UNCONVENTIONAL TECHNIQUE USED TO MANUFACTURE POROUS HIGH-STRENGTH GLASS FOAM
LUCIAN PAUNESCU(*1), SORIN MIRCEA AXINTE(1,2), MARIUS FLORIN DRAGOESCU(2), BOGDAN VALENTIN PAUNESCU(3), FELICIA COSMULESCU(4)
1. Daily Sourcing & Research SRL, 95-97 Calea Grivitei, sector 1, Bucharest 010705, Romania 2. University “Politehnica” of Bucharest, Faculty of Applied Chemistry and Materials Science, 1-7 Gh. Polizu street, sector 1, Bucharest 011061, Romania 3 Consitrans SA, 56 Polona street, sector 1, Bucharest 010504, Romania 4 Cosfel Actual SRL, 95-97 Calea Grivitei, sector 1, Bucharest 010705, Romania * Corresponding author, email: lucianpaunescu16@gmail.com
Abstract
The paper presents experimental results obtained in the manufacturing process of porous high-strength glass foam for thermal insulation in buildings made of glass waste and kaolin clay as raw materials and dolomite as a foaming agent. The paper’s originality is the use of the unconventional microwave heating technique. The best product manufactured by this technique was that sintered at 1050 ºC using 18 wt.% kaolin clay and 3.5 wt.% dolomite. The product characteristics were: the apparent density of 0.66 g·cm-3, the thermal conductivity of 0.155 W/m·K, the compressive strength of 5.3 MPa and a microstructural homogeneity with pore size between 0.20-0.50 mm.