Dynamic characteristics and response analysis of a new type of prefabricated fly ash foam concrete structure

Hao, Yunhong; Wang, Hongze; Qin, Lida; Hou, Yongli; Shi, Yong

doi:10.1016/j.istruc.2023.105074

Cited by 6 publications

(1 citation statement)

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“…The addition of ash of more than 40% leads to a fairly strong loss of strength and a significant deterioration in other characteristics. In general, the use of fly ash in foam concrete is justified and, with the correct selection of the formulation, allows one to obtain composites with improved thermal insulation characteristics and lower density while maintaining an acceptable reduction in compressive strength, which is also confirmed by a number of the following studies [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 73%

Structural Formation and Properties of Eco-Friendly Foam Concrete Modified with Coal Dust

Stel’makh,

Shcherban’,

Beskopylny

et al. 2023

J. Compos. Sci.

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Foam concrete is a popular energy-efficient construction material with a fairly wide range of usage in buildings and structures. Increasing ecological efficiency and reducing construction costs by the application of different types of industrial waste in the manufacturing technology of this composite is a promising direction. The main goal of this study is to investigate the possibility of coal dust (CD) waste inclusion in the technology of energy-efficient cellular concrete produced by foam concrete technology. Test samples of foam concrete were made using coal dust by partially replacing cement in the range of 0–10% in increments of 2%. The following primary characteristics of foam concrete were studied: fluidity of mixtures; compressive strength; density; thermal conductivity of foam concrete. An X-ray diffraction analysis of foam concrete composites was performed, which showed changes in their phase composition when using coal dust as a modifier. Coal dust in rational quantities from 2% to 6% improves the physical and mechanical characteristics of foam concrete and increases the structure uniformity. The optimal values of the foam concrete characteristics were recorded at a dosage of coal dust of 6%. At the same time, the density decreased by 2.3%, the compressive strength increased by 15.6%, and the thermal conductivity coefficient decreased by 8.9% compared to the ordinary composition. The use of the resulting foam concrete is advisable in enclosing structures to create high energy efficiency of buildings and structures due to the improved structure and properties.

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