Soda residue was used for preparing baking-free brick which originated from producing soda ash by ammonia-soda process. The effect of soda residue,fly ash,slag and powder with different contents on the strength of the baking-free brick was studied and the optimal admixture ratio was determined. The results showed that,7 d and 28 d strength of the prepared baking-free brick could reach 14. 0 MPa and 20. 6 MPa,respectively,with a water absorption of 13. 4%,when the mass ratio of soda residue,fly ash,slag and ...
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