Colloidal nanosilica is currently being produced by various methods which are mainly high energy intensive and/or not environmentally friendly. It is therefore essential to develop new energy-efficient and environmentally friendly technologies. This paper introduces a new ultrasound assisted route based on alkali leaching of silica fume for synthesis of colloidal silica nanoparticles. The ef...

This paper investigates the effectiveness of two zeolites with different reactive silica content, fly ash (FA), blast furnace slag (BFC), silica fume (SF), and micronized calcite (MC) in reducing expansion of concrete due to alkali-silica reaction. Also in this research, effects of three different cement usages were investigated by using accelerated mortar bar method, ASTM C1260. Five different...

In order to reduce the carbon emission of planting concrete in process preparation, and realize application large amounts red mud geopolymer, this study, high silicon source materials blast furnace slag are added a content base geopolymer concrete, which can remove dependence on ordinary Portland cement provide new direction for comprehensive utilization mud. paper, effects different A (Alkali ...

The fireproof design of geopolymers through adjusting multi-component metallurgical solid wastes has attracted increasing attention, due to their potential low carbon emission, cost effectiveness, and role in environmental conservation. Herein, the effects silica fume (SF) on microstructure mechanical properties alkali-activated slag/FA (fly ash) pastes subjected elevated temperatures (150, 500...