Effect Of Ultrasonication On The Thermal Insulation Performance Of Porous Flyash-Based Ceramsite Cured For Different Durations

Porous ceramsite has excellent thermal insulation performance due to numerous internal pores filled with gas which serves as a barrier to heat conduction. In order to control the pore structure of sintering-free porous ceramsite, the porous non-fired ceramsite with low thermal conductivity was prepared by ultrasonic irradiation. The effects of different natural curing time, ultrasonic irradiation time and power factors on the porosity of non-burning ceramsite were studied by measuring porosity, other physical properties, thermal conductivity and scanning electron microscopy. The results showed that: when the curing time was 6d, the ultrasonic processing power was 1944 W, and the ultrasonic time was 30min; The total porosity of ceramsite is 63.65%, the closed porosity is 12.77%, the thermal conductivity is 0.175 W/(m.K), and the thermal insulation effect is the best.