Experimental and computational characterization of glass microsphere-cementitious composites

Scott, Nicholas R; Stoddard, Damian; Nelms, Matthew; Wallace, Zachary J.; Turner, I G; Turner, Lena; Croom, Megan; Franklin, Katelyn; Sandifer, Samantha; Al-Fahdi, Mohammed; Butler, Tyler; Rajendran, A. M.

doi:10.1016/j.cemconres.2021.106671

Cited by 13 publications

(3 citation statements)

References 10 publications

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“…The data is used to calculate the percentage of microspheres collapsed versus the applied pressure. Despite its early withdrawal, the method is still used by glass beads, microbubbles, and microspheres [50,74,75] manufacturers as the primary mechanical test, usually expressed as maximum pressure for survival of 90% of the particles. The crushing resistance (C) is calculated by the following equation:…”

Section: Vibrating Table Settingsmentioning

confidence: 99%

Insights in the Physicochemical and Mechanical Properties and Characterization Methodology of Perlites

Angelopoulos

2024

Minerals

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Perlite is a volcanic glass that, under thermal treatment, expands, producing a highly porous and lightweight granular material which finds application in the construction, horticulture, insulation and other industrial sectors. Proper control of the feed properties and the expansion conditions allows the production of purpose-oriented grades, while the primary evaluation of its appropriateness for use in each sector is performed by the proper characterization of relevant physical, thermal or/and mechanical properties. However, due to its extreme fineness, low density, and friability, most of the available characterization methods either fail in testing or provide erroneous results, while for certain properties of interest, a method is still missing. As a consequence, the way towards the evaluation of the material is rife with uncertainties, while a well-defined methodology for the characterization of the critical properties is of practical importance towards the establishment of a pathway for its proper analysis and assessment. This article presents the available methodology for determining the main properties of interest, i.e., the size and density, water repellency/absorption and oil absorption, the microstructural composition, crushing and abrasion resistance and isostatic crushing strength, and also sampling and size reduction processes. The issues raised by the application of existing methods are analyzed and discussed, ending up to a proper methodology for the characterization of each property, based on the long-term experience of the Perlite Institute. The study is supplemented by updated insights on ore genesis, physicochemical properties, mineralogical composition and the expansion mechanism, as background information for the sufficient comprehension of the nature and properties of perlite.

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Section: Vibrating Table Settingsmentioning

confidence: 99%

Insights in the Physicochemical and Mechanical Properties and Characterization Methodology of Perlites

Angelopoulos

2024

Minerals

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“…For example, Swetha and Kumar [1] used a series of quasi-static uniaxial compression experiments to investigate the effects of hollow microsphere doping content, and mircosphere wall thickness on the mechanical properties of foams. R. Scotta [2] studied the effect of glass microsphere on the weight reduction properties of cementitious composites and the compressive strength of glass microsphere reinforced cementitious composites at quasi-static, high strain rates. F Blanco [3] showed that the compressive strength of lightweight cementitious materials was larger than that of ordinary perlite lightweight cement after incorporation of hollow microsphere.…”

Section: Introductionmentioning

confidence: 99%

Simulation of interfacial debonding in hollow particle-reinforced composites with VCFEM

Wang,

Zhang

2024

Preprint

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The addition of hollow glass miscrosphere into composites is a method to improve mechanical properties. However, the interfacial debonding of hollow miscrosphere inevitably causes a decrease in the mechanical properties of the material, which ultimately leads to the failure of the composites. In the numerical simulation of such hollow particle-reinforced composites, the ordinary displacement finite element requires a large number of meshes, which undoubtedly greatly increases the computational cost. In this paper, a new VCFEM is proposed to solve this problem by establishing a two-dimensional Voronoi cell finite element model, deriving the residual energy generalized function of hollow particle-reinforced composites, and calculating the interface debonding. The simulation results are compared with the commercial software MARC, ABAQUS to verify the effectiveness of this VCFEM. The results show that this VCFEM greatly improves the computational efficiency while ensuring the accuracy. Based on this model, this paper also investigates the effect of the generation of interfacial debonding on the overall structure and the effect of different wall thickness of hollow particles on the damage of element debonding.

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“…Hollow microspheres are a component of concrete that allow you to solve this problem because they have a lower density than expanded clay, for example. The effectiveness of using hollow glass or ceramic micro-sized particles to produce concrete is shown in [28][29][30][31][32][33]. There is a precedent [28] for producing high-strength lightweight concrete compositions based on hollow microspheres with a specific strength of up to 50 MPa.…”

Section: Introductionmentioning

confidence: 99%

Conditions for the Preparation of Self-Compacting Lightweight Concrete with Hollow Microspheres

Inozemtcev,

Epikhin

2023

Materials

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Producing self-compacting concrete with lightweight aggregates is a difficult task. Mixtures with a high content of expanded aggregate tend to separate. It is possible to evaluate the possibility of producing self-compacting lightweight concrete with low average density. This work presents the results of a study of self-compacting lightweight concrete on hollow microspheres. The ability of a lightweight concrete mixture on hollow microspheres with low density (ρ = 1450 ± 25 kg/m3) to self-compact has been established. The closeness in the values of the spreading diameter before and after shaking on the table Dsp,1 → Dsp,2 confirms this. The dependences (regression equations) of mobility, coefficients of the Ostwald–Weil equation, and density and strength on the W/C ratio and plasticizer concentration for lightweight concrete with a volume content of hollow microspheres of 46.4% have been established. The limits for homogeneity of lightweight concrete mixtures on hollow microspheres are W/C ≤ 0.6 and CPl ≤ 1.0%. The dispersion of quartz sand (varying the Sp/Sf ratio) in an amount of 8.7% in the composition of lightweight concrete does not have a significant effect on the self-compaction criterion and physical and mechanical properties. Changes in the physical and mechanical properties of lightweight concrete on hollow microspheres in the selected range of varying the W/C ratio and plasticizer concentration are in the following ranges: ρ = 1403–1485 kg/m3, Rfl = 3.34–5.90 MPa, Rcom = 29.6–45.7 MPa. The presence of delamination at W/C ≥ 0.6 does not allow one to correctly establish the influence of variable factors.

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Experimental and computational characterization of glass microsphere-cementitious composites

Cited by 13 publications

References 10 publications

Insights in the Physicochemical and Mechanical Properties and Characterization Methodology of Perlites

Insights in the Physicochemical and Mechanical Properties and Characterization Methodology of Perlites

Simulation of interfacial debonding in hollow particle-reinforced composites with VCFEM

Conditions for the Preparation of Self-Compacting Lightweight Concrete with Hollow Microspheres

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