Research on Non-autoclaved Fly Ash Lightweight Wall Block with Material Properties

摘要

Non-autoclaved fly ash lightweight wall block with industrial waste fly ash as main raw material enhance the activity of fly ash by mechanical activation at the normal temperature and pressure, and through adding activator sodium silicate, gypsum, sodium sulfate for chemical activation. Experiments show that the effect of complex excitation is better than single excitation. The quality and quantity of the foaming agent have a direct impact on compressive strength of block. It is simple equipment and small investment to reduce environmental pollution of industrial waste fly ash generated and to achieve waste utilization by foaming fly ash block at the normal temperature and pressure. Non-autoclaved fly ash lightweight wall block mainly utilize potentially reactive of the industrial waste fly ash from power plant. Fly ash contains aluminum silicate massive vitreous, the vitreous stored chemical energy high after calcination, and this is the source of the activity of fly ash. But the most of the volcano ash activity is potential and its active play very slowly because of the high degree of polymerization of [SiO_4]~(4-) components, compact structure, stable chemical property. At present, the method of fly ash activation is mechanical activation and mechanical activation combined with chemical activation. The author fully excite the activity of fly ash by using the foaming agent, and test to produce the non-autoclaved fly ash lightweight wall block on account of the experimental study and theoretical analysis in the fly ash cement lime system [1].