Mechanical properties of lightweight foamed concrete modified with magnetite (Fe3O4) nanoparticles

Mydin, Md Azree Othuman and Nawi, Mohd Nasrun Mohd and Mohamed, Othman and Sari, Marti Widya (2022) Mechanical properties of lightweight foamed concrete modified with magnetite (Fe3O4) nanoparticles. Materials, 15 (17). ISSN 1996-1944, DOI

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The advancement in sustainable construction has stimulated wide-ranging investigation of construction materials and practices globally. With exceptional thermal properties, fire resistance performance, excellent strength, and outstanding durability, concrete is the utmost extensively utilized construction material around the world. Taking into consideration the quantity of concrete necessary for numerous constructions works, improving concrete sustainability would be an extremely attractive potential. Lightweight foamed concrete (LFC) is tremendously permeable, and its mechanical properties weaken with a growth in the volume of voids. Air-void segregation from solid cement phases by means of aging, drainage, and merging of voids can trigger and reduce the stability and consistency of the emitted pores, making the LFC less reliable for main utilization in load-bearing components and structural elements. In turn, to augment LFC mechanical properties, the LFC cementitious matrix can be adjusted by adding various nanoparticles. The influence of magnetite nanoparticles (MNP) in LFC was not examined in the past; hence, there is some vagueness considering the mechanism to which level the MNP can affect the LFC mechanical properties. Thus, the aim of this study is to investigate the influences of MNP on the compressive, splitting tensile, and flexural LFC of 1000 kg/m(3) density. Six MNP weight fractions of 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, and 0.35% were considered. The parameters accessed were compressive, splitting tensile and flexural strengths. The correlation between strength parameters was established as well. The results indicated that a 0.25% weight fraction of MNP gave the best performance in terms of compressive, flexural, and splitting tensile strengths. The presence of MNP in the LFC matrix enhances the viscosity and yield stress of the mixture as well as an augmented utilization of LFC cementitious binder content, which can sustain the integrity of the wet networks hence preventing further amalgamation and aging of the voids.

Item Type: Article
Uncontrolled Keywords: Lightweight foamed concrete; Magnetite nanoparticles; compressive strength; Flexural
Subjects: Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of the Built Environment
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 19 Sep 2023 02:12
Last Modified: 19 Sep 2023 02:12

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