Green reinforced composite type concrete expanding agent and preparation method thereof

The invention provides a green reinforced composite type concrete expanding agent and a preparation method thereof. The expanding agent is composed of the components by mass: 40%-60% of micro beads, 20%-45% of circulating fluidized bed desulfurized ash, 10%-20% of fly ash, 0.5%-1% of an activator and 0.5%-1% of a water reducing agent. The green reinforced composite type concrete expanding agent provided by the invention not only solves the problems that resources are wasted and a serious burden is caused on the environment because the utilization rate of micro beads and circulating fluidized bed desulfurized ash is low, but also can increase the strength of concrete and improve the concrete workability and durability; in addition, the concrete expanding agent has the advantages of simple production process, low price, easy promotion and application, and relatively good economic benefits, social benefits and environmental benefits. 本发明提出种绿色增强复合型混凝土膨胀剂及其制备方法，膨胀剂由微珠、循环流化床脱硫灰、粉煤灰、激发剂和减水剂组成，各组分质量配比为：微珠40％-60％，循环流化