Effect of high titanium blast furnace slag on preparing foam glass–ceramics for sound absorption

Abstract

Foam glass–ceramics for sound absorption were fabricated via a single-sintering method with high titanium blast furnace slag (HTBFS) and waste glass as the main materials. This study investigated the effects of HTBFS content on the microstructure and properties of foam glass–ceramics. The results show that the main phases of the sintered samples are diopside, perovskite and augite. With increasing HTBFS content from 38 to 48 wt%, the shape of crystals changes gradually and the crystallinity of the sintered samples decreases firstly and then increases, the bulk density and compressive strength increase, the porosity and open porosity decrease. All sintered samples have good sound absorption and corrosion resistant characteristics. The optimal properties, including the highest noise reduction coefficient (0.41) and a relatively high compressive strength (10.5 MPa) of the sintered samples, are prepared with 46 wt% HTBFS content. This research finds a new purpose of waste slag and expands the application range of foam glass–ceramics for sound absorption, especially sound barrier using in the traffic network because of a relative high impressive strength.