Method for preparing concrete block by adopting rice straw

The invention discloses a method for preparing a concrete block from rice straw, which comprises the following steps: mixing 42.5-grade Portland cement, S95 fine ore grinding powder, fly ash, slag, asuperplasticizer and water, and conducting stirring at room temperature for 15-35 minutes at the stirring speed of 120-200 r/min to obtain a premix a; stirring the premix a at a stirring speed of 30-60 r/min at the stirring temperature of 70-80 DEG C, adding pretreated straw stalks, basalt fibers and ceramic fibers into the premix a in the stirring state, continuing to conduct stirring for 2-5 min, so as to obtain a premix b; and adding a foaming agent into the premix b, conducting stirring for 10-20 seconds, pouring the stirred material into a mold, conducting molding, sending the molded material into a static curing chamber, carrying out normal-pressure steam curing for 4-10 hours at the curing temperature of 40-50 DEG C and the curing humidity of 82-88%, increasing the pressure to 1.2-1.6 MPa, continuously carr