ACOUSTIC ABSORPTION OF GEOPOLYMER/SAND MIXTURE

The acoustic absorption coefficient of material by geopolymer joining agent filled by sand is The geopolymer defined as a clay based inorganic 3D net was used as a substitute of epoxide resin, industrially used cementing material of granular (generally quartz sand). The absorption of a conventionally used epoxide/sand sample was with geopolymer/sand mixtures. The main target to find the alternative joining matter caused by costs of epoxide resin and its flammability. The of filling agent in geopolymer matrix (quantity sand and its fractionation) on the acoustic coefficient and the influence of thickness of the mixture are discussed. The acoustic absorption was defined within the range 100-2500 Hz. Both had specific sound absorbing properties - average of coefficient with broader range of and high absorbing coefficient with narrow of effective frequencies.