Disperse reinforced concrete with powdered basalt waste

The purpose of this work was to develop a composition for non-autoclaved aerated concrete reinforced with powdered basalt waste (PBW) and fibrous basalt waste (FBW). PBW in the form of powder with a specific surface area of 346 m2/kg, true density of 2180 kg/m3 was used as mineral micro filler. Its chemical composition as defined by Quanta 200 scanning microscope with Apollo 40 detector for elemental analysis using energy dispersive spectroscopy (the main component being SiO2) and a large specific surface area can improve the strength of aerated concrete. FBW was used as disperse reinforcement of aerated concrete. It consisted of fibers 50-70 μm thick, about 4 - 6 mm long. With the FBW in the aerated concrete, the strength of the latter increases, and cracking is reduced due to good adhesion to the cement matrix. The pilot composition of non-autoclaved aerated concrete containing PBW and FBW was developed, with a compressive strength of 1.4 MPa and an average density of 600 kg/m3.

Author: V.V. Belov, Rushdie Ahmed Ali

Section: Waste utilization

Keywords: not autoclave gas concrete, superplastisizer SP-1, dust-like basalt waste, not autoclave gas concrete, fibrous basalt waste, crack resistance, strength coefficient