scholarly journals Modelling and Characterization of Effective Thermal Conductivity of Single Hollow Glass Microsphere and Its Powder

Materials ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 133 ◽  
Author(s):  
Bing Liu ◽  
Hui Wang ◽  
Qing-Hua Qin
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Glass Microsphere ◽  
Hollow Glass Microsphere ◽  
Hollow Glass

Effect of Hollow Glass Microsphere on Performance of Foam Concrete

2013 ◽  
Vol 539 ◽  
pp. 64-69 ◽  
Author(s):  
Qing Wang ◽  
Lin Ge Qiu ◽  
Qi Yao ◽  
Zhao Yang Ding ◽  
Xi Fan Yan
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Negative Relationship ◽  
High Strength ◽  
Glass Microsphere ◽  
Dry Density ◽  
Hollow Glass Microsphere ◽  
Foam Concrete ◽  
Hollow Glass ◽  
Good Thermal Stability

Dry density and compression strength of foam concrete are conflicting, there is a negative relationship between them. Hollow glass microsphere is a new lightweight material which is lightweight, high strength, low thermal conductivity and good thermal stability. In order to prepare lightweight and high-strength foam concrete, this paper researched the effects of different dosage on dry density and compressive strength of foam concrete through adding hollow glass microspheres. The results show that the thermal conductivity of foam concrete increased as the hollow glass microsphere increases, and the dry densities of foam concrete are between 120-200 kg•m-3, compressive strength reaches 0.1MPa.

Concrete with Addition of Hollow Glass Microspheres

2015 ◽  
Vol 820 ◽  
pp. 509-514
Author(s):  
Cindy Yuri Ueki Peres ◽  
Antonio Hortêncio Munhoz ◽  
L.F. Miranda ◽  
A. Cabral Neto ◽  
A.R. Zandonadi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Glass Microsphere ◽  
Hollow Glass Microsphere ◽  
Glass Microspheres ◽  
Hollow Glass Microspheres ◽  
High Mechanical Strength ◽  
Hollow Glass ◽  
Glass Spheres ◽  
Concrete Mix

The addition of hollow glass spheres is interesting to reduce the thermal conductivity of the concrete pieces. This work aims to evaluate the concrete with addition of hollow glass microsphere with different combinations of dosage in concrete concerning strength and workability. Slump tests were performed in each dosage of concrete in order to evaluate the effect of glass microspheres in concrete mix. In each age of curing concrete, bodies-specimens underwent ultrasound to estimate the homogeneity of concrete with hollow glass microspheres, and testing of compressive strength. The analysis of the results shows that for some formulations, the addition of hollow glass microspheres imparts high mechanical strength to compressive strength above 30MPa at all analyzed cure periods. The workability of the concrete had to be substantially reduced, showing no workability improvement due to the addition of hollow glass microsphere.

scholarly journals Preparation and Characterization of Furan–Matrix Composites Blended with Modified Hollow Glass Microsphere

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1480
Author(s):  
Yizhe Ma ◽  
Ying Du ◽  
Jin Zhao ◽  
Xubo Yuan ◽  
Xin Hou
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Flame Retardancy ◽  
Particle Dispersion ◽  
Glass Microsphere ◽  
Resin Matrix ◽  
Hollow Glass Microsphere ◽  
Limiting Oxygen Index ◽  
Hollow Glass ◽  
Furan Resin

In this study, a new class of thermal insulation composites was prepared by blending a modified hollow glass microsphere (HGM) with furan resin. The particle dispersion between the microparticles and resin matrix was improved using 3-methacryloxypropyltrimethoxy silane (KH-570). Furthermore, the structure and morphology of the modified HGM were characterised by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). In addition, the effects of the modified HGM on the thermal insulation, flame retardancy, and thermal properties of the composites were investigated. The thermal conductivity of the composites was lower than that of the native furan resin. The minimum thermal conductivity of the composites was 0.0274 W/m·K; the flame retardancy of the composites improved, and the limiting oxygen index become a maximum of 31.6%, reaching the refractory material level. Furthermore, the thermal analysis of the composites demonstrated enhanced thermal stability. This study demonstrates that the composite material exhibited good thermal insulation performance and flame retardancy and that it can be applied in the field of thermal insulation.

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