Preparation of high-performance thermal insulation composite material from alkali-activated binders, foam, hollow glass microspheres and aerogel

Li, Xiang; Cui, Dawei; Zhao, Yuan; Qiu, Ruoxiang; Xue-min, Cui; Wang, Kaituo

doi:10.1016/j.conbuildmat.2022.128493

Cited by 20 publications

(2 citation statements)

References 60 publications

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“…The fluidity of the slurry is often characterized by its expansion degree, and extensive research has been conducted by scholars [ [30] , [31] , [32] , [33] , [34] ]. For the unfoamed filling slurry, the main factors affecting its fluidity include temperature, binder content, solid particle size, solid mass concentration, mineral additives, and chemical additives [ [35] , [36] , [37] ]. However, there are relatively few studies have been conducted on the fluidity of foamed AASCM, and the mechanisms underlying its effects on fluidity are not yet clear.…”

Section: Introductionmentioning

confidence: 99%

Study on the fluidity of foamed alkali-activated slag cementitious material (AASCM)

Yu,

Ma,

Ngo

et al. 2023

Heliyon

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Section: Introductionmentioning

confidence: 99%

Study on the fluidity of foamed alkali-activated slag cementitious material (AASCM)

Yu,

Ma,

Ngo

et al. 2023

Heliyon

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“…16 When incorporated into composite matrices, fly ash hollow cenospheres hold the potential to impart desirable attributes such as reduced overall density, improved specific strength, and even enhanced fire retardancy, opening exciting avenues for tailoring the mechanical behavior of flax fiber-reinforced polymer composites. [17][18][19] Studies have indicated that the addition of fly ash hollow cenospheres to plant fiber-reinforced polymer composites can positively influence the static mechanical properties, including tensile strength, modulus of elasticity, and flexural strength. [20][21][22][23] The unique combination of plant fibers and fly ash hollow cenospheres presents an opportunity for achieving a balance between strength and lightweight.…”

Section: Introductionmentioning

confidence: 99%

Enhancing dynamic viscoelastic performance of flax fiber/fly ash hollow cenosphere‐reinforced composites coated by in situ fabrication of ultrasonically synthesized nanotitanium dioxide

Wang,

Noman,

Petrů

et al. 2024

J of Applied Polymer Sci

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This study demonstrates a novel, single‐step, and low‐energy ultrasonic approach to fabricate lightweight, high‐performance flax fiber‐reinforced composites enhanced by nanotitanium dioxide coating and fly ash hollow cenospheres. This innovative approach leads to a remarkable 23% weight reduction compared with conventional composites, making it ideal for the applications demanding both lightweight and superior mechanical properties. Through dynamic mechanical testing, it is found that the composites' viscoelastic behavior, including storage modulus and damping factor, is significantly influenced by both frequency and temperature. By applying time–temperature superposition principles, the composite's dynamic properties are comprehensively characterized across a wider frequency range. A modified fractional calculus Huet–Sayegh model accurately captures the observed viscoelastic behavior. The combined effect of nanotitanium dioxide coating, which strengthens the fiber–matrix interface, and the inclusion of rigid fly ash hollow cenospheres results in significant improvements in both storage modulus (10% increase at room temperature) and peak loss factor (80% increase) compared with uncoated flax fiber‐reinforced composites. The nanocoating and cenospheres' rigid shells contribute to enhanced stiffness, while the cenospheres' hollow structure provides efficient energy dissipation mechanisms, leading to an improved damping performance. This ultrasonic approach offers a promising and sustainable method for synthesizing natural fiber nanocomposites with superior viscoelastic properties.

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A Novel Concrete Mix Design Methodology

Kumar¹,

Alam²,

Sanjayan³

2023

Lecture Notes in Civil Engineering

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Concrete mix design is the methodology for mixing binder, aggregate and water to achieve required physical, mechanical, and thermal properties. In particular, the physical properties depend on the volume fraction of each element in the concrete recipe. In this study we considered cement mortar, complying with ASTM C105, as the reference concrete with cement as the binder and silica sand as the aggregate. The reference mortar was denser with high thermal conductivity and compressive strength at given rheological properties. A denser concrete presents difficulty in material handling and imposes a safety risk, and high thermal conductivity increases building energy consumption. Therefore, lightweight concrete (LWC) has been developed by replacing silica sand with porous materials. LWC includes cement as the binder, with silica sand and other porous materials as the primary and binary fillers. The mass of the filler materials is determined by their particle density and volume fraction. LWC has low thermal mass, thereby exacerbating the summertime overheating and peak cooling demand of buildings. Therefore, there is a need to design a LWC with high thermal mass by incorporating phase change materials (PCM), which are mainly incorporated as tertiary filler. Here, we propose a novel concrete mix design methodology to incorporate PCM composite as a partial replacement of the porous material without changing binding materials.

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Preparation of high-performance thermal insulation composite material from alkali-activated binders, foam, hollow glass microspheres and aerogel

Cited by 20 publications

References 60 publications

Study on the fluidity of foamed alkali-activated slag cementitious material (AASCM)

Study on the fluidity of foamed alkali-activated slag cementitious material (AASCM)

Enhancing dynamic viscoelastic performance of flax fiber/fly ash hollow cenosphere‐reinforced composites coated by in situ fabrication of ultrasonically synthesized nanotitanium dioxide

A Novel Concrete Mix Design Methodology

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