Investigation on properties of aerated concrete with foundry sand as replacement for fine aggregate

Selvakumar, M.; Geetha, S.; Lakshmi, S. Muthu

doi:10.1016/j.matpr.2022.04.709

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…Next, we compare our results with the results of other authors. The authors of [40][41][42] suggested using prescription factors to improve the physical and mechanical properties of aerated concrete; the increase in compressive strength ranged from 16% to 22%. In the present study, the increase in the strength of aerated concrete due to prescription factors in comparison with the control composition was up to 46%.…”

Section: Discussionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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At present, the load-bearing enclosing structures of buildings and structures are designed and built considering the increasing requirements for energy efficiency and energy saving of such structures. This is due to the need for a thrifty attitude to the energy consumed and the need to strive for the greening of construction and increase the energy efficiency of buildings and structures. In this regard, one of the most effective and proven building materials is cellular concrete. The purpose of this study was to study the influence of some prescription factors on the structure formation and properties of non-autoclaved aerated concrete with improved characteristics. Standard test methods were used, as well as SEM analysis of the structure of aerated concrete. Non-autoclaved aerated concrete with the replacement of part of the cement with microsilica in an amount from 4% to 16% MS showed higher strength characteristics compared to aerated concrete, where part of the cement was replaced by the addition of granulated blast-furnace slag and a complex additive. The maximum value of compressive strength was recorded for aerated concrete with 16% MS addition. The largest increase in the coefficients of constructive quality was observed in compositions of aerated concrete with the addition of silica fume from 11% to 46% compared with the control composition. The addition of microsilica makes it possible to achieve an improvement in the thermal conductivity characteristics of non-autoclaved aerated concrete (up to 10%). Replacing part of the cement with slag and complex additives does not have a significant effect on thermal conductivity. The obtained dependencies were confirmed by the analysis of the structure formation of the studied aerated concrete at the micro level. An improvement in the microstructure of aerated concrete with the addition of microsilica in comparison with samples of the control composition has been proven.

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Section: Discussionmentioning

confidence: 99%

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

et al. 2022

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“…Among the important characteristics of this material, its density stands out, since it is very light and varies from 12.00 to 80.00 kg/m 3 (Machado et al, 2019;Parra et al, 2019). In addition, it is a material that has gained great popularity in the construction industry (Marques et al, 2019), so today its use in this area is gradually increasing, especially for the production of normal and lightweight concrete (Ioana et al, 2023;Ngassam et al, 2018); including partial replacement of aggregates (Selvakumar et al, 2022); also, to establish lightweight and ultralight concrete (Serelis & Vaitkevicius, 2022;Sldozian et al, 2023); similarly, for the production of lightweight concrete blocks (Carneiro et al, 2020) and even to reduce noise, using lightweight concrete for subfloors (Pacheco et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Mechanical Properties of Structural Concrete Using Microporous Ethylene Vinyl Acetate

Chaname,

García,

Arriola Carrasco

2024

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Over the years, the world has tried to increase the recycling of materials, especially those of artificial origin, this in order to produce compounds that are sustainable and sustainable. Among these materials, concrete stands out as a versatile element, to which different external agents can be added; however, since many of them are not compatible with aggregates, cement or water, can cause some alterations in their mechanical performance. Therefore, the present investigation addressed the study of an artificial material called Microporous Ethylene Vinyl Acetate (MEVA), in order to evaluate its influence on the mechanical properties of structural concrete. MEVA additions were used in ranges of 5.00 %, 10.00 %, 15.00 % and 20.00 % with respect to the volume of concrete, to analyze its behavior in the mix, both in physical and mechanical properties. The results show that the workability and unit weight are affected by the increase in MEVA. Despite this, the mechanical performance showed significant increases in the compressive strength of 8.81 %, tensile of 22.86 %, flexion of 24.51 % and modulus of elasticity of 2.12 %, with the addition of 5.00 % of MEVA after 28 days. Nevertheless, at higher doses there is a reduction in said strengths. For these reasons, it is concluded that the incorporation of MEVA at 5.00 % greatly improves the mechanical properties of concrete for structural use, in relation to the theoretical design strength of 21.00 MPa.

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“…The minerals of the tobermorite group occur in several modifications: in the form of a crystalline component (tobermorite with basal spacing in the range 9.3 Å-14 Å) with the shape of flat leaves or slats (rarely as fibers), further in an imperfectly crystalline form such as C-S-H (I) a C-S-H (II) and also in the form of a tobermorite gel [6]. It is possible to use secondary raw materials in the material preparation, for example, the foundry sand [7], iron tailings [8], and coal gangue [9], different types of energy by-products (high-temperature fly ash [10] and fluidized bed combustion fly ash [11]), waste glass [12], and so forth. Some authors describe possibilities of fiber-based secondary raw materials use, for example, wood fibers [13,14], polyethylene terephthalate fibers [15,16], or fly ash containing fibrous particles [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of alternative fibre‐like secondary raw materials utilization by the preparation of the aerated autoclaved concrete

Mészárosová,

Černý,

Melichar

et al. 2023

ce papers

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This article is dedicated to the possibilities of using new alternative raw materials in the structure of aerated autoclaved concrete. Primary sources of raw materials are exhaustible and their price is increasing. According to the ecological requirements of the European Union, it is necessary to find many more ecological ways how to produce building materials. Production of aerated autoclaved concrete is for such utilization potentially suitable. It is well known, that the partial replacement of siliceous constituents is possible. This article is focused on the use of dispersed siliceous waste material with fiber‐like grains (e.g., waste fibers from the production of reinforcement fabrics and glass). The input raw materials are standard aerated autoclaved concrete based (cement, lime, silica sand). As an aerating agent was the aluminum powder. This article is dedicated to the determination of basic physical‐mechanical properties and a suitable amount of filler determination. The amount was determined on the basis of the constructive quality coefficient. It seems that partial replacement of the siliceous constituent by fiber‐like materials leads to improvement of properties.

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Investigation on properties of aerated concrete with foundry sand as replacement for fine aggregate

Cited by 4 publications

References 18 publications

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Influence of Recipe Factors on the Structure and Properties of Non-Autoclaved Aerated Concrete of Increased Strength

Improvement of the Mechanical Properties of Structural Concrete Using Microporous Ethylene Vinyl Acetate

Effect of alternative fibre‐like secondary raw materials utilization by the preparation of the aerated autoclaved concrete

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