MICROWAVE MANUFACTURE OF GLASS FOAM BY COMBINED USE OF GRAPHITE AND CALCIUM CARBONATE AS FOAMING AGENTS

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LUCIAN PAUNESCU
SORIN MIRCEA AXINTE
MARIUS FLORIN DRAGOESCU
BOGDAN VALENTIN PAUNESCU
FELICIA COSMULESCU

Abstract

The paper presents experimental results obtained in the manufacturing process of high-strength glass foam by combined use of two solid foaming agents (calcium carbonate and graphite) in variable weight ratios. The originality of the work is applying the unconventional microwave heating method, unlike the conventional techniques currently used in similar industrial processes. The optimal experimental variant, composed of 89.1 % glass waste, 0.9% calcium carbonate, 1 % graphite and other additives, was sintered at 828 ºC with a very low energy consumption (0.73 kWh/kg). The main characteristics of the optimal product were apparent density of 0.39 g/cm3, thermal conductivity of 0.088 W/m·K and compressive strength of 3.6 MPa, being usable in fields that requires resistance to mechanical stress and relatively difficult environmental conditions.

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How to Cite
PAUNESCU, L., AXINTE, S. M., DRAGOESCU, M. F., PAUNESCU, B. V., & COSMULESCU, F. (2021). MICROWAVE MANUFACTURE OF GLASS FOAM BY COMBINED USE OF GRAPHITE AND CALCIUM CARBONATE AS FOAMING AGENTS. Journal of Engineering Studies and Research, 27(1), 110-119. https://doi.org/10.29081/jesr.v27i1.260
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Author Biographies

LUCIAN PAUNESCU

Daily Sourcing & Research SRL, 95-97 Calea Grivitei, sector 1, Bucharest 010705, Romania

SORIN MIRCEA AXINTE

Daily Sourcing & Research SRL, 95-97 Calea Grivitei, sector 1, Bucharest 010705, Romania

University “Politehnica” of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7 Gh. Polizu street, sector 1, Bucharest 011061, Romania

MARIUS FLORIN DRAGOESCU

University “Politehnica” of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7 Gh. Polizu street, sector 1, Bucharest 011061, Romania

BOGDAN VALENTIN PAUNESCU

Consitrans SA, 56 Polona street, sector 1, Bucharest 010504, Romania

FELICIA COSMULESCU

Cosfel Actual SRL, 95-97 Calea Grivitei, sector 1, Bucharest 010705, Romania

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