cycles-concrete tends to suffer such damage as crack formation, mass loss, increased porosity, and decreased mechanical properties [8]. It has been reported [9] that, compared with ordinary concrete, foam concrete has superior freeze-thaw cycle resistance. This is because the freeze-thaw damage of ordinary concrete is caused by the freezing expansion of water in the capillary pores.…”

Section: Freeze-thaw Cycle Resistancementioning

confidence: 99%

“…This is because the freeze-thaw damage of ordinary concrete is caused by the freezing expansion of water in the capillary pores. However, due to the large pores present in foam concrete, if the water in those pores is not saturated, and even if the water freezes and expands in the larger pores, no freeze-thaw damage will occur [9,10]. Therefore, foam concrete with a well-designed pore system will enjoy better freeze-thaw cycle resistance [11].…”

Section: Freeze-thaw Cycle Resistancementioning

confidence: 99%

A Review on Durability of Foam Concrete

Zhou

2023

Buildings

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Foam concrete is a promising material in building and construction applications, providing such outstanding properties as high specific strength, excellent thermal insulation, and effective acoustic absorption in human-inhabited buildings. However, because the porosity and permeable water absorption properties of foam concrete are significantly higher, its durability is often not comparable to that of ordinary concrete, and so the durability of foam concrete requires significant attention during the life cycle of building applications. Durable materials can greatly reduce the environmental impact of waste from maintenance and replacement and the consumption of natural resources resulting from the production of repair and replacement materials. After hardening, the durability of foam concrete includes freeze-thaw cycle resistance, elevated temperature resistance, carbonation resistance, efflorescence resistance, sulfate resistance, chloride resistance, alkali-silica reaction, and so on. This paper reviews articles on the durability of ordinary Portland cement (OPC) foam concrete, geopolymer foam concrete (GFC), magnesium phosphate cement (MPC) foam concrete, sulphoaluminate cement (SAC) foam concrete, and limestone calcined clay cement (LC3) foam concrete and compares their durability to provide a reference for the life cycle design and service life estimation of foam concrete members.

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“…It also has good insulating properties, making it perfect for floor and flat roof thermal and soundproofing insulation. FC is also used in applications such as cavity filling, well backfilling, masonry grouting, pipeline monolithic thermal insulation, monolithic low-rise, and individual house construction, levelling floors, road sub-bases and maintenance, bridge abutments and repairs, and ground stabilization [8]- [13]. Wells (2001) [14] classified the application of FC according to their densities and compressive strength in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Influence of Recycled Glass Ceramic Waste On Physical and Mechanical Properties of Foamed Concrete

Manaf¹,

Marsi²,

Shariff³

et al. 2022

IJIE

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Concrete is the most used man-made material and foamed concrete is a type of concrete widely known with high workability, low density and excellent thermal and sound insulation properties. Its global market has also been predicted to increase. Growing of population and economy, along with urbanization generate wastes which increase yearly. One of the solutions to reduce waste in landfills is by using waste in manufacturing. Glass, classed as a form of ceramic waste (GCW) has been left in the landfills unrecycled due to the challenges it causes. The primary purpose of this research is to find the optimal GCW composition as a quartz sand additive for Foamed Concrete-based Glass Ceramic Waste (FC-GCW) which will reduce the amount of unrecycled GCW that ends upin landfills while producing a sustainable product. The samples were prepared by grinding the GCW and mixing varying percentages of GCW (0, 5, 10, 15, 20, 25, and 30%) with a consistent quantity of cement, quartz sand, water, and foam. Physical (density, water absorption, porosity and Energy Dispersive X-ray (EDX)) test and analysis and mechanical (compressive strength) test were performed on the samples. During physical tests, the density increased as the GCW percentage increased, but water absorption andporosity decreased. FC-GCW 20% had appropriate density, water absorption, and porosity values of 0.887 g/cm3, 22.6 %, and 88.9%, respectively, which demonstrated that the material is lightweight and porous.For EDX analysis between FC-GCW control and FC-GCW 20%, it was found that when GCW was included, the weight percentage of Oxygen and Calcium decreased while the weight percentage of Silica increased, showing GCW increased Silica content, and pozzolanic reaction occurred to from Calcium Silicate Hydrate (C-S-H) gel.For mechanical testing, it was discovered that FC-GCW 20% had the highest average compressive strength of 0.94 MPa and 2.01 MPa for 7 and 28 days, respectively. This research's contribution can be applied to areas where low densities are preferred and low compressive strength is required, such as of road sub-base, fire breaks, raising floor level, void fill, harbour fill, bridge abutments and ground stabilization.

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Foamed concrete

Cited by 8 publications

References 24 publications

Automatic generation of high-fidelity representative volume elements and computational homogenization for the determination of thermal conductivity in foamed concretes

Automatic generation of high-fidelity representative volume elements and computational homogenization for the determination of thermal conductivity in foamed concretes

A Review on Durability of Foam Concrete

Influence of Recycled Glass Ceramic Waste On Physical and Mechanical Properties of Foamed Concrete

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