Abstract
The effect of the concentration (from 18 to 6 %) of an alkaline activator (AA) solution on the viscosity and basic properties of geopolymer composites based on chamotte with additives of foam glass production waste, multi-walled carbon nanotubes (MWCNT) and air-entraining additive (AEA) after heat treatment at different temperatures. In specimens with АЕА, the density decreases from 1600 to 1240 kg/m3, strength from 20.0 to 2.6 MPa and shrinkage from 5.9 to 1.5 % after firing at a temperature of 1000 °C. Combined use of АЕА and MWCNT allows to increase strength up to 7.9 – 10.3 % and reduce specimen shrinkage up to 16.0 – 8.2 %.
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