Preparation method of fly ash based polymer concrete

The invention discloses a preparation method of fly ash based polymer concrete. The preparation method comprises the following steps that 1, 1%-9% by mass of cement and 91%-99% by mass of fly ash are evenly mixed to obtain a powder material; 2, aggregate is added into a stirrer and is stirred for 1-2 minutes, then the powder material obtained in the step 1 is added into the stirrer, and the powder material and the aggregate are mixed and stirred for 1-2 minutes; 3, alkali activation liquid is slowly added into the stirrer, the alkali activation liquid, the powder material and the aggregate are mixed and stirred for 3-5 minutes to obtain the polymer concrete. The polymer concrete can be maintained at normal temperature, application and popularization of the polymer concrete are facilitated, further the Portland cement consumption is reduced, and consumption of natural resources, mineral resources and the like is reduced. In addition, the carbon dioxide emission amount can be reduced, and huge environmental benefit is brought.