Experimental Investigation of Properties of Foam Concrete for Industrial Floors in Testing Field

Vlček, Jozef; Drusa, Marián; Scherfel, Walter; Sedlar, Bronislav

doi:10.1088/1755-1315/95/2/022049

Cited by 10 publications

(13 citation statements)

References 9 publications

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“…Foam concrete contains closed void pores that allow achieving a low bulk density with a low material requirement of raw materials. Thanks to its properties, it is usable as a replacement of conventional subbase layers of the floors, the pavements or as a part of the foundation structures of passive buildings [1][2][3][4]. Mixture composition of foam concrete can be prepared for the production of various bulk densities.…”

Section: Foam Concretementioning

confidence: 99%

Testing of Foam Concrete for Definition of Layer Interacting With Subsoil in Geotechnical Applications

Drusa¹

2019

GEOMATE

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Today's production of foam concrete (FC) has become more suitable for various types of applications due to the usage of new additives and improved technology. One typical application of foam concrete in Europe is the creation of a sub-base layer of the floor of multi-storey buildings, where thermal and noise insulation functions are required. The main advantage of foam concrete production is its unlimited variety of desired properties, which must be properly balanced for a specific application and its interacting structure. Produced FC can have unit weight from 300 to 900 kg.m-3, compression strength from 0.4 to 12 MPa, elasticity modulus from 1200 to 2500 MPa and coefficient of thermal conductivity from 0.15 to 0.30 W.m-1K-1. Thanks to these properties, FC can be used for the construction of foundation slabs of passive houses, as a sub-base layer of industrial floors and as a filling material of narrow excavated shafts. As for concrete, reinforcement can improve tensile properties, but due to corrosion, iron bars or nets must be replaced by special material bars, nets, geogrids or geotextiles. For the mentioned type of structures and loading of FC layers, the importance of laboratory and in-situ testing is crucial. This article presents laboratory tests of one of the selected parameters, which is flexural strength of FC in various unit weights, and demonstrates a significant improvement of strength when non-woven geotextile and mesh type reinforcement was used. Use of geotextile at the bottom part of samples increased flexural strength from 30 to 60%, mesh reinforcement can have doubled basic flexural strength. Crack propagation with respect to time was also observed during tests in order to compare the results of reinforced FC with no reinforced layer.

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Section: Foam Concretementioning

confidence: 99%

Testing of Foam Concrete for Definition of Layer Interacting With Subsoil in Geotechnical Applications

Drusa¹

2019

GEOMATE

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“…It must be underlined that most of the mechanical impact on industrial floors are somehow related to non-uniform geotechnical conditions under the floor slab. The importance of proper evaluation of ground properties [3] and some examples of slab testing [4] can be found in many references. The authors of the current study focus on impacts on cover layer.…”

Section: Resistance Of Floors To Various Impactsmentioning

confidence: 99%

Durability of polyurethane - cement floors

2018

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The products covered by the common name polyurea were first developed and marketed in the United States in the 1980’s In the first period polyurea was used as a protective coating of polyurethane foam used for thermal insulation of roofs, and in the 1990s many other uses were quickly disseminated. In Europe this technology appeared in the second half of the nineties and the market for polyurea applications started to develop very dynamically in the recent years. Polyurea coatings, due to their extremely versatile physical properties such as watertightness, extremely high wear resistance, resistance to chemical and mechanical stresses, high elasticity and stretchability as well as resistance to freeze-thaw cycles, are increasingly popular, and more and more frequently used in the broadly understood construction. As a rule, the growing demand for technology fosters its development and enhances the knowledge of those who use it, so that it is used for its intended purpose, while maintaining security and enforcement procedures. However, in the absence of such knowledge, misconceptions about the use of polyurea spray coating technologies are emerging, both at the design stage and during the execution phase.

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“…Rum et al [32] used foamed concrete as a component in a profiled composite slab. Kadela et al [33][34][35], Drusa et al [36][37][38], Tian et al [39] and Lee at al. [40] used foamed concrete in a pavement or floor structure to transmit a load on a subsoil, including weak soil.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Lightweight Concrete Based on a Synthetic Polymer Foaming Agent

2020

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The components of foamed concrete have a significant effect on its properties. Protein-based foamed concrete is used much more often. This study aims to assess the properties of foamed concrete with a density of around 500, 700, 800 and 1000 kg/m3 formed by using a synthetic polymer-based foaming agent. The distribution of pores, wet and dry density and compressive strengths were evaluated. In addition, the creep deformations of foamed concrete with different densities were measured. The difference in density of up to 170 kg/m3 for the highest densities was obtained. Foamed concrete with higher densities (700 and 800 kg/m3) showed similar characteristics of pores, which were different from those of samples with a density of 500 kg/m3. Compressive strength equal to 5.9 ± 0.2, 5.1 ± 0.2, 3.8 ± 0.3 and 1.4 ± 0.2 MPa was obtained for foamed concrete with a density of 500, 700, 800 and 1000 kg/m3, respectively. The obtained compressive strengths were higher than those found in the literature for the foamed concrete with the same densities. With increasing density, smaller creep deformations were obtained. Creep deformations were 509, 495 and 455 με for samples with densities of around 500, 700 and 1000 kg/m3 respectively. Deformation under long-term loading took place up to 90 days, regardless of the density of the foamed concrete.

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Experimental Investigation of Properties of Foam Concrete for Industrial Floors in Testing Field

Cited by 10 publications

References 9 publications

Testing of Foam Concrete for Definition of Layer Interacting With Subsoil in Geotechnical Applications

Testing of Foam Concrete for Definition of Layer Interacting With Subsoil in Geotechnical Applications

Durability of polyurethane - cement floors

Characteristics of Lightweight Concrete Based on a Synthetic Polymer Foaming Agent

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