Abstract: Alkali slag, slag, redundancy soil and brick concrete fine aggregate were used as raw materials to prepare all-solid waste recycled fluid mixture. Through the tests of fluidity, setting time and compressive strength, the influence of composition and total amount of the cementitious material on the working performance and mechanical properties of fluid mixture were discussed, and the reasons for its performance changes were analyzed by XRD and SEM. The test results show that: in the range of 15%~50% of alkali slag, 20%~85% of slag, and 0%~40% of fly ash, the strength of fluid mixture is up to 1 MPa. The slag content has the most significant impact on the early and later compressive strength growth of fluid mixture. The effect of alkaline waste slag and fly ash content on the later compressive strength growth of fluid mixture is significant. Through microscopic analysis, the strength of fluid mixture is mainly attributed to the depolymerization of slag in an alkaline environment, and the interweaving of C-S-H, C-A-S-H and AFT to form a skeleton.

Key words: fluid mixture, alkali slag, fly ash, compressive strength, microscopic analysis