Effects of Sodium Sulfate Attack on Concrete Incorporated with Drying-Wetting Cycles

Table 3

Experimental scheme of concrete under drying-wetting cycles and sodium sulfate attack.

Specimen code	Water-binder ratio	Concentration of sodium sulfate (mass fraction)	Drying-wetting cycle system (baking-immersing time ratio)	Times of drying-wetting cycles
N10G1	0.40	10	(36 + 1)h:(10 + 1)h	90
N5G1	0.40	5	(36 + 1)h:(10 + 1)h	90
N10G1R35	0.35	10	(36 + 1)h:(10 + 1)h	90
N10G1R45	0.45	10	(36 + 1)h:(10 + 1)h	90
N10G1F30	0.40	10	(36 + 1)h:(10 + 1)h	90
N10G1F50	0.40	10	(36 + 1)h:(10 + 1)h	90
N10G1Y90	0.40	10	(36 + 1)h:(10 + 1)h	90
N10G1Y300	0.40	10	(36 + 1)h:(10 + 1)h	90
N10G2	0.40	10	(23 + 1)h:(23 + 1)h	90

Note. N-sodium sulfate, G-drying-wetting cycle system, R-water-binder ratio, F-fly ash, and Y-curing time. The numbers after N stand for the sulfate concentration, the number after G stands for two kinds of drying-wetting cycle system, the number after R stands for the decimal value of the water-binder ratio, the number after F stands for the content of fly ash, and the number after Y stands for days of precuring.