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Abstract The effects of single-doped and compound-doped stone powder with different specific surface areas on the properties of special mortar for aerated blocks were studied in the paper. The results show that under the condition of single admixture, with the increase of specific surface area of stone powder, the consistency and bonding strength of the special mortar gradually decrease, and the 28 d compressive strength first increases and then decreases. Under the condition of mixing two kinds of stone powder with different specific surface area, the bonding strength of special mortar prepared by A-type stone powder and B-type stone powder is the highest, the 28 d compressive strength of special mortar prepared by A-type stone powder and C-type stone powder is the largest. Under the condition of three kinds of stone powder with different specific surface area, when the ratio of A-type, B-type and C-type stone powder is 8:1:1, the comprehensive performance of the special mortar is the best. Among them, the 14 d bond strength is 0.43 MPa, and the 28 d compressive strength is 6.0 MPa
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Published: 29 January 2026
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2026, Vol. 0 
